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HomeMy WebLinkAbout6.3 DubRchWest Attch 8a I I I I I I I t I I I ! I I -, I I I I Table of Contents 2.0 Introduction .... .... ...... ......... ........... ..... .................. ........ ............................ .......... ..... ......2 2.1 EIR Requirement......... .................................... .............................. .... .... .....................2 2.2 Scope of Supplemental EIR.......................................................................................2 2.3 Legal Basis for Supplemental EIR ............................................................................4 2.4 Organization of Draft Supplemental EIR ................................................................5 2.5 DSEIR Review Process ..............................................................................................5 2.6 Future Environmental Analysis ...............................................................................6 3.0 Project Description ......... .......... ................................................. .........................................7 3.1 Project Location................................................................................ ........... ...............7 3.2 Project Area Features............ .............. ............ ............... ........ ... ....... ..........................7 3.3 . Prior Planning Approvals: ........................................................................................8 3.4 Project Applications.............. .... ....................................................... ........................12 3.5 Project Objectives.......................... ....................................... .... ............................... .13 3.6 Project Development Plan....................... ............................ ................................... .13 3.7 Regulatory Setting ...... ............................. ......... ................ ...................... .................18 3.8 Future Actions Using This Supplemental DEIR ...................................................20 4.0 Environmental Analysis ..... .............................. ........................ .............. .........................34 4.1 Agricultural Resources .............................................. ........ ..... .... ...................... ..... ..35 4.2 Air Quality...... .... .... ................................... ............... ................... ................... ... .......38 4.3 Biological Resources ................................ ......... .......................... .............................47 4.4 Land Use ... .... .......... ...... .................................................. ................................. ... ......78 4.5 Population Housing and Employment..................................................................84 4.6 Transportation and Circulation ................................................................. .............93 4.7 Utilities and Services .............................................................................................113 4.8 Schools .......................................................................... .......... ................................128 4.9 Parks and Recreation ................................................... ..........................................131 5.0 Alternatives to the Proposed Project....................................................................... 137 5.1 Alternatives Identified in the Eastern Dublin EIR..............................................137 5.2 No Project .......... ........... ..................................................... .....................................138 5.3 Alternative 2: Reorganization and Development Under Existing General Plan and Eastern Dublin Specific Plan....................................................................139 5.4 Alternative 3: Reorganization and Development of Dublin Ranch West with Revised Neighborhood Park Loc:ation...........................................................141 5.5 Environmentally Superior Alternative ................................................................143 6.0 Required CEQA Discussion................................. ................... ............. ....................144 6.1 Cumulative Impacts ...................................................... ............................. .... .......144 6.2 Significant and Unavoidable Environmental Impacts........................................l45 7.0 Organizations and Persons Consulted....................................................................l46 7.1 Persons and Organizations ...................................................................................146 7.2 References.................................. .......... ...................................................................147 8.0 Appendices. ..................... ....................... ................ ....... .......................... ..... .............149 Appendix 8.1.. .... ... .................. .................. ..... ................................................. ....... ... ........150 Appendix 8.2........................... ... ............ ................................. ........................ ..... .............151 Appendix 8.3................................................................. ........ ...................... .... ..... .............152 Appendix 8.4........................... ............. .................... ..... .......... ........ ........... ... ....................153 Appendix 8.5.. ............................ ......................... ..... ..... ..... ..... ..................... .....................154 Appendix 8.6....... ..... ..... ......................... .......................................... .................................155 List of Tables Table 1. Summary of Supplementallmapcts/Mitigations................................ 1-1 Table 2. Existing and Proposed Land Use Designations..................................... 16 Table 3. Federal and State Ambient Air Quality Standards................................40 Table 4. Air Quality at Livermore Monitoring Site, 2000-2002 ...........................41 Table 5. Project Regional Emissions in Pounds Per Day .....................................44 Table 6. Plant and Wildlife Types..........................................................................74 Table 7. Existing and Proposed Land Use Designations.....................................82 Table 8. Regional and Tri-Valley Population Projections....................................85 Table 9. Regional and Tri-Valley Households......................................................86 Table 10. Existing and Projected Employed Residents........................................87 Table 11. Proposed Dublin Ranch West Population Generation ........................91 Table 12. Existing Intersection LOS Levels of Service .........................................97 Table 13. Existing + Approved (Baseline) Intersection LOS ...............................99 Table 14. Proposed Project Trip Generation............................................................ 101 Table 15. Baseline + Project Conditions Intersection LOS................................. 102 Table 16. Intersection Level of Service under Buildout Conditions .................106 Table 17. Summary of Freeway Analysis............................................................ 108 Table 19. Dublin Ranch West Potable Water Demand ......................................126 Table 20. Dublin Ranch West Non-Potable Water Demand .............................127 Table 21. 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Š ~ ';'1 = j ~ [ Iií ¡¡¡ ¡ 1: ~.,s]::!':] .ß' ~;ë 1! ~ i ::: 00 ._'" ~ ¡¡- ]"'t=~o " '" ~]~~lifl¡~-ollili-!BJ~1 E .!:P I E - ~-o"l!eø:¡"¡:¡"'" 'r' 5.J! .".- .~ '" :¡ Ji 1 ~ g; 'Ó i .-= ~ '5 .5 ~ J ~ -g E Î!' ß ~ ¡: '6 '" ~ 'ã !í.. t ¡;j ~ '" ] ~ .!:J:: e .8 8 '" r,ì ~ '! B 6- ~ .fo ¡¡¡ 8 ~ ~ ~ ~ 1iì î ~ £1 .ª ß l~ ~ ~ .~ .§ ¡j ¡...~~::::J-t: .8vJ3-fU QJ i~ .~_....2· I ¡¡ e ·8 e 'B 1 ë :å 'õ ~ ê ] t R ¡:¡.:: ] ¡.. is 'C -g .~ '6 ~ ~ .!Ii '" ~ ¡:¡. '" .- ~ iJ 5 '" " j! 0 - .. ª B = s ....fU~-g ::S>~O~O",=~.,s.,,~<J!OOI I P'I QJ "J:: C - .- _ ~ 6~.,s!:=~1i"'I!=~.I~~~Ælb ;:åb-¡ï¡ ~ ~'Ë §j1!~ &.-2'* ~]~~ ~ ~ I - !. lID 1 j e - - ~ S a:: I i fJ W !i ~ §' .§ ~ 1 ~ ~ B: I 5 ::J (IJ I ~ Jì ~ '5 .~.; ~ I õ"E ¡;:¡:s -g .r: :c ~ ~ð 1 ¡: '" .Eõ . =- 0 ~~ ¡¡; ; .. I I Exhibit 9 shows existing Eastern Dublin Specific Plan land use designations for the Project site and Exhibit 10 shows proposed designations for the same area. Table 2 compares land uses within the Projeçt area for the Dublin Ranch West, Bragg and Sperfslage properties under the proposed Project as compared with the current EDSP and General Plan. As çan be seen in Table 2, no land use changes are proposed for the Bragg or Sperfslage properties. Table 2 does not include the Parks RFI' A property, since no land use changes are proposed for this site. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 15 November 2004 I I I I I I II I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I Table 2. Existing and Proposed Land Use Designations Existing General Plan & EDSP Proposed General Plan & EDSP Designations Designations Gr. Mid- Gr. Mid- Ac.1 Density Range &:1 Ac' Density Range ~inl ¡ty ensity Bra!!;!! Propertv Medium High 1.0 14-25 du 20du 1.0 14-25 du 20du Density Residential Nei¡;:hborhood Park 0.6 n.a. 7,841 SF 0.6 n.a. 7.841 SF Subtotal 1.6 14-25 du 20du 1.6 14-25 du 20du I Dublin Ranch West i Property I Low Density 20.0 18-120 du 80du 18.8 16-112 du 75du I I Residential Medium Density 64.1 391-897 du 641 du 55.7 340-780 du 557 du Residential Medium High 4.8 67-120 du %du 20.2 284--503 402 du I Density Residential Nei¡¡;hborhood Park 11.8 N/A N/A 7.8 N/A N/A Nei¡¡;hborhood Square 2.8 N/A N/A 0.0 N/A N/A Open Space 70.1 N/A N/A 81.7 N/A N/A Elementary School 9.7 N/A N/A 0 N/A N/A Neighborhood 0.8 8,712-20.908 10,454 sf 0.0 N/A N/A Commercial sf Subtotal 184_1 476-1,137 du 817 du 184.1 640-1,395 du 1,034 du 8,712-20,908 10,454 sf sf Sperfsla!!e Properly Medium Density 1.0 6-14 du 10du 1.0 6-14du lOdu Residential Open Space 22 N/A N/A 2.2 N/A N/A Subtotal 3.2 6-14 du 10du 3.2 6-14 du 10du TOTAL 188.9 496-1,176 du 847 du 188.9 660-1,434 du 1,064 du 15,246-36,589 18,295 sf sf Note: 1- Gross Acres. Source: McKay & Somps Stage 1 PD Prezoning and Development Plan The PD prezoning request includes a Stage 1 Development Plan as required by Chapter 8.32 of the Dublin Zoning Ordinance. The intent of the PD District is to plan development sites as a unit with maximum flexibility to achieve efficient land uses that accommodate development, environmental protections and creative design. A Stage 1 Development Plan must identify land uses, densities and development standards, and must include a master landscape plan and development phasing plan. All land uses Dublin Ranch West Draft Supplemental EIR Page 16 City of Dublin November 2004 Dublin Ranch West Draft Supplemental EIR City of DUblin Page 17 November 2004 I I I I I I I I I I I I I I I I I I I within the Stage 1 Development Plan must be consistent with the General Plan and Specific Plan. Exhibit 11 shows the proposed Stage 1 Development Plan. The proposed Stage 1 PD-Development Plan would cover the entire Project area and reflects the general land use types, densities and locations established in the 1993 Eastern Dublin project approvals with modifications as described above. The prezoning would allow development standards and mitigation measures to be applied to the entire Project area for implementation through future individual projects. More specifically, the Stage 1 Development Plan includes a mix of residential uses at a variety of densities, parks, open spaces, roadways and similar land uses. Table 2 shows proposed land uses for the proposed Stage 1 Planned Development prezoning. If approved, the Stage 1 Development Plan would be the basis for future applications leading to development of the Project area. Pursuant to the PD-Planned Development district zoning regulations, Stage 2 Development Plans are required for subsequent site- specific development projects and must be consistent with the approved Stage 1 Development Plan. Adopted by ordinance, the Stage 2 Development Plans would complete the PD zoning process for the related sites. Future development applications following the General Plan Amendment, Eastern Dublin Specific Plan Amendment and zoning actions would include entitlements such as Stage 2 PD-Planned Development applications, Site Development Reviews (SDRs), tentative subdivision maps, use permits, development agreements and similar requests for land use entitlements. It is anticipated that for future, more specific development proposals and entitlement requests for the Project site that are consistent with this Supplemental EIR, no future environmental reviews will be required. Affordnble Housing The PD zoning provisions require Stage 1 Development Plans to address compliance with the City's Inclusionary Zoning regulations. The City's current ordinance requires 12.5 percent of all developed housing to be affordable to very low, low, and moderate incomes, or, payment of an in~lieu fee to allow the City to facilitate construction of such housing. . Dublin Ranch West Project proponents have complied with the affordable housing requirement for the Dublin Ranch West portion of the Project by entering into a Development Agreement with the City of Dublin to provide required affordable housing units off of the Project site. Access and Circulation Primary access to the Project area would continue to be via Tassajara Road, a major north-south arterial roadway that serves the eastern Dublin area as well as portions of southern Contra Costa County to the north. Tassajara Road connects to 1-580 south of the Project site which provides for regional access. Access over Tassajara Creek would be provided by two vehicular and pedestrian bridges that would connect with Collector streets within the Project area. Collector streets would provide access to local residential streets. Proposed street sections would be comparable to those already approved or I I I I I I I I I I I I I I I I I I I built in other areas of the General Plan and Eastern Dublin Specific Plan and consistent with applicable City standards. An ultimate precise alignment for Tassajara Road along the Project frontage was approved by the Dublin City Council on July 20, 2004. Pursuant to the precise alignment, Tassajara Road will be widened from two to six travel lanes to accommodate future traffic volumes in Eastern Dublin and southern Contra Costa County. Owners of the three properties within the Project area will be required to dedicate right-of-way to the City at the time of development. In accordance with the General Plan and Eastern Dublin Specific Plan policies, a primary north-south multi-use trail is planned to provide pedestrian and bicycle access through the Project area generally adjacent to Tassajara Creek, connecting urban areas with open space trails and regional trails. Utility seroices Water distribution mains are planned to be located in all major streets. Construction of water storage reservoirs are not anticipated to be part of this Project. although a water storage tank is proposed to be constructed near the Project area as a separate project undertaken by DSRSD. No water service is anticipated to be provided to portions of Dublin Ranch West that are located outside of Alameda County. Sewer service for the Project would be provided through connection to the DSRSD sewer system. When and where available, DSRSD would provide recycled water for irrigation purposes, reducing the need for potable water. All water and sewer facilities would be constructed to DSRSD standards. The stonn drainage system for proposed development on the Dublin Ranch West would flow into Tassajara Creek, located in the westerly portion of the Project area and then flow south into the Arroyo Mocho for ultimate discharge into San Francisco Bay. Future development of the Dublin Ranch West will require additional hydrology and drainage studies as mandated by the Eastern Dublin Specific Plan as well as applicable Oty ordinances and development policies. The Project area is within the adopted Alameda County Flood Control District Zone 7 Drainage Study Area, hence its expected flows are anticipated and planned for by Zone 7 and Project facilities would be sized appropriately. They would be constructed to standards adopted by Zone 7. Exhibit 12 shows the proposed master infrastructure plan for the Dublin Ranch West portion of the Project area. 3.7 Regulatory Setting The Project area is currently located in the unincorporated area of Alameda County. The County currently regulates land use for the area pursuant to the East County Area Plan (ECAP). The Project area is currently within the Dublin Sphere of Influence. If the Project is approved, the Project area would be annexed to the City of Dublin and land Dublin Ranch West Draft Supplemental EIR City of Dublin Page 18 November 2004 use would be regulated by the Dublin General Plan, the Eastern Dublin Specific Plan, the approved PD zoning and the City's other zoning and development regulations. Since approval of the Eastern Dublin project in 1993, local and state measures affecting the Project have been enacted. On the local level, the City of Dublin enacted a Development Elevation Cap for Eastern Dublin. On a state level, the statute regulating annexations was updated in 2000 as the Cortese--Knox~Hertzberg Local Government Reorganization Act. Each of these measures is discussed below. I I I I I I I I I I I I I I I I I I I Eastern Dublin Development Elevation Cap In 1998, the City of Dublin amended its General Plan to establish a Development Elevation Cap for the Eastern Extended Planning Area. The development cap limits urban development to locations below the 770' elevation contour. The intent of the cap is to identify areas where orderly and logical growth may occur adjacent to existing development, incorporating open space systems and preserving Eastern Dublin's visual resources. The Project area may be subject to the Development Elevation Cap restrictions, which are reflected in the Stage 1 Development Plan. Cortese-Knox-Hertzberg Local Government Reorganization Act Alameda County's Local Agency Formation Commission (LAFCO) is responsible for reviewing and acting upon requests for annexation to, or detachment from, cities or districts, such as the Project request for annexation to the City and DSRSD. LAFCü powers were authorized in the Cortese-Knox Act of 1985, which was comprehensively revised in the Cortese-Knox-Hertzberg Local Government Reorganization Act of 2000 ("Act"). The purpose of the Act is to encourage planned, efficient urban development patterns with appropriate consideration to preserving open space and prime agricultural lands, to discourage urban sprawl, and to encourage efficient extension of governmental services based upon local conditions and circumstances. (Government Code Sections 56001 and 56301; all citations in this subsection are to the Government Code unless otherwise noted.) The Act further recognizes that providing housing at all income levels is an important factor in promoting orderly development. The Act prefers additional growth within, or through the expansion of, the boundaries of those local agencies which can provide necessary governmental services and housing for all incomes. (Section 56001.) LAFCas have the specific authority to review, among other things, annexations to or detachment from cities or districts The Act now requires that annexation areas be prezoned and provides for annexation approvals consistent with the planned and probable use of the property based on the general plan and prezoning designations. (Sections 56375(a), (e).) Annexation requests are reviewed for consistency with adopted spheres of influence (Sections 56375.5, 56668), and for guiding development toward non-prime agricultural lands unless such development would not be orderly or efficient. (Section 56377.) Additionally, the Act sets forth a lengthy list of factors to be considered by LAFCO. (Section 56668.) The factors include but are not limited to land use and policy considerations such as population, density, land uses, growth projections for a ten-year period and fair share housing needs; social and economic interests; the physical and economic integrity of agricultural lands; and consistency with applicable Dublin Ranch West Draft Supplemental EIR Page 19 City of Dublin November 2004 I I I I I I I I I I I I I I I I I I I general and specific plans and spheres of influence. The factors also include environmental considerations such as topography, drainage basins, public services and facilities including timely availability of water supplies. The Project annexation application to LAFCO will address all of the listed factors. To the extent that such factors involve potential environmental impacts, appropriate analysis will be provided through the Eastern Dublin EIR as supplemented by this DSEIR. As noted earlier, annexation and future development of the Project area was assumed in the Eastern Dublin ElR. Therefore, the EIR analyzed the potential environmental impacts not only of the Eastern Dublin General Plan Amendment and Spedfíc: Plan, but also of annexation of the planning area to Dublin and DSRSD as applicable. Consistent with similar LAFCO policies, orderly and efficient growth and extension of services were stated objectives of the 1993 Eastern Dublin project. The 1993 approvals ultimately limited potential development to the City's Sphere of Influence, consistent with LAFCO goals. The Project area proposed for annexation includes generally the same residential land uses and densities adopted through the Eastern Dublin project and analyzed on a project and cumulative level in the Eastern Dublin ElR. As the Specific Plan excerpt above notes, traffic congestion and reduced air quality are the primary environmental effects of long distance commuting. These impacts are updated in this DSEIR. Efficient provision and extension of public services and infrastructure was an important issue in the 1993 approvals and continues to be an important issue for the proposed annexation. The Project area is located within the adopted Spheres of Influence for both the City of Dublin and DSRSD. Future development of the Project area is contemplated not only in the City's General Plan but also in DSRSD's Eastern Dublin Facilities Master Plan. The Project proposal includes a detailed Plan for Services as required by LAFCO and by the City's PD-Planned Development zoning regulations as part of a Stage 1 Development Plan. 3.8 Future Actions Using This Supplemental DEffi This Draft SEIR supplements the certified Eastern Dublin EIR pursuant to Sections 15162 and 16163 of the CEQA Guidelines for the following anticipated future actions related to the proposed Project. · City action on the General Plan Amendment and Specific Plan Amendment; · City action on the PD Prezoning and Stage 1 Development Plan; · LAFCO and City actions on annexing the Project area to the City · City actions on a Pre·Annexation and Development Agreement(s) · City actions on Stage 1 PD-Planned Development applications for the Bragg and Sperfslage properties, Stage 2 PD-Planned Development applications for Project properties, Site Development Review (SDR) applications, subdivision maps and similar land use entitlements. More specifically, the City and DSRSD actions on the annexations would include adoption of Resolutions of Application to LAFCO for annexing the Project area to the Dublin Ranch West Draft Supplemental EIR Page 20 City of Dublin November 2004 Dublin Ranch West Draft Supplemental EIR City of Dublin Page 21 November 2004 I I I I I I I I !I I I I I I I I I I I City and DSRSD. DSRSD actions would also include a Public Facility Agreement and an Area-Wide Facility Agreement. In addition to the above approvals, the DSEIR may also be used by state or regional agencies in their review of other permits required for the Project (e.g. CDFG Streambed Alteration Agreements, California Endangered Species Act permits, Water Quality Certification or waiver by the Regional Water Quality Control Board under the Oean Water Act). I I I I I I I I I I I I I § ~ . , ~ I õ u i ! I i -~ "' ð , I ~ ~ I I I "ò LivermOre 17 Exhibit 1 REGIONAL LOCATION CITY OF DUBLIN DUBLIN RANCH WEST SUPPLEMENTAL ENVIRONMENTAL IMPACT REPORT N ! """"'" I C I 2 , 4 , . , . , '--_._11_11__., I "-.-. I . r-·-.J I I I J'-.I i ." . . ~ Z'" ,\ ~'~ \\ ~ \ . \ \ \ . \ . \ . \ . \ ~ z .. 0 ï§ ~ ~ '" 0 z: ~ 0 (3 -1:1 ...I :c ~ I ~ 0 w I .., 0 I II: c.. Fallol'lRd. .:ill' z o .... Z <t '" <[ '" -" "- .. o B .-< ¡¡¡~~ ~.~ ~¡ ~ ~ ~ ~ Q ~ " ~ ~ ~ ffi ~ " ~ ~ ~ ~ ~ ~ ~ ~ ~ r--~-I'im'. ';":;.";¡;:", ¡ . .-¡ ~ ~ ~ .mu_u_._ ~ '._ .... ~'" ;.¡.¡dJ..,,,~..,' , >- .... ü z CJ " .. '" z .. '" .. 0 >- .... 11 - ü :1 " . i 'ii v r Æ .ii â < ð ~ ~ " I " I ¡; I ~ I ~ I " z '¡¡¡U¡ ~ I I I I I I I I ~ I ° ft¡ .. ~ I ;;¡ .. ts I 2 UJ ~:! 11)2 WO Z3:~ I -:l:UJ filO.. :I:i!ts Cø;i5 I II-Z:¡¡ O-UJ >...... t-D:l!I: _:I::> 00", I .... -.--.-.-........--.- I I I I I I I I I I I I I I I I I I I ~ , · r·-·-· .. -.-.-., ! -·-~1 r-._J ·'i I . · I I . · I I . \' I \\ (t".~_J Ii ., . . . ,I '\ I . . I \ IIZ! IN ! ~v'" I ! . - ! ! I i I . ! ~ ":! ~ I <) . I i i i l \ . \ .. \ . \ I i i i i I i r·..... . I . -._! z o ~ N Z c( C'> ø ~ 011:: .<: .. W III II:: C W CI) o 11. o II:: 11. - z o ,... z ., '" ., w ---' a. ~ ¡¡ ~ ~ · \ \ \ . \ . \ \ \ \ · \ \ \ \ \ \ \ \ \ \ \ . \ ~..Il...l' .. , ..,,"'\ \ i d:V~ j ,.0/-.;,'-' \. æ'?rc,O'" ø~~ J I .-- '...1 ED .::). - z o. " ., co c z ., '" "- o >- ,... <) 11 ,~ o , -<: ð · " i .. E ::; ¡; þ õ I ~ . I . I ~ ~ Z 'iiiI~ ~ Ii; o It 0: l- t) tE ;¡ ..J ¡:! :z: W I-:!i r.nZ 1110 z3=~ _:l:Z ...lOW mz..J :I<¡$ Ca:Z ILz!!i o-w >-...I..J !::~8: ooii! .-- --" TIPPER coo"'" cOs1P- J__ CON~'"--;oÚNTi . ^,-^".DA UN (OUßl.IN RANCH WEST) BRAGG UNITED STATES DF AMERICA (PARKS RESERVE FoRCES TRAININC,; AREA) ! . ~ ~ f g .~ -< ð " , " SPERFSLAGE EBRPD SOURCE: Alameda County Community Development Agency. May 2002_ CITY OF DUBLIN DUBLIN RANCH WEST SUPPlEMENTAL ENVIRONMENTAL IMPACT REPORT -- I I I I MISSION I PEAK HOMES I UN1NCOf!!IPOriATrD ALAMEDA COUNTY I -------- CITY QF ¡;;UaUN PINN I I I I I I I I I --' MOllER SILVERIA NEILSEN ARAC KOBO!.D DUßUN RANCH PHASE 1 Exhibit 4 I PROPERTY OWNERSHIP N Area Boundary I i , 300 /1OlJ ."".... I . . I I ... ------- ------... I I I I I I I I I I I I I I I I I I I , ....." ~ ;; ;; ~ ~ u f j B . u o , < ð J ~ ouN-rI COS~ ~--- CON~ ~ ~ COlJNf'I' -' "Eo.' rJ.A uNINCoRrorrATl!D A1.A~DA ÇOUNTY C"11Y Dr DU8L1N Exhibit 5 TOPOGRAPHY CITY OF DUBLIN DUBLIN RANCH WEST SIJPPUõ!4ENTAL- ENVIRON!4ENTAL-IIIIIPACT REPORT N t Area Boundary o I 300 $00 1200~t , I L Low Density Residentia I MH Medium-High Density Residential RM Resource Management WM Water Management cos:rp. CO~~ ¡RÄ __ r coN __ r - Co\,JNíf ." ...DA ALA'" ! · · ~ ¡¡ ! ! ~ -~ -< ð · .. .-- --" SOURC£, A/8med. County Community DevelOpment AgBncy, MBY 2002. CITY OF DUBLIN DUBLIN RANCH WEST SUPPLEMENTAL ENVIRONMENTAL IMPACT REPORT --" -- WM VNlNÇORPOMTêD AlAMEDA COUNTY --~-~~-~-- CITY OF ~UBLIN Exhibit 6 LAND USE DESIGNATIONS, EAST COUNTY AREA PLAN Revi$ed to Implement Measure D N i Area Boundary . I 300 600 1200_ t I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I ~ " :;: I ! jj 6 t . I ! ~ -~ ~ I 6 . ~ ~ I I I I .... ..___...m --- --- .--- ---" "Nfl cOSí,ll. COJ..-- ¡;ÖN~I-øÚNít' -~LÞ-rw1EDA M uNJNCORFO~TED AUlMEl)A ÇOUNTY ---_._--~~ CITY Or tJVaL./N ES Elementary School L Low Density Residential M Medium Density Residential MH Medium-High Density Residential NC Neighborhood Commercial NP Neighborhood Park NS Neighborhood Square OS Open Space SOURCF;: Wallace Rol;J."s & Todd, 5-10--1993_ Exhibit 1 EASTERN EXTENDED PLANNING AREA GENERAL PLAN: EXISTING CITY OF DUBLIN DUBLIN RANCH WEST SUPPLEMENTAL ENVIRONMENTAL IMPACT REPORT N i Area Boundary o I 3lJ() 600 12Q01eet , I ..- ..-" ..- cOs" C?y~ cON~~r~iJNíY ". "ED'" ,,,^ L M os ~ & . ~ ~ f ! g ~ " < ð ..! ~ L Low Density Residential M Medium Density Residential MH Medium-High Density Residential NC Neighborhood Commercial NP Neighborhood Park OS Open Space SOfJRCE: MaoKay& Somps, r;J.13-ZQQ4, ..-" Exhibit 8 I I I I I I UNINCORPORAÆD ALAMeDA L;OI.1NTY ----~----- I CITY OF DUBLIN I I I I I I I I I I I I EASTERN EXTENDED PLANNING AREA GENERAL PLAN: PROPOSED CITY OF DUBLIN DUBLIN RANCH WEST SUPPLEMENTAL ENVIRONMENTAL IMPACT REPORT N i , I "'" Area Boundary 300 , '200_ I I I I I I I I I I I I I ~ Ii . ~ I ;1 f ! I ~ -~ ~ ð I ~ '" I I I I COSTA Ci?~~ CoN1'~~røI,.lNíY . ~",~EDA ES Elementary School L Low Density Residential M Medium Density Residential MH Medium-High Density Residential NC Neighborhood Commercial NP Neighborhood Park NS Neighborhood Square OS Open Space Project Road ""U""'."II Multi-Use Trail SOURCE: Wallace Roberts & Todd, 5·1[}-1993, CITY OF DUBLIN DUBLIN RANCH WEST SUPPLEMENTAL ENVIRONMEt.lTAL IMPACT REPORT --- --- ---' ------ fTYOFD/,JBLlN Exhibit 9 EASTERN DUBLIN SPECIFIC PLAN: EXISTING N ~ Area Boundary o I 3Q(} , eoo 12001861 , I ...-- ...-- ...--- ~ ~ . ! ~ t J! B -;; c ~ ð . , " COSíA CO~~ -"". ...--- ~ <;01'1':;'-_- COWl'll' -~""",,"DA L Low Density Residential M Medium Density Residential MH Medium-High Density Residential NP Neighbomood Park OS Open Space . . \ -g ~ " ... \, , \. \. Project Road ......4II1II.111*.. Multi-Use Traíl , , - SOURCE: MacKay & Somps. 4-28·2003. 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Dublin Ranch West Draft Supplemental EIR City of Dubiin Page 34 November 2004 I I I I I I I I I I I I I I I I I I I 4.0 Environmental Analysis Topics Addressed in the DEIR This section of the DEIR identifies specific environmental areas which may be affected as a result of the implementation of the proposed Project. The impact areas are discussed individually in subsections 4.1 through 4.8: 4.1 Agricultural Resources 4.2 Air Quality 4.3 Biological Resources 4.4 Land Use 4.5 Population and Housing 4.6 Transportation and Circulation 4.7 Utilities and Public Services 4.8 Parks and Recreation Each topic area is covered in the following manner: A. Environmental Setting A discussion of existing conditions, facilities, services and general environmental conditions on and around the project sites. B. Impacts and Mitigation Measures from the Eastern Dublin EIR C. Supplemental Environmental Impacts An identification and evaluation of whether the potential impacts on the environment identified in the Initial Study, should the Project be constructed as proposed would result in a significant substantially increased manner beyond the analysis in the Eastern Dublin EIR based on the standards of significance set forth therein. D. Supplemental Mitigation Measures An identification of specific efforts and measures which can be incorporated into ~e. Pr?i.ect to reduce identified supplemental environmental impacts to a level of lIlSlgniticance. I I I I I I I I I I I I I I I I I I I 4.1 Agricultural Resources Agricultural resources were analyzed in Chapter 3.1, Land Use, of the Eastern Dublin EIR. In 2000, the Cortese-Knox-Hertzberg Local Government Reorganization Act (AB 2838) extensively modified the state's annexation law. Among the modifications was a new definition of "prime" agricultural lands. This supplement to the Eastern Dublin EIR examines whether previously identified agricultural conversion impacts would be increased substantially under the recently enacted definition of prime agricultural lands. ENVIRONMENTAL SETTING The Eastern Dublin EIR contains a description of agricultural resources on and around the Project area at the time of certification. Agricultural and grazing uses historically predominated within the Project area and throughout the GP AI SP area. Urban development has commenced pursuant to the adopted GP A I SP on lands immediately east of the Project area and agricultural uses, induding cattle grazing have recently ceased on the Project site. The Project site is currently fallow. There are no current Williamson Act Land Conservation Agreements within the Project area. The Alameda County Important Farmland Map (2000) designates the Project area as "Grazing Lands," with vegetation found on lands within this classification being suitable for grazing of livestock. Future development of the Project area would generally implement the land uses and densities approved for the area through the Eastern Dublin GPA/SP. As future implementing projects are approved and built, the current agricultural and undeveloped lands will convert to urban uses, as anticipated in the GP A/SP and analyzed in the Eastern Dublin EIR. IMPACTS AND MITIGATIONS FROM THE EASTERN DUBLIN EIR The Eastern Dublin EIR analyzed conversion of agricultural lands to urban uses, focusing on farmlands of local importance, prime agricultural lands, and lands subject to Williamson Act contract. Much of the Project area supports farmlands" of local importance" (see Figure 4.1-B). Farmlands "of local importance" are defined as those that contribute to local production of food, feed, fiber, forage and oilseed crops. The agricultural lands in the Project area are of local importance for grazing. Generally, areas of locally important farmland on the Project area occur in the flatter or gently sloped portions while lands designated as "Other" on Figure 3.1-B are located in the northern, steeper portions. "Other" soils include all soils not of local or statewide importance. The Eastern Dublin EIR also identified small amounts of prime agricultural land in the southern portion of the EDSP area (not on this Project site), based on the then- Dublin Ranch West Draft Supplemental EIR City of Dublin Page 35 November 2004 applicable definition (for annexation purposes) of "prime agricultural lands" contained in Section 56064 of the Cortese-Knox Act (Eastern Dublin EIR, response to comment 24- 3; Figure 3.1). No prime agricultural lands were identified on the Project site. Impact 3.1 I C identified discontinuation of agricultural uses as an insignificant impact due to urban development pressure and higher property tax rates, espedally since many of the then property owners had filed notices of non-renewal for Williamson Ad contracts. Impact 3.1 I D assumed the complete loss of farmlands of local importance throughout the GP AI SP area, including the loss of prime agricultural lands. The Eastern Dublin EIR determined that the loss of agricultural lands was not a significant impact because; 1) the area of prime farmland comprises a relatively small portion of a much larger area of non-prime farmland; 2) maintaining this land in agricultural uses would deter the orderly and effident development of the area; 3) the area's conversion would not threaten any other prime farmland with urbanization; and 4) the area of prime agricultural soils already lie within the City's sphere of influence (Eastern Dublin EIR, response to comment 24-3.). The Final Eastern Dublin EIR, in response to a comment, aclœowledged that the Cortese-Knox Ad contains a different definition of "prime agricultural lands," which resulted in approximately 200 acres of "prime" lands in the GP A/EDSP area. (Eastern Dublin EIR, response to comment 24.3). Addressing conversion to urban uses more generally, the Eastern Dublin EIR noted that approximately one-half of the GP A/SP area agricultural activity would be lost to future development. Because 61% of Williamson Act lands already had filed for non-renewal and with the "relatively limited value of the non-prime soil," Impact 3.1 I C identified discontinuation of agricultural uses as less than significant. Although finding GP A/SP- wide loss of agricultural lands less than significant the Eastern Dublin EIR identified cumulative loss of agricultural and open space lands as a significant unavoidable impact. (Eastern Dublin EIR, response to comment 34-9, Impact 3.1/F.) Upon approval of the Eastern Dublin GP A/SP, the City adopted a Statement of Overriding Considerations for this impact (Appendix 8.4). SUPPLEMENTAL IMPACTS AND MITIGATION MEASURES The Cortese-Knox Act (Gov't. Code Sec 5600 et. seq.) governed annexations when the Eastern Dublin EIR was certified. The Act recently was amended by AB 2838 to, among other things, revise the definition of prime agricultural lands. Pursuant to the Initial Study for the annexation and prezoning Project, this supplement examines whether the revised definition of prime agricultural lands would result in more lands qualifying as prime than at the time of the Eastern Dublin EIR certification. Significance Criteria. Agricultural resource impacts would be significant if the Projed would convert prime agricultural land to non-agricultural use or impair the productivity of prime agricultural land to a substantially greater degree than analyzed in the Eastern Dublin EIR. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 36 November 2004 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I Supplemental Impacts. No supplemental impacts are expected from the revised definition of prime agricultural lands. Under AB 2838, soils are considered prime agrkultural land if they meet any of the following criteria: 1) NRCS rating of Class I or Class II, if irrigated, provided irrigation is feasible 2) Storie Index rating of 80-100 3) Supports livestock used for food or fiber and has an annual carrying capadty of at least one animal-unit per acre 4) Planted with fruit or nut trees, or other unprocessed agricultural plant products with production of $400 I acre or more in the past five years Based on research performed by Berlogar Geotechnical Consultants, the Project area does not contain any Class I or Class II soils as identified in the "Soil Survey, Alameda Area, California" (March 1966), prepared by the U.S.D.A Soil Conservation Service. Based on site hydrogeological characteristics and local test well pumping results, irrigation of the Project area would not be feasible. Therefore, the first criterion would not be met. Information on Storie Index Rating for soils in the Dublin area are contained in the "Soil Survey, Alameda Area, California," issued by the USDA Soil Conservation Service in March of 1966. Based on this report, soils with the highest Storie Index Rating within the Project area is 49, which is less than the 80 Index Rating required to define prime agricultural soils. Therefore, the second criterion for prime agricultural soils would not be met. Although the Alameda County Important Farmland Map (2000) designates the Project area as "Grazing Lands," information provided by two local cattle ranchers indicate that the carrying capacity of lands within the Project area is approximately 0.10 animal unit per acre, which is consistent with the general soil type, water resources and topography of the Eastern Dublin area. Therefore, the third criterion for prime agricultural soils would not be met. Regarding the fourth criterion, production of at least $400 per year within the past three of five years of unprocessed agricultural plant products, the site has not been planted in agricultural products within the past five years. Therefore, this last criteria for prime agricultural soils would not be met. The Project area does not contain any current Williamson Act Land Conservation Agreements. Based on the above information, the Project area does not met the criteria for prime agricultural soils as defined by AB 2838 (Section 56064 of the California Gov't. Code) and there would be no 5t\Wlemental significant impacts regarding this topic. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 37 November 2004 4.2 AIR QUALITY INTRODUCTION Air quality impacts were analyzed in Chapter 3.11 of the Eastern Dublin EIR. This supplement to the EIR examines compliance with applicable significance thresholds, utilizes updated methods of analysis, and is based on current traffic forecasts that reflect changes in roadway improvements and travel patterns that have occurred since certification of the Eastern Dublin EIR. This supplement also examines changes in the regulatory standards since the previous EIR. This section of the DSEIR is based on a supplemental air quality analysis prepared by Donald Ballanti and included in Appendix 8.5. ENVIRONMENTAL SETTING The Project is within the Livermore-Amador Valley. The Livermore-Amador Valley forms a small subregional air basin distinct from the larger San Francisco Bay Area Air Basin. The Livermore-Amador Valley air basin is surrounded on all sides by high hills or mountains. Significant breaks in the hills surrounding the air basin are Niles Canyon and the San Ramon Valley, which extends northward into Contra Costa County. The terrain of the Livermore-Amador Valley influences both the climate and air pollution potential of the sub-regional air basin. As an inland, protected valley, the area has generally lighter winds and a higher frequency of calm conditions when compared to the greater Bay Area. The occurrence of episodes of high atmospheric stability, known as inversion conditions, severely limits the ability of the atmosphere to disperse pollutants vertically. Inversions occur during all seasons in the Bay Area, but are particularly prevalent in the summer months when they are present about 90% of the time in both morning and afternoon. According to the Bay Area Air Quality Management District, air pollution E'0tential is high in the Livermore Valley, especially for ozone in the summer and fall (BAAQMD, 1999). High temperatures increase the potential for ozone, and the valley not only traps locally generated pollutants but also can be the receptor of ozone and ozone precursors from upwind portions of the greater Bay Area. Transport of pollutants also occurs between the Livermore Valley and the San Joaquin Valley to the east. During the winter, the sheltering effect of terrain and its inland location results in frequent surface-based inversions. Under these conditions, pollutants such as carbon monoxide from automobiles and particulate matter generated by fireplaces and agricultural burning can become concentrated. IMPACTS AND MITIGATIONS FROM THE EASTERN DUBLIN EIR The Eastern Dublin EIR identified significant impacts related to construction, mobile source and stationary source emissions (Impacts 3.11 I A, B, C, E). Mitigation measures Dublin Ranch West Draft Supplemental EIR Page 38 City of Dublin November 2004 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I were adopted to control construction dust and exhaust emissions, and to minimize mobile and stationary source emissions through, among other things, cooperative transportation and air quality planning and transportation demand management. All mitigation measures adopted upon approval of the Eastern Dublin GP AI SP continue to apply to implementing actions and projects such as the proposed Project. Even with mitigation; however, significant cumulative construction, mobile source and stationary source impacts remained. (Impacts 3.11 I A, B, C, E). Upon approval of the Eastern Dublin GP AI SP, the City adopted a Statement of Overriding Considerations for these significant unavoidable impacts. (Resolution No. 53-93.) SUPPLEMENTAL IMPACfS AND MITIGATION MEASURES The proposed General Plan and Specific Plan amendment would change land uses and development intensity from those analyzed in the Eastern Dublin EIR, although the daily traffic generation would be slightly less than assumed in the Eastern Dublin EIR (See Section 3.6, Transportation and Circulation). Since preparation of the Eastern Dublin EIR there have been several regulatory changes, methods for air quality analysis as well as changes to applicable thresholds of environmental significance. Pursuant to Guidelines Section 15162 and 15163, this supplement assesses whether new or intensified air quality impacts will result from increased regional traffic and changed regulatory standards. Changes to the Regulatory Setting Ambient Air Quality Standards. The federal and California ambient air quality standards are summarized in Table 3 for important pollutants. The federal and state ambient standards were developed independently with differing purposes and methods, although both federal and state standards are intended to avoid health~related effects. As a result, the federal and state standards differ in some cases. In general, the California state standards are more stringent. This is particularly true for ozone and PMIO. The U.s. Environmental Protection Agency established new national air quality standards for ground-level ozone and for fine particulate matter in 1997. The existing 1- hour ozone standard of 0.12 PPM microns or less) is to be phased out and replaced by an 8-hour standard of 0.08 PPM. Implementation of the 8-hour standard was delayed by litigation, but was determined to be valid and enforceable by the U. S. Supreme Court in a decision issued in February of 2001. However, the new federal ozone standard is not yet in effect pending final resolution of this litigation and adoption of implementing regulations. In 1997 new national standards for fine Particulate Matter (diameter 2.5 microns or less) were adopted for 24-hour and annual averaging periods. The current PM10 standards were to be retained, but the method and form for determining compliance with the standards were to be revised. Implementation of this standard was delayed by litigation Dublin Ranch West Draft Supplemental EIR City of Dublin Page 39 November 2004 Dublin Ranch West Draft Supplemental EIR City ot Dublin Page 40 November 2004 I I I I I I I I I I I I I I I I I I I and will not occur until the U. S. Environmental Protection Agency has issued court- approved guidance. The State of California regularly reviews scientific literature regarding the health effects and exposure to PM and other pollutants. On May 3, 2002, the California Air Resources Board (CARB) staff recommended lowering the level of the annual standard for PMlO and establishing a new annual standard for PM2.s (particulate matter 2.5 micrometers in diameter and smaller). The new standards became effective on July 5, 2003. Table 3. Federal and State Ambient Air Quality Standards Pollutant Averaging Federal State Time Primary Standard Standard Ozone I-Hour 0.12 ppm 0.09 ppm 8-Hour 0.08 DDm - Carbon Monoxide 8-Hour 9.0 ppm 9.0 ppm I-Hour 35.0 DDm 20.0 DDm Nitrogen Dioxide Annual 0.05 ppm -- I-Hour -- 0.25 ppm Sulfur Dioxide Annual 0.03 ppm -- 24-Hour 0.14 ppm 0.05 ppm I-Hour -- 0.25 ppm PM¡O Annual 50 ug/m 3 20 ug/m3 24-Hour 150 u£!m3 50 ug/m3 PM2.S Annual 15 ug/m 3 12 ug/m3 24-Hour 65 u£!m3 -- Lead 30-Day Avg. -- 1.5 ug/m3 3-Month Avg. l.5ug/m 3 -- ppm = parts per million ug/m 3 = Micrograms per Cubic Meter Source: Donald Ballanti In addition to the criteria pollutants discussed above, Toxic Air Contaminants (TACs) are another group of pollutants of concern. Toxic Air Contaminants (TACs) are injurious in small quantities and are regulated despite the absence of criteria documents. The identification, regulation and monitoring of T ACs is relatively recent compared to that for criteria pollutants. Current Air Quality. The Project is within the nine-county Bay Area Air Basin. The Bay Area Air Quality Management District (BAAQMD) operates a network of air quality monitoring sites in the region. The closest to the site is located in central Livermore on Old First Street. Table 3 shows a summary of air quality data for this monitoring site for I I I I I I I I I I I I I I I I I I I the period 2000-2002. Data are shown for ozone, carbon monoxide, PM10, PM2.5. and nitrogen dioxide. The number of days exceeding each standard is shown for each year. Table 4 shows that concentrations of carbon monoxide and nitrogen dioxide at the Livermore monitoring site meet state/federal standards. Ozone concentrations exceed both the state and federal standards, and exhibit wide variations from year-to-year related to meteorological conditions. Years where the summer months tend to be warmer than average tend to have higher average ozone concentrations while years with cooler than average temperatures tend to have lower average ozone concentrations. Table 4. Air Quality at Livermore Monitoring Site, 2000-2002 I Pollutant i Standard Davs Standard Exceeded Durin£!:: I 2000 2001 2002 Ozone Federall·Hour 1 0 2 Ozone State I-Hour 7 9 10 Ozone Federal8-Hour 2 2 6 PMlO Federal 24-Hour 0 0 0 PMlO State 24-Hour 2 3 0 PM2-5 Federal 24-Hour 0 1 0 Carbon State/Federal 0 0 0 Monoxide 8-Hour Nitrogen State I-Hour 0 0 0 Dioxide Source: CARB, 2003 Levels of PM10 at Livermore meet the federal ambient standards but exceed the more stringent state standards. PM2.5 emissions at the Livermore station exceeded state standards one day in 2001. Attainment Status. The federal Clean Air Act and the California Clean Air Act of 1988 require that the California Air Resoun::es Board (CARE), based on air quality monitoring data, designate air basins within the state where the federal or state ambient air quality standards are not met as "non-attainment areas". Because of the differences between the federal and state standards, the designation of non-attainment areas is different under the federal and state legislation. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 41 November 2004 In 1995, after several years of minimal violations of the federal one-hour ozone standard, the U.s. Environmental Protection Agency (EP A) revised the designation of the Bay Area Air Basin from "non-attainment" to "attainment" for this standard. However. with less favorable meteorology in subsequent years, violations of the one-hour ozone standard again were observed in the basin, particularly at the Livermore monitoring station. Effective August 1998, the EP A downgraded the Bay Area's classification for this standard from a "maintenance" area to an "unclassified non-attainment" area. Also in 1998, after many years without violations of any carbon monoxide (CO) standards, the attainment status for CO was upgraded to "attainment." I I I I I I I I I I I I I I I I I I I The California Air Resources Board and U. S. Environmental Protection Agency have both proposed that the San Francisco Bay Area be classified as a nonattainment area for the federal 8-hour standard. The California Air Resources Board and U. S. Environmental Protection Agency have both proposed that the San Francisco Bay Area be considered unclassifiable with respect to the federal PM2.5 standards. Unclassifiable means that an area cannot be classified on the basis of available information as meeting or not meeting the national primary or secondary ambient air quality standard for the pollutant. U.s. EP A plans to finalize PM2.5 designations by December 15, 2004. The San Francisco Bay Area Air Basin is currently non-attainment for ozone (state and federal standards) and PM 10 (state ambient standard). However, in April 2004, the U.s. EP A made a final finding that the Bay area has attained the national one-hour standard. The finding of attainment does not mean the Bay area has been reclassified as an attainment area for the I-hour standard. The region must submit a redesignation request to the EP A in order to be reclassified as an attainment area. While air quality plans exist for ozone, none exists (or is currently required) for PMIO' The Revised San Francisco Bay Area Ozone Attainment Plan for the 1-Hour National Ozone Standard (BAAQMD, 2001) is the current ozone air quality plan required under the federal Clean Air Act. The state-mandated regional air quality plan is the Bay Area 2000 Clean Air Plan (BAAQMD, 2000). These plans contain mobile source controls, stationary source controls and transportation control measures to be implemented in the region to attain the state and federal ozone standards within the Bay Area Air Basin. BAAQMD CEQA Guidelines. The document BAAQMD CEQA Guidelines was published subsequent to the publication of the East Dublin EIR These Guidelines provide recommended mitigation practices during construction based on the size of the Project and expanded recommended mitigations for operational impacts of commercial projects. Significance criteria. The BAAQMD has revised recommended thresholds of significance since publication of the East Dublin EIR (BAAQMD, 1999). The document BAAQMD CEQA Guidelines establishes the following impact criteria: · A significant impact on local air quality is defined as an increase in carbon monoxide concentrations that causes a violation of the most stringent ambient air quality standard for carbon monoxide (20 ppm for the one-hour averaging period, 9.0 ppm for the eight-hour averaging period). Dublin Ranch West Draft Supplemental EIR Page 42 City of Dublin November 2004 I I I I I I I I I I I I I I I I I I I · A significant impact on regional air quality is defined as an increase in emissions of an ozone precursor or PMlO exceeding the BAAQMD thresholds of significance. The current significance thresholds are SO pounds per day (or 15 tons/year) for ozone precursors or PMlO. · .Any proposed project that would individually have a significant air quality impact would also be considered to have a significant cumulative air quality impact. · .Any project with the potential to frequently expose members of the public to objectionable odors would be deemed to have a significant impact. Despite the establishment of both federal and state standards for PM2.5 (partíc:ulate matter, 2.5 microns), the BAAQMD has not developed a threshold of significance for this pollutant. For this analysis, PM2-s impacts would be considered significant if project emissions of PMlO exceed 80 pounds per day. The current BAAQMD significance threshold for construction dust impact is based on the appropriateness of construction dust controls. The BAAQMD guidelines provide feasible control measures for construction emission of PM10. If the appropriate construction controls are to be implemented, then air pollutant emissions for construction activities would be considered less-than-significant. Supplemental Impacts and Mitigation Measures. The following supplemental air quality impacts and mitigation measures are identified in this DSEIR. Supplemental Impact AO-1. Construction activities would have the potential to cause nuisance related to dust and PM10' The current BAAQMD significance threshold for construction dust impact is based on the appropriateness of construction dust controls. If the appropriate construction controls are to be implemented, then air pollutant emissions for çonstruction activities would be considered less-than-significant. Mitigation Measure:MM 3.11 / 1.0 in the East Dublin EIR implements most, but not all, of the currently recommended measures. Supplemental Miti~ation SM-AO-1. In addition to measures identified in Mitigation Measure 3.11/1.0 of the East Dublin EIR, the City of Dublin shall; a) Require construction contractors to water or cover stockpiles of debris, soil, sand or other materials that can be blown by the wind. b) Require construction contractors to sweep daily (preferably with water sweepers) all paved access road, parking areas and staging areas at construction sites. c) Require construction contractors to install sandbags or other erosion control measures to prevent silt runoff to public roadways. Ac:c:ording the current BAAQMD CEQA guidelines, implementation of these mitigation measures would reduce construction period air quality impacts to a less-than-signíficant level. Dublin Ranch West Draft Supplemental ËIR City of Dublin Page 43 November 2004 Supplemental Impact AO-2. The Project would result in a regional emission increase that would exceed the BAAQMD significance thresholds for ozone precursors. Vehicle trips generated by the Project would result in air pollutant emissions affecting the entire San Francisco Bay Air Basin. Regional emissions associated with Project vehide use have been calculated using the URBEMI5-2002 emission model. I I I I I I I I I I I I I I I I I I I The incremental daily emission increase associated with Project operational trip generation is identified in Table 5 for reactive organic gases and oxides of nitrogen (two precursors of ozone) and PMlO' Also shown is the emission increase under the existing Spedfic Plan designations. The Bay Area Air Quality Management District's thresholds of significance for these pollutants are also shown. Proposed Project emissions shown in Table 4 would exceed these thresholds of significance for ROG and NO", so the proposed Project would have a significant effect on regional ozone air quality. Table 5. Project Regional Emissions in Pounds Per Day Reactive Nitrogen PM10 Organic Oxides Gases Project 116.9 116.6 89.9 Development under 109.5 102.9 78.9 Existing Specific Plan BAAQMD Significance 80.0 SO.O SO.O Threshold Source: Donald Ballanti. 2004 fu!J2plemental MitiJation SM-AQ..2. In addition to measures identified in MM 3.11/5.0-11.0 of the East Dublin EIR, the City of Dublin shall require that the following be implemented: a) The Project proponent should coordinate with LA VT A for the eventual extension of transit service to the Project site. The Project proponent should construct or reserve necessary right-of-way for transit facilities such as bus tumouts/bus bulbs, benches, etc. b) Provide bicycle land and/or paths, cOlUlected to community-wide network. c) Provide sidewalks and/or paths, cOlUlected to adjacent land uses, transit stops, and/or community-wide network. d) Consider shuttle service to regional transit system or multimodal center. e) Consider providing a satellite telecommute center for Project residents if this is feasible in terms of a convenient location. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 44 November 2004 I I I I I I I I I I I I I I I I I I I f) Provide interconnected street network, with a regular grid or similar interconnected street pattern. Implementation of the mitigation measures in the Eastern Dublin EIR (Mitigation Measures 3.11/5.0--11.0 together with the above measures will not achieve the more than 30% reduction in Project-related emissions that would be needed to reduce emissions below the BAAQMD thresholds of significance. Ozone air quality impacts will remain sig:r¡ificant and unavoidable. S1\Pplementallmpact AO-3. Project-related regional emissions would exceed the BAAQMD thresholds of significance for ozone precursors, resulting in a significant and unavoidable cumulative impact According to BAAQMD significance criteria, any proposed Project that would individually have a significant air quality impact would also be considered to have a significant cumulative air quality impact. Since the proposed Project, after mitigation, would exceed the BAAQMD thresholds of significance for Reactive Organic Gases and Nitrogen Oxides, the Project would continue to have a significant unavoidable cumulative impact on regional air quality. Supplemental Mitigation Measure SM-AO-3. Same as Supplemental Mitigation AQ-2. Supplemental Impact AO-4. The Project would change traffic volumes and congestion levels, changing carbon monoxide concentrations. This is a less-than-significant impact On the local scale, the Project would change traffic on the local street network (see Section 4.6, Transportation and Circulation), changing carbon monoxide levels along roadways used by Project traffic. Carbon monoxide is an odorless, colorless poisonous gas whose primary source in the Bay Area is automobiles. Concentrations of this gas are highest near intersections of major roads. New vehicle trips add to carbon monoxide concentrations near streets providing access to the site. The Bay Area Air Quality Management District's BAAQMD CEQA Guidelines recommends estimation of carbon monoxide concentrations for projects where project traffic would impact intersections or roadway links operating at Level of Service D, E, or F or would cause Level of Service to decline to D, E, or F. The analysis of intersection Level of Service (LOS) prepared for the Project found that, of the 19 existing intersections studied, none would operate at LOS D or worse after addition of Project traffic in either the AM or PM peak traffic hour. Therefore, the BAAQMD threshold trigger level for estimating carbon monoxide modeling of concentrations would not be exceeded. Considering that the proposed Project is in an attainment area for carbon monoxide (the state and federal ambient standards are met), that Dublin has relatively low background levels of carbon monoxide compared to other parts of the Bay Area and Dublin Ranch West Draft Supplemental EIR Page 45 City of Dublin November 2004 that Levels of Service at intersections affected by Project traffic would remain acceptable (see Section 4.6, Transportation and Circulation), the conclusion of the East Dublin EIR that the Project would have a less-than-signíficant supplemental impact on local carbon monoxide concentrations is confirmed. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 46 November 2004 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 4.3 BIOLOGICAL RESOURCES This section provides infonnation on the biological resources within the boundaries and in the vicinity of the Dublin Ranch West area. Biological resources were analyzed in Chapter 3.7 of the 1993 Eastern Dublin EIR, a program EIR for the Eastern Dublin Specific Plan area. The Project applicant has proposed land use changes for the Project area from that proposed in the Specific Plan, and the City of Dublin has determined a Supplemental EIR is necessary. The purpose of this section is to supplement the 1993 Eastern Dublin Specific Plan EIR, with respect to the proposed Project, and to update infonnation regarding special status plant and wildlife species, sensitive habitats, and any regulatory changes that may have occurred since approval of the 1993 EIR. The biological resources found on the Dublin Ranch West site have been studied in depth by H.T Harvey and Associates (RT. Harvey and Associates, Inc. (HIH), 2002). This section updates species and regulatory infonnation from recent studies on the Project site, and provides an analysis of impacts and mitigation measures specific to the Project. ENVIRONMENTAL SETI1NG General Project Area Characteristics The proposed Project area includes 81.7 acres of open space. Approximately 60 acres of this open space are located within the Tassajara Creek Management Zone (TCMZ) and within a private open space area between the development area and the TCMZ. There are approximately 23 acres of additional open space along the western property boundary (see Exhibit 13, Tassajara Creek Conservation Area). The preserved biological resources within the TCMZ will be managed according to the Tassajara Creek Conservation Area Management Plan. The Project area is located just west of Tassajara Road in the Tassajara Creek Watershed. The Project site lies primarily within the Livennore U.S. Geological Survey quadrangle map and is dominated by the flat valley floor and moderately sloped hillsides forming the Tassajara Valley. Elevations range from approximately 400 feet on the Tassajara Valley floor, to approximately 700 feet in the hills in the northwest corner of the site. The portions of the Project area has been used for cattle grazing, and several ranch buildings exist along the east side of Tassajara Creek. Adjacent land uses include the Parks Reserve Forces Training Area (RFTA) along the Project area's western boundary, Tassajara Creek Regional Park to the south, and residential development (existing and currently under construction) consisting of a few homes and other outbuildings north and east of the Project area (H.T. Harvey & Associates 2002). Project Area Habitat Types and Locations. The Project area, consisting of the development area and the approximately 23-acre western open space area, is Dublin Ranch West Draft Supplemental EIR City of Dublin Page 47 November 2004 dominated by non~native grassland (approximately 133 acres), with small areas of developed lands (approximately 1.0 acre), riparian woodland (approximately 0.4 acre), and other aquatic habitat (approximately 0.1 acre). A substantial amount of riparian woodland (approximately 15 acres) exists within the TCMZ, and the adjacent private open space area consists mostly of non-native grassland habitat with some riparian habitat (lITH 2002). Orùy riparian vegetation and aquatic habitat associated with the two proposed bridge crossings have been addressed. Non-native Grassland. The majority of the Project area is dominated by non-native grassland that has been historically, and has been used for livestock grazing. This habitat type is common in California and is the result of human alteration of California's perennial grasslands through fire suppression, grazing, and introduction of exotic annual grasses and weed species. Introduced annuals common to the site and this habitat type include wild oat (Avena spp.), ripgut brome (Bromus diandrus), and yellow starthistle (Centaurea solstitialis). A number of species adapted to more alkaline conditions also exist in scattered populations throughout the site including salt grass (Distichlis spicata) and the special status plant Congdon's tarplant (Centromadia panyi ssp. congdonii). A number of wildlife species are associated with annual grasslands in eastern Alameda County and are expected to use the Project site. Mammals that breed and burrow in this habitat type include the California ground squirrel (Spermophilus beecheyi), pocket gopher (Thomomys bottae), California vole (Microtus californicus), black-tailed hare (Lepus californicus) and California meadow mouse (Microtus californieus californicus). These species provide an important prey base for raptors and predatory manunals including the American badger (Taxidea taxus), red fox (Vulpes vulpes), coyote (Canus latrans), and grey fox (Urocyon cinereoargenteus). Avian species that breed or forage in this type of annual grassland include the western meadowlark (Sturnella neglecta), savannah sparrow (passerculus sandwichensis), burrowing owl (Athene cunícularia), barn owl (Tyto alba), golden eagle (Aquila chrysaetos), and red-tailed hawk (Buteo jamaícensis). Reptile species common to annual grassland habitats include the western fence lizard (Sceloporus occidentalis) and gopher snake (Pituoprns melanoleucus). In addition, amphibian species including the California red-legged frog (Rana aurora draytonii) and California tiger salamander (Ambystoma californiense) can utilize annual grasslands for upland and migratory habitat. Riparian Woodland. Riparian woodland exists along Tassajara Creek within the Project area. This includes only riparian woodland that is not under protection of the TCMZ, and could be impacted by the construction of two bridges spanning Tassajara Creek. Valley oak (Quercus lobata), box elder (Acer negundo), and willows (SaIix spp.) dominate the overstory of this woodland and reach heights up to approximately 50 feet. The understory includes non-native grasses, and riparian species in the creek bed include willows, cattail (Typha spp.), and bulrush (Scirpus acutus). The creek lies 20-50 feet below the surrounding lands in a deeply incised channel with bluff-like banks. In some locations this channel reaches widths greater than approximately 300 feet. The riparian woodland within the Project area and along Tassajara Creek in the TCMZ provides abundant habitat for a diverse range of wildlife species. Many resident and Dublin Ranch West Draft Supplemental EIR Page 48 City of Dublin November 2004 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I migrant avian species, mammals, and riparian and aquatic associated species would be expected along this corridor. Dense brush provides cover for species migrating through this area, and tree canopies provide habitat for nesting and wintering species. Common avian species include the chestnut-backed chickadee (Poecile rufescens), oak titmouse (Baeolophus inornatus), bushtit (psaltriparus minimus), song sparrow (Melospiza melodia), woodpeckers (Picoides sp.), towhees (Pipilo sp.), and mourning dove (Zenaida macroura). Neotropical migrants may also be found in this riparian woodland during spring and fall months (including warblers, vireos, and flycatchers), and winter migrants include the ruby-crowned kinglet (Regulus calendula) and Townsend's warbler (Dendroica townsendii). Several species of raptors would be likely to nest in this area due to the proximity to foraging habitat and presence of large trees. Amphibian and reptile species including the pacific tree frog (Hyla regilla), western toad (Bufo borealis), California red- legged frog, common garter snake (Tharnnophis sirtalis), and alligator lizard (EIgaria multicarinata) are also likely to be found along the riparian corridor. Developed. A number of ranch-related structures including a trailer, barn, and several homes exist between Tassajara Road and Tassajara Creek. Vegetation in this area is sparse, located between structures, and dominated by ripgut brome and other exotic annuals such as yellow starthistle, and Russian thistle (Salsola tragus). In addition, a number of large eucalyptus trees (Eucalyptus globulus) are growing around the developed portions of the site. Wildlife species associated with developed areas include city pigeons (rock pigeon, Columba livia), house sparrow (Passer domesticus), house mice (Mus musculus), and other species adapted to human structures and disturbance. The eucalyptus trees provide potential nesting habitat for rap tars, and day roosting sites for barn owls. Aquatic Habitat. The aquatic habitat within Tassajara Creek consists of areas of seasonal and perennial open water, as well as wetland areas vegetated by aquatic plants and emergent vegetation along the margins of the creek. A report identifying Waters of the U.s. on the Wallis Property (HfH 2000) identified wetlands along Tassajara Creek near the proposed southern bridge crossing and along the tributary waters of Tassajara Creek, both above and below the ordinary high water mark (OHW) (H.T. Harvey & Associates 2002). The report also identified a single isolated seasonal wetland within the 11.6-acre area located in Contra Costa County, north and outside of the Dublin Ranch West area boundary. Few aquatic plants are found in the shaded portions of the aquatic habitat, but areas exposed to sun are generally occupied by algae and mosquito fern (Azolla jiliculoides) (H.T. Harvey & Associates 2002). Portions of Tassajara Creek that flow more slowly, such as near the proposed southern crossing, support emergent wetland vegetation such as cattails and hard-stem bulrush. Other wetland plant species observed in vegetated portions of the aquatic habitat include mugwort (Artemesia douglasiana), watercress (Rorippa nasturtium-aquatica), salt grass, rabbit's-foot grass (Polypogon monspeliensis), and iris-leaved rush (¡uncus xiphioides) (2002). Tassajara Creek provides breeding habitat for a number of amphibian species and probably supports an assemblage of freshwater fish including mosquito fish (Gambusia affinis), California roach (Lavinia symmetricus), bluegill (Lepomis macrochirus), and three- spine stickleback (Gasterosteus aculeatus). Amphibian species that may use Tassajara Dublin Ranch West Draft Supplemental EIR Page 49 City of Dublin November 2004 · California Natural Diversity Database (CNDDB) records (CDFG 2004) for the Livermore 7.5 minute USGS quadrangle and the eight surrounding USGS quadrangles · U. S. Fish and Wildlife Service (USFWS) Quadrangle Species Lists (USFWS 2004) for the Livermore quadrangle · CNPS Electronic Inventory records (CNPS 2004) for the Livermore 7.5 minute USGS quadrangle and the eight surrounding USGS quadrangles, as well as for CNPS List 4 species in Alameda County · California Department of Fish and Game (CDFG) publication "California's Wildlife, Volumes I-III" (Zeiner et al. 1990) · CDFG publication" Amphibians and Reptile Species of Special Concern in California" (Jennings and Hayes 1994) I I I I I I I I I I I I I I I I I I I Creek as a breeding location include the pacific tree-frog, western toad, California red- legged frog, and California tiger salamander. In addition, western pond turtle (Clemmys marmorata) is found within Tassajara Creek. Special Status Species and Habitats, Wetlands Research Associates, Inc:. (WRA) biologists conducted a literature review including database searches for known occurrences of special status species and habitats in the greater Dublin area. The following sources were reviewed to determine which special status plant and wildlife species have been documented to occur in the vicinity of the Project area: WRA biologists conducted a site visit to evaluate the habitat conditions present within the Project area and to determine the potential for special status species and/ or habitats to occur on-site. In addition, the following reports p were reviewed and, where appropriate, incorporated herein: · Dublin Ranch West Biological Resources Report (2002) . California Tiger Salamander 2003-2004 Site-Specific Pitfall Trap Survey Summary (2004) · Dublin Ranch West Rare Plant Surveys Report (Summer 2Q02-Summer 2003) (2003b) Based on an analysis of the above information, special status plants and wildlife known to occur, or with potential to occur, in the Project area are described below and summarized in Table 6. Special Status Species: Botanical. The Eastern Dublin EIR (1993) evaluated 12 special status plant species: large-flowered fiddlenec:k (Amsinckia grandiflora), hispid bird's beak (Cardylanthus mollis sSE. hispidus), palmate-bracted bird's-beak (Cordylanthus palmatùs), Hoover's cryptantha (Cryptantha hoaven), Mt. Diablo buckwheat (Eriagonum truncatum), diamond-petaled California poppy (Eschschalzia rhombipetala), stinkbells (Fritillaria agrestis), fragrant fritillary (Fritillaria liliacea), Great Valley gumplant (Grindelia camparum var. parviflara), Contra Costa goldfields (Lasthenia ronjugms), Lobb's aquatic buttercup (Ranunculus lobil), and caper-fruited tropidocarpum (Trapidacarpum capparideum). Of Dublin Ranch West Draft Supplemental EIR Page 50 City of Dublin November 2004 I I I I I I I I I I I I I I I I I I I those 12 species, the great valley gumplant is no longer listed as a California Native Plant Society (CNPS) rare plant species and is therefore not considered in this Supplement. In their 2002 Biological Resources Report, H.T. Harvey & Associates concluded that the Dublin Ranch West area had the potential to support 15 special status plant species: large-flowered fiddleneck (Amsinkia grandiflora), bent-flowered fiddleneck (Amsinckia lunaris), alkali milk vetch (Astragalus tener var. tener), heartscale (Atriplex cordulata), brittlescale (Atriplex depressa), San Joaquin spearscale (Atriplex joaquinuma), big-scale balsamroot (Balsamorhiza macrolepis var. macrolepis), big tarplant (Blepharizonia plumosa ssp. plumosa), Congdon's tarplant (Centromadia parryi ssp. congdonil), Livermore tarplant (Deinandra bacigalupii), recurved larkspur (Delphinium recurvatum), diamond-petaled California poppy, Diablo heliantheila (Helianthella castanea), showy madia (Madia radiata), and adobe sanicle (Sanicula maritima). Surveys were conducted by HTH in June 2001, September 2002 and in March, April and May 2003 to determine the presence or absence of these 15 plant species on the Dublin Ranch West site (HTH 2003b). Only one special status plant species, Congdon's tarplant (a Federal Species of Concern, and a CNPS List IB species), was found within tne Dublin Ranch West area; approximately 3,000 individuals were observed along both sides of Tassajara Creek (predominantly east of the creek) in alkaline grassland areas (H.T. Harvey & Associates 2002). This species, not included in the 1993 Eastern Dublin EIR, is described in further detail below. Table 6 shows 29 special status plant species that have at least some potential to occur within the Project area. This table includes 11 of the12 species identified in the 1993 Eastern Dublin EIR, with the exception of great valley gumplant (no longer listed), plus an additional 18 species that have some potential to occur in the Dublin Ranch West area. Surveys conducted previously by HTH were timed to occur within the blooming periods of all of these 29 species and only one special status plant species was reported to occur on-site as a result of these surveys (Congdon's tarplant) (HTH 2003b). Co~don's tat:plant. Congdon's tarplant is an annual herb that grows in valley and foo 'il grasslands throughout the greater Bay Area and coastal California, from San Luis Obispo County north to Solano County. It is a federal species of concern and is on CNPS List IB (plants that are endangered, threatened, or rare in California). Protocol- level, blooming period surveys for Congdon's tarplant were conducted by H.T Harvey and Associates in June, 2001, and September, 2002. An estimated 500 plants occupying approximately four acres were located (see Exhibit 14) south of the homestead area in the southern portion of the site (HTH, 2002). An additional estimated 2,500 plants, occupying approximately five acres, were located in a series of gullies between Tassajara Creek and Tassajara Road that drain into Tassajara Creek, north of the homestead area (HTH, 2002). Three additional small patches of Congdon's tarplant were observed west of Tassajara Creek, together consisting of approximately 100 individuals (H1H, 2003). Sensitive Plant Communities and Habitats. Natural corrununities considered sensitive are those identified in local or regional plans, policies, regulations, or by CDFG. CDFG ranks sensitive communities as 'threatened' or 'very threatened' and keeps records of their occurrences in its Natural Diversity Database (CNDDB). Impacts to sensitive Dublin Ranch West Draft Supplemental EIR Page 51 City of Dublin November 2004 natural communities identified in local or regional plans, policies, regulations, or by the CDFG or USFWS must be considered and evaluated under the California Environmental Quality Act (California Code of Regulations: Title 14, Div. 6, Chap. 3, Appendix G). Some plant communities and habitats, such as wetlands and riparian habitat, are also afforded protection under applicable federal, state, or local regulations, and are generally subject to regulation, protection, or consideration by the Corps, Regional Water Quality Control Board (RWQCB), CDFG, and/ or the USFWS. Based on the CNDDB search for the Livermore USGS quadrangle and eight surrounding quadrangles, seven sensitive plant communities (or habitats) were reported as occurring in the Project area vicinity: Alkali Meadow, Alkali Seep, Cismontane Alkali Marsh, Northern Claypan Vernal Pool, Sycamore Alluvial Woodland, Valley Needlegra5s Grassland, and Valley Sink Scrub. None of these sensitive plant communities were determined to be present within or adjacent to the Dublin Ranch West area, as the plant species composition and other features (such as soil type or level of soil moisture) of the plant communities observed on-site did not adequately match the descriptions of these seven sensitive communities as given in the Preliminary Descriptions of the Terrestrial Natural Communities of California (Holland 1986). However, the Riparian Woodland and Aquatic Habitat within the Dublin Ranch West area are considered sensitive habitats as they are regulated by federal and state agencies, including CDFG, the Corps, and the RWQCB. ~ecial Status Specie¡;: Wildlife. The Eastern Dublin EIR (1993) evaluated 27 special-status wildlife species. Fifteen of these species still have state or federal special status, as identified in Table 6. Nine of these species no longer have state or federal special status, or there is no suitable habitat in the Dublin Ranch West area. These nine species include American badger, Ricksecker's water scavenger beetle, curved-foot hygrotus diving beetle, bay checkerspot butterfly, Callippe silverspot butterfly, Bridges' coast range shoulderband, San Francisco forktail damselfly, Lum's micro-blind harvestman and California linderiella. In addition to the 27 special status wildlife species addressed in the Eastern Dublin EIR, another 34 special status species were reviewed based on the recent literature review conducted by WRA. Table 6 provides the current listing status, species description, and potential for occurrence for all 61 special status wildlife species, including the 27 species addressed in the 1993 Eastern Dublin EIR. Of these species, six are knOWIl to occur on site, and another 11 have a moderate or high potential for occurrence. These species are discussed in greater detail below. The Project area has been surveyed for special status wildlife species by both HTH (2002, 2004), and other consulting companies (San Joaquin Kit Fox, Vulpes f1/4crQtis mutica, surveys by BioSystems Analysis, Inc. cited by H.T. Harvey). HTH (2002) reports three separate surveys (using three different agency protocols) for San Joaquin kit fox, four surveys for special-status reptile and amphibian species (including California red- legged frog and western pond turtle) from 1993-2001, a protocol-level California tiger salamander survey in 2003-2004, a protocol-level burrowing owl survey in 2001, and a rec:onnaissance-levelloggerhead shrike, California horned lark, yellow warbler, pallid bat, American badger, and nesting raptor survey in 2001. The results of these surveys are discussed in more depth for specific species below. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 52 November 2004 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I Threatened and Endangered Wildlife Species California Red-Legged Frog (Raw aurora dTl.wtonizJ. California red-legged frog (CRLF) can use virtually any aquatic system with a permanent water source for breeding habitat, regardless of vegetation cover characteristics. CRLF often disperse from their breeding habitat to utilize various aquatic, riparian, and upland aestivation habitats in the summer. However, it is also common for individuals to remain in the breeding area on a year-round basis. CRLF can be encountered living within streams at distances exceeding 1.8 miles from the breeding site and have been found further than 328 feet from water in adjacent dense riparian vegetation, but they typically remain within 200 feet of water. During periods of wet weather, CRLF can move overland, usually at night. Movements of about one mile are possible over the course of a wet season. Frogs will make long-distance straight-line and point-to-point movements rather than using corridors for moving between habitats. Also, frogs can move without apparent regard to topography, vegetation type, or riparian corridors. The Eastern Dublin EIR identified increased sedimentation, increased vehicular traffic, reduction of potential habitat, introduced predators (dogs and cats associated with residential development), and direct mortality from construction as potentially significant impacts to CRLF populations (1M 3.7/F). Since approval of the 1993 Eastern Dublin EIR, the CRLF has been listed as a threatened species under the federal Endangered Species Act, and critical habitat was designated, and later remanded. The Project area is included in the USFWS re--proposed Critical Habitat (69 FR 19619, April 13, 2004). According to the critical habitat rule, CRLF critical habitat includes: (1) "essential aquatic habitat," which consists of two or more suitable aquatic breeding sites located within 1.25 miles of each other; (2) "associated upland," which consists of upland areas within 300 feet of essential aquatic habitat; and (3) "dispersal habitat," which consists of any habitat connecting essential aquatic habitat locations that is free of physical or other barriers and is at least 300 feet wide (Federal Register, March 13, 2001). HTH (2002) found Califonùa red-legged frogs in a number of locations along Tassajara Creek, and concluded that the primary constituent elements of CRLF critical habitat (aquatic habitat, associated upland habitat, and dispersal habitat connecting aquatic habitat) are present on or adjacent to the Dublin Ranch West area. In addition, I-m--I relocated a number of CRLF from elsewhere on the Dublin Ranch West portion of the Project site into Tassajara Creek, in anticipation of management as part of the Tassajara Creek Management Zone. The Tassajara Creek Management Zone refers to a portion of the Dublin Ranch West area, not included in the project area, which will be managed for the preservation and enhancement of wildlife habitat. CRLF are known to occur within dispersal distance of Tassajara Creek both east of the Dublin Ranch West area along the Moller tributary to Tassajara Creek (J.Dreier, pers. comm.), and to the west of the Dublin Ranch West area (CNDDB 2004). HTH (2002) hypothesized that most CRLF movement and activity would take place within the Dublin Ranch West Draft Supplemental EIR Page 53 City of Dublin November 2004 deeply incised banks of Tassajara Creek, due to limited CRLF access points in and out of the drainage. However, dispersal between the Dublin Ranch West area and two off-site ponds to the west is considered possible from points along Tassajara Creek where the banks are more gradual. The two off-site ponds have been documented to support CRLF (CDFG 2004) and are within 1.25 miles of Tassajara Creek, which is the minimum distance given in the critical habitat rule that is required between two breeding sites for dispersal habitat to be considered present. See Exhibit 15, CalifoITÚa red-legged frog habitat on the Project site. San Toaquin Kit Fox (Vulpes mo.crotis mutica). San Joaquin kit fox (SJKF) inhabit grasslands and scrublands, many of which have been extensively modified by humans. Their diet consists of small mammals, ground-nesting birds, insects, and vegetation (primarily grass). SJKF construct dens in loose soil for housing and protection and can also enlarge or modify burrows constructed by other animals or den in human-made structures, such as culverts, abandoned pipes, and banks in roadbeds. Prior to 1930, SJKF inhabited most of the San Joaquin Valley from southern Kern County north to eastern Contra Costa County and eastern Stanislaus County. By 1930 the SJKF range had been reduced by more than half, with the largest remaining portion being in the western and southern portions of the Valley. The kit fox population is fragmented, particularly in the northern part of the range. While there is limited historical information on kit fox populations in eastern Alameda County, recent field surveys have located a number of kit foxes in eastern Alameda County (CNDDB 2004). A number of potentially significant impacts to SJKF populations were identified in the 1993 Eastern Dublin EIR including direct mortality from increased traffic, potential adverse affects of domestic dogs, harm from rodent control poisons, reduction in the availability of prey species and den sites, and the destruction of den sites or mortailty of foxes during construction (IM3.7fD). Since certification of the Eastern Dublin EIR, the USFWS has updated its recommendations for survey protocols and protection measures (USFWS 1997 and 1999). A number of surveys for kit fox have been conducted in the Eastern Dublin area (H.T. Harvey & Associates 1997a) and the adjacent North Livermore Valley (H.T. Harvey & Associates 1997b). None of these surveys detected kit fox with the exception of a single kit fox detected on two separate nights while spotlighting approximately six miles east and five miles north of the Dublin Ranch West area in Contra Costa County on Morgan Territory Road. Despite more intense efforts to detect kit fox in the Eastern Dublin and North Livermore Valley areas since 1997, none has been detected. Based on negative results within the Eastern Dublin area and the surrounding areas, kit fox appear to be absent from the Eastern Dublin area (see analysis presented in H.T. Harvey & Associates 1997c). I I I I I I I I I I I I I I I I I I I Alameda Whipsnake (Masticophus latera/is eUTjlxanthusJ. Alameda whipsnake is a slender, fast-moving, diurnal snake with a broad head, large eyes, and slender neck found primarily in areas that support scrub communities, including mixed chaparral, chamise-redshank chaparral, coastal scrub, and annual grassland and oak woodlands that lie adjacent to scrub habitats. Within these plant communities, specific habitat features needed by whipsnakes include, but are not limited to, small mammal burrows, Dublin Ranch West Draft Supplemental EIR Page 54 City of DUblin November 2004 I I I I I I I I I I I I I I I I I I I rock outcrops, talus, and other forms of cover to provide temperature regulation, shelter from predators, egg laying sites, and winter hibernaculum. Many of these same elements are important in maintaining prey species. The Eastern Dublin EIR identified impacts to Alameda whipsnake as less than significant due to the lack of suitable habitat (1M 3.7/E). Since certification of the Eastern Dublin ElR, the Alameda whipsnake has been federally-listed as threatened under the ESA (USFWS, 1997). The spedes has been listed as threatened under the California Endangered Species Act since 1971. In October 2000, the USFWS designated critical habitat for this species, however, the Project area does not occur within the designated critical habitat. This designation was voided in May 2003. Appropriate habitat for this species does not occur in Eastern Dublin, including the Project area. Bald Eagle rHaliaeetus leucoce:phalus). Bald eagles require large bodies of water, or free- flowing rivers with abundant fish and adjacent snags or other perches. Nests are typically in large, old-growth, or dominant live trees with open branchwork. Since certification of the Eastern Dublin EIR, the bald eagle was reclassified from federally endangered to threatened. It remains state~listed as endangered, as identified in the Eastern Dublin EIR. The bald eagle also is protected under the federal Bald Eagle Protection Act. The historic breeding range of the bald eagle in California extended from southern coastal areas through much of the central and northern portions of the state. The Project area provides very limited suitable nesting habitat for bald eagles because there are no appropriate cliffs and very few trees for nesting and no foraging habitat. Peregrine Falcon (Falco peregrinus anatum). Peregrine falcon are crow-sized rap tors that typically breed near wetlands, lakes, rivers, or other water on high cliffs, banks, dunes, or mounds. Typical foraging habitat is located near bodies of water in open areas with cliffs and canyons nearby for cover and nesting. Potential impacts to the peregrine falcon were considered insignificant in the 1993 Eastern Dublin EIR due to the lack of appropriate habitat. Since certification of the Eastern Dublin EIR this species was federally de-listed (August 25, 2000) but remains state-listed as endangered. Historic nesting locations are known from the region north of the Eastern Dublin area. The Project area does not contain suitable cliffs for nesting and does not represent important foraging habitat for the peregrine falcon. California Ti¡;er Salamander (Amb.ystoma cal{forniense). California tiger salamander (CIS) use vernal pools, stockponds, or other seasonal water bodies for breeding habitat and require nearby ground squirrel or gopher burrows for aestivation habitat. CTS adults may migrate up to 1.2 miles from their aestivation sites to the breeding ponds, and juveniles have been observed to migrate up to one mile from breeding ponds to aestivation areas (Shaffer et a!., 1992). The distance between the aestivation sites and breeding ponds depends on local topography, vegetation, and the distribution of ground squirrel or other rodent burrows. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 55 November 2004 The 1993 Eastern Dublin EIR identified similar impacts to CTS as would be expected for CRLF including increased sedimentation in potential breeding habitat, increased vehicular traffic, reduction of potential habitat, introduced predators (dogs and cats associated with residential development), and direct mortality from construction. These impacts were considered potentially significant (1M 3.7/ G). Since approval of the 1993 Eastern Dublin EIR, the California tiger salamander has been listed as threatened and critical habitat has been designated (USFWS 2004a, Federal Register 69:47211-47248, August 4, 2004 and USFWS 2004b, Federal Register 69:48569- 48649, August 10, 2004). All of the Project area to the west of Tassajara Creek is within critical habitat Unit 18 of the Central Valley Region. Recent surveys for CTS on the Dublin Ranch West portion of the Project area resulted in the capture of 273 salamanders (HrH, 2004). It can be concluded from this study that the entire Dublin Ranch West property may be occupied at times by CTS. Based on trap locations and results, it appears that the primary breeding location for these salamanders is a stock pond located 600 feet west of the northwest portion of the Dublin Ranch West area in the Parks Reserve Forces Training Area. HTH (2004) reported that no CIS breeding occurs within the Dublin Ranch West property and that CIS use the site primarily for aestivation and migration. However, no larval surveys were conducted in Tassajara Creek within the Dublin Ranch West area, and there is potential for CTS to use the creek as a breeding location. Larval surveys have been conducted along Tassajara Creek downstream of this site in 1993,1995,1998, and 2000, and no CIS larvae were found during any of those surveys (HTH pers com). In addition to CTS trapping, HTH installed a passive, one-way CIS barrier along the western edge of the Dublin Ranch West property to prevent CIS trapped and released to the west of the barrier (in 2003--2004) from returning into the Dublin Ranch West property, and to allow CIS remaining in the Dublin Ranch West property to access the known breeding pond northwest of the site. The barrier was installed in 2003, and is currently in place and presumed to be operational. Invertebrates. The 1993 Eastern Dublin EIR identified potentially significant impacts to special status invertebrates including the longhorn fairy shrimp (Branchínecta longiantenna), vernal pool fairy shrimp (Branchínecta lynchi), and eight other species. Since certification of the 1993 Eastern Dublin EIR, the longhorn fairy shrimp and vernal pool fairy shrimp have been federally listed as endangered and threatened, respectively. No habitat for either of these species, or the other eight invertebrate species identified in the 1993 Eastern Dublin EIR exists in the Project area, and the potential for occurrence of any of these invertebrate species is extremely low. California Species of Special Concern and Other Special Status Wildlife Species. These include the following. Prairie Falcon (Falco mericanus1. Prairie falcons typically nest on cliff ledges, and forage over adjacent habitats. Typical foraging habitat includes perennial grasslands, savannahs, rangeland, and desert scrub. Dublin Ranch West Draft Supplemental EIR Page 56 City of Dublin November 2004 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I Impacts to this species identified in the 1993 Eastern Dublin EIR as potentially significant include the reduction in grassland habitat and subsequent reduction in prey availability and disturbance from construction-related activities. There have been no species-specific surveys for Prairie Falcon in the Project area, nor any incidental sightings. The grasslands in the Project area provide suitable foraging habitat for this species, but no nesting habitat is present on-site. White-Tailed Kite Œlanus leucurus). White-tailed kites are associated with annual grasslands, agricultural areas, scrub habitats, wet meadows, and emergent wetlands throughout the lower elevations of California. Nesting generally occurs in shrubs or small trees. It is frequently observed in the San Francisco Bay region. Impacts to this species identified in the 1993 Eastern Dublin EIR as potentially significant include the reduction in grassland habitat and subsequent reduction in prey availability and disturbance from construction-related activities. There have been no species-specific surveys for white-tailed kite in the Project area, nor any reported sightings. The grasslands on the project site provide suitable foraging habitat for this species, and nesting may occur in the oak woodland/ riparian vegetation along Tassajara Creek. Golden Eagle (Aquila chrysaetos). Golden eagles occur in a variety of habitats throughout the San Francisco Bay region. Typical habitat includes rolling foothills with open grasslands, scattered trees, and cliff-walled canyons. Golden eagles nest and roost on secluded cliffs with overhanging ledges or large trees, and prey on lagomorphs and rodents. Impacts to this species identified in the 1993 Eastern Dublin EIR as potentially significant include the reduction in grassland habitat and subsequent reduction in prey availability and disturbance from construction-related activities. A pair of golden eagles has nested successfully east of the Project area since 1990. Radio tracking data of the male eagle shows that while the Dublin Ranch West area is occasionally used for foraging, the primary foraging grounds for this pair are located north and east of the Dublin Ranch West area (HTH, 2002). In addition to foraging habitat, suitable nesting trees are located within the Project area and have the potential to be occupied in the future by dispersing eagles. Northern Harrier (Circus cyaneus). Harriers are residents of annual grasslands, emergent wetlands, and agricultural lands throughout California. They typically nest on the ground in fields, marsh edges, or emergent wetlands. Impacts to this species identified in the 1993 Eastern Dublin EIR as potentially significant include the reduction in grassland habitat and subsequent reduction in prey availability and disturbance from construction-related activities. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 57 November 2004 Dublin Ranch West Draft Supplemental EtR City of Dublin Page 58 November 2004 I I I I I I I I I I I I I I I I I I I There have been no species~specifíc: surveys for harriers on the Project area, nor any incidental sightings. The grasslands on the Project area provide suitable foraging habitat for this species, and nesting may occur in the Project area. Burrowing Owl (Athene cunicularia). The burrowing owl typically favors flat, open annual or perennial grassland or gentle slopes with sparse or nonexistent tree or shrub canopies; however, they also colonize debris piles and old pipes. In California, burrowing owls are found in close association with California ground squirrels (Spermophilus beecheyl]. Burrowing owls exhibit high site fidelity and usually use the abandoned burrows of ground squirrels for shelter and nesting. Impacts to burrowing owls identified in the 1993 Eastern Dublin EIR include loss of suitable nesting and foraging habitat, destruction of nests, harassment, predation by feral dogs and cats, and direct mortality from vehicle collisions (especially during road construction and maintenance). HTH (2002) found no evidence of owl presence, nor saw any owls during protocol-level surveys for burrowing owls conducted in 2001. Burrowing owls are known to occur on adjacent properties north and west of the Dublin Ranch West area (RT. Harvey and Associates, 2002), and numerous ground squirrel burrows, deemed suitable for burrowing owl nesting, were observed within the Dublin Ranch West area. Tricolored Blackbird (Agelaius tricolor). Tricolored blackbird usually nest near freshwater, especially wetlands, in dense cattails or tules, thickets of willow, blackberry, wild rose, or tall herbs. This species requires protected nesting substrate to support colonies of up to 50 pairs. Potential destruction of riparian and freshwater foraging and breeding habitat was considered a potentially significant impact in the 1993 Eastern Dublin EIR. No tricolored blackbirds have been observed in the Project area, and it is highly unlikely that this species would be found breeding in the Project area due to the lack of suitable habitat. Coopers Hawk (Accipiter coQperii). The Eastern Dublin EIR identified impacts to Cooper's hawk as potentially significant (1M 3.7/P). Since certification of the 1993 Eastern Dublin EIR Cooper's hawk have been observed in the Dublin Ranch West area. Cooper's hawk are likely to nest and forage within the Tassajara Creek corridor. Shaw-Shinned Hawk (Accipiter striatus). The Eastern Dublin EIR identified impacts to the sharp-shinned hawk as potentially significant (1M 3.7/P). No additional surveys or sightings have been reported for this species, and it is unlikely that sharp-shinned hawk would nest in the Project area due to the lack of typical habitat. Sharp-shinned hawk may forage along Tassajara Creek. Loggerhead Shrike (Lanius ludovicianus) . A California and Federal Species of Special Concern, loggerhead shrike is a wide-ranging species that occupies open habitats including grassland, scrub, and open woodlands. WRA observed two loggerhead I I I I I I I I I I I I I I I I I I I shrikes in the Project area on July 13, 2004. Suitable nesting habitat exists for this species along Tassajara Creek on the site. Short-Eared Owl (Asia flammeus). The 1993 Eastern Dublin EIR identified impacts to the short-eared owl as insignificant due to lack of appropriate habitat (1M 3.7/ Q). The Project area does not provide suitable nesting habitat for this species, and the species is not known to nest in Contra Costa or Alameda counties, however marginal foraging habitat does exist within the grasslands in the Project area. California Horned-Lark (EremOJlhila alpestris actia). A California Species of Special Concern, California horned lark are ground nesting birds that nest and forage in short- grass prairie, mountain meadow, coastal plain, fallow grain fields, and alkali flats. No homed larks have been observed in the Project area, however HTH (2002) reported that nesting homed larks are known to occur north of the Project area. The grasslands in the Project area provide suitable habitat for this species. Great Blue Heron (Ardea herodias). A California Species of Special Concern, great blue heron nest in large rookeries, usually in a single tree or group of trees. WRA observed one heron in Tassajara Creek on July 13, 2004. Suitable nesting trees occur in the Project area, although no herons are currently known to be nesting in the Project vicinity. Western Pond Turtle (Clemm¡¡s marmorata). Western pond turtles (WPT) are a frequent resident in ponds, marshes, rivers, streams, and irrigation ditches with aquatic vegetation. WPT need basking sites and suitable banks for egg-laying. The 1993 Eastern Dublin EIR identified increased sedimentation, increased vehicular traffic, reduction of potential habitat, introduced predators (dogs and cats associated with residential development), and direct mortality from construction as potentially significant impacts to western pond turtle populations (1M 3.7 IF). WRA observed two western pond turtles in Tassajara Creek on July 13, 2004, and turtles have been observed on a number of occasions during surveys conducted by HTH (2002). Tassajara Creek provides quality turtle habitat, and while western pond turtles are not likely to leave the Tassajara Creek drainage and move into upland areas of the Project area due to the steep incised banks, females may occasionally wander out of the riparian areas in search of nest locations. California Horned Lizard iPhrynosoma coromtumfrontale). The 1993 Eastern Dublin EIR identified impacts to the California horned lizard as insignificant due to their extensive distribution (3.7/ R). Since certification of the Eastern Dublin ErR, the horned lizard has been listed as a fully protected species under the California Fish and Game Code. There is a low potential for occurrence of this species on the Dublin Ranch West area due to marginal habitat and distance to :mown horned lizard locations. No additional surveys or incidental sightings have been reported for this species. Oak Titmouse (Baeolophus inormtus). A USFWS Species of Local Concern, oak titmouse is a common resident of oak woodland habitats that nests in woodpecker holes, natural Dublin Ranch West Draft Supplemental EIR Page 59 City of Dublin November 2004 cavities, or nest boxes. WRA observed an oak titmouse in the Project area on July 13, 2004. Suitable foraging and nesting habitat exists for this species along Tassajara Creek. Yuma Myotis (MJlotis Jlumanensis). A California and Federal Species of Special Concern, yuma myotis bats are known to live in disturbed and developed environments. Yuma myotis roosting locations include buildings, caves, trees, bridges and rock crevices. Potential habitat for this species exists in the Dublin Ranch West area including potential roosting locations in old ranch-buildings on site. IMPACTS AND MITIGATIONS FROM THE EASTERN DUBUN EIR The Eastern Dublin EIR included a comprehensive assessment of habitat and wildlife resources in the EIR planning area. The Eastern Dublin EIR identified potential impacts related to the general effects of potential development in Eastern Dublin including direct habitat loss, indirect habitat loss due to vegetation removal for construction and development activities, and loss or degradation of sensitive habitat (Impacts 3.7/ A, B, and C). The Eastern Dublin EIR also identified potential impacts related to wildlife species such as San Joaquin kit fox, California red-legged frog, California tiger salamander, and others (Impacts 3.7/D - S). Raptor electrocutions, associated with new high-voltage power lines, were addressed in depth in the 1993 Eastern Dublin ElR and included a number of mitigation measures (MM 3.7/26.0a-d). Mitigation measures were adopted to, among other things, prepare resource management plans, avoid development in sensitive areas and revegetate disturbed areas (generally Mitigation Measures 3.7/ 1.0 ~ 28.0). All mitigation measures adopted upon approval of the Eastern Dublin EIR continue to apply to the proposed Project. SUPPLEMENTAL IMPACTS AND MITIGATION MEASURES Significance Criteria. The project's impacts to biological resources would be considered significant if the project results in the actions or outcomes listed below. These significance criteria are based on the CEQA Guidelines' (CCR Title 14, Div. 6, Ch. 3) recommended tools for detennining the potential for significant environmental effects, including the model Initial Study checklist (Appendix G of the Guidelines) and CEQA's mandatory findings of significance (Guidelines sec. 15065). The proposed project would have a significant supplemental impact on biological resources if the following impacts have the potential to occur but were not analyzed in the 1993 Eastern Dublin EIR, or are substantially more severe than analyzed in the Eastern Dublin EIR: · Substantially degrade the quality of the environment; . Substantially reduce the habitat of a fish or wildlife species; · Cause a fish or wildlife population to drop below self-sustaining levels; · Threaten to eliminate a plant or animal community; · Reduce the number or restrict the range of an endangered, rare or threatened species; · Eliminate important examples of the major periods of California history or prehistory; · Have a substantial adverse effect, either directly or indirectly or through habitat modification, on any species identified as a candidate, sensitive, or special status Dublin Ranch West Draft Supplemental EIR Page 60 City of Dublin November 2004 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I species in local or regional plans, policies, or regulations, or by the CDFG or USFWS; · Have a substantial adverse effect on any riparian habitat or other sensitive natural community identified in local or regional plans, policies, regulations or by the CDFG or USFWS; · Have a substantial adverse effect on federally protected wetlands as defined by Section 404 of the Oean Water Act (including, but not limited to, marsh, vernal pool, coastal, etc.) through direct removal, filling, hydrological interruption or other means; · Interfere substantially with the movement of any native resident or migratory fish or wildlife species or with established native resident or migratory wildlife corridors, or impede the use of native wildlife nursery sites; · Conflict with any local policies or ordinances protecting biological resources, such as a tree preservation policy or ordinance; · Conflict with the provisions of an adopted Habitat Conservation Plan. Natural Community Conservation Plan, or other approved local, regional, or state habitat conservation plan. Regulatory Setting. Biological resources are regulated by the following: Federal Endangered Species Act. The federal Endangered Species Act (FESA) protects listed species from hann or "take" which is broadly defined as to harass, harm, pursue, hunt, shoot, wound, kill, trap, capture, collect, or attempt to engage in any such conduct. Take can also include habitat modification or degradation that results in death or injury to a listed species. An activity can be defined as "take" even if it is unintentional or accidental. listed plant species are provided less protection than listed wildlife species. Listed plant species are legally protected from take under FESA if they occur on federal lands or if the project requires a federal action, such as a Section 404 fill permit. The U.s. Fish and Wildlife Service (USFWS) has jurisdiction over federal-listed threatened and endangered species under the FESA. The USFWS also maintains lists of proposed and candidate species. Species on these lists are not legally protected under the FESA, but may become listed in the near future and are often included in their review of a project. California Endangered Species Act. The California Endangered Species Act (CESA) prohibits the take of any plant or arrimal listed or proposed for listing as rare (plants only), threatened, or endangered. In accordance with the CESA, CDFG has jurisdiction over state-listed species (California Fish and Game Code 2070). Additionally, the CDFG maintains lists of "species of special concern" that are defined as species that appear to be vulnerable to extinction because of declining populations, limited ranges, and/ or continuing threats. California Environmental Ouali1;y Act. Section 153S0(b) of the California Environmental Quality Act (CEQA) Guidelines provides that a species not listed on the federal or state lists of protected species may be considered rare or endangered if the species can be shown to meet certain specified criteria. These Dublin Ranch West Draft Supplemental EtR City of Dublin Page 61 November 2004 Dublin Ranch West Draft Supplemental EIR City of Dublin Page 62 November 2004 I I I I I I I I I I I I I I I I I I I criteria have been modeled after the definitions in FESA and CESA and the section of the California Fish and Game Code dealing with rare or endangered plants or animals. This section was included in the guidelines primarily to deal with situations in which a public agency is reviewing a project that may have a significant effect on a species that has not yet been listed by either the USFWS or CDFG. Oean Water Act. Under Section 404 of the Clean Water Act, the Corps is responsible for regulating the discharge of fill material into waters of the United States. Waters of the U.s. and their lateral limits are defined in 33 CPR Part 328.3 (a) and include streams that are tributary to navigable waters and their adjacent wetlands. Wetlands that are not adjacent to waters of the u.s. are termed "isolated wetlands" and, depending on the circumstances, may also be subject to Corps jurisdiction. California Water Ouality and Waterbody Regulatory Programs. Pursuant to Section 401 of the federal Oean Water Act, projects that are regulated by the Corps must obtain water quality certification fr:om the RWQCB. This certification ensures that the Project will uphold state water quality standards. The RWQCB may impose mitigation requirements even if the Corps does not. The CDFG exerts jurisdiction over the bed and banks of watercourses and waterbodies according to provisions of Section 1601 to 1603 of the Fish and Game Code. The Fish and Game Code requires a Streambed Alteration Agreement for the fill or removal of material within the bed and banks of a watercourse or waterbody and for the removal of riparian vegetation. The Federal Migratory Bird Treaty Act (16 U.S.c., Sec. 703, Supp. I, 1989) prohibits killing, possessing, or trading in migratory birds except in accordance with regulations prescribed by the Secretary of the Interior. This act encompasses whole birds, parts of birds, and bird nests and eggs. Most native bird species in the Dublin Ranch West area are covered by this Act. The Califomia Native Plant Society (CNPS), a non-governmental conservation organization, has developed lists of plant species of concern in California. Vascular plants included on these lists are defined as follows: list lA List IB List 2 Plants considered extinct. Plants rare, threatened, or endangered in California and elsewhere. Plants rare, threatened, or endangered in California but more common elsewhere. Plants about which more information is needed - review list. Plants of limited distribution-watch list. List 3 list 4 Although the CNPS is not a regulatory agency and plants on these lists have no formal regulatory protection, plants appearing on List IB or list 2 are, in general, considered to meet CEQA's Section 15380 criteria and adverse effects to these species are considered significant. I I I I I I I I I I I I I I I I I I I The Dublin Heritag-e Tree Ordinance (City of Dublin Zoning Ordinance Chapter 8.72:4 [revised 11/02]) states that existing mature bay, çypress, maple, oak, redwood, and sycamore trees shall be preserved in zoning districts if they are over 24 inches in diameter measured 4 feet 6 inches above natural grade. However, trees meeting the above criteria may be removed on a limited basis with the permission of the Director upon submittal of an arborist's report which determines that the tree is in poor health and not likely to survive; if the trees constitute a high fire hazard or a threat to persons, structures, or property; or. if they impede publk works projects. Trees to be removed shall be shown on the Final Landscaping and Irrigation Plan and detailed on a tree inventory chart on that plan. Supplemental Impacts and Mitigation Measuxes. The following supplemental biological resource impacts and mítigation measures are identified in this DSEIR. slWplementallmpact BIO-1. Impacts to California tiger salamander. Implementation of the Dublin Ranc:h West development Project would result in the permanent loss of approximately 110 acres of California tiger salamander aestivation habitat, which is within proposed critiçal habitat unit 18 (Central Valley Region). All areas of upland habitat on the Dublin Ranch West property (non~native grassland and riparian woodland) are assumed to be occupied by CIS based on the results of the 2003/2004 trapping effort (HTB, 2004). Grading, road and trail construction, and building will likely result in the destruction of occupied burrows and in direct loss of individual CIS (the number of CIS that will be underground during construction and will be killed is impossible to estimate). CTS are known to breed in a sto<:k pond located 600 feet west of the northwest portion of the Project area in the Parks Reserve Forces Training Area, and may use Tassajara Creek for breeding based on CIS captures near the creek (HTH, 2004) and on CIS breeding locations in a tributary to Tassajara Creek (WRA, 2003). In addition, if salamanders are breeding in Tassajara Creek, this population would become nearly isolated from the breeding population in the pond northwest of the Project area. The two proposed bridges spanning Tassajara Creek would çompletely span the creek and would not result in the permanent plaçement of fill or degradation of aquatiç habitat within the creek. However, temporary fill of some aquatic habitat is antidpated during bridge construction, which may result in a degradation of potential CIS aquatiç breeding habitat and direct loss of CIS individuals. Indirect Project impacts following development construction would include mortality of salamanders migrating across the development areas due to vehicle strikes, human disturbance and harassment or mortality from introduced predators in preserved areas (dogs, çats, raccoons associated with development, ek). Loss of CTS aestivation habitat, degradation of potential CTS breeding habitat in T assajara Creek, and direct and indirect loss of CIS individuals, would be signifiçant s~lemental impacts since the extent of this impact would be greater Page 63 November 2004 Dublin Ranch West Draft Supplemental EIR City of Dublin Dublin Ranch West Draft Supplemental EIR City of Dublin Page 64 November 2004 I I I I I I I I I I I I I I I I I I I than identified in the 1993 Eastern Dublin EIR. Adherenœ to the following measures will reduce this impact to a less-than- significant level. Supplemental Mitigation Measure SM-BIO-1. A CTS management plan shan be developed by the Project proponents, and approved by the CDFG and the USFWS, prior to construction activities. This measure shan also apply to construction of recreational trails in preserved areas. The Plan will detail how CTS will be managed before and during construction activities and will include the following: a) Installation of a temporary herpetological fence prior to any ground disturbance around the entire development footprint, which shan prevent CTS from entering the construction site and shaIl remain until the permanent fenœ or barrier is installed or the current one-- way barrier is extended and approved for use by the USFWS (SMM- 810-2). A maintenance schedule shall be included for this fencing. b) A trapping and relocation plan that details how aestivating CTS individuals win be adequately relocated from the development footprint and into permanently preserved suitable aestivation habitat. Supplemental Mitigation Measure SM-BIO-2. A permanent herpetological fence or barrier shall be installed around the entire development footprint following construction activities to prevent movement of CTS into the development area. Such fencing shall be designed to allow for movement of larger terrestrial wildlife species, but shall preclude CTS from climbing the fence. With USFWS approval, the one-way barrier currently in plaœ may be extended to meet this mitigation requirement. Supplemental Mitigation Measure SM-BIO-3. CTS larval surveys wiIl be conducted in Tassajara Creek to determine if CTS are using the area for breeding. If CTS are determined to use Tassajara Creek as a breeding location, the CTS management plan will be modified such that appropriate measures are implemented during bridge construction to protect known or potential breeding sites within the creek, and to protect or relocate any CTS individuals that may be present in the temporarily disturbed portions of the creek (as approved by CDFG and USFWS). Supplemental Miti;ation Measure SM-BIO-4. To compensate for the permanent loss of approximately 110 acres of CTS aestivation habitat, the Project proponent will acquire and preserve in perpetuity suitable CTS aestivation habitat at a 1:1 ratio adjacent to preserved, occupied CTS breeding and aestivation habitat and construct a breeding pond, or as required by the USFWS and CDFG. The mitigation aestivation habitat shall be located in the Dublin and Livermore Valley area and shall I I I I I I I I I I I I I I I I I I I exhibit similar characteristics to the habitat lost. In selecting off-site mitigation lands, preference shall be given to preserving one large block of habitat rather than many small parcels, linking preserved areas to existing open space and other high quality habitat, and excluding or limiting public use within preserved areas. Land selected for mitigation shall be permanently preserved through use of a conservation easement or similar method, approved by the USFWS and CDFG, and obtained prior to the issuance of any construction permits. Supplemental Mitigation Measure SM-BID-5. An Open Space Management Plan (or plans, if necessary) shall be prepared for (1) the preserved upland habitats within the Project area, including the approximately 23-acre westem open space area, (2) the private open space area located between the development area and the TCMZ, and (3) for off-site land preserved under measure SMM-BI04. This plan shall include strategies for grassland habitat management to maintain CTS aestivation habitat, including grazing or mowing to encourage ground squirrel use and limiting human access to migratory routes to and from breeding habitats. If grazing is prescribed, the plan shall comply with the Grazing Management Plan for the Eastem Dublin General Plan Amendment Area. For the private open space area adjacent to the TCMZ, the trail development and habitat management measures shall be consistent with the Eastern Dublin Comprehensive Stream Restoration Program (and the Dublin Ranch Tassajara Creek Conservation Area Habitat Management Plan. The Open Space Management Plan shall also address management of the habitats for other special status species that may utilize these areas, including CRLF, burrowing owl and migratory birds. The plan shall include protection measures such as fencing, signage, reduced or indirect lighting, pet control measures, trail use limitations (daytime only), and habitat monitoring and reporting. This plan shall be prepared and approved by USFWS and CDFG prior to construction activities. Supplemental Mitigation Measure SM-BIO-6. A qualified biologist (as identified by the City) shall monitor construction activities to ensure protective measures are implemented and maintained (i.e. fencing is maintained, preserved areas are not disturbed, etc.). The biological monitor shall have the authority to suspend any and all construction activities if protective measures are not properly followed and/or if activities pose an immediate threat to preserved sensitive resources. The biological monitor shall also have the authority to contact CDFG and/or the USFWS to report any mortality of listed species during construction. This measure shall also apply to construction of recreational trails in preserved areas. Supplemental Mitigation Measure SM-BID-7. All Project construction employees shall receive an educational training program that includes information on sensitive species identification and their potential habitat, approved mitigation measures for the Project, and actions Dublin Ranch West Draft Supplemental EIR City of Dublin Page 65 November 2004 DUblin Ranch West Draft Supplemental EIR City of Dublin Page 66 November 2004 I I I I I I I I I I I I I I I I I I I employees should take if a sensitive species is encountered. This measure shall also apply to conatruction of recreational trails in preserved areas. Supplemental Impact BIO-Z. Impacts to California red-legged frog. The Project area is within USFWS re-proposed critical habitat Unit 15 (East Bay- Diablo Range Unit) for the CRLF (69 FR 19619; April 13, 2004). Impacts to CRLF critical habitat would occur during Project development and during construction of two bridges over occupied CRLF breeding habitat in Tassajara Creek, resulting in the permanent loss of approximately nine acres of associated upland habitat and approximately 66 acres of dispersal habitat, as CRLF populations in Tassajara Creek are further isolated from potential breeding locations northwest and southwest of the Project area. Associated upland habitat was determined to be areas within 300 feet of Tassajara Creek, where movement from the creek is considered feasible (where bank slopes are gradual enough to allow for wildlife passage, including an existing dirt road which crosses through the creek), as shown on Exlúbit 15. Dispersal habitat consists of the habitat between these access points to the known breeding habitat in Tassajara Creek and two off-site ponds west of the Project area known to support CRLF (CDFG 2004). The two proposed bridges spanning Tassajara Creek would completely span the creek and would not result in the permanent placement of fill or degradation of aquatic habitat within the creek. However, temporary fill of some aquatic habitat is anticipated during bridge construction, which may result in a degradation of CRLF aquatic breeding habitat. Grading, road and bridge construction, and other construction activities may result in direct loss of CRLF individuals. The Project may also have indirect impacts including mortality of CRLF from vehicles, human disturbance and harassment or mortality from introduced predators within preserved areas (dogs, cats, raccoons associated with development, etc.) from increased disturbance along Tassajara Creek and within the Tassajara Creek Management Zone. Direct loss of CRLF upland and dispersal habitat, and direct and indirect loss of CRLF individuals would be significant sup.plemental impacts, since the extent of CRLF impacts would likely be greater than anticipated in the Eastern Dublin EIR. Adherence to the following measures will reduce this impact to a less-than- significant level. Supplemental Mitig:aûon Measure SM-BID-S. To compensate for the permanent loss of approximately 9 acres of CRLF-associated upland habitat and approximately 66 acres of dispersal habitat (75 acres combined), the Project ahall acquire and preserve in perpetuity upland habitat at a 1.5:1 raûo of preserved to lost habitat or as required by the USFWS in the Tri-Valley Area that exhibits similar characteristics to I I I I I I I I I I I I I I I I I I I habitat lost (similar proximity to established breeding locations, CRLF population densities, etc.). Supplemental Mitigation Measure SM-BIO-9. The following construction-related CRLF avoidance and protection measures shall be followed for development activities within the Project area: a) Prior to construction of the proposed bridges, a map shall be prepared to delineate CRLF breeding habitat, corn;truction and laydown areas, and areas of proposed tempora¡:y fill within Tassajara Creek. Pre-construction surveys within these areas shall be conducted by a qualified biologist (as approved by the City)with appropriate authorization to handle CRLF. If CRLF are found within the construction areas (or other sensitive wildlife species), they shall be immediately moved to undisturbed, preserved portions of Tassajara Creek if authorized in a biological opinion issued by the USFWS for the Project. Construction, laydown, and temporary fill areas shall be fenced appropriately to prohibit CRLF movement into these areas, as supervised and verified by a qualified biologist. Construction activities and access shall be confined to these fenced areas during construction activities. A qualified biologist will monitor the fence and construction activities daily when corn;truction activities are conducted within Tassajara Creek. A biologist with appropriate permits to relocate any CRLF shall be available to the on-site biological monitor if CRLF (or other sensitive wildlife species) are found within the fenced areas during daily construction monitoring; CRLF shall be relocated to undisturbed, preserved portions of Tassajara Creek. b) Prior to grading activities or any ground disturbance within upland habitats, and following insWlation of protective tempora¡:y construction fencin~ a qualified biologist with appropriate authorization to handle CRLF shall conduct pre-construction surveys. If CRLF are found within the construction areas, they shall be immediately moved to undisturbed, preserved portions of Tassajara Creek if authorized in a biological opinion issued by the USFWS for the Project. This measure shall also apply to construction of recreational trails in preserved areas. Supplemental Mitigation Measure SM-BIO-tO. Grading activities should take place during the dry season (as is practicable), since CRLF will be less likely to be present in upland areas during d¡:y months of the year. Supplemental Mitigation Measures BIQ-2, BlO-5, BIO-6 and BIO-7 shall also be applied as mitigation for this impact. Supplemental Impact BIO-3. Impacts to breeding birds. Implementation of the proposed Project may result in a loss of approximately 1.0 Page 67 November 2004 Dublin Ranch West Draft Supplemental EIR City of DUblin Dublin Ranch West Draft Supplemental EIR City of Dublin Page 68 November 2004 I I I I I I I I I I I I I I I I I I I acre of riparian vegetation, oak trees, and other suitable nesting locations for red-tailed hawk, Cooper's hawk, loggerhead shrike, and other species both common and sensitive. In addition, the Project would result in the loss of approximately 110 acres of grassland habitat that provides nesting habitat for sparrows, burrowing owl, California horned lark, and others. Construction activities, trail development and use may also result in noise disturbance to nesting birds, which could result in nest abandonment and mortality of eggs or juveniles. Removal of habitat for these birds, and potential noise impacts to nesting birds, are potentially significant supplemental impacts. Implementation of the following mitigation measures would reduce impacts to a less than significant level. Supplemental Mitigation Measure SM-BIO-ll. Prior to any tree removal or ground diaturbance, a qualified biologist (approved by the City) shall conduct breeding bird surveys throughout the Dublin Ranch West area and mark an appropriate buffer around any nests discovered. Buffers shall be a minimum of 250 feet for raptors (although sensitive raptors such as golden eagles may require a much larger buffed, and between 50 and 100 feet for passerines depending on habitat type (50 feet in dense vegetation, 100 feet in open areas). Pre-construction surveys shall take place throughout the development portion of the Project area, including surveys for grassland birds and birds likely to nest along the Tassajara Creek corridor. Nesting status ahall be monitored by a qualified biologist to determine when nests are no longer active. All activities shall be prohibited within the buffer until after young have fledged and moved out of the nest. This measure shall alao apply to construction of recreational trails in preserved areas. Supplemental MitiJation Measure SM-BIO-12. Vegetation and tree removal shall take place (as much as practicable) outside of the breeding period for most birds (Febmary-Auguat is a broad breeding period that covera most species). This measure shall also apply to construction of recreational trails in preserved areas. Supplemental Mitigation Measures BIO-5, BIQ-6 and BI0-7 would also be applied as mitigation for this impact. Supplemental Impact BI0-4. Impacts to bat species. Implementation of the Project would remove a number of barns, old ranch buildings, and large trees that are potential roosting sites for special status bat species. The destruction of bat roosts used by special status bat spedes is a potentially si~ificant supplemental impact. Adherence to the following measures would reduce this impact to a less~than- significant level. I I I I I I I I I I I I I I I I I I I Supplemental Mitigation Measure SM-BIO-13. Surveys of potential roosting habitat including structures and large trees in the Tassajara Creek bridge crossing areas shall be conducted by a qualified biologist prior to any disturbance of potential roosting sites. If active roosts are discovered, bats would be excluded from those roosting locations by a qualified biologist prior to habitat removal (late summer-early fall). TIrls measure shall also apply to construction of recreational trails in preserved areas. Supplemental Mitigation Measures BI0-5, BIO-6 and BI0-7 would also be applied as mitigation for this impact. Supplemental Impact BIO-5. Impacts to Burrowing Owl. The Project would result in the loss of potential burrowing owl breeding habitat and/ or the disturbance of burrowing owl nests. The loss of occupied burrowing owl nesting habitat and/ or loss of nesting owls is a significant impact. The following measure will reduce this impact to a less-than-significant level. This supplemental mitigation measure has been updated from the 1993 Eastern Dublin EIR. Supplemental Mitigation Measure SM-BIO-14. The following pre- construction survey, avoidance, and/or compensation measures shall be applied for impacts to burrowing owls (this measure shall also apply to construction of recreational trails in preserved areas): a) Pre-construction surveys for burrowing owls shall be conducted by a qualified biologist prior to any ground disturbance between September 1 and January 31. If ground disturbance is delayed or suspended for more than 30 days after the survey, the site should be re-surveyed. If no over-wintering birds are present, burrows should be removed prior to the nesting season. If over-wintering birds are present, no disturbance should occur within 150 feet of occupied burrows. If owls must be moved away from the disturbance area during this period, passive relocation measures must be prepared according to current CDFG burrowing owl guidelines, approved by CDFG, and completed prior to construction. b) If construction is scheduled during the nesting season (Febmary 1 _ September D, pre-construction surveys shall be conducted in the entire Dublin Ranch West area within 30 days prior to construction and within 250 feet of the Dublin Ranch West area prior to any ground disturbance. A minimum buffer (at least 250 feet) shall be maintained during the breeding season around active burrowing owl nesting sites identified in pre-construction surveys to avoid direct loss of individuals. c) If destruction of occupied (breeding or non-breeding season) burrows, or any burrows that were found to be occupied during Dublin Ranch West Draft Supplemental EIR City of Dublin Page 69 November 2004 Dublin Ranch West Draft Supplemental EIR City of Dublin Page 70 November 2004 I I I I I I I I I I I I I I I I I I I pre-construction surveys, is unavoidable, a strategy will be developed to replace such burrows by enhancing existing burrows or creating artificial burrows at a 2:1 ratio on permanently protected lands adjacent to occupied burrowing owl habitat, and will include permanent protection of a minimum of 6.5 acres of burrowing owl habitat per pair or unpaired resident owl. A plan shall be developed and approved by CDFG describing creation or enhancement of burrows, maintenance of burrows and management of foraging habitat, monitoring procedures and significance criteria, funding assurance, annual reporting requirements to CDFG, and contingency and remediation measures. Supplemental Mitigation Measures BIQ-5, BIQ-6 and BIO-7 will also be applied as mitigation for this impact. Supplemental Úl\pact BID-6. Loss of special status plants. The Project would remove approximately 630 individuals of Congdon's tarplant, or approximately five acres of occupied Congdon's tarplant habitat (HTH 2002 and 2003). Trail construction withiri. the private open space area may also impact Congdon's tarplant. The removal of Congdon's tarplant individuals and habitat would result in a significant supplemental impact. Implementation of the following mitigation measures would reduce Supplemental Impact BIN to a less than significant level. Supplemental Mitigation Measure SM-BID-IS. One acre of new occupied habitat for Congdon's tarplant shall be provided for every one acre of existing Congdon's tarplant habitat lost within suitable, on- site preserved habitat (such as the TCMZ). The Project applicant shall develop and implement a detailed Mitigation and Monitoring Plan to fully compensate for impacts to Congdon's tarplant. The plan shall include the mitigation design, methods of salvage of existing seed, maintenance methods (including weed management), monitoring procedures and perfonnance criteria, reporting requirements, and a contingency measure to preserve existing off-site occupied Congdon's tarplant habitat at an equal amount to lost habitat in case of mitigation failure. The Project proponent shall provide a secure funding source (such as a performance bond) for the implementation of the mitigation plan and long-term maintenance and monitoring of the mitigation area. The created mitigation area must be preserved in perpetuity (such as through a permanent conservation easement). The Mitigation and Monitoring Plan must be approved by the City prior to the issuance of grading permits for the Project. Mitigation shall require a minimum of five years of monitoring, and annual monitoring reports shall be provided to the City. I I I I I I I I I I I I I I I I I I I Supplemental Mitigation Measures BI0-5, Blû-6 and -BI0-7 would also be applied as mitigation for this impact. Supplemental Impact BIO-7. Loss of riparian vegetation. The Project would remove approximately 1.0 acre of riparian vegetation along Tassajara Creek to construct the two proposed bridge crossings, and may remove riparian habitat during trail construction in the private open space area. Indirect impacts from bridge and/ or trail construction, such as inadvertent removal of additional riparian habitat or damage to existing riparian habitat, may also occur. In addition, trees subject to the City of Dublin's Heritage Tree Ordinance within the riparian vegetation may be removed and / or damaged during bridge crossing construction. The removal of riparian habitat and Heritage Trees would be considered a significant supplemental impact. Implementation of the following mitigation measures would reduce impacts to a less than significant leveL Supplemental Miti¡ation Measure SM-BIO-16. Riparian habitat removed by the proposed development shall be replaced by the creation of new riparian habitat at a 3:1 ratio (acreage created:acreage removed), subject to the approval of CDFG and the City. The Project applicant shall develop and implement a Riparian Habitat Mitigation and Monitoring Plan to fully compensate for impacts to riparian habitat, including any Heritage Trees. If removal or damage occurs in an area that will not be permanently removed, riparian habitat shall be restored at that location according to the Riparian Habitat Mitigation and Monitoring Plan. The plan shall include the mitigation design, riparian species planting design (utilizing native species found in Tassajara Creek), sources for plant materials, maintenance methods (including irrigation, deer protection and weed management), monitoring procedures and performance criteria, reporting requirements, and contingency measures in case of mitigation failure. The Project applicant shall provide a secure funding source (such as a performance bond) for the implementation of the mitigation plan and long-term maintenance and monitoring of the mitigation area. The created mitigation area must be preserved in perpetuity (such as through a permanent conservation easement). The measures within the Riparian Habitat Mitigation and Monitoring Plan shall be consistent with the Eastern Dublin Comprehensive Stream Restoration Program (Sycamore Associates, et. aI. 1996b) and the Dublin Ranch Tassajara Creek Conservation Area Habitat Management Plan. The Riparian Habitat Mitigation and Monitoring Plan must be approved by CDFG and the City prior to the issuance of Project grading permits. Mitigation shall require 10 years of monitoring¡ and alU\ual reports shall be submitted to the City and CDFG. Supplemental Mitigation Measure SM-BIO-17. A Tree Removal and Preservation Plan that addresses all trees with a dripline that fail within Dublin Ranch West Draft Supplemental EIR City of Dublin Page 71 November 2004 Page 72 November 2004 I I I I I I I I I I I I I I I I I I I any areas proposed for grading, including trees on the adjacent TCMZ shall be prepaJ:ed by a qualified uborist OJ: fOJ:ester. The Plan shall pJ:ovide detailed J:ecommendations J:egardmg tree removal and preseJ:Vation methods, including protective fencing around the dripline of preseJ:Ved trees, and shall be submitted to the City for review and acceptance prior to issuance of any Project grading permits. Trees to be removed or protected shall be accurately and clearly delineated on all Project grading plans, including a delineation of the dripline foJ: preserved trees. Supplemental Mitigation Measures BI0-5 and BI0-6 would also be applied as mitigation for this impact. Supplemental Impact BIO-S. TempoJ:ary loss of aquatic habitat The Project may result in the temporary fill of aquatic habitat (wetlands and/ or open water) within Tassajara Creek during construct the two proposed bridge crossings. The temporary fill of aquatic habitat would be considered a significant supplemental impact. Adherence to the following measure will reduce this impact to a less-than- significant level. Supplemental Miti8ation Measure SM-BIO-IS. Aquatic habitat temporarily filled by the proposed development shall be J:estored to pre-Project conditions following completion of bridge construction, subject to the approval of the C01'pS, RWQCB, and CDFG. The Pmject applicant shall develop and implement a Restoration Plan that shall include reasonable measures to avoid and minimize advel'Se effects to the aquatic resources. Such measures may include use of temporary silt and construction fencing to prevent fill beyond the area anticipated, structures to temporarily re-route or avoid any flowing wateJ: in the creek, timing bridge construction activities so that placement and J:emoval of fill can occur in the same dry season (April 15 through October 15), and use of construction mats to prevent permanent impacts to substrates from heavy equipment The plan shall include the type, amount and location of the temporary fill material proposed, a schedule for placement and removal of fill, and the ultimate upland location for the fill material once it has been removed. The plan shall include methods for restoring the area to pre-Project conditions once the temporary fill is removed, including welland and/or riparian species planting design (utilizing native species found in Tassajara Creek), sources for plant materials, maintenance methods (including irrigation, deer protection and weed management), monitoring pJ:ocedures and performance criteria, reporting requirements, and contingency measures in case of mitigation failure. The Project proponent shall provide a secure funding source (such as a perfonnance bond) for the implementation of the mitigation plan and long-tenn maintenance and monitoring of the mitigation area. The Restoration Plan must be Dublin Ranch West Draft Supplemental EIR City of Dublin I I I I I I I I I I I I I I I I I I I approved by the Corps, RWQCB, and CDFG prior to the issuance of Project grading permits. Mitigation shall require five years of monitoring, and annual reports shall be submitted to the permitting agencies. 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"." ~'=2:eQt:B~ iUE-o ="'¡;;;:CI: '- "E U C:~'=E-!::"'C "- g ""..., 13 S=.~iU"Ç!E-_ " "'.- "" 1! ~ .'- !i: " 8.-!!a e ~] Jj ~¡.... (Jj ~ :;;:I ; ;.\_ 100-. 1!"'''-_~~'''O ..~-d0g~ <:§.!!a v..~o~oo-[,t,¡ c: q,¡ QI;I;t.oo u 0 .. .. -g C':I "g ã ~.~ =~==w5: r",1~ ¡;:: ì!S...,¡;;;: .... v..:;;:~CI.J~t':i.~~~ c u.:J "'0 :=I:;j.- -- -.......,ROO ~.~.::2 -fI¡:-iJ--:5",,,,...¡...¡ WQ.).!!C<:~i:o.CI'.Iu:I ,s'9.gw zz<>.<>. ~æ:",,,IIWWZZ " II "u g " II uu ~~¡'¡"'0<:<t11111 * "-",uz--,,,... 'õ I I I I I I I I I I I I I I I I I I I B . ~ c ... ... I ] \c. a¡ I ~ I I I I I I I I -. -". ..-... .- ---....-.-..---.---.-"..----.- I ..- ..-- I ..- I auNT! ç05r.ç....- I ~ON~~-OUN'f{ -~ ToAISD.AC .V- I I UNINCðRPORA.T~O ALAM,S"DA ÇOI)NrY ---~------ I CITY OF DI.Jel..IN I Approx_ location of proposed I future TassaJara Creek bridges I I g I ~ " ! ~ 8 I " ~ ~ . ! I I Conservation Area I 0 ~ ð J I SOURCe' H, T. Harvey & Associates, Ecological CDnsultants, 3-3-2003. I Exhibit 13 Tassajara Creek I Conservation Area N Project Area Boundary I CITY OF DUBLIN t DUBLIN RANCH WEST 0 3( () """ 1200feer SUPPLEMENTAL ENVIRONMENTAL IMPACT REPOfIT I . I I I I I I I I I I I I I I ~ " I ~ ¡¡ ~ 1: · ~ I i .~ · -< ð I · , .. I I I I UN" C05~?- -- COÑ~~ r OI,JNít' ":.v"EO^ C -" - - UNlNCOfiro!MrElJ ALAMEDA ÇOI.lWTY ---~-~~_.- ~fTY or DUBLIN _ Congdon's Tarplant SOURCE: Wetlands RBSliJarch Associates, Inc., August 2004. Exhibit 14 CONGDON'S TAR PLANT L:OCATIONS I Area Boundary CITY OF DUBLIN DUBLIN RANCH WEST SUPPLEMENTAL I'NVIIIONMENTAlIMPACT IIEPORT o I 300 800 12OD_, I I ...- ...-" I ...-"' "" I UN" costA C?~__ I CON~~-OI".lNí'r' ~~ MEDAC ACi' I I VNINc:.ORPORA~D AL.AMEDA COO/'fTY I -~--~~---- çfït OF OUBUN I I I I ~ I :¡ D California Red-legged Frog (CRLF) " I Associated Upland Habitat (300 ft. buffer from specific accessible points along creek) I " 1 ~ o Impacted CRLF Associated Upland Habitat Æ "~ [:,:,',',:1 Impacted CRLF Dispersal Habitat I 0 . " . " , I ~ ~ SOURCE: Wetlands AesBarch Assooìates, Inc.. AugUSl2004. I exhibit 15 CALIFORNIA RED-LEGGED I FROG HABITAT N Area Boundary I CITY OF DUBLIN ! DUBLIN RANCH WEST 0 300 M t2001eet SUPPLEMENTAL ENVIRONMI;NTAlIMPACT REPORT I . , I I I I I I I I I I I I I I I I I I I I I 4.4 LAND USE Land use impacts were analyzed in Chapter 3.1, Land Use, of the Eastern Dublin EIR. Impact areas included Project alterations to existing and planned land use patterns, land use compatibility with on-site and adjacent land uses and Project impacts on agricultural lands, including Williamson Act lands. Chapter 3.1 of the DEIR also discussed planning concerns involving sphere-of-influence changes, planning areas and special districts. Consistency with relevant local land use plans and policies were also included. ENVIRONMENTAL SETTING On-site land uses The westerly portion of the Project area contains steep to moderate slopes adjacent to Parks RFTA. Steep slopes transit to rolling hills and a central generally flat area in the approximate center of the site. The easterly portion of the Project area is dominated by Tassajara Creek, which has a well-defined, incised bank generally paralleling Tassajara Road. A number of scattered single family residential uses, a historic dairy complex and a historic schoolhouse are found within the Project area fronting on Tassajara Road (see page 32 of the Initial Study, Appendix 8.1, regarding a description of the dairy complex). Section 4.1 of the DSEIR discussed existing and historic cattle grazing on the Wallis Ranch portion of the proposed Project. Surrounding land uses Land uses north of the Project area, within Contra Costa County, contain a mix of scattered rural residential dwellings, open fields and agricultural uses. East of the area, lands are generally undeveloped with a number of single-family residences on large lots. Grading has recently commenced for the Pinn Brothers single-family development of 247 lots on the Silveria/Haight property immediately to the east, across Tassajara Road. Another major land use east of the site is the Quarry Lane School, a private K-12 educational facility that was approved for construction within Alameda County but has since been annexed into the Gty of Dublin and the Dublin San Ramon Services District (DSRSD). The school has proposed an expansion plan to increase student enrollment, which has been approved by the Gty of Dublin. South of the area, uses include open, undeveloped properties and Tassajara Creek. Scattered single family dwellings have also been constructed south of the Project fronting along Tassajara Road. Camp Parks Reserve Forces Training Area (RFTA) forms the westerly boundary of the Project area. The area of Parks RFI'A immediately to the west of the Project area is identified as Area M in the Parks RFT A Master Plan. Area Muses include field exercises, primarily mobile tent sites for weeklong periods of time. Activities typically involve electric generators, vehicle and helicopter operations and bivouac functions (sleeping, cooking, showering and similar activities) and Dublin Ranch West Draft Supplemental EIR City of Dublin Page 78 November 2004 Dublin Ranch West Draft Supplemental EIR City of DUblin Page 79 November 2004 I I I I I I I I I I I I I I I I I I I firing of blank weapons for four to 400 people. Area M is also used for the annual East Bay Stand Down program, where homeless veterans from around the Bay area receive medical treatment in a field hospital. Land use regulatory programs Alameda County East County Area Plan ŒCAP). The Project area lies in presently unincorporated area of Alameda County. Therefore, the primary existing land use regulatory document is the East County Area Plan (ECAP), adopted by the Alameda County Board of Supervisors on May 5,1994. The Plan has subsequently been updated as of November 2000 to address land use impacts of Alameda County Measure D. ECAP provides long-term land use regulation for approximately 418 square miles of unincorporated lands generally located adjacent to Dublin, Pleasanton, Livermore and a portion of Hayward, extending from the Dublin/ Pleasanton ridgeline on the west to the Alameda/ San Joaquin County line on the east and from the Alameda/ Contra Costa County line on the north to the Alameda/Santa Oara County line on the south. Figure 4 of the Plan designates the Project area as lying within an Urban Growth Boundary. ECAP Policy 17 states that "the County shall support the eventual City annexation or incorporation of all existing and proposed urban development within the Urban Growth Boundary consistent with the East County Plan." The Land Use Diagram found in the East County Area Plan designates the Project area as a combination of "Water Management" along Tassajara Creek, "Parklands" along a corridor paralleling the Project area boundary with Camp Parks, and "Medium Density Residential (8.1-12 units/ acre) for the central portion of the Project area. A small pocket of "Low Density Residential (1-4 units/ acre)" is proposed in the northwest corner of the Project area. Exhibit 6 shows existing ECAP land use designations for the Project area. Unincorporated properties east of the Project area are designated for ""Low Density Residential," and "Medium-High Density Residential" on the ECAP Land Use Diagram. Dublin General Plan Amendment/Eastern Dublin Specific Plan. The Dublin City Council adopted the Dublin General Plan in 1985, with several amendments approved since then. The General Plan contains the long-term vision of the community in terms of development policy, including but not limited to location of various land uses, density and intensity of land use types, location and widths of roads, community appearance standards, health and safety considerations and similar requirements. The General Plan Land Use Diagram designates Parks RFTA, immediately west of the Project area as "Public," reflecting U.S. military ownership and use of this area. Properties located north and east of the Project area is designated as Rural Residential/ Agriculture on the Eastern Extended PlaruUng Area General Plan diagram. Properties north of the Project site lie within Contra Costa County. I I I I I I I I I I I I I I I I I I I As detailed in the DSEIR Project Description (Section 3.0), the Oty of Dublin adopted the Eastern Dublin General Plan Amendment/Specific Plan in 1993 to guide the future development of properties lying south of the Alameda/ Contra Costa County line, east of Camp Parks, north of the 1-580 freeway and west of the Doolan Canyon area. The EDSP designates the Project area for a mix of "Low Density Residential (0.9- 6 units/ acre), "Medium Density Residential (6.1-14 units/ acre)," Medium High Density Residential (14.1c25 units/ acre), " "Neighborhood Park," "Neighborhood Square," "Open Space," and "Neighborhood Commercial." An Elementary school site is also shown within the Project area. Exhibit 9 shows the existing EDSP land use designations. Properties lying east of the Project area are designated in the EDSP as a mix of "Rural Residential," "Medium Density," and "Medium High Density" land use designations. Dublin Zoning Ordinance. Although not presently governed by the Oty of Dublin Zorung Ordinance, the Gty of Dublin has adopted a Zoning Ordinance as part of the Dublin Municipal Code to implement the General Plan by the establishment of individual zoning districts by land use type. Zoning districts regulate permitted land uses, height and setback requirements and similar development standards. The Project area is presently subject to Alameda County zoning designations, which includes an "Agricultural" zoning designation, but an application has been filed to prezone the area to the City of Dublin to the PD-Planned Development District. IMP ACTS AND :MITIGATIONS FROM THE EASTERN DUBLIN EIR The Eastern Dublin EIR analyzed the substantial alteration of the Eastern Dublin area from a predominantly rural and agricultural area to a predominantly urban area. An estimated 53% of the land area governed by the Eastern Dublin General Plan Amendment and 70% of the land proposed by the EDSP would be converted to urban uses (Impact 3.1/ A). The Eastern Dublin EIR concluded that the alteration of land uses, in and of itself, was an insignificant impact. Specific environmental impacts associated with the land use alteration manifest themselves in such areas as traffic, biological resources and air quality and were discussed separately in the Eastern Dublin EIR. Land use compatibility impacts were also considered in the Eastern Dublin EIR (Impact 3.1 /B), related to abrupt transitions between single-family development and higher density development. Policies contained in the EDSP provide for buffering and other land use compatibility features, so Impact 3.1/B was identified as an insignificant impact. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 80 November 2004 Dublin Ranch West Draft Supplemental EIR City of Dublin Page 81 November 2004 I I I I I I I I I I I I I I I I I I I Impact 3.1/F described insignificant impacts related to areas of the EDSP project area that adjoin non-urban lands designated for Open Space and Rural Residential (see EDEIR pages 3.1-18). Impact 3.1/ G is a potentially significant impact due to the possibility of land use conflicts if the U.s. Anny increases its training activities at Parks RFTA located due west of the project area. Adopted Mitigation Measure 3.1/1.0 requires the City to coordinate planning with the Army. Impacts 3.1 /H-J outline impacts related to land use compatibility for properties lying south, east and north of the Eastern Dublin project area, respectively. Each of these impacts were identified as insignificant impacts. SUPPLEMENTAL IMPACTS AND MITIGATION MEASURES An application has been filed for one of the properties comprising the Project area (Dublin Ranch West) to amend the General Plan and Eastern Dublin Specific Plan to delete 0.8 acres of Neighborhood Commercial land use (approximately 10,400 square feet of floor area) and to delete an existing 9.7-acre Elementary School site. The existing Neighborhood Commercial land use designation would be replaced with an Open Space designation and the existing Elementary School designation would be replaced with a residential land use designation, so that proposed development on the Dublin Ranch West property would contain no Elementary School or Neighborhood COmmercial land uses. The amount of Neighborhood Park and Neighborhhood Square would also be less than designated in both the Eastern Dublin Specific Plan and the City of Dublin Parks and Recreation Master Plan, which is addressed in Section 4.8, Parks and Recreation. The total number of residential units on the Dublin Ranch West site would increase from 817 dwellings to 1034 dwellings--an increase of 217 dwellings. Table 7 compares existing and proposed EDSP land use designations for the Dublin Ranch West Project. I I I I I I I I I I I I I I I I I I I Table 7. Existing and Proposed Land Use Designations-Dublin Ranch West Land Use Designations I Existing Desie:nations Proposed Desie:nations Gross Ac. Units/ s.f. Gross. Ac. Units Low Density Residential 20.0 80 18.8 75 Medium Density Residential 64.1 641 55.7 557 Medium High Density 4.8 96 20.2 402 Residential Neighborhood Park 11.8 n.a. 7.8 n.a. Neighborhood Square 2.8 n.a 0.0 n.a. ()Pen Space 70.1 n.a. 81.7 n.a. Elementary School 9.7 n.a. 0.0 n.a. Neighborhood Commercial 0.8 10,454 0.0 n.a Subtotal 184.1 817 d.u. 1,034 d.u 10,454 s.f Source: MacKay and Somps. 2004 No changes to the General Plan or the Eastern Dublin Specific Plan are proposed for the two other properties comprising the Project area (the Bragg and Spersflage properties). As noted in the Project Description (Chapter 3), prezoning of the entire Project area to the City of Dublin PD-Planned Development District has also been requested. Proposed reorganization The proposed Project also includes a reorganization to annex Project properties presently in the unincorporated portion of Alameda County into the City of Dublin and Dublin San Ramon Services District. The proposed annexation area is shown in Exhibit 3, located in the Project Description section. Properties proposed for annexation as part of this Project are substantially surrounded by lands already within the City of Dublin and lying within the City of Dublin sphere of influence as adopted by the Local Agency Formation Commission (LAFCO). This does not include properties lying north of the Project, since this area is within Contra Costa County. Significance Criteria. The following criteria have been used to identify the significance supplemental land use impacts, if any of the following would occur to a substantially greater degree than was analyzed in the Eastern Dublin EIR: . conflict with any applicable land use plan, policy or regulation of an agency with jurisdiction over the project, including but not limited to a general plan, specific plan, zoning ordinance or similar document, adopted for the purpose of avoiding or mitigating an environmental impact; Dublin Ranch West Draft Supplemental EIR City of Dublin Page 62 November 2004 Dublin Ranch West Draft Supplemental EIR City of DUblin Page 83 November 2004 I I I I I I I I I I I I I I I I I I I · result in substantial change in the types of land uses in an area which could result in conflicts with neighboring land uses or with the established pattern of development; · result in the physical division of an established community, as with the construction of a freeway, railroad, canal or similar barrier; · conflict with an adopted Habitat Conservation Plan or Natural Community Conservation Plan. Supplemental Impacts. Less-than- significant supplemental impacts are expected from the proposed amendment to the General Plan and Eastern Dublin Specific Plan. Under the proposed amendments, implementation of the proposed development plan for the Dublin Ranch West site would be consistent with the analysis contained in Eastern Dublin EIR Impact 3.1/ A, Substantial Alteration to Existing Land Uses, since the same extent of currently vacant land would be converted to urban uses as identified in the Eastern Dublin EIR. Although EDSP land use designations are proposed to be changed to eliminate an Elementary School site, a Neighborhood Square, Neighborhood Park and a Neighborhood Commercial site, the type and intensity of the proposed land use change, to Medium Density Residential, Medium High Density Residential and Open Space, development standards contained in the EDSP, and the proposed Stage 1 Development Plan, would not represent an abrupt or significant on-site land use change as identified in Impact 3.1/B of the Eastern Dublin EIR and requires no further discussion. The Project site is not adjacent to the east or south boundaries of the Eastern Dublin area, so Impacts 3.1/H and II are inapplicable to this Project. Similarly, the Project site is not adjacent to the Santa Rita Rehabilitation Center, so Impact 3.1/J is also inapplicable. With regard to potential conflicts with Parks RFTA operations, this was identified as a potentially significant impact in the Eastern Dublin EIR (Impact 3.1/G). Since the proposed Project site has a common border with Parks RFT A to the west, there could be a potentially significant impact with regard to this topic. Based on a recent discussion with Parks RFT A staff, the only potential impact of the proposed Project on long-term operations of the RFTA would be noise impacts associated with on~going operations in Area M. This impact has been addressed in Impact 3.10/D, Exposure of Proposed Residential Development to Noise from Future Military Training Activities at Parks Reserve Forces Training Area and the County Jail. Mitigation Measure 3.10/3.0 requires that future residential development near Parks RFTA submit an acoustical analysis to determine if future noise from Parks RFT A or the County Jail will be within acceptable limits. Even with mitigation included in the Eastern Dublin EIR, these impacts would continue to be significant and the Oty of Dublin adopted a Statement of Overriding Considerations upon approval of the Eastern Dublin General Plan Amendment and Specific Plan. However, no new significant supplemental impacts have bee identified with regard to this proposed Project. I I I I I I , I I I I I I I I I I I I I There are no adopted Habitat Conservation Plans or Natural Community Conservation Plans in or near the Project site. However, the Dublin Ranch West property owner has established a conservation area, known as the Tassajara Creek Conservation Area. This Conservation Area includes properties within and along Tassajara Creek through the Project site as well as land to the east along the Northern Drainage north of Dublin Ranch. The purpose of the Conservation Area is to provide long-term mitigation for biological impacts on the Dublin Ranch project to the east. Exhibit 13, contained in Section 4.3 (Biological Resources) depicts the Tassajara Creek Conservation Area as well as a more complete description of the Area. The proposed Project would modify existing EDSP and General Plan land use designations so that current urban-type uses, including but not limited to Neighborhood Commerdal and Medium High Density Residential, would be replaced by an Open Space land use designation within the jurisdiction of the Tassajara Creek Conservation Area. With approval of the requested General Plan and EDSP Amendments, the proposed Project would be consistent with the intent of the Conservation Area. Since the Tassajara Creek Conservation Area is not a recognized Habitat Conservation Area or a Natural Community Conservation Plan area as recognized by the California Department of Fish and Game or the U. S. Fish & Wildlife Service, and there would be no conflicts with or impacts with regard to a Habitat Conservation Plan. 4.5 POPULATION, HOUSING AND EMPLOYMENT ENVm.ONMENTAL SETTING This section updates the Eastern Dublin EIR discussion contained in Chapter 3.2 of the demographic, employment and housing context of the proposed Project. It contains a general description of expected Bay Area growth as well as more detailed population and housing development projections for the Tri-Valley subregion and for the City of Dublin. Population and housing projections for the Project are described. The physical environmental (secondary) effects associated with population, employment and housing are addressed as applicable in the sections 3.3 through 3.12 of the Eastern Dublin ErR, as updated by this Supplemental DEIR. Regional Overview The Association of Bay Area Governments' (ABAG) "Projections 2003" provides current population, household, income and employment forecasts for the nine- county San Francisco Bay Area Region. In order to place the proposed Project in its overall regional context, several findings of ABAG's projections for the years 2000 to 2020 are summarized in this section. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 84 November 2004 Dublin Ranch West Draft Supplemental EIR City of Dublin Page 85 November 2004 I I I I I I I I I I I I I I I I I I I Population ABAG expects the nine-county San Francisco Bay Region to add approximately 1 million new residents by the year 2020, reaching a total population of 8,168,300. This represents an increase of about 20 percent over the 20-year forecast period from 2000 to 2020. The ratio of population to household growth has differed significantly in the region over the past several decades. Between 1960 and 1970 household growth in the Bay Area was approximately one-third of population growth: i.e., an additional household was added for every three new residents. In the 197Qs, the number of new residents added was only slightly higher than the number of new households. In the 1980s, the pattern of the 1960s was reestablished -- one new household was formed per every three new residents. Housing affordability affects household size by reducing the household formation rate. Household size in the Bay Area changed from 2.57 persons per household in 1980, to 2.61 Fersons per household in 1990, and then rapidly increased to 2.68 persons per household in 1995. ABAG expects this trend to continue to the year 2005, with a gradual decline in persons per household occurring between 2005 and 2020. Table 8. Regional and Tri-Valley Population Projections Area 2000 2005 2010 2015 2020 % Change Bay Area 6,783.762 7,193,900 7,527,500 7,840,200 8,168,300 20% Tri· Valley Dublin 30,007 39,400 47,500 52,900 59,100 96% Livermore 73,841 81,400 90,400 93,800 99,500 35% Pleasanton 65,058 72,600 79,200 82.100 85,200 31% San Ramon 44,834 53,000 60,100 69,400 78,800 76% Subtotal 213,740 246,400 277,200 298,200 322,600 51% Danville 42,958 44,900 45,400 45,300 45,100 5% Alamo-Bhwk 23,809 24,500 24,900 24,800 24,900 5% Subtotal 66,767 69,400 70,300 70,100 70,000 5% Total 280,507 315,800 347,500 368,300 392,600 40% Source: Association of Bay Area Governments. Proiections 2003. Housing ABAG estimates that the increase of new households expected in the region by 2020 will create a demand for at least 20,000 new dwellings each year. (In the ABAG projections, households are approximately the same as occupied housing units.) Tri-Valley and regional area household projections are summarized in Table 9. I I I I I I I I I I I I I I I I I I I Table 9. Regional and Tri.Valley Households Area 2000 2005 2010 2015 2020 % ChaD2e Dublin 9,335 12,440 15,330 17,320 19,680 110% Livermore 26,315 28,380 31,490 32,760 34,880 33% Pleasanton 23,831 26,000 28.340 29,490 30,710 29% San Ramon 16,981 19,950 22,710 26,370 30,030 77% Danville 15,266 15,870 16.100 16,110 16,120 6% Alamo-Bhwk 8,022 8,230 8,380 8,390 8,400 4% Total 99,750 110,870 122,350 130,440 139,820 40% Bav Area 2,466,020 2,581,380 2,702,090 2,824,030 2,950,970 17% Source: Association of Bay Area Governments, Proiections 2003_ Dublin Ranch West Draft Supplemental EIR Page 86 City of Dublin November 2004 Dublin Ranch West Draft Supplemental EIR City of Dublin Page 87 November 2004 I I I I I I I I I I I I I I I I I I I Employment ABAG predicts that job growth in the Bay Area will be in a broad variety of sectors located throughout the Bay Area. The region is expected to add approximately 938,000 jobs by year 2020, an increase of over 47,000 new jobs annually. Most of this growth is projected to occur in services (business and professional, health and recreation, social and personal), manufacturing, and retail trade, with more than 50 percent of new jobs in the services sector. See Table 10 below. Table 10. Existing and Projected Employed Residents Axea 2000 2005 2010 2015 2020 % Chanl!:e Bay Area 3,605.675 3,721,100 3,963,700 4.294,960 4,543,590 26% Tri- Valley Dublin 14,365 19,010 24,320 27,960 32,730 56% Livermore 39,125 42,480 49,380 52,480 57,810 48% Pleasanton 36,550 40,140 45,840 48,720 52.510 44% San Ramon 26,965 31,950 37,820 44,440 50,910 89% Subtotal 117,005 133.500 157,360 173,600 193,960 66% Danville 23,689 24.840 26,210 26,540 26,720 13% Alamo-Bhwk 11,958 12,380 13,100 13,280 13,370 12% Subtotal 35,647 37,220 39,310 39,820 40,090 13% Total 152,652 170,800 196.670 213,420 234,050 53% Source: Association of Bay Area Governments, Proiections 2003. Dublin and the Tri-Valley Subregion This section describes the existing and projected population, employment and housing characteristics of the Tri-Valley subregion. This area comprises the cities of Dublin, Livermore and Pleasanton in the Livermore-Amador Valley and the cities of San Ramon and Danville in the San Ramon Valley. In addition, the unincorporated Contra Costa County area of Alamo-Blackhawk is included as part of the subregional context for the Project. Papulation ABAG estimates that the 2000 population in the Tri-Valley area was 280,507, and that it will reach 392,600 by the year 2020. The additional approximately 112,100 persons expected to be added to the subregional population during the forecast period between 2000 and 2020 represent a 39 percent increase for that period. The City of Dublin's population is projected to increase by 29,100 (96 percent) during the same period. The number of households in the Tri-Valley is estimated to increase by 40,070 between 2000 and 2020 to reach a total of 139,820 households (see Table 3.2-2). This represents an increase of approximately 40 percent during the forecast period. I I I I I I I I I I I I I I I I I I I Emplayment In the past two decades, commercial and industrial development has increased dramatically in the Tri-Valley area, much of it due to the relocation of businesses from San Francisco possibly seeking relief from land scarcity, high lease rates, high housing costs, and strict planning controls. ABAG projects a continuation of this trend. Employment is sited in various locations the Tri-Valley area, including the Oty of Dublin. Four major employment centers in the Tri-Valley area - the City of Dublin; Hacienda Business Park in Pleasanton; Bishop Ranch in San Ramon; and the Crow Canyon area in San Ramon -- are described below. The City of Dublin had approximately 5.8 million square feet of commercial space (including retail, office, and industrial) in early 2001. Dublin had an estimated 21,870 jobs in the year 2000. Hacienda Business Park in the City of Pleasanton is expected to contain approximately 11.2 million square feet of commerdal space at buildout in 2005. Hacienda is approximately 87 percent completed, with a total of 9,720,005 square feet of mixed-use commercial space. There are presently approximately 21,133 employees within Hacienda and a total of approximately 28,000 employees is antidpated at buildout. Bishop Ranch in the Oty of San Ramon contains approximately 7.9 million square feet of industrial and office space and employs approximately 25,000 people. At buildout in 2002, Bishop Ranch is anticipated to have 8.9 million square feet of office and light industrial space and 29,000 employees. The Crow Canyon Corridor area in San Ramon had approximately 4.8 million square feet of office, retail and industrial space in 2000 (Chamberlain, pers. comm. 2001). Regional Housing Needs The State of California has determined that each local agency must be responsible for providing their respective fair share of the total statewide housing need. This includes affordable housing for all income levels, including very low (below 50% of median County income), low (between 50 and 80% of median County income), moderate (80-120% of median County income) and above moderate (120+% of median County income) households. The Association of Bay Area Governments (ABAG) is responsible for allocating region-wide fair share housing goals among member agencies. Housing goals are established for seven-year periods. Identification of appropriate housing sites and implementation strategies to assist in the achievement of these targets is to be carried out through Housing Elements of the General Plan for each commulÙty. The City's existing Housing Element was adopted in 1985 and was recently updated to ac:c:ommodate Dublin's fair share housing targets. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 88 November 2004 Dublin Ranch West Draft Supplemental EIR City of Dublin Page 89 November 2004 I I I I I I I I I I I I I I I I I I I For the City of Dublin, ABAG has established the total number of new dwellings within the seven-year period (1999-2006) is 5,436 units. This includes; Very Low income households (796 dwellings), Low income households (531 dwellings), Moderate income households (1,441 dwellings), and Above Moderate income households (2,668 dwellings). The City of Dublin Zoning Ordinance includes an inclusionary housing section (Chapter 8.68), which requires that 12.5% of each new housing development be devoted to affordable housing units, including households of very low, low and moderate-incomes. Jobs/Housing Balance The Eastern Dublin Specific Plan emphasizes the need to provide affordable housing to assist with maintaining a favorable jobs-housing balance. The Specific Plan includes the following policies and action programs in support of affordable housing: · Policy 4-8: Encourage the development of affordable housing throughout eastern Dublin, and avoid the concentration of such housing in anyone area. · Policy 4-9: Ensure that projects developed in the plan area provide affordable housing in accordance with the City's Housing Element, the Inclusionary Housing Ordinance, the Density Bonus Ordinance, and the Rental Availability Ordinance. · Policy 4-10: Affordable housing in eastern Dublin shall include both ownership and rental units and a mix of single family and multi-family units. · Policy 4-11: Developers shall include affordable housing units within their developments pursuant to City housing ordinances. · Program 4F: Develop an inclusionary housing program for Eastern Dublin which requires a minimum percentage of all approved units to be affordable to very low, low, and moderate-income households. · Program 4G; Explore the possibility of establishing an in-lieu fee to support the development of below-market-rate housing. · Program 4H; Develop a monitoring program that will track residential growth in Dublin in terms of unit type and price categories. Such a program will provide City decision-makers with data necessary to make informed decisions relating to City housing goals and new development. · Program 41; Develop a specific numeric goal for percentage of affordable units in Eastern Dublin wl:ùch should be ownership units as opposed to rental units. I I I I I I I I I I I I I I I I I I I It is difficult to maintain a jobs-housing balance within an area, such as the Tri- Valley, when there are a number of jurisdictions and no comprehensive planning efforts between them. Given the need for California cities to raise revenue in the post-Proposition 13 economic climate, jurisdictions often compete for housing or employment-generating uses without considerations of regional implications. The Specific Plan attempts to avoid the impacts that can arise from the imbalance between jobs and housing by establishing a mix of residential and employment- generating land uses. IMPACTS AND MITIGATIONS FROM THE EASTERN DUBLIN EIR The Eastern Dublin ElR discusses population, regional housing needs and jobs/housing balance. The EIR identifies an estimated 12,458 dwelling units in the Eastern Dublin Specific Plan area with a build-out population of 27,794 residents and 28,288 jobs. These estimates have changed since adoption of the Eastern Dublin Specific Plan and General Plan Amendment based on a number of recent amendments to the Specific Plan, primarily due to the inclusion of the Dublin Transit Center into the Eastern Dublin Specific Plan. The Dublin Transit Center project, which is located south of Dublin Boulevard and west of Arnold Drive was added to the Eastern Dublin Specific Plan in 2002, At buildout of the Transit Center, up to 3,000 residents and 7,832 jobs would be added to the Eastern Dublin planning area in addition to the residents and jobs cited above. SUPPLEMENTAL IMPACTS AND MITIGATION MEASURES An application has been filed for the Dublin Ranch West property within the Project area to amend the General Plan and Eastern Dublin Specific Plan to delete a existing Neighborhood Commercial land use designation (approximately 10,400 square feet of floor area) and a 9.7-acre Elementary School site and replace these with an Open Space and Medium-High Density Residential land use designations. The total number of residential units on the Dublin Ranch West site would increase from 817 dwellings to 1094 dwellings. Population and housing impacts of this proposed change are discussed below. No land use changes are proposed for the Bragg or Spersflage properties within the Project area. Significance Criteria. A population and housing impact would be considered significant if: . a proposed project would induce substantial population growth, either directly or indirectly; or . displace a substantial number of residents. Supplemental Impacts. No significant supplemental impacts are expected from the proposed amendment to the General Plan Amendment and Eastern Dublin Specific Plan and related land use requests. Under the proposed Project, implementation of the proposed Stage 1 Development Plan would result in an Page 90 November 2004 Dublin Ranch West Draft Supplemental EIR City of DUblin Dublin Ranch West Draft Supplemental EIR City of Dublin Page 91 November 2004 I I I I I I I I I I I I I I I I I I I increase of approximately 550 residents over the current General Plan and Specific Plan land use designations, as shown on Table 11, below Table 11. Proposed Dublin Ranch West Population Generation Residential Persons/DU Existing SP Proposed SP Type DUs POP DUs PoP. Low Density 3.2 80 256 75 240 Residential Medium Density 2.0 641 1,282 557 1114 Residential Medium High Density 2.0 96 192 402 804 Residential Totals 817 1730 1034 2,158 Notes: d.u. = dwelling unit (a) 0_24 FAR for sChool uses, per Eastern Dublin Specific Plan Table 4.1, p. 24 PCJfJulation impacts Approval and implementation of the proposed Project would add an estimated 428 residents on the Dublin Ranch West portion of the Project area at buildout. With an estimated total population within the EDSP area of over 27,700, the addition of 428 residents would result in an increase of approximately 1% in the EDSP area. This is not a significant increase and would result in a less-than- significant impact. Impacts related to the proposed population increase, such as additional traffic, air quality impacts and demand for utility services and community facilities are addressed elsewhere in this DSEIR. Employment impacts A reduction of 10,400 square feet of neighborhood commercial land uses would result in a loss of approximately 21 permanent jobs (assuming 490 square feet of commercial floor area per jobs for Neighborhood Commercial uses, from Table 3-2.6 of the EDSP). This impact also would be less-than-significant in comparison with the 28,000+ jobs anticipated within the EDSP planning area. Jobs/housing balance The jobs/housing balance for the Eastern Dublin area would not be significantly affected by the proposed deletion of 21 jobs or the addition of an estimated 428 residents within the Project area. The EDSP noted that the original Specific Plan was somewhat out of balance between jobs and housing units, with many more jobs planned than housing units. Since the adoption of the Specific Plan, the Gty of Dublin recently approved the Dublin Transit Center Amendment to the General Plan and Specific Plan that would add 2,000,000 square feet of campus office and 70,000 square feet of retail floor space. Most recently, the Gty of Dublin approved another amendment to the General Plan to change the land use designation for approximately 27.5 acres of land on I I I I I I I I I I I I I I I I I I I the northwest corner of the 1-580 freeway and Hacienda Drive to delete a Campus Office land use designation and replace this with a Community Commercial land use designation. This amendment allows construction of an IKEA furniture store and ancillary commercial uses. These amendments assisted in shifting the overall jobs-housing ratio closer to balance. Within this overall framework, potential impacts related to the Eastern Dublin jobs/housing balance by the proposed Project would result in a less-than- significant impact. Growth inducement Approval of the proposed Project would not represent growth inducement. The Project area has been included in the General Plan and Eastem Dublin Specific Plan since these documents were adopted by the City in 1993. The Project proposes minor changes to planned uses on one of the three properties comprising the Project site with no changes proposed on the remaining two properties. Therefore, there would be no supplemental impact with regard to growth inducement. Dublin Ranch West Draft Supplemental EIR City of Dubli n Page 92 November 2004 Dublin Ranch West Draft Supplemental EIR City of Dublin Page 93 November 2004 I I I I I I I I I I I I I I I I I I I 4.6 Transportation and Circulation (Note: Supplemental impacts of the proposed Project have been analyzed by TJKM Transportation Consultants. A complete copy of their report is found in Appendix 8.5.) Traffic and Circulation was analyzed in Chapter 3.3 of the Eastern Dublin EIR. This supplement to the ElR examines compliance with the City of Dublin's established standards for intersection levels of service (LOS) in light of increases in regional traffic and changes in commute patterns since certification of the Eastern Dublin EIR in 1993. ENVIRONMENTAL SETTING Existing roadway network Interstate 580 is an eight-lane east-west freeway that connects Dublin with local cities such as Livermore and Pleasanton as well as regional origins and destinations such as Oakland, Hayward and Tracy. In the vicinity of the proposed Project, 1-580 carries between 184,000 and 196,000 vehicles per day (vpd) (according to Caltrans' 2002 Traffic Volumes on California State Highways) with interchanges at Dougherty Road/Hopyard Road, Hacienda Drive, Tassajara Road/Santa Rita Road and Fallon Road/EI Charro Road. Dublin Boulevard is a major east-west arterial in the Oty of Dublin. Dublin Boulevard, west of Dougherty Road, is a four to six lane divided road fronted largely by retail and commercial uses. Between Dougherty Road and Tassajara Road, Dublin Boulevard is a six-lane divided arterial fronted primarily by residential, commercial and vacant lands. Dublin Boulevard extends east of Tassajara Road to Keegan Street as a four-lane roadway fronted by new residential development. Tassajara Road connects with Santa Rita Road at 1-580 to the south and continues north to the Town of Danville. It is four lanes wide between 1-580 and North Dublin Ranch Road. North of the Contra Costa County line, it is named Camino Tassajara. Camino Tassajara is used primarily for local traffic in the Tassajara Valley, with some through traffic. Central Parkway is a two-to-three lane east-west collector that extends from Arnold Road to Keegan Street (east of Tassajara Road) and is being planned for an extension east of Fallon Road as part of the East Dublin Properties project. Hacienda Drive is an arterial designed to provide access to 1-580. North of 1- 580, Hacienda Drive is a two-to-six-Iane arterial running in the north-south direction from Gleason Drive southerly to 1-580. It is primarily fronted by commercial, office and residential uses. South of 1-580, Hacienda Drive is a six- lane divided road, a major arterial in the Oty of Pleasanton. I I I I I I I I I I I I I ,. I I I I I Transit service Altamont Commuter Express (ACE). The Altamont Commuter Express operates three trains per day between Stockton and San Jose. The trains provide westbound service in the morning and eastbound service in the evening. The trains have Tri-Valley stations at Vasco Road in Livermore and near the downtowns of Livermore and Pleasanton, the latter of which is most likely to serve Dublin çommuters. The ACE train was not in operation at the time the Eastern Dublin Spectfiç Plan and General Plan Amendment were approved and the Eastern Dublin EIR was certified. Livermore Amador Valley Transit Authority (LAVTA Wheels). The Livermore-Amador Valley Transit Authority provides bus serviçe to the communities of Dublin, Pleasanton and Livermore. Several bus lines currently provide serviçe to Eastern Dublin, including lines 12, 12)(, lOA, lA, IB, 20X and the ACE connector. Lines operate on approximately 30-minute headways. It is expected that these lines would be expanded further as additional homes and businesses are constructed in the Eastern Dublin area. There is a Wheels bus connection between eaçh ACE train and the Dublin/Pleasanton BART station with intermediate stops. Fixed route transit service, DART, (Direct Access Responsive Transit) is also available in the Dublin area. BART. The Bay Area Rapid Transit (BART) District operates trains between the Dublin-Pleasanton station near Hacienda Drive and the Oak1and~San Francisco area. The trains operate on I5-minute headways on weekdays. The Dublin- Pleasanton station is accessible by private auto, taxi çabs, buses, and private shuttles as well as by pedestrians and bkyclists. The parking lot has a capacity of approximately 3,000 parking stalls. IMPACTS AND MmGA TIONS FROM TIlE EASTERN DUBLIN EIR Freeways The Eastern Dublin EIR identified significant, signifkant cumulative, and significant unavoidable adverse impacts related to daily traffic volumes on 1-580 with and without build-out of the Eastern Dublin Specifiç Plan and General Plan Amendment and under a Year 2010 cumulative build-out scenario (Impacts 3.3/ A, B, C, D, and E). The significance criteria for freeway segments was operations that exceed level of service (LOS) E. Mitigation measures (3.3/1.0 and 3.3/4.0) were adopted which reduced impacts on 1-580 between Tassajara Road and Fallon Road and on 1-680 north of 1-580 to a level of insignificance. Other mitigations (3.3/2.0, 2.1, 3.0 and 5.0) were adopted to reduce impaçts on the remaining 1-580 freeway segments and the 1-580/680 interchange. Even with mitigations, however, significant cumulative impacts remained on 1-580 freeway segments between 1-680 and Dougherty Road and, at the build-out sçenario of 2010, on other segments of 1-580. Upon certification of the Eastern Dublin EIR and approval of the Eastern Dublin GP A/ SP, the Oty adopted a Statement of Overriding Considerations (Resolution No. 53-93), for these significant unavoidable cumulative impaçts (Impacts 3.3/B and E). Dublin Ranch West Draft Supplemental EIR City of Dubiin Page 94 November 2004 Dublin Ranch West Draft Supplemental EIR City of Dublin Page 95 November 2004 I I I I I I I I I I I I I .. I I I I I All mitigation measures adopted upon approval of the Eastern Dublin GP A/SP continue to apply to implementing actions and projects such as the proposed Project. Intersections and roads The Eastern Dublin EIR evaluated levels of service and PM peak hour traffic volumes at 18 intersections with roads and 1-580 ramps for cumulative buildout without the GP A/ SF project and cumulative buildout with the Project. The significance criteria for intersections were operations that exceed LOS D. Mitigation measures were identified for each intersection that was projected to exceed the LOS D standard in each scenario. Mitigation measures (3.3/ 6.0 ~ 9.0 and 11.0) for Impacts 3.3/F, G, H, I and K were adopted to reduce impacts to each of these intersections to a level of insignificance. These mitigations include construction of additional lanes at intersections, coordination with Caltrans and the neighboring cities of Pleasanton and Livermore to restripe, widen or modify on~ramps and off-ramps and interchange intersections, and coordination with Caltrans to modify certain interchanges. The Eastern Dublin projects contribute a proportionate share to the multi-jurisdictional improvements through payment of traffic impact fees or construction of the required improvements for a credit against payment of such fees. Other mitigations (3.3/13.0 and 14.0) were adopted to reduce impacts on other identified intersections with Dublin Boulevard and Tassajara Road (Impacts 3.3/M, N). Mitigation also was included (3.3 /12.0) to address delays on EI Charro Road (Impact 3.3/L). All mitigation measures adopted upon approval of the Eastern Dublin GP A/SP continue to apply to implementing actions and projects such as the proposed Project. The individual development projects within the GP A/ SP contribute a proportionate share to funding these improvements through payment of traffic impact fees or construction of the required improvements for a credit against payment of such fees. Even with mitigations, however, significant cumulative impacts remained on several identified intersections: Santa Rita Road/l-S80 Eastbound ramps (Impact 3.3/1), Dublin Boulevard/Hacienda Drive and Dublin Boulevard/Tassajara Road (Impact 3.3/M). Upon certification of the Eastern Dublin EIR and approval of the Eastern Dublin GP A/SP, the Gty adopted a Statement of Overriding Consideration (Resolution No. 53-93), for these significant unavoidable year 2010 and cumulative impacts. Transit, pedestrians and bicycles The Eastern Dublin EIR identified significant impacts related to transit service extensions and the provision of safe street crossings for pedestrians and bicycles (Impacts 3.3/0 and P). Mitigation measures 3.3/15.0-15.3 and 16.0- 6.1 were adopted which reduced these impacts to a level of insignificance. These mitigations generally require coordination with transit providers to extend transit services (for which the GPA/SP projects contribute a proportionate share through payment of traffic impact fees) and coincide pedestrian and bicycle paths I I I I I I I I I I I I I I I I I I I with signals at major street crossings. All mitigation measures adopted upon approval of the Eastern Dublin GP A/SP continue to apply to implementing actions and projects such as the proposed Project. Fee program Prior to approval of any development in Eastern Dublin, in January 1995 the Oty adopted (and has since updated) the Eastern Dublin Traffic Impact Fee which consisted of three "categories": Category 1 was, in general, to pay for required transportation improvements in the SP / GP A project area; Category 2 was, in general, to pay for required improvements in other areas of Dublin; and Category 3 was to pay for regional improvements to which development in Eastern Dublin should contribute. The improvements for which the fee is collected included those improvements assumed in the Eastern Dublin EIR, those improvements necessary for Eastern Dublin to develop, and those improvements identified in the Eastern Dublin EIR as mitigation measures. In June 1998, the City adopted the Tri-Valley Transportation Development Fee, in conjunction with the cities of Pleasanton, Livermore, San Ramon and Danville and the Counties of Alameda and Contra Costa to fund regional improvements. This fee replaced the Category 3 fee. In addition, the City has adopted a Freeway Interchange Fee to reimburse Pleasanton for funding construction of certain interchanges on 1-580 that also benefit Eastern Dublin. All development projects in Eastern Dublin are required to pay these fees at building permit or construct the improvements included in the fee programs. SUPPLEMENTAL IMPACTS AND MITIGATION MEASURES The Dublin Ranch West development proposal, as outlined in the Project Description section, includes residential land uses and densities that are generally consistent with the adopted General Plan and Specific Plan, with the exception that 10,454 square feet of Neighborhood Conunerc:íal uses and a 9-7-acre Elementary School are proposed to be deleted from the Land Use Diagram and 217 dwellings units constructed over and above that presently allowed in the General Plan and Eastern Dublin Specific Plan. Potential impact of these proposed land use changes are addressed below. Also, as noted in the Project Description, no land use changes are proposed for the Bragg and Spersflage properties within the Project area. Updated existing intersection levels of service. Exhibit 16 shows the location of the study intersections. The existing a.m. and p.m. peak hour traffic volume counts were conducted at the 17 existing study intersections between December of 2002 and February of 2003. The existing intersection of Fallon Road/ Antone Way was not included in the existing condition analysis, because currently it primarily serves construction traffic in the area. Updated counts were taken and the subsequently analyzed in this SDEIR to determine if any changes to local or regional traffic patterns have occurred since the 1993 EDSP was certified. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 96 November 2004 Table 12 summarizes the results of the intersection level of service analysis for existing conditions. Detailed calculations are contained in Appendix B of the full traffic report. Currently, aliI? study intersections operate at acceptable service levels during the peak hours. Table 12. Exisüng Intersection LOS Levels of Service ID Signalized Intersections Count A.M. Peak Hour P.M. Peak Hour Date v/c LOS v/c LOS 1 Dougherty Road/Dublin Boulevard Feb 2003 0.66 B 0.76 C 2 Hacienda Drive/I-580 Eastbound Feb 2003 0.48 A 0.51 A Ramps 3 Hacienda DriveJI-580 Westbound Feb 2003 0.42 A 0.42 A Ramps 4 Hacienda Drive/Dublin Boulevard Feb 2003 0.28 A 0.38 A 5 Hacienda Drive/Central Parkway Ian 2003 0.32 A 0.32 A 6 Hacienda Drive/Gleason Drive Dee 2002 0.11 A 0.08 A 7 Santa RitaJI-580 Eastbound Feb 2003 0.54 A 0.54 A Ramps/Pimlico Drive , 8 Tassajara RoadJI-580 Westbound Feb 2003 0.36 A 0.39 A Ramps 9 Tassajara Road/Dublin Boulevard Feb 2003 0.25 A 0.36 A 10 Tassajara Road / Central Parkway Jan 2003 0.29 A 0.23 A 11 Tassajara Road / Gleason Drive Dee 2002 0.33 A 0.36 A 12 Tassajara Road/South Dublin Jan 2003 0.30 A 0.26 A Ranch Drive 13 Tassajara Road/North Dublin Dec2002 0.24 A 0.17 A Ranch Drive 15 Tassajara Road/Northem Project (Future Intersection) Access 16 Tassajara Road/Fallon Road (Future Intersection) 19 Fallon Road/Dublin Boulevard (Future Intersection) 20 Fallon Road/ Gleason Drive (Future Intersection) 21 Fallon Road/ Antone Way (Primarily Construction Traffic under Existing Conditions) 22 Hacienda Dr./Martinelli Feb 2003 0.25 A 0.33 A Way/Hacienda Crossings ID UnsignaIized Intersections' Count A.M. Peak Hour P.M. Peak Hour Date Delay LOS Delay LOS (see/ (see/ veh) veh) Dublin Ranch West Draft Supplemental EIR City of Dublin Page 97 November 2004 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 14 Tassajara Road/Quarry Lane School Driveway - Westbound Quarry Lane School Driveway 17 EI Charro Road/J-S80 Eastbound Ramps - Eastbound 1-580 EB Off-ramp Approach 18 Fallon Road/I-S80 Westbound Ramps - Westbound 1-580 WE Off-ramp Approach Note: vie", volume to capacity ratio; LOS", Level of Service; X.X (X.X) '" Overall Intersection Delay or LOS (Minor Movements Delay or LOS). "HCM 2000 methodology does not report the overall Intersection delay for one-way STOP i.1tersections. Source: T JKM Transportation Consultants. 2004 Dee 2002 - - - - (18.2) (C) (16.9) (C) Dee 2002 - - - - (9.8) (A) (10.1) (B) ¡an 2003 - . - - (lOA) (B) (10.2) (B) Existing Plus Approved, Baseline traffic conditions. Traffic from existing land uses have been added to anticipated traffic from approved projects in Dublin, Pleasanton and Dougherty Valley. Approved projects consist of developments that are either under construction, are built but not fully occupied, or are unbuilt but have final site development review (SDR) approval. City of Dublin staff provided a list of approved projects wiWn the jurisdiction. The City of Pleasanton and Contra Costa County were contacted in July 2002 to investigate probable projects, both north and south of the City of Dublin that potentially could impact the study intersections. Representative from the City of Pleasanton provided both land use forecasts and expected buildout traffic forecasts from their traffic model. Contra Costa County provided information related to Dougherty Valley development. The list of approved projects that are expected to generate trips at the study intersections is provided in Tables 1 and 3 of Appendix C of the Traffic Study. From Appendix C of the Traffic Study, the identified projects in Tables 1, 2 and 3 are expected to generate a total of 51,096 additional daily trips, with 4,607 trips occurring during the a.m. peak hour, and 5,365 trips occurring during the p.m. peak hour. Table 13 summarizes the results of the intersection level of service analysis for Baseline projects. Detailed calculations are contained in Appendix D of the Traffic Study. The intersection of Fallon Road/ Antone Way was analyzed beginning with this scenario. Figure Cl of Appendix C Oocated in the Traffic Study) contains a figure illustrating lane geometry and intersection control assumptions for the Baseline conditions based on information provided by the City staff. Under this scenario, all of the existing intersections are expected to continue to operate at an acceptable service level. The new intersection of Fallon Road/ Antone Way is expected to operate acceptably (LOS A) under the Baseline conditions. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 98 November 2004 Table 13. Existing + Approved (Baseline) Intersection LOS Levels of Service Signalized Intersections A.M. Peak Hour P.M Peak Hour vie LOS vie LOS 1 Dougherty Road/Dublin Boulevard 0.67 B 0.83 D 2 Hacienda Drive/I-S80 Eastbound Ramps 0.60 A 0"S7 A 3 Hacienda Drive/I-S80 Westbound 0.54 A 0.46 A Ramps 4 Hacienda Drive/Dublin Boulevard 0.35 A 0.42 A 5 Hacienda Drive/Central Parkway 0.38 A 0.41 A 6 Hacienda Drive/Gleason Drive 0.12 A 0.10 A 7 Santa Rita/I-580 Eastbound 0.58 A 0.61 B Ramps/Pimlico Drive 8 Tassajara Road/I-S8D Westbound Ramps 0.42 A 0.52 A 9 Tassajara Road / Dublin Boulevard 0.39 A 0.42 A 10 T assajara Road / Central Parkway 0.38 A 0.32 A 11 Tassajara Road/Gleason Drive 0.37 A 0.41 A 12 Tassajara Road/South Dublin Ranch 0.35 A 0.33 A Drive 13 Tassajara Road/North Dublin Ranch 0.30 A 0.21 A Drive 14 Tassajara Road/Quarry Lane School 0.37 A 0.39 A Driveway 15 Tassajara Road / Northern Project Access (Future Intersection) 16 Tassajara Road/Fallon Road (Future Intersection) 19 Fallon Road/Dublin Boulevard (Future Intersection) 20 Fallon Road/Gleason Drive (Future Intersection) 21 Fallon Road/ Antone Way 0.03 A 0.04 A 22 Hacienda Drive/Martinelli 0.30 A 0.34 A Way / Hacienda Crossings A.M. Peak Hour P.M. Peak Hour ID Unsignalized Intusections' Delay Delay sec/veh LOS sec/veh LOS El Charro Road / 1-580 Eastbound Ramps - - - - 17 - Eastbound 1-580 EB Off-ramp (14.0) (C) Approach (B) (16.6) Fallon Road/I-S80 Westbound Ramps - - - - 18 - Westbound 1-580 WE Off-ramp (12.1) (11.4) (B) Approach (B) Note: vie = volume to capacity ratio; LOS = Level of Service; Dublin Ranch West Draft Supplemental EIR City of DUblin Page 99 November 2004 I I I I I I I I I I I I /. I I I I I I I I I I I I I I I I I I I I I I I I I X.X (X-X) = Overall Intersection Delay or LOS (Minor Movements Delay or LOS)_ 'HCM 2000 methodology does not report the overall intersection delay for one-way STOP intersections. Source: TJKM Transportation Consultants, 2004 Significance Criteria. Intersections. An impact would be significant if an intersection previously mitigated to an acceptable level would now exceed acceptable levels. In addition, an impact would be significant if a new intersection is identified as exceeding acceptable levels and if such intersection was not previously identified in the Eastern Dublin EIR as a study intersection. The General Plan standard requires that the City strive for LOS D at intersections. (General Plan Circulation and Scerdc Highways Guiding Policy F). Roadway Segments. With respect to routes of regional significance, an impact would be significant if a road has been identified since certification of the Eastern Dublin EIR as such a route and such routes would fail to comply with the applicable standard of the General Plan. The General Plan requires the City to make a good faith effort to maintain Level of Service D on arterial segments of, and at the intersections of, routes of regional significance (Dublin Boulevard, Dougherty Road, Tassajara Road and San Ramon Road) or implement transportation improvements or other measures tl? improve the level of service. If such improvements are not possible or sufficient, and the Tri-Valley Transportation Council cannot resolve the matter, the City may modify the level of service standard assuming other jurisdictions are not physically impacted (General Plan Circulation and Scenic Highways Guiding Policy E [e.g. Level of Service D ). The maximum Average Daily Traffic (ADT) threshold standards of the General Plan for four-lane roadways (30, 000 vehicles per day), six-lane roadways (50,000 vpd), and eight-lane roadways (70,000 vpd) are used to determine the through lane requirements. Freeway segments. The LOS for a freeway segment can be based on upon peak hour traffic volumes (number of passenger cars per hour). Similar to intersection operations, there are six levels, ranging from LOS A being the best operating conditions, to LOS F being the worst. LOS E represents" at capacity" operation. When the volume exceeds capacity stop-and-go conditions result, and operations are designated as LOS F. The standard for freeway impacts is based upon the Alameda County Congestion Management Agency (ACCMA) mordtoring standards and is established at LOS E (volume to capacity ratio (v / c) = O. Project Trip Generation and Distribution. The Project trip generation was estimated based on rates provided in Trip Generation, 6th Edition, published by the Institute of Transportation Engineers (ITE). Table 14 summarizes the trip generation estimation for the proposed Stage 1 Development Plan for the Dublin Ranch West Project. As noted earlier, no land use changes are proposed for other properties within the Project area, so no traffic analysis has been included for Dublin Ranch West Draft Supplemental EIR City of Dublin Page 100 November 2004 Dublin Ranch West Draft Supplemental EIR City of Dublin Page 101 November 2004 I I I I I I I I I I I I I I I I I I I these properties in this section of the SDEIR As shown, the proposed Project is expected to generate 679 a.m. peak hour trips and 889 p.m. peak hour trips. The Dublin Ranch West portion of the Project site is presently designated for approximately 721 single-family housing units, 96 multi-family housing units, 10,454 square feet of commercial space and an elementary school in the Eastern Dublin General Plan and Specific Plan. Based on standard rates provided in the Institute of Transportation Engineer Trip Generation, 6th Edition ,expected trip generation for such a development would be approximately 746 a.m. peak hour trips and 957 p.m. peak hour trips (see Table 4 in Appendix C of the Traffic Study). As shown on Table 14 above, the currently proposed Dublin Ranch West Stage 1 Planned Development Plan would be expected to generate 679 a.m. peak hour trips and 889 p.m. peak hour trips. Since the trip generation is less than existing General Plan and Specific Plan land use desígnations by 67 (=- 746-679) trips during the a.m. peak hour, and by 68 (=957-889) trips during the p.m. peak hour, the Project would not be required to provide an analysis of the Alameda County Congestion Management Agency's Metropolitan Transportation System (MIS). The trip distribution assumptions (shown on Figure 6 of the Traffic Study) were developed based on existing travel patterns, knowledge of the study area and input from City staff. Trips to and from the Dublin Ranch West residential development were assigned to the study intersections based on these assumptions. Table 14. Proposed Project Trip Generation Use Size Daily AM Peak Hour PM Peak Hour Rate Tot. Rate Rate In Out Tot. Rate Rate In Out Tot. In Out In Out SF/lOR 75 957 718 0.19 0.56 14 42 56 0.65 0.36 49 27 76 SF/MDF 557 9.57 5,330 0.19 0.56 106 312 418 0.65 0.36 362 201 563 MF/ 178 6.63 1,180 .08 0.43 14 77 91 0.42 0.20 75 36 111 MHDR MF(no 224 6.63 1,485 .08 0.43 18 96 114 0.42 0.20 94 45 139 School)' Total 1,034 8,713 152 527 679 580 309 889 Source: Trip Generation, 6th Edition, by ITE LDR: : Low Density Residential (Single Family Detached, ITE Code 210) MDR: : Medium Density Residential (Single Family Detached, ITE Code 210) MHDR: : Medium High Density residential (Apartment, ITE Code 220) 'Assumes that 224 mUlti-family units will be built instead of an elementary school. Table Source: TJKM Associates Planned Roadway Improvements. The following roadway improvements are anticipated by the City of Dublin and are included in the table below. Dublin Boulevard/Dougherty Road was assumed to consist of the following lane configurations based on the improvements planned for this intersection: I I I I I I I I I I I I I I I I I I I · Northbound Dougherty Road approach would have three left-turn lanes, three through lanes, and two right-turn lanes. · Southbound Dougherty Road approach would have two left~turn lanes, three through lanes and one shared through/ right-turn lane. · Eastbound Dublin Boulevard approach would include two left-turn lanes, three through lanes and two right-turn lanes. · Westbound Dublin Boulevard approach would have three left-turn lanes, three through lanes and one right-turn lane. These improvements are included in the City of Dublin's 5-year Capital Improvement Program (CIP) and are expected to be implemented by the time the proposed Project is fully developed. The current OP project to install the improvements at Dublin Boulevard/Dougherty Road is funded by developments that are required to pay their pro-rata share of the cost to construct these improvements through payment of the Eastern Dublin Traffic Impact Fee. Supplemental Impact IRA-I. Impacts to study intersections under the Baseline plus Project conditions. With the addition of Project trips to the loc:al roadway network and assuming buildout of projects approved but not yet completed and completion of planned roadway improvements, most intersections would generally continue to operate at similar levels of service as identified under Baseline conditions. This is shown on Table 15. Some notable differences caused by the proposed Project and planned roadway improvements are given below; however, none of the following changes would result in a more significant impact at the study area intersections and are therefore considered to be less-than-significant and no supplemental impacts are anticipated. · El Charro/I-580 Eastbound Ramps - Intersection level of service would change from LOS B to LOS C during the a.m. peak. hour. · Dublin Boulevard/Dougherty Road - The a.m. peak. hour intersection operations will change from LOS B to LOS A during the a.m. peak hour and from LOS D to LOS A during the p.m. peak hour. Table 15. Baseline + Project Conditions Intersection LOS Levels of Service Signalized Intersections A.M. Peak Hour P.M. Peak Hour vIe LOS vIe LOS 1 Dougherty Road I Dublin Boulevard 0.47 A 0.56 A 2 Hacienda Drivel 1-580 Eastbound Ramps 0.60 A 0.57 A 3 Hacienda Drive/I-580 Westbound 0.54 A 0.46 A Ramps 4 Hacienda DrivelDublin Boulevard 0.37 A 0.44 A 5 Hacienda Drive/Central Parkway 0.39 A 0.41 A Dublin Ranch West Draft Supplemental EIR Page 102 City of Dublin November 2004 6 Hacienda Drive / Gleason Drive 0.12 A 0.10 A 7 Santa Rita/I-580 Eastbound 0.60 A 0.68 B Ramps/Pimlico Drive 8 Tassajara Road/ 1-580 Westbound Ramps 0.44 A 0.59 A 9 Tassajara Road/Dublin Boulevard 0.43 A 0.54 A 10 Tassajara Road / Central Parkway 0.47 A 0.45 A 11 Tassajara Road/ Gleason Drive 0.47 A 0.52 A 12 Tassajara Road/South Dublin Ranch 0.42 A 0.48 A Drive 13 Tassajara Road/North Dublin Ranch 0.44 A 0.36 A Drive 14 Tassajara Road/Quarry Lane School 0.43 A 0.38 A Driveway 15 Tassajara Road/Northern Project Access 0.67 B 0.64 A 16 Tassajara Road/Fallon Road (Future Intersection) 19 Fallon Road/Dublin Boulevard (Future Intersection) 20 Fallon Road/ Gleason Drive (Future Intersection) 21 Fallon Road/ Antone Way 0.12 A 0.13 A 22 Hacienda Drive / Martinelli 0.30 A 0.34 A Way / Hacienda Crossings A.M. Peak Hour P.M. Peak Hour m Unsign.aIized Intersections' Delay Delay sec/veh LOS sec/veh LOS El Charro Road(I-580 Eastbound Ramps - - - - 17 - Eastbound 1-580 EB Off-ramp (18.9) (C) (20.8) (C) Approach Fallon Road/l-580 Westbound Ramps - - - - 18 - Westbound 1-580 WB Off-ramp (12.3) (B) (11.9) (B) Approach Note: vie"" volume to capacity ratio; LOS = Level of Service; XX (XX) = Overall Intersection Delay or LOS (Minor Movements Delay or LOS). 'HCM 2000 methodology does not report the overall intersection delay for one-way STOP intersections. Source: T JKM Transportation Consultants, 2004 I I I I I I I I I I I I I I I I I I I Supplemental Traffic Impact TRA-2. Impacts to study intersections under Buildout conditions. The Buildout scenario includes the Baseline plus Project scenario added to full buildout of all approved developments and all land uses included in the adopted General Plans for Dublin, Pleasanton and the Dougherty Valley. It is estimated that the Buildout projects in Dublin, Pleasanton and Dougherty Valley, combined, would generate a total of approximately 376,437 additional DUblin Ranch West Draft Supplemental EIR Page 103 City of Dublin November 2004 I I I I I I I I I I I I I I I I I I I daily trips, with 27,641 trips occurring during the a.m. peak hour, and 36,989 trips occurring during the p.m. peak hour. These trips include the vehicle trips that are expected to be generated by the approved but not constructed IKEA project that is to be located at the southwest corner of Dublin Boulevard and Hadenda Drive. Trip distribution assumptions for the Buildout projects were developed based on information from other previous traffic studies, knowledge of the area, an origin and destination survey conducted in April 2003, and consultation with City staff. Traffic generated by the developments in Dublin, Pleasanton and Dougherty Valley was assigned to the roadway system using the software TRAFFIX. The assigned traffic was added to the Baseline plus Project turning movement volumes to obtain Buildout traffic forecasts. Traffic assignments used the closest proximity interchanges to access I~580 while traffic was also distributed more everùy among the interchanges in a manner consistent with the effects of ramp metering on traffic patterns in the study area. The Buildout TRAFFIX model used in this study represents the conditions of approved, pending and buildout projects (including IKEA) in Dublin, as well as approved and buildout projects within the City of Pleasanton, and Dougherty Valley in Contra Costa County. This TRAFFIX model was developed jointly by Fehr & Peers and TJKM Transportation Consultants to distribute and assign traffic to the study intersections and analyze projects in Dublin. The model was developed in order to better understand traffic on a local level, such as at key intersections and local streets, which a regional model, such as the 2025 Tri- Valley Model, does not fully consider. While the TRAFFIX model uses a local focus approach to forecast traffic within the City of Dublin, the model also takes into account regional traffic patterns by considering potential traffic diversions from I~580 to adjacent surface streets within the 1-580 corridor. The output from the TRAFFIX model is shared with other consultants to maintain consistency in the City of Dublin. The final traffic forecasts in this study were also compared to Pleasanton's forecasts at affected interchanges for consistency between models. Buildout roadway improvements Additional roadway improvements beyond those discussed previously in this report are planned within the Eastern Dublin area and are assumed in the Buildout conditions analysis. They include; Dublin Boulevard/Tassajara Road Capadty Improvements; Addition of two westbound left-turn lanes, one through lane and one right-turn lane; one northbound left-turn lane and two through lanes; one eastbound left-turn lane and one through lane; and one southbound left-turn lane. Some of these improvements have been constructed, but not necessarily opened to traffic (Eastern Dublin TIF improvement). Scarlett Drive Extension; Extension of Scarlett Drive from Dublin Boulevard north to Dougherty Road and associated intersection improvements at Dublin Boulevard/Scarlett Drive and Dougherty Road/Scarlett Drive, as identified in the Transit Center EIR (Eastern Dublin TIF improvement). With the Dublin Ranch West Draft Supplemental EIR City of Dublin Page 104 November 2004 Dublin Ranch West Draft Supplemental EIR City of Dublin Page 105 November 2004 I I I I I I I I I I I I I I I I I I I Scarlett Drive extension, it was assumed that 75 percent of the volumes for the southbound left turn from Dougherty Road onto Dublin Boulevard and the westbound right turn from Dublin Boulevard onto Dougherty Road were assumed to shift to the Scarlett Drive extension. Dublin Boulevard/Hacienda Drive Capacity Improvements: Addition of one westbound right-turn lane and conversion of a northbound right-turn lane to a third through lane (Eastern Dublin TIF improvement). Hacienda Drive Widening: Widening of southbound Hacienda Drive from one to two through lanes from Gleason Drive to Central Parkway (Eastern Dublin TIF improvement). Central Parkway Widening: Widening of Central Parkway from two to four through lanes between Arnold Road and Tassajara Road (Eastern Dublin TIF improvement) . Hacienda Drive/I-S8G Westbound 0ff~ramp Capacity Improvements: Widening of the northbound Hacienda overpass to four lanes to accommodate an exclusive lane leading to the 1-580 westbound loop on-ramp, and addition of one shared right/left-turn lane on the off-ramp approach (Eastern Dublin TIF improvement). These improvements are also identified in the Transit Center and East Dublin Properties EIRs. Hacienda Drive/I-S80 Eastbound off-ramp capacity improvement: Addition of one shared right/left-turn lane on the off-ramp approach (Eastern Dublin TIF improvement). This improvement is also identified in the East Dublin Properties (EDPO) EIR Dublin Boulevard/Dougherty Road Capacity Improvement: Addition of related ultimate improvements such as the widening of the 1-580 westbound diagonal on-ramp at Dougherty Road to two single-..occupanc:y-vehicle lanes, as identified on pages 159 and 167 of the Transit Center Draft EIR and page 3.6-17 of the East Dublin Properties Draft Supplemental EIR. These improvements are expected to occur with the development of the Transit Center project (Eastern Dublin TIF Improvement). Fallon Road Extension: Extension of Fallon Road north to Tassajara Road to include four lanes of traffic (Eastern Dublin TIF Improvement). Under this scenario, Dublin Boulevard (six lanes), Central Parkway (four ùmes) and Gleason Drive (four lanes) are assumed to be extended to Fallon Road. Table 16 summarizes the results of the LOS analysis. The detailed LOS calculations are contained in Appendix F of the Traffic Study. I I I I I I I I I I I I I I I I I I I Table 16. Intersection Level of Service under Buildout Conditions A.M. Peak Hour P.M. Peak Hour ID Signalized Intersections v/c: LOS v/c LOS 1 Dougherty Road/Dublin Boulevard 0.76 C 0.92 E 2 Hacienda Drive/l-580 Eastbound 0.73 C 0.70 B Ramps 3 Hacienda Drive/l-580 Westbound 0.82 D 0.50 A Ramps 4 Hacienda Drive/Dublin Boulevard 0.67 B 0.98 E 5 Hacienda Drive/ Central Parkway 0.57 A 0.58 A 6 Hacienda Drive/ Gleason Drive 0.32 A 0.51 A 7 Santa Rita/I-580 Eastbound 0.89 D 0.89 D Ramps/Pinùico Drive 8 Tassajara Road/l-580 Westbound 0.78 C 0.83 D Ramps 9 Tassajara Road/Dublin Boulevard 0.65 B 0.82 D 10 Tassajara Road/Central Parkway 0.67 B 0.65 B 11 Tassajara Road/ Gleason Drive 0.67 B 0.73 C 12 Tassajara Road/South Dublin Ranch 0.70 B 0.64 B Drive 13 Tassajara Road/North Dublin Ranch 0.66 B 0.52 A Drive 14 Tassajara Road/Quarry Lane School 0.64 B 0.50 A Driveway 15 Tassajara Road/Northern Project 0.64 B 0.62 B Access 16 Tassajara Road/Fallon Road 0.27 A 0.47 A 17 El Charro Road/l-580 Eastbound 0.50 A 0.74 C Ramps 18 Fallon Road/I-580 Westbound Ramps 0.51 A 0.73 C 19 Fallon Road/Dublin Boulevard 0.64 B 0.86 D 20 Fallon Road/Gleason Drive 0.30 A 0.43 A 21 Fallon Road/ Antone Way 0.24 A 0.28 A 22 Hacienda Drive/Martinelli 0.54 A 0.89 D Way / Hacienda Crossings Source: T JKM Transportation Consultants, 2004 Note: vie ~ volume to capaerty ratio; LOS ~ Level of Service; X.X (XX) ~ Overa/llntersaction Delay Or LOS (Minor Movements Dublin Ranch West Draft Supplemental EtR City of Dublin Page 106 November 2004 Dublin Ranch West Draft Supplemental EIR City of Dublin Page , 07 November 2004 I I I I I I I I I I I I I I I I I I I As shown in Table 16, twenty of the 22 study intersections are expected to operate acceptably during the AM and PM peak hours under Buildout. The remaining two intersections of Dublin Boulevard / Dougherty Road and Dublin Boulevard/Hacienda Drive are expected to operate below LOS D during the p.m. peak hour despite the planned roadway improvements. Dublin Boulevard/Dougherty Road. The Eastern Dublin EIR identified significant impacts to this intersection based on potential LOS F operations. (Impact 3.3/F.) Mitigation measure 3.3/6.0 called for future construction of additional lanes to maintain LOS D operations, with fair share funding contributions from new development in Eastern Dublin. The City has adopted an Eastern Dublin Traffic Impact Fee in compliance with this mitigation. The Project is subject to this fee, and other adopted traffic impact fees. As shown in Table 16, above, however, the intersection is projected to operate at LOS E with planned intersection improvements. This reduction in intersection operations from the Eastern Dublin EIR would be a sigr¡ificant supplemental impact. As mitigation, the Project traffic analysis recommends installation of a fourth exclusive through lane on eastbound Dublin Boulevard. However, this improvement is not feasible given the physical constraints at this intersection. Thus, intersection operations would be a supplemental significant unavoidable impact. Dublin Boulevard/HadenlÙl Drive. The Eastern Dublin EIR identified significant cumulative impacts to this intersection based on potential LOS F operations, noting that no further widening of the intersection would be feasible. (Impact 3.3/M.) Mitigation measure 3.3/13.0 called for the City to participate in regional transportation studies and funding programs. The City has so participated, and the Project will be subject to adopted regional traffic fees. As shown in Table 16 above, the intersection is projected to operate at LOS E with planned intersection improvements; this is an improved operation compared to the LOS identified in the Eastern Dublin EIR. As mitigation, the Project traffic analysis recommends installation of a fourth exclusive through lane on eastbound Dublin Boulevard. Consistent with the Eastern Dublin EIR.- and as noted above, this improvement is not feasible given the physical constraints at this intersection. With the slightly improved operation at this intersection, there are no significant impacts beyond those identified in the Eastern Dublin EIR, and thus no sup,plemental impact~ would occur. Supplemental Impact TRA-:t Cumulative increase of Project related traffic on adjacent freeways. Development in Eastern Dublin was identified as a significant unavoidable cumulative impact in the Eastern Dublin EIR (reference impact 1M 3.3/B, 1-580 freeway, I~680 Freeway-Hacienda). The cumulative daily traffic volumes projected in the Eastern Dublin EIR (reference Table 3.3-9) on the 1-580, 1-680 freeways are close to the year 2003 I I I I I I I I I I I I I I I I I I I volumes on the two freeways (per the 2003 Caltrans Traffic Volumes on California State Highways). Evaluation of freeway levels of service is a different process than intersection levels of service. Level of service for freeways is based upon peak hour traffic volumes (number of passenger cars per hour). In practice as in theory, volume, density and speed are directly correlated, and the analyst can calc:u1ate anyone of these factors knowing the other two. Traffic flow is used as the basis for freeway levels of service and for calculating the impacts of the Project on 1-580 and 1-680 operations in 2025. The forecasted Year 2025 volumes were based on the 1-580 and 1-680 mainline freeway operation analysis obtained from the Dublin Transit Center P A 00-013 Final Environmental Impact Report (September 2002), which was certified by the Dublin Oty Council in November 2002. Table 17 summarizes the forecasted volumes and expected levels of service for two scenarios in 2025: 1) conditions without the Project, and 2) conditions with the Project. Table 17. Summary of Freeway Analysis Capacity F E D E E D F D F D D E Even without the proposed Project, the study mainline segments along 1-580 and I~680 in the vicinity of the Project site would operate unacceptably under Year 2025 conditions. Consistent with the adopted Eastern Dublin mitigation measures for freeway impacts, the Project will be required to pay for its proportionate share of impacts to 1-580 and 1-680, by payment of Tri-Valley Transportation Development (TVTD) Fees to construct planned freeway Dublin Ranch West Draft Supplemental EIR Page 108 City of Dublin November 2004 Dublin Ranch Weet. Draft Supplemental EIR City of Dublin Page 109 November 2004 I I I I I I I I I I I I I I I I I I I improvements, including HOV lanes, auxiliary lanes, and interchange improvements. The Project will also pay for its proportionate share toward public transportation improvements to help reduce traffic on the freeways and other roadways in the Tri-Valley Area, by payment of the TVTD Fee; two of the improvements to be funded by the TVTD Fees are the West Dublin BART Station and the Express Bus Service from Uvermore to the East Dublin BART station. The Project's contribution of additional traffic to local freeways would be less than originally analyzed in the Eastern Dublin EIR, since fewer trips would be generated from proposed development than under the approved General Plan and Eastern Dublin Specific Plan. There are no significant freeway impacts beyond those identified in the Eastern Dublin EIR, and thus no sLtP-plemental freeway impacts would occur. Supplemental Impact 'IRA-4.lmpacts on Tassajara Road roadway segments. The Eastern Dublin EIR identified significant cumulative impacts along Tassajara Road. (Impact 3.3/N.) Adopted Mitigation Measure 3.3/14.0 called for the Oty of Dublin to reserve right-of-way for up to six future lanes and called for development to contribute proportionately to costs of improving the roadway. In July, 2004, the Oty of Dublin approved an ultimate precise alignment for the widening of Tassajara Road to six travel lanes between Shadow Hills Drive and the northerly Dublin Oty limit line. The adopted Eastern Dublin TIF is based on programmed improvements to widen Tassajara Road to six lanes, including four inside lanes to be funded through the Eastern Dublin TIF and two outside lanes to be constructed by adjacent developments as part of their frontage improvements. A roadway segment analysis was conducted to determine the number of through lanes that would be needed to have various segments of Tassajara Road operate at acceptable levels of service for all study scenarios. The average daily traffic (ADT) volumes for existing and future scenarios were estimated by assuming that the p.m. peak hour volumes were 10 percent of their daily volumes. The following three roadway segments were analyzed; 1. Tassajara Road between North Dublin Ranch Drive and Project Northern Access, Existing ADT- 9,050 vpd Existing plus Approved ADT- 10,430 vpd Existing plus Approved plus Project ADT-19,160 vpd Buildout ADT- 34,490 vpd 2. Tassajara Road between Project Northern Access and Fallon Road Existing ADT- 8,990 vpd Existing plus Approved ADT - 10,370 vpd Existing plus Approved plus Project ADT- 10,980 vpd Buildout ADT- 24,900 vpd 3. Tassajara Road between Fallon Road and Dublin/County Limit I I I I I I I I I I I I I I I I I I I Existing ADT- 8,990 vpd Existing plus Approved ADT-I0,370 vpd Existing plus Approved plus Project ADT-1O,980 vpd Buildout ADT- 31.270 vpd The roadway analysis indicates that roadways near the Project area would not accommodate Project and Buildout traffic. This would be a potentially significant supplemental impact. The roadway segment analysis concludes that Tassajara Road would need to be widened as follows to accommodate anticipated traffic. · Tassajara Road between North Dublin Ranch Drive and Project Northern Access would need to be widened to four lanes under the Existing plus Approved plus Project conditions. · Tassajara Road between North Dublin Ranch Drive and Project Northern Aœess would need to be widened to six lanes under the Buildout conditions. Tassajara Road between Project Northern Access and Fallon Road would need to be widened to four lanes under the Buildout conditions. However, this segment of Tassajara Road should be improved to six lanes under Buildout conditions to provide for continuity of traffic flow on Tassajara Road to the Dublin/ County limit. Tassajara Road between Fallon Road and Dublin/ County Line would need to be widened to six lanes under the Buildout conditions. The following measure is recommended to reduce the above impact to a less- than-significant level SupplemenW Mitigation Measure SM-TRA-l. The Project developer shall dedicate right-of-way along the Project frontage and widen Tassajara Road to four lanes between North Dublin Ranch Drive and Project Northern Access to improve roadway segment s near the Projecl Supplemental Impact TRA-5. Potential traffic safety impacts. Proposed development of the Dublin Ranch West site would add additional traffic onto Tassajara Road. Two access points are proposed as shown in Exhibit 11. The addition of anticipated traffic could result in a potentially significant supplemental impact with regard to traffic safety and design issues. Adherence to the following measures would reduce traffic safety issues to a less- than-significant level. Supplemental Mitigation Measure SM- TRA-2. The Stage 1 Development Plan for the Dublin Ranch West Project shall include the following safety features. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 110 November 2004 Dublin Ranch West Draft Supplemental EIR City of Dublin Page ", November 2004 I I I I I I I I I I I I I I I I I I I a) Install traffic signals at the two Project access roadways due to safety considerations along Tassajara Road. b) Provide an eastbound right.turn capacity on the Project main access roadway at Tassajara Road to accommodate vehicles during the a.m. peak hour. e) Provide northbound left·turn capacity from Tassajara Road onto the Project main access roadway, considering anticipated traffic movements to access the Project site during the p.m. peak hour. d) Provide an adequate northbound left·turn lane from Tassajara Road onto the Project southern access roadway, considering anticipated turning movements during the p.m. peak hour. e) Provide an appropriate southbound right-turn pocket with an adequate taper on Tassajara Road at both access roadways due to safety consideration. 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Dublin Ranch '" " '-'~Gì ~:.ia~ ~'(a) ;;«J~ 1'""251 (96) 2(O).jl' +1" '(0 ~~ 13(8)'" !1.Si æ 0-- ,,~- ~" I~on~.( FaU(llt l·580 we RampS ...~ ~:=. .....39(19) ~ ':2(6) " ,,32'7) t Ib'" ~iß " " .-- o .~ " '. ~ !!~ ~,. -:.._,~ 19 ~~_~,,~. --- -- ..- Exhibit 16 EXISTING TRAFFIC VOLUMES Dublin Ranch West Draft Supplemental EIR City of Dublin Page 113 November 2004 I I I I I I I I I I I I I I I I I I I 4.7 Utilities and Services Sewer, water, storm drainage, electricity and natural gas, and solid waste were analyzed in Chapter 3.4 and Chapter 3.5 of the Eastern Dublin EIR; in 1994, an addendum to the Chapter 3.5 analysis of sewer treatment and disposal (dated August 22, 1994) was approved by the Gty Council. SEWER Sewer issues (also referred to as "wastewater") were analyzed in Chapter 3.5 of the Eastern Dublin EIR and a 1994 Addendum to the Eastern Dublin EIR. This supplement to the EIR examines the effect of recent planning for additional wastewater disposal capacity in the Tri-Valley area. It also examines the impact of faster-than-expected growth in the Tri-Valley area and the impact on planned expansion of DSRSD's treatment plant facilities. ENVIRONMENTAL SETTING The Eastern Dublin EIR thoroughly examined wastewater collection, treatment, and disposal issues for the Eastern Dublin area. The proposed Project area currently is not served by a wastewater service provider and would require wastewater collection facilities. The Dublin San Ramon Services District (DSRSD), which owns and operates a treatment plant in Pleasanton, is identified as the future provider of collection and treatment services for the Project area. Disposal was to be provided by the Livermore Amador Valley Water Management Agency (LA VWMA), a joint powers authority composed of Livermore, Pleasanton and DSRSD, which operates a pipeline that carries treated wastewater over the Dublin grade and into East Bay Dischargers Authority (EBDA) facilities for eventual discharge into San Francisco Bay, and by the Tri-VaIley Wastewater Authority (TW A), a joint powers authority which at the time was planning for necessary disposal capacity beyond that provided by LA VWMA. At the time of the Eastern Dublin EIR, TW A was proposing to transport untreated wastewater through the Central Contra Costa Sanitary District system for treatment and disposal in Martinez. In 1994, TW A transferred authority over acquiring / constructing additional disposal capacity to LA VWMA and LA VWMA later chose as its preferred alternative the construction of a second disposal pipeline over the Dublin Grade for discharge into San Francisco Bay using EBDA facilities (1994 Addendum to the Eastern Dublin EIR). IMPACTS AND MITIGA nONS FROM THE EASTERN DUBLIN EIR The Eastern Dublin EIR identified numerous potential impacts related to wastewater. The lack of a collection system was identified as a significant impact and Mitigation Measures 3.5 / 1.0 - 5.0 generally preventing development until such facilities are constructed by developers were adopted to mitigate this impact to less than significant. Potential growth~inducing impacts of pipeline construction were mitigated by preventing the construction of facilities greater than those required for the GP A/ SP project. Inadequate treatment plant capacity I I I I I I I I I I I I I I I I I I I in DSRSD's treatment plan and inadequate disposal capacity were identified as significant impacts: both were mitigated to a less-than-significant level by mitigation measures requiring developers to obtain "will~serve" letters from DSRSD prior to issuance of grading permits; DSRSD will not issue a "will-serve" letter in the absence of treatment-plant and disposal capacity. An additional mitigation measure requires Eastern Dublin developers to prepare detailed wastewater capacity investigations. Other mitigation measures supported DSRSD, TW A and, subsequently, LA VWMA in efforts to expand treatment and disposal capacity (along with recycled water projects). Other impads to the planned TW A disposal systems and the recycled water systems related to noise, odors and potential spills also were identified and mitigated to levels of insignificance. The impact of the use of recycled water on the main groundwater basin was identified as a potential impact and a mitigation measure requiring coordination of recycled water projects with Zone 7' s salt mitigation program mitigated this impact to insignificance. Even with mitigation measures, significant impacts related to increased energy use for the sewer systems (Impact 3.5 / F, H, U) and growth-inducement (Impact 3.5/T) remained significant and unavoidable. Upon approval of the GP A/ SP, the Oty adopted a Statement of Overriding Considerations for these impacts (Resolution No. 53-93). SUPPLEMENTAL IMPACTS AND MITIGATION MEASURES The Project proposes approximately the same type and density of development assumed in the Eastern Dublin EIR. However, the Initial Study identified potentially significant changes since the Eastern Dublin EIR due to subsequent planning for additional wastewater treatment and disposal capacity. Significance Criteria. Wastewater treatment and disposal impacts are considered significant if they would require new or expanded wastewater treatment facilities beyond what was anticipated in the Eastern Dublin EIR or if there would be inadequate treatment and/ or disposal capacity to serve the proposed Project. Supplemental Impacts. Since improvements identified in the Eastern Dublin EIR will accommodate potential development of the Projed area, no supplemental significant impacts are anticipated, as further discussed below. LA VWMA is presently constructing a new treated effluent disposal facility that will adequately accommodate additional wastewater flows generated by this and other projects in the Eastern Dublin area. Based on a recent conversation with LA VWMA staff, the new disposal pipeline is nearly complete and is anticipated to be operational in approximately November 2004 (pers. comm., Vivian Housen, 9/1/04). Wastewater Treatment Plant Capacity. Wastewater generated within the DSRSD service area is direded to the District's Wastewater Treatment Plant (WWTP) located north of Stoneridge Drive in Pleasanton. The WWTP serves the cities of Dublin and Pleasanton. Anticipating that additional disposal capacity will be available following completion of the second LA VWMA pipeline (described below), DSRSD recently completed the first stage of its planned expansion to serve additional growth in its service area that added 5.5 mgd ADWF to the Dublin Ranch Wast Draft Supplemental EIR City of Dublin Page 114 November 2004 Dublin Ranch West Draft Supplemental EIR City of Dublin Page'15 November 2004 I I I I I I I I I I I I I I I I I I I treatment plant for a total of 17.0 mgd ADWF (source: Steven Delight, DSRSD 8/31/04). This expansion is consistent with Mitigation Measure 3.5 /9.0 of the Eastern Dublin EIR, which anticipated the expansion of DSRSD's treatment plant in stages, as capacity needs increased. Plant expansion is expected to provide sufficient capacity to accommodate the proposed Project. In any event, the mitigation measures in the EIR and DSRSD's inclusion of Eastern Dublin in its long-range wastewater planning ensure that the limited treatment plant capacity is a not a new significant impact. Therefore. there is no new supplemental significant impact due to treatment plant capacity. DisPQsal Capacity. As was noted in the Eastern Dublin EIR, the increase in wastewater flows resulting from the GP A/ SP requires an increase in wastewater disposal capacity. As noted above, LA VWMA, rather than TW A, is the agency charged with increasing wastewater disposal capacity for the Tri-Valley area. LA VWMA needs disposal capacity above and beyond its current pipeline to serve Eastem Dublin and other development within the Livermore/ Amador Valley. In addition, LA VWMA's existing pipeline is deteriorating. Therefore, LA VWMA is repairing its existing export pipeline, constructing a new parallel pipeline, and/ or replacing the existing pipeline to create additional disposal capacity and connecting it to the EBDA outfall. When completed the LA VWMA system will have a capacity of 41.2 MGD (8.7 Livermore, 16.25 Pleasanton and 16.25 DSRSD). If Livermore decides to pay into the expansion portion of the pipeline project in the next five years, the Pleasanton and DSRSD allocations would be adjusted to 14.4 MGD each. Design of all phases is complete and the project is under construction and is anticipated to be completed in approximately November 2004. Once the expansion is completed, the disposal capacity needed to serve the Project area would be available. Since LA VWMA's capacity expansion project has been approved by the LA VWMA Board, is adequately financed, and portions are under contract" adequate wastewater capacity is anticipated to be available when the Project area is developed. In any event, mitigation measures in the Eastern Dublin EIR ensure that development will not take place if there is insufficient wastewater disposal capacity. Therefore, there is no new significant impact due to disposal c:apadty. WATER Water service was analyzed in Chapter 3.5 of the Eastern Dublin ElR This supplement to the EIR examines whether new water supply contracts and litigation concerning the sufficiency of DSRSD and Zone 7's water supplies to serve future development are significant new impacts beyond what was analyzed in the Eastern Dublin EIR. ENVIRONMENTAL SETTING I I I I I I I I I I I I I I I I I I I No public water service currently is provided to the Project area. The residences and other land uses in the Project area use locally pumped well water. The Eastern Dublin EIR identifies DSRSD as the provider of water service to Eastern Dublin. DSRSD's long-range water planning for Eastern Dublin includes the Project area. DSRSD obtains its water supplies from Zone 7 of the Alameda County Flood Control and Water Conservation District (Zone 7), which wholesales treated local surface water, groundwater and imported water from the State Water Project to retail water agencies. IMPACTS AND MITIGATIONS FROM THE EASTERN DUBLIN EIR The Eastern Dublin EIR identified significant impacts related to the supply of water to the Specific Plan area. Mitigation measure 3.5 / 23.0 addresses possible salinity in the groundwater basin. Mitigation measures 3.5 / 24.0 - 40.0 were adopted to prevent overdraft of ground water resources by requiring or encouraging annexation and connection to DSRSD; to minimize the effect of additional demand for water by encouraging water recycling and conservation and by encouraging the development of new facilities and supplies; and to ensure the development of a water distribution system by generally preventing development until such facilities are constructed by developers. Other mitigations (3.5 / 41.0 - 43.0) were adopted to deal with the potential for reservoir failures, the potential for loss of system pressure, and noise from water system pump stations. The Eastern Dublin EIR noted that the Eastern Dublin General Plan and Specific Plan would increase demand to serve development at build-out under the then-applicable general plans and required an additional 25,000 acre- feet annually (AFA). Mitigation Measure 3.5 / 28.0 relied on Zone 7' s planning to acquire additional supplies. Impact 3.5/5 found a lack of a water distribution system and required a "will serve" letter prior to grading permit (mitigation measure 3.5 /3.8.0). Impact 3.5 / T, Inducement of Substantial Growth, was deemed to be significant even after mitigation. Upon approval of the GP A/ SP, the Oty adopted a Statement of Overriding Consideration for this significant unavoidable impact (Resolution No. 53-93). SUPPLEMENTAL IMPACTS AND MITIGATON MEASURES The proposed Project envisions approximately the same type and density of proposed development assumed in the Eastern Dublin EIR. Thus, water use related to potential development of the Project area is not expected to differ significantly from the Eastern Dublin EIR. This supplement DEIR examines whether new water supply contracts and settlement of litigation concerning the legality of a 1998 amendment to a 1994 water supyly agreement between DSRSD and Zone 7 to serve future development in Dougherty Valley would affect the sufficiency of water available to serve the Project area. Significance Criteria. Water Supply impacts are considered significant if there would be an insufficient water supply for the Project. Supplemental Impacts. No supplemental significant impacts are expected due to new water supply contracts or the settlement of the Dougherty Valley litigation Dublin Ranch West Draft Supplemental EIR City of Dublin Page 116 November 2004 Dublin Ranch West Draft Supplemental EIR City of Dublin Page 117 November 2004 I I I I I I I I I I I I I I I I I I I concerning the suffidency of DSRSD's water supplies to serve future development. Water Supply CQntracts. Pursuant to its 1994 contract with DSRSD, Zone 7 is obligated to supply water requested by DSRSD, subject to its availability. In 1994, DSRSD renegotiated its water supply contract with Zone 7. The renewed contract is for a term of 30 years and is renewable upon expiration. The agreement also provides DSRSD with the ability to secure alternative sources of water. Alternatives include: water transfers, construction of wells and pumps from the groundwater basin that Zone 7 manages, and recyded water. Zone 7 has, consistent with its contractual obligation to provide water to DSRSD and other retailers and the mitigation measures in the Eastern Dublin EIR, obtained additional supplies and entitlements to water necessary to serve its service area. Zone 7's Water Supply Planning Program sets forth its long-term water supply and facility needs through the year 2020. A twenty-year water- supply planning horizon customarily is used in the industry (see Water Code section 10631). Zone 7's Water Supply Planning Study Update (Water Transfer Associates, February 1999) identified Zone 7's water supply acquisition program. Based on input from the water retailers, cities, and agricultural users within its service area, Zone 7 estimated that by the year 2020 (near buildout of Zone 7's service area), it would need an additional average year water supply of approximately 40,400 AFA. To meet projected demands, Zone 7 identified water supply options based on average, wet and dry year scenarios. The planning program addresses potential water supply options, groundwater management, and conveyance and treatment facilities. Zone 7 has secured or is in the process of securing the identified water supplies and is planning the necessary facilities, as evaluated in the Zone 7 Water Agency Water Supply Planning Program EIR. Zone 7's long-term and drought.year protection water sources are shown in Table 18 below. DSRSD's Final Water Service Analysis for Eastern Dublin (December 2001) demonstrates that Zone 7 already has secured sufficient supplies to serve the 5,620 AFA demand of all of Eastern Dublin. Therefore, there is no supplemental significant impact due to new water supply contracts. I I I I I I I I I I I I I I I I I I I Table 18. Zone 7 Water Supply Acquisition Projects Project Name Amount Funding StatuS Term! Source Expiration Long-Term Water Supplv Sources Byron-Bethany 2 - 5,000 afa Zone 7 Completed 1998 15 years, Irrigation District Connection Fee Agt. No. A98- renewable Program 03-BYR Berrenda Mesa SWP 7,000 afa (920 Dougherty Completed Dee Until 11/20/36 Entitlement Transfer afa) (Net to Valley 1999 Zone 7) Developers SWC Amendment 19 Lost Hills SWP 15,000 afa Zone 7 Completed Dec Until 11/20/36 Entitlement Transfer Connection Fee 1999 Program SWC Amendment 20 Belridge sWP 10,000 afa Connection Fee Completed Dec Until 11/20/36 Entitlement Transfer Pre-payment 2000 SWC from North Amendment 21 Livennore Developers Drought Year Protection Semi tropic Water 3,870 afa. min Dougherty hnplemented Until 12/31/35 Storage Bank (43,000 Valley 1998 Agt. No. af) Developers A98-07-SEM sernitropic Water 1,980 afa min Zone 7 hnplemented Until 12/31/35 Storage Bank (22,000 Connection Fee 1999 Agt. No. af) Program A98-07-sEM Amendment 5ernitropie Increased 13,000 ata min Zone 7 semitropic: to Pumpbac:k Project Connection Fee Draft Agreement Program Dry~Year Options 15,000 afa Zone 7 May not be Connection Fee needed w / Program Semitropie Pumpback Import Water Convevance First ~/ 22nds of Future 7,000 ata Zone 7 Completed Dee: Until 11/20/36 SBA Contractor's Share Connection Fee 1999 SWC Program Amendment 19 Next 15/22nds of 15,000 afa Zone 7 Completed Dec Until 11/20/36 Future SBA Connection Fee 1999 w/ S-yr w/ opt out in Contractor's Share Program opt-out SWC 2005 Amendment 20 Dublin Ranch West Draft Supplemental EIR Page 118 City of Dublin November 2004 Dublin Ranch West Draft Supplemental EIR City of Dublin Page 119 November 2004 I I I I I I I I I I I I I I I I I I I SBA Conveyance 1O~50,000 afa Zone 7 CDM & ESA Alternatives, including Connection Fee Study Upgrades & Line B--4A Program Completed DWR (SBA Parallel Pipe); In- Study Agreement Valley Pipeline and Near Tenn SBA hnprovements ($7,035,000) approved 5-2-01 'Cost excludes pumping cost into Zone 7 area ($15-20/ af) SBA = South Bay Aaueduct SWC = State Water Contract Sources: (1) Zone 7, Alameda County Flood Control and Water Conservation District, 2001 (2) City of Dublin Eastern Dublin Properties Supplemental EIR . January 2002 Water Supply Litigation. In 1998, DSRSD and Zone 7 entered into an amendment to their water supply agreement that permitted DSRSD to expand its service area to include the Dougherty Valley Service Area. The expansion process included various approvals by Zone 7 and DSRSD and the purchase from third parties of State Water Project entitlements. Following the approvals, Gtizens for Balanced Growth ("Otizens") and the Oty of Livermore ("Livermore") filed separate lawsuits challenging the legality of the amendment to the water supply agreement. The litigation was concluded by a multi-party settlement agreement (the "Settlement Agreement"). DSRSD also entered into a "Memorandum of Understanding Regarding Cooperative Implementation of Agreement to Settle Water Litigation" with the Oty of Dublin in December 1999. Although the Oty was not a party to the litigation or the Settlement Agreement and the litigation did not concern Dublin or the territory in the Eastern Dublin GP A/ SP area, Section 4 of the Settlement Agreement obligates DSRSD upon receipt of a Notice of Preparation of an EIR concerning a project in Eastern Dublin, to prepare a preliminary water service analysis and a preliminary impact analysis which analyzes the water-related impacts of the proposed Project. Two of the parties to the Settlement Agreement, Otizens and Livermore, may comment on the adequacy of the documents and may engage DSRSD in a dispute-resolution process pursuant to the Settlement Agreement. The Settlement Agreement anticipates that, at the conclusion of the dispute- resolution process, final analyses will be produced. The information provided by DSRSD to the Oty pursuant to this Settlement Agreement process is intended to assist the Oty in its CEQA review and land use approval process for development projects in Eastem Dublin. The level of analysis required by the Settlement Agreement is significantly more detailed than is required under CEQA or any other state or local law. The Oty land use application review and LAFCO annexation processes are independent of the requirements of the Settlement Agreement, which is binding on the parties to the agreement only. I I I I I I I I I I I I I I I I I I I As required by the Settlement Agreement, DSRSD has prepared' and has submitted to the City a Progranunatic Water Service Analysis ("PWSA") and preliminary impact analysis for the proposed Dublin Ranch West Project. As required by the Settlement Agreement, the PWSA demonstrates that: · The water demand for the Project area is set forth in DSRSD's most recently adopted Urban Water Management Plan (adopted May 2000): . Total firm sustainable water supplies (as defined in the Settlement Agreement) that reasonably may be expected to be available to DSRSD will meet the projected water demand associated with the Project, together with all other existing uses and uses under build-out of the applicable general plans for all areas lying within DSRSD's water service area, as and when demand is expected to arise. This conclusion is based on Zone 7's contractual obligation to provide DSRSD with sufficient water to serve DSRSD's customers, along with an analysis of Zone 7's available resources in the future; · During a "credible worst case drought scenario" (as defined in the Settlement Agreement), providing water to the Project area will not significantly and adversely affect the reliability of water service to DSRSD's existing customers; and . During a "credible worst case drought scenario" (as defined in the Settlement Agreement), providing water to the Project area will not significantly and adversely affect the quality of water service to DSRSD's existing customers. With the submittal of the Water Service Analysis and execution of the memorandum of understanding, DSRSD has complied with the terms of the Settlement Agreement, and there is no supplemental significant impact due to water supply litigation. Water Demand. DSRSD recently commissioned an analysis of anticipated water use for the proposed Project, with and without proposed amendments to the General Plan and Eastern Dublin Specific Plan. The report is entitled "Integration of Proposed Dublin West Annexation Area into District's Potable and Recycled Water Systems," dated December 31, 2003. The report concludes that with the construction of planned infrastructure system elements in the Eastern Dublin area, adequate potable and recycled water would be available to serve the proposed Project, with or without the proposed Specific Plan Amendment. Table 19 shows anticipated potable water demand at build out of the proposed Project compared to DSRSD's 2000 Water Master Plan. Table 19 shows that anticipated potable water demand for the Dublin Ranch West property, including the replacement of the Elementary School site with residential uses, would be somewhat less than anticipated in the District's 2000 Master Plan. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 120 November 2004 DUblin Ranch West Draft Supplemental EIR City of Dublin Page 121 November 2004 I I I I I I I I I I I I I I I I I I I Table 20 shows that the anticipated use of recycled water for the Project area would be less than anticipated in the Master Plan, even if the currently planned Elementary School site were to be replaced with residential dwellings. In sum, there would be no supplemental significant impacts for water demand for the proposed Project. STORM DRAINAGE Storm drainage was analyzed in Chapter 3.5 of the Eastern Dublin EIR. This supplement analyzes whether storm drainage facilities needed to serve the Project area would exceed those previously identified. ENVIRONMENTAL SETTING The Project area is within the Alameda Creek watershed, which drains to the San Francisco Bay. Zone 7 is responsible for master planning, overseeing construction coordination and maintaining major storm drain channels and culverts for this area. The City has jurisdiction and maintenance responsibility over local storm drains that discharge to the Zone 7 flood control system and would be responsible for the approval of local storm drainage facilities. Drainage on the Project area drains to Tassajara Creek which flows southerly to connect with Zone 7 facilities south of 1-580. South of the Project area, Tassajara Creek has been improved or has existing capacity to accept the design flow as determined by Zone 7. IMPACTS AND MmGATION FROM TIlE EASTERN DUBLIN EIR The Eastern Dublin EIR identified potential flooding related to increased runoff to creeks (1M 3.5 / Y). Adopted mitigation measures required the construction of drainage facilities designed to minimize erosion and flooding and requiring the preparation of storm drainage master plans for all development applications in Eastern Dublin (:MM 3.5/44.0----48.0). The potential for reduced groundwater recharge due to increased impervious surfaces (1M 3.5/ Z) was mitigated by water quality planning and Zone 7 recharge programs (MM 3.5 / 49.0-50.0). The potential for increased non-point source pollution due to development (1M 3.5 / AA) was addressed in mitigations requiring compliance with storm water quality programs (MM 3.5/51.0-55.0). SUPPLEMENTAL IMPACTS AND MITIGATION MEASURES The proposed Project envisions approximately the same type and density of potential development assumed in the Eastern Dublin EIR. Therefore, the proposed Project is not anticipated to contribute substantially greater quantities of stormwater runoff than originally analyzed. Pursuant to the Initial Study, this supplement analyzes whether new storm drainage facilities required to serve the Project area exceed those analyzed in the Eastern Dublin EIR. I I I I I I I I I I I I I I I I I I I Significance Criteria. Storm drainage impacts are considered significant if the Project area would require new stoml drainage facilities substantially in excess of those that were anticipated in the Eastern Dublin ElR. Supplemental Impacts. No supplemental impacts are anticipated. Storm drainage facilities described in the Eastern Dublin EIR will accommodate potential development of the Project area. SOLID WASTE Solid waste was analyzed in Chapter 3.4 of the Eastern Dublin EIR. This supplement analyzes whether rapid development in the Tri-Valley area would have significant impacts on the availability of solid waste services beyond those identified in the Eastern Dublin ElR. ENVIRONMENTAL SETTING Livermore Dublin Disposal Service/Valley Waste Management (LDDS/VWM) provides solid waste collection and recycling service to the Project area. The 1995 franchise agreement between LDDS/VWM and the Oty of Dublin expires in 2005 and is subject to renewal for three years. The franchise agreement states that LDDS / VWM has sufficient capacity in the Altamont Landfill and Resource Recovery Facility to account for development within the Eastern Dublin Specific Plan and the General Plan Amendment areas. Solid waste collected by LDDS/VWM is transported to the Altamont Landfill and Resource Recovery Facility in unincorporated Alameda County. The landfill is receiving approximately 6,000 tons of solid waste from the LDDS!VWM service area per day. The estimated remaining capacity at the landfill is approximately 9 million cubic yards. This is anticipated to provide landfill capacity for 5 or 6 more years. In 2000, the Alameda County Board of Supervisors and the Alameda County Waste Management Authority approved expansion of the landfill. The expansion would add an additional 40 million cubic yards of capacity which would provide approximately 23 to 25 additional years of service. IMPACTS AND MmGA nON FROM THE EASTERN DUBLIN EIR The Eastern Dublin EIR addressed the impact of increased solid waste production and the impact on solid waste disposal facilities. (See Impacts 1M 3.4/0 and 1M 3.4/P.) It was specifically noted that the Eastern Dublin Project could accelerate the closing schedule for the Altamont Landfill. The Eastern Dublin EIR found the impacts to be potentially significant. The impacts were reduced to the level of insignificance by mitigation measures that required the preparation of a comprehensive solid waste management plan for Eastern Dublin and that prevent approvals of development UfÙess sufficient or a reasonable expectation of adequate landfill capacity is available to accommodate Project wastes. Mitigation measures 3.4/38.0-40.0 requiring preparation of a Solid Waste Management Plan were adopted to reduce these impacts to a level of insignificance. All mitigation measures adopted upon approval of the GPA/SP Dublin Ranch West Draft Supplemental EIR City of Dublin Page 122 November 2004 Dublin Ranch West Draft Supplemental EIR City of Dublin Page 123 November 2004 I I I I I I I I I I I I I I I I I I I continue to apply to implementing actions and projects such as the proposed Project. SUPPLEMENTAL IMPACTS AND MITIGATION MEASURES Significance Criteria. Solid waste impacts are considered significant if the Project requires disposal capacity in excess of the current solid waste management capadty. Supplemental Impacts. No sloWplemental impacts regarding solid waste disposal capacity are anticipated from the rapid development of the Tri-Va1ley area. When the previous EIR was certified, expansion of the Altamont landfill had not yet been permitted. Since the previous EIR expansion of the landfill has been approved to provide long-term disposal for development under the Eastern Dublin GP AI SP, including the current Project area. LDDS/VWM does not foresee any problems in collecting or disposing of the solid waste or recyclable materials generated by the proposed Project (Nick Perata, LDDS personal communication, 6/2/03). In addition, the increase in solid waste and recyclable materials would be accommodated at the Altamont Landfill and Resource Recovery Facility (Nick Perata, LDDS personal communication, 6/4/03). Thus, there are no significant impacts beyond those analyzed in the Eastern Dublin ElR. ELECTRICITY AND NA1URAL GAS Elec:tridty and natural gas service was analyzed in Chapter 3.4 of the Eastern Dublin EIR. This supplement to the EIR analyzes whether the recent energy crisis and other local factors prevent an adequate supply of electricity. ENVIRONMENTAL SETTING Padfic Gas & Electric Company (pG&E) provides electricity and natural gas to the Project area. Existing dwellings and other structures within the Project area are presently receiving service from PG&E. At the statewide level, California recently went through an energy crisis resulting from its deregulation of electridty markets. The crisis appears to be related to the regulatory factors and a lack of an adequate supply of electricity. At the local level, PG&E's recently completed a new regional substation in the Tri-Valley which provides necessary electrical service to new developments in the Eastern Dublin area (source; Buck Jones, PG&E, 4/'22./04). IMPACTS AND MITIGATION FROM THE EASTERN DUBLIN EIR The Eastern Dublin EIR identified three potential significant impacts related to electricity and natural gas. Two of these impacts, Impact 3.4 / Q Demand for Utility Extensions and 3.4/5 Consumption of Non~Renewable Natural Resources, were deemed to be potentially significant impacts that would remain significant even with mitigation. Upon approval of the Eastern Dublin GP A/ SP, the City I I I I I I I I I I I I I I I I I I I adopted a Statement of Overriding Considerations for these significant unavoidable impacts (Resolution No. 53-93). SUPPLEMENTAL IMPACTS AND MITIGA nON MEASURE The Project proposes approximately the same type and density of potential development assumed in the Eastern Dublin EIR. The Initial Study for this Project identifies the current uncertainty regarding supply of energy, including electricity and natural gas, to serve the proposed Project as a potentially signífkant impact. Significance Criteria. Energy consumption impacts are considered significant if gas and electricity supplies are insufficient to serve the Project from existing entitlements and resources. Supplemental Impad UTS 1. Local Elecmcal Dismbution Constraints. Based on a recent discussion with PG&E staff, the substation has been approved and is anticipated to be operating in December 2004 or soon thereafter (source: personal communication with Bu.:kJones, PG&E 3/11/ /03). With construction and operation of the Tri-Valley 2002 Capacity Increase Project the there would be a less-than-significant impact with providing necessary electrical resources to the Project site. Supplemental Impad UTS 2. A vailabiIi'Qr of N amral Gas Supplies. Recent discussion with PG&E natural gas service planners indicate that adequate long.tern natural gas supplies exist from PG&E to serve the level of development that could be allowed in the Project area. Although limited natural gas delivery systems exist in and near the Project area, Project developers would be responsible for extending natural gas infrastructure to serve future development (source: personal communication with Sheila Cebalos, PG&E natural gas service planner 6/3/03). Supplemental Information in Response to Notice of Preparation (NOP) The following information is supplied based on responses received by the City of Dublin from the Notice of Preparation distributed for this DSElR. Surface Water Quality Impacts (Regional Water Quality Control Board) Although any proposed development within the Project area will be subject to surface water quality mitigation measures adopted as part of the Eastern Dublin ErR, development projects will also be required to comply with updated surface water quality standards, included in the Alameda Countywide Oean Water Program or successor documents as may be adopted by the City of Dublin and Regional Water Quality Control Board, in effect that the time such specific individual development projects are submitted to the City of Dublin. Dublin Ranch West Draft Supplemental EIR Page 124 City of Dublin November 2004 Dublin Ranch West Draft Supplemental EIR City of Dublin Page 125 November 2004 I I I I I I I I I I I I I I I I I I I Hydrologic and Hydraulic Analysis (Zone 7) The City of Dublin will require developers of future individual projects to submit hydrology and hydrologic analyses to identify specific increases in storm water runoff into Tassajara Creek. Such reports will be reviewed by both the City of Dublin and Zone 7 Water Agency. Main Basin Salt Loading (Zone 7) The salt loading from development within the Project area to the main ground water basin is caused mainly by the use of reclaimed water irrigation systems. (David Lund, Zone 7). Salt loading to the Main Basin from this project development is considered by Zone 7 to be "minimal, to no" impact. This impact is more of a regional salt-water management problem, because it results from the accumulation of all existing and proposed irrigation system improvements of the entire region. In 1999, Zone 7 adopted a Salt Management Plan that will completely offset salt loading that would otherwise take place. Zone 7 is actively implementing the Salt Management Plan over the next several years. The plan includes demineralizing shallow groundwater with high salt content and reinjecting it into the groundwater basin; the resulting salty brine is to be piped out of the basin through the LA VWMA disposal facility. (Zone 7, Salt Balance Annual Report, June 20, 2001.) Zone 7 has addressed the salt loading impacts to the main groundwater basin and the mitigations needed in a joint ACWD- DERWA study. Based on this study Zone 7 has included the construction of brine processing facilities as part of their Capital Improvement Program that is currently being funded by Zone 7 fees. The City will continue to work with Zone 7 and with the other agencies to resolve the problem. The funding for mitigations of salt loading will be paid for with increased water and sewer rates of Zones 7 and DSRSD. All development within the Project area will pay for mitigation of increased salt loading impacts through the payment of their water and sewer hook up fees and water rates. This complies with Eastern Dublin EIR MM 3.5 / 23.0, which required recycled water projects to be coordinated with any salt mitigation requirements of Zone 7. I I I I I I "1::1 I ~ .. ~ .. I .. ... to :: a¡ I - .:> £ .. ... .. Q ,5 ~ - 11 I ~ i -e '';; -" = . I .. i c=: ;¡¡ c ... - I ,J:> ::I ~ 0\ .... I .. - ,J:> to Eo< I I I I I I ;¡~ ¡¡ J !. -:~~~~a¡;88agg¡;:;g;; ~j lOçiDÐciðOOgCi~dð - i ~ .! 0. = :-t; ~'¡J; i~~~~~~~$~~~~~~~ ;¡;iig,..C.:>c>c~~~eo~g i .. IE ~&15 . 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'- ::!!: :n:;=:~ ~~ LI'ò 1"\ " _~] c!lli.... v-i e ".¡ N ~ ~ :D ~ ..,. ¢r"'I"ONOON' .- Æ '''' ê·- ..., ê ...... i8 = ~;- iii 1..: ~¡;;¡"it :: ~ V'1,...: ... -~ .= ;¡ jj~ . ~ 'II ii i~.,;1€::8~8::;!8æ:8¡;::¡ li:ciôciOøQC:~iCÎC>QG;¡. - ~! h" =- ~! ~ "- . . r~ ==1" ¡:¡. ~ I " "" g ~....... - "" ~ :;¡.. 'III,. C;i.....1IÇi ~ C:'" W'Ì e:i C;i Q"": "1. - - ~ ~.¡ !"tI .. .Ii ~ J . . .æ ; ~ ~ .; -i ~~ 11 i1 ~~!!~~;~!!_ i go. . '!! -i .= " ,,- 1 .... .. !r ~~!i~ ,~ ~~~~j~~~5~~~ýi~~ " _ . it I ~,:. i ,OJ!! ~ ~ ~ E '" ¡¡ ~ ¡ I ¡r Sits....... h~ ~;;UH~l "" Ii¡ 1iililJlilJ1t1iliill Š "'~rnq;:¡~;;n~::I:q~~~ ..:l~ìiÎ;;:;:;¡:¡;;;:::;::¡;::r;;¡¡;;::: f. it J j.a...-=f'I;"".:II::!~III!.:",*;-=""!""!II:!:J .5.i"':!:!""V'lD~"'C.CC>CI~ l ~ ~ PIUUgHU¡¡ ~ g "..~Pi"," ytl"!~ i!"'''-'''''~-ê--:1 t$~-V)-....- ~æ I iii Jf ~ ;, 'i U) ".!!"g ~ :i. HH~J - ~ ...~ ~~:i-;i; ~ 1-·-~ ;Iij..a t '" 1.. i · ~ b-_ g --..'- ¡¡Ii--.:! :>- ~hH~ ,;"h hÆ:'U .H~~· 2 '~d1iUU~ ;! 5 ~,tf~h~nn :; CI) [;;g ~o "'''' C>~ '" '" c..~ E g:> o Z c: ill $ <::: '" E '" ì5. c. " en '" ~ c t; '" 5: .1:.<: (.'I;::: <:::J:>. '" " c:c .5õ ñ>- :3:= co I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 4.8 Schools The need for new school facilities was analyzed in Chapter 3.4 of the Eastern Dublin EIR. This Supplemental EIR examines whether student generation rates and the need for new school facilities has substantially changed since certification of the EIR. This supplement also examines the effect of Senate Bill 50, enacted in 1988, on the provision of school facilities. ENVIRONMENTAL SETTING The Project area lies within the Dublin Unified School District (DUSD). Enrollment in DUSD schools was 4,459 K-12 students in October 2003. This is based on the Dublin Unified School District Study of Demographic Projections and School Revenue Analysis, Draft, 2004, prepared by Shilts Consulting. Inc, July 2004. DUSD maintains five elementary schools, a middle school, a high school and a continuation high school. District enrollments have steadily increased over the past 10 years, at an average rate of approximately 2.5% for a ten year growth of 28%. On April 20, 2004, the District's Board of Trustees adopted Resolution No. 2003 /04-37 declaring that the Elementary School site shown on the Dublin Ranch West site under the existing EDSP is no longer required as an Elementary School by the District. The Resolution notes that the Project developer is still required under the terms of an existing school mitigation agreement for the Dublin Ranch development Project to construct and dedicate without charge Fallon Middle School, to construct and dedicate to the District without charge Green Elementary School and to convey to the District a school site known as E-3 within the Town Center of the Dublin Ranch. This obligation could be met through credits against development impact fees. lIMP ACTS AND MITIGATION FROM THE EASTERN DUBLIN EIR The Eastern Dublin EIR projected the demand for school facilities that would be generated by adoption and implementation of the General Plan and Eastern Dublin Specific Plan. At the time the Eastern Dublin EIR was certified, DUSD had not adopted student generation rates for all levels of school facilities. The adjoining Livermore Valley Joint Unified School District however, had recently adopted increased generation rates for single and multi-family development for all school facilities for grades K~12. These student generation rates were used in the Eastern Dublin EIR for school impact purposes. Based on projected student generation, the Eastern Dublin EIR identified potentially significant impacts related to the demand for new school facilities and the potential for overcrowding if the demand was not met (Impacts 3.4/ F, G and H). The EIR also identified impacts on financing school facilities (Impacts 3.4/1 and J). Mitigation measures were adopted to reserve school sites within the Project area, to coordinate new development with school facilities planning and Dublin Ranch West Draft Supplemental EIR City of Dublin Page 128 November 2004 Dublin Ranch West Draft Supplemental EIR City of Dublin Page 129 November 2004 I I I I I I I I I I I I I I I I I I I to encourage the broadest possible funding mechanisms for new school facilities (MM 3.4/13.0-19.0). These mitigation measures reduced impacts to a level of insignificance. All mitigation measures adopted upon approval of the Eastern Dublin GPA/SP continue to apply to implementing actions and development projects. SUPPLEMENTAL IMPAcrS AND MmGATION MEASURES The proposed Project includes approximately the same general type of land use as included in the Eastern Dublin General Plan and Specific Plan, however, the GP A/ SPA and the associated Stage 1 Development Plan would eliminate a planned 9.7-acre elementary school site and replace this land use designation with Medium High Density Residential that would allow development of up to 224 dwellings and replace a 0.8-acre site designated for Neighborhood Commercial with an Open Space land use designation. Significam:e Criteria. School impacts are considered significant if any of the following conditions were to occur: · If student generation rates have increased such that the demand for new school facilities would exceed the projections for new school facilities as identified in the Eastern Dublin EIR; · If the number of new dwelling units proposed would generate a significantly greater number of students than anticipated in the Eastern Dublin EIR, or as identified by DUSD; · If proposed school financing did not comply with the provisions of SB 50. Supplemental Impacts. Two potential supplemental impacts are identified based on the proposed Project: an increase in the number of school-aged students that could be generated by the proposed development program over and above student generation anticipated in the Eastern Dublin EIR and loss of an elementary school that is currently proposed to accommodate students that would be generated in the Eastern Dublin Specific Plan area, including the Project area. Supplemental Inwact SCH·l. Additional Student Generation. Approval and construction of the proposed Project would generate more school aged students than anticipated in the Eastern Dublin Specific Plan and Eastern Dublin ElR. Table 21 summarizes anticipated school generation based on existing residential land use designations compared with proposed residential land uses. Students that could be generated from the Bragg and Sperfslage properties have not been included in the following table, since no land use changes are proposed for these properties. I I I I I I I I I I I I I I I I I I I Table 21. Existing and Proposed Student Generation, Dublin Ranch West Project Land Use Gen. Existing SP L¡md Use Proposed SP Land Use Rate' (mid-point density> (mid-point density> Units # Students Units # Students Low Density 0.74 80 59 75 56 Medium 0.25 641 160 557 139 Density Med. High 0.13 96 13 402 52 Density - Totals -- 817 232 1034 247 . Student Generation rates provided by Dublin Unified School District. July 2004 Based on conversations with DUSD demographic consultants, an anticipated increase of 15 K-12 students would result with implementation of the proposed Dublin Ranch West Development Plan. This increase would be less-than- §ignj.ficant. Proposed Project students could be accommodated at Fallon Middle School (K-8) and Dublin High School (9-12). Fallon Middle School is planned by the District to house K-8 students through the 2007-08 school year, when additional K-6 schools in the Eastern Dublin area would become operational. Fallon Middle School is presently being planned to accommodate 1,000 students and would be located southwest of the Project site. Dublin High School, which has a current enrollment of approximately 1,270 students, is being planned for phased expansion to 2,300 students (source: personal communication, Brian Aas, Shilts Consulting, 3/14/03). Su.pplementaI Impact SCH-2. Loss of Elementary School site. As part of the proposed Project, a 9.7-acre elementary school site located in the approximate center of the site would be converted to housing units. By adopting Resolution No. 2003/04-37, the Dublin Unified School District has declared that the planned Elementary School site is not required to provide educational services on the Project site or within Eastern Dublin and that adequate education facilities will be provided under an existing agreement with the developer of Dublin Ranch. Deletion of the Elementary School site would therefore be a ~ than-significant impact. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 130 November 2004 Dublin Ranch West Draft Supplemental EIR City of Dublin Page 131 November 2004 I I I I I I I I I I I I I I I I I I I 4.9 Parks and Recreation Parks and recreation facilities were analyzed in Chapter 3.4 of the Eastern Dublin EIR. This Supplemental EIR examines whether proposed changes in the number and size of local parks as part of the proposed Dublin Ranch West Project would substantially change environmental impacts identified in the Eastern Dublin EIR. The location of trails in the vicinity of the proposed Project is also addressed. ENVIRONMENTAL SETTING The Eastern Dublin EIR identifies existing Oty facilities and park standards and East Bay Regional Park District facilities. City facilities and standards The City of Dublin's inventory of park and recreational facilities is composed of neighborhood and community facilities, community parks and community centers. Table 3.4.4 contained in the Eastern Dublin EIR identifies parks in the Oty of Dublin existing at the time the Eastern Dublin General Plan Amendment and Specific Plan was approved. No Oty park or recreational features existed near the Project area at that time; instead, these facilities existed to the west, within the then-urbanized portions of Dublin. Park and open space standards for the Oty was 2.5 acres of active parkland per 1,000 residents at the time the EDSP was adopted. Regional facilities Regional parkland and open space facilities in the Tri-Valley and adjacent areas within Alameda and Contra Costa Counties are provided by the East Bay Regional Park District (EBRPD). EBRPD owns property just south of the Project area on the west side of Tassajara Road. The District controls, through a combination of ownership and easements, the Tassajara Creek Regional Trail Corridor, which is located south and west of the Project area. This Corridor currently contains 22.8 acres of land with minimal facilities, consisting of a picnic table, restrooms, and a bridge over Tassajara Creek. The District had originally planned to construct a regional trail just west of the Project area on Parks RFfA land that would extend from Dublin Boulevard to the south, extending along the west side of Tassajara Creek and then extending north just inside the easterly boundary of Parks RFfA. This trail would then run northward through Contra Costa County to Mt. Diablo. Recently, the District has modified the proposed trail alignment to extend along Tassajara Creek within the Project area. IM:P ACTS AND MITIGATIONS FROM THE EASTERN DUBLIN EIR I I I I I I I I I I I I I I I I I I I The Eastern Dublin EIR identified a number of impacts related to parks and recreational facilities. Impact 3.4 / K indicated that increased demand for parks as a result of buildout of the EDSP would represent a significant impact on the ability of the City of Dublin to provide park service for future residents. It would also be a potentially significant cumulative impact for the community due to lack of sufficient city-wide park facilities that would not meet a standard of 5 acres of parkland per 1000 population.l\-1itigation Measures 3.4/20.0-28 were included in the Eastern Dublin EIR to reduce this impact to a less-than-significant level. These measures call for the acquisition and development of new parks and other outdoor facilities in Eastern Dublin, requiring land dedication and/ or park in-lieu fees for new subdivisions and similar techniques to provide for additional park and recreational features. Implementation of all of the mitigation measures identified in the Eastern Dublin EIR would result in a ratio of 6.7 acres of parkland per 1000 population in Eastern Dublin. Impact 3.4/ L identified a park facility fiscal impact on the City of Dublin. The fiscal strain of providing new park facilities would be a potentially significant impact.l\-1itigation Measures 3.4/29.0-31.0 would require that each new development in Eastern Dublin provide a fair share of parks and open space facilities. Development of a parks implementation plan was also called for, to identify and prioritize parkland in Eastern Dublin. Finally, adoption of a park in- lieu fee program was required as a mitigation measure to reduce this impact to a level of insignificance. Consistent with these mitigations, the City requires residential project developers to dedicate parkland at the time of subdivision approval and pay Public Facility Fees (which includes park in-lieu fees) to fund both the development of neighborhood and community park facilities as well as other community facilities. Developer(s) of the Dublin Ranch West Project would pay Public Facility Fees at the time building permits are issued for individual dwelling units. Impacts 3.4 / M and N dealt with the regional trail system and open space connections. Development of residential and commercial areas in Eastern Dublin was anticipated to have a potentially significant impact to the construction of a regional trail system (Impact 3.4/M). Adherence to Mitigation Measure 3.4/32.0 would require the establisrunent of a trail system with connections to planned regional and subregional trails, including the Tassajara Creek north-south trail to Mt. Diablo and would reduce this impact to an insignificant level. Urban development along stream corridors and ridgelines would adversely impact outdoor recreational opportunities for future Dublin residents and £otentially obstruct the formation of an interconnected open space system (Impact 3.4/N). Adherence to Mitigation Measures 3.4/33.0-36.0 would reduce this impact to an insignificant level. These measures call for use of natural stream corridors and major ridgelines to create a comprehensive, integrated trail system that allows safe and convenient pedestrian access, and required developers to dedicate public access along ridgetops and stream corridors to accommodate trail and staging areas. Dublin Ranch We$!. Draft Supplemental EIR City of Dublin Page,32 November 2004 Dublin Ranch West Draft Supplemental EIR City of Dublin Page 133 November 2004 I I I I I I I I I I I I I I I I I I I SUPPLEMENTAL IMPACTS AND MITIGATION MEASURES The Eastern Dublin Specific Plan identifies two neighborhood parks and one neighborhood square on the Dublin Ranch West property. This totals approximately 14.6 gross acres of parkland. In addition, the Specific Plan identifies 70 acres of open space both along the Tassajara Creek stream corridor through the site and on steep hillside areas within the Project area. Several parks and recreation regulatory documents have been adopted since adoption of the Eastern Dublin General Plan Amendment and Specific Plan. These include an updated Oty of Dublin Parks and Recreation Master Plan, the Eastern Dublin Comprehensive Stream Restoration Program and the East Bay Regional Park District Master Plan. City of Dublin Parks and Recreation Master Plan In February 2004, the Oty of Dublin adopted an updated Parks and Recreation Master Plan. The original Master Plan was adopted in 1994. The purpose of the Master Plan is to establish goals, long-term policies and standards to guide the City of Dublin in the acquisition, development and management of Dublin's park and recreation facilities for the next twenty years following adoption (page 3). The Master Plan depicts the approximate location of future parks, by type, design standards for parks and recreation facilities, the location and design of trail and parks and recreation maintenance and operations. The Master Plan also establishes standards of 1.5 acres of neighborhood parkland and 3.5 acres of community parkland (total of 5.0 acres) per 1,000 residents (Master Plan Table 1). The Master Plan uses net acres, rather than gross, to depict park facilities. Based on a discussion with the City's Park & Community Services Director, the Dublin Ranch West site is planned to contain 10.5 net acres of Neighborhood Parks and Squares (communication with D. Lowart, Dublin Parks and Community Services Department 11/1/04). A proposed Oass 1 pedestrian/bicycle trail (separate from roads) is shown along the west side of Tassajara Creek and a Oass 2 Bicycle Lane (bicycle lane on road) along Tassajara Road. The Oty has constructed several parks in Eastern Dublin as residential construction has occurred. Phase II of Emerald Glen Community Park has also been constructed at the southwest corner of Tassajara Road and Gleason Road. Emerald Glen Park now encompasses approximately 30 acres. A third development phase of this park is now underway with two additional phases anticipated for the future. A second community park is being planned in Eastern Dublin that would be bounded by Lockhart Lane, Gleason Drive, Fallon Road and Central Parkway. This is anticipated to include approximately 60 acres of land and would include primarily active sports fields. I I I I I I I I I I I I I I I I I I I Eastern Dublin Comprehensive Stream Restoration Program As required by the Eastern Dublin Specific Plan, the City of Dublin prepared a Comprehensive Stream Restoration Program in 1996. The purposes of this Program include establishment of streambank setbacks adjacent to Eastern Dublin creeks, provision of interface between development and creekbanks, provide for trails, connectivity and maintenance access adjacent to creeks, provisions for plant and animal habitat restoration within and adjacent to creeks, provision for protection of specimen trees, ensuring flood hazard protection adjacent to creeks, protection of surface water quality, ensuring channel stability, promote use of reclaimed water to irrigate restoration plantings and ensuring compliance with regulatory programs and requirements. Figure 8 contained in the Stream Restoration Program calls for development of a combination regional trail and maintenance road along the west side of Tassajara Creek, extending from the EBRPD park south of the project, along Tassajara Creek and into Contra Costa County to the north. A wildlife setback of 100 feet (minimum) is recommended from top of bank of Tassajara Creek. A varying width hydrological setback is also recommended from the top of creek bank; however, the regional trail and maintenance road may extend into this setback area. Section 5.2 of the Plan (Trails and Maintenance Roads) notes that "trails and maintenance road planning should encourage a continuous open space network that integrates large natural open space areas, the stream corridors, and developed parks and recreation areas. The trails and open space network should then link regional and local trails, employment centers, residential areas, schools, parks, commercial centers, neighborhood centers and open space." Design and construction standards for trails and maintenance roads are provided in the Plan document. East Bay Regional Park District Master Plan In 1997, the East Bay Regional Park District adopted a Master Plan to define the mission and vision of the District. The Master Plan also explains the District's responsibilities and explains a framework for the decisions of the Board of Directors and staff. Accompanying the Master Plan is a map entitled "East Bay Regional Park District-Existing and Potential Parklands and Trails." The map depicts a future regional trail along a portion of Tassajara Creek, extending in an east~west direction along Dublin Boulevard, turning north along Tassajara Road, extending along the east side of Parks RFTA and then extending north into Contra Costa County. The District has recently modified the trail location from Parks RFTA to the Project site along Tassajara Creek. Significam:e Criteria. Park impacts are considered significant if construction of the proposed project would result in a demonstrable increase in the use of a local or community park, playground or recreational facility, or would conflict with an adopted agency park and recreation regulatory document, such as a park and recreation master plan. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 134 November 2004 Dublin Ranch West Draft Supplemental EIR City of Dublin Page 135 November 2004 I I I I I I I I I I I I I I I I I I I Supplemental Impacts. Potential supplemental impacts identified in this DSEIR include adequacy of neighborhood parkland within the proposed Dublin Ranch West project and consistency of the proposed trail location with adopted regulatory plans. Adequaçy of nei¡;:hborhood parks. Construction of land uses as shown in the proposed Project would result in a potential supplemental impact over and above those addressed in the Eastern Dublin EIR dealing with the adequacy of local neighborhood parks within the proposed development since the Project includes elimination of planned parkland. There would also be an inconsistency with the City of Dublin's Park and Recreation Master Plan. The proposed Stage 1 Development Plan identifies one 8.7-acre (gross) Neighborhood Park, which is estimated to provide approximately 6.8 net, usable park acres, and 81.7 acres of open space within and adjacent to Tassajara Creek and on the western hillside areas. Much of the proposed Open Space-designated land would include land lying within Tassajara Creek or steeply sloping areas along the westerly portion of the property adjacent to Parks RFr A and would not be conducive to active recreation pursuits. No areas devoted to Neighborhood Squares are proposed. Based on information provided by the Dublin Parks and Community Services Department (conversation with D. Lowart, 11 / 1 /04), the applicant for this Project has agreed to provide an additional 1.8 net acres of Neighborhood Park within the Dublin Ranch development east of the proposed Project, which would be over and above the park requirement for that development. The City of Dublin has agreed to credit this overage to the proposed Dublin Ranch West Project. Supplemental Impact PARK-l. Inconsistency with the City of Dublin General Plan, Eastern. Dublin Specific Plan, and Park and Recreation Master Plan ("Plans') regarding provision of park acreage. With regard to rroposed parks identified in the Plans, there would be a deficit of 1.04 net acres 0 Neighborhood Parks in the Project area. This is based on a net requirement of 10.5 acres for Neighborhood Parks, subtracting the proposed 7.66-acre Neighborhood Park proposed for the Project and further subtracting the 1.8 acres of parkland provided elsewhere in Eastern Dublin. Thus, there would be a deficit of 1.04 acres of land designated for Neighborhood Park on the Project site resulting in insufficient total potential parkland under the Plans. In this instance, inconsistencies with the Plans regarding provision of neighborhood park facilities would result in a supplemental potentially significant impact, since the total amount of parkland shown in the Project area would not be consistent with these regulatory documents. There would be a shortfall of 1.04 acres (net) of land designated for Neighborhood Park and Neighborhood Square on the Project site from the Parks and Recreation Master Plan. I I I I I I I I I I I I I I I I I I I The following measure is proposed to mitigate this impact to a less-than- significant level: Supplemental Mitigation Measure PARK-I. Prior to tentative map or Stage 2 Development Plan approval, whichever occurs first, the Project developer shall either: a) Revise the land use program for the Dublin Ranch West site to provide an additional 1.04 net acres of Neighborhood Parks land use designation; or b) Provide 1.9 net acres of Neighborhood Park land use designation in dose proximity to the Project site. Provision of Trails. The proposed Stage 1 Development Plan for the Project (see Exhibit 11) would provide for approximately 10 acres of permanent open space along the Tassajara Creek stream course and elsewhere in the Project area greater than called for in the Eastern Dublin Specific Plan. Over eighty-one (81) acres of open space would be provided rather than 70 acres as shown in the existing Specific Plan. The proposed Stage 1 Development Plan would also provide for a local (subregional) trail adjacent to Tassajara Creek. This would be in addition to the planned EBRPD regional trail. The location and design of the local recreational trail would be determined as part of Stage 2 Development Plan reviews and necessary approvals from all appropriate biological regulatory agencies would be obtained prior to commencement of trail construction. This would include but would not be limited to the Army Corps of Engineers, U.S. Fish and Wildlife Service, State Department of Fish and Game, California Regional Water Quality Control Board. Therefore, the proposed Project would comply with mitigation measures dealing with the regional trails system and open space connections identified in the Eastern Dublin EIR and no supplemental impacts have been identified. The proposed trail location would also be consistent with the General Plan and Eastern Dublin Specific Plan, the recently updated City of Dublin Parks and Recreation Master Plan, the Eastern Dublin Comprehensive Stream restoration Program and the East Bay Park District 1997 Master Plan. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 136 November 2004 Dublin Ranch West Draft Supplemental EIR City of Dublin Page 137 November 2004 I I I I I I I I I I I I I I I I I I I 5.0 Altematives to the Proposed Project The California Environmental Quality Act requires identification and comparative analysis of feasible alternatives to the proposed Project which have the potential of achieving most of the project objectives, but would avoid or substantially lessen any significant impacts of the project. The following discussion considers alternative development scenarios. Through comparison of these alternatives to the preferred project, the advantages of each can be weighed and considered by the public and by decision-makers. CEQA Guidelines require a range of alternatives "governed by the rule of reason" and require the EIR to set forth a range of alternatives necessary to permit a reasoned choice. 5.1 Alternatives Identified in the Eastern Dublin EIR The Eastern Dublin EIR was prepared for a General Plan Amendment encompassing approximately 6,920 acres of land and for a Specific Plan for 3,328 acres within the General Plan Amendment area. The General Plan Amendment and Specific Plan (GP A/SP) proposed a variety of types and densities of housing, as well as employment-generating commercial, campus office and other land uses. Other portions of the planning area were designated schools, open space and other community facilities. Protection for natural features of the planning area, including riparian corridors and principal ridgelands, was provided through restrictive land use designations and policies. The land use plan reflected the Eastern Dublin Project objectives as set forth in the Eastern Dublin EIR, Section 2.5. As required by CEQA, the Eastern Dublin EIR identified project alternatives that could eliminate or reduce significant impacts of the Eastern Dublin Project. The four identified alternatives included: No Project, Reduced Planning Area, Reduced Land Use Intensities and No Development. These are described below; No Project Alternative. The No Project alternative evaluated potential development of the GP AI SP area under the then-applicable Dublin General Plan for the unincorporated portion of the planning area under the Alameda County General Plan. Reduced Planning Area Alternative. The Reduced Planning Area Alternative evaluated development of the Specific Plan as proposed, but assumed development beyond the Specific: Plan only to the Dublin Sphere of Influence boundary. The effect of this alternative was to exclude Upper and Lower Doolan Canyon properties from the project. Reduced Land Use Intensities Alternative. The Reduced Land Use Intensities Alternative evaluated potential development of the entire GP A/ SP area, but reduced some higher traffic generating commercial uses in favor of increased residential dwellings. I I I I I I I I I I I I I I I I I I I No Development. The No Development Alternative assumed no development would occur in the planning area other than agricultural, open space and similar land uses then in place. The Dublin Oty Council certified the Eastern Dublin EIR on May 10, 1993, under Resolution No. 51-93. The Oty Council found the No Project, Reduced Land Use Intensities and No Development alternatives infeasible and then approved a modification of the Reduced Planning Area Alternative rather than the GP A/SP project as proposed (Resolution No. 53-93). This alternative was approved based on Oty Council findings that this alternative land use plan would reduce land use impacts, would not disrupt the Doolan Canyon community, would reduce growth-inducing impacts on agricultural lands and would reduce traffic, infrastructure and noise impacts of the originally proposed Eastern Dublin Project. Even under this alternative project, however, significant unavoidable impacts would remain. Therefore, upon approval of the GP A/ SP, the Oty Council adopted a Statement of Overriding Considerations (Resolution No. 53- 93). Alternatives selected for analysis in this supplemental document include: · Alternative 1: "No Project" (required by CEQA to be considered). · Alternative 2: Reorganization and Development of Dublin Ranch West under existing Eastern Dublin General Plan and Specific Plan Land Use designations · Alternative 3: Reorganization and Development of Dublin Ranch West with Neighborhood Commercial (NC) and Public/Semi-Public (P-SP) land uses Alternatives are described and evaluated below. 5.2 No Project CEQA requires an analysis of a "no Project" alternative. Under this alternative, it is assumed that all of the properties would remain in the unincorporated portion of Alameda County and no development would occur on any of the parcels comprising the Project area. Dwellings and other structures would remain as they currently exist. However, the Tassajara Creek Conservation Area would be implemented, since this open space area is a required mitigation for loss of wetlands and habitat elsewhere in Eastern Dublin. This alternative would avoid the range of environmental impacts described in the Eastern Dublin EIR, including: · Aesthetics and Light and Glare: There would be no aesthetic change to the Project area. Open spaces views and vistas would remain as they pres~tly exist. Existing levels of light and glare, although minimal, would remam. · Air Quality: Existing source of air emissions would remain. There would be no short-term air quality impacts associated with construction of new buildings and other public and private improvements envisioned in the Dublin RanCh West Draft Supplemental EIR City of Dublin Page '38 November 2004 Dublin Ranch West Draft Supplemental EIR City of DUblin Page 139 November 2004 I I I I I I I I I I I I I I I I I I I Master Plan. The Project's contribution to long-term, cumulative air quality emissions would not change, since no new auto traffic would be attracted to the site. · Biological Resources: There would be less-than-significant impacts to existing onsite biological resources, since only limited additional development would occur within the Project area that would be allowed under the East County Area Plan (ECAP) and Alameda County zoning standards. · Cultural Resources: There would be no impacts to cultural resources since construction and disruption of the soil would not occur. · Geology and Soils: Limited or no excavation, grading or related impacts would occur so that significant erosion impacts would not occur. Existing building improvements would be exposed to the potential for seismic hazards. · Water and Hydrology: Existing hydrologic and drainage patterns would remain unchanged. · Land Use: Land use within the Project area would remain as presently constituted, including existing buildings, agricultural and other uses. Future development within the Project area would be governed by Alameda County standards, which would be limited to large lot residential and agricultural. · Noise: Existing noise generators on and near the Project area would remain as currently constituted. · Population and Housing: There would be limited increases in on-site population over current area population as allowed under the Alameda County Area Plan and zoning designations. · Transportation, parking and drculation: Existing traffic generation and use of nearby streets would continue as currently found. Widening of Tassajara Road along the Dublin Ranch West Project frontage would be funded by other projects. · Utilities and Community Services: No new or increased demand would be created for utilities and community services, since the existing level of development would remain. · Recreation: There would be very limited increased use or demand for local or regional recreational facilities since the population of the site would not significantly increase. The No Project alternative would not meet Project objectives of annexing presently unincorporated properties into the City of Dublin and Dublin San Ramon Services area, nor the objective of constructing up to 1,034 dwelling units on the Dublin Ranch West site within the Project area. 5.3 Alternative 2: Reorganization and Development Under Existing General Plan and Eastern Dublin Specific Plan The second alternative assumes that all of the properties would annex to the City of Dublin and DSRSD. Development on the Dublin Ranch West property would occur as envisioned in the Eastern Dublin Specific Plan and would include 817 residential units (a mix of Low Density, Medium Density and Medium High Density dwellings types), 10,454 square feet of Neighborhood Commerdal floor I I I I I I I I I I I I I I I I I I I space, two Neighborhood Parks (11.8 acres), a Neighborhood Square (2.8 acres) and 70 acres of Open Space. No development is anticipated for the Bragg or Sperfslage properties. Anticipated impacts of Alternative 2 would be: · Aesthetics: Anticipated aesthetic impacts related to the implementation of Alternative 2 would be the same as included in the Eastern Dublin EIR. With adherence to mitigation measures set forth in the Eastern Dublin EIR, all aesthetic impacts of the proposed Project would be reduced to a level of insignificance. · Air Quality: Alternative 2 would generate the same air quality impacts as analyzed in the Eastern Dublin EIR. Although dust emissions during construction phases of the Project and mobile sources of CO could be mitigated to an insignificant level, impacts related to vehicle emissions from construction equipment, mobile sources of ROG and NOX and stationary source emissions could not be mitigated to an insignificant level. · Biological Resources: The same general type and level of impacts would be created as the proposed Project since approximately the same area of development would occur within the Project area. Impacts to upland species and habitat areas would be reduced to a less-than-significant level through adherence to mitigation measures set forth in Section 3.7 of the EDSP EIR and supplemental mitigations that would need to be developed to apply to the California Tiger Salamander, Congdon's Tarplant and other species and their habitats that have been state or federally listed since certification of the Eastern Dublin ElR. Although portions of T assajara Creek could be impacted to accommodate Specific Plan land uses, adherence to mitigation measures contained in the Eastern Dublin EIR would reduce these impacts to a level of insignificance. · Land Use: Land use impacts in the Project area and surrounding areas would be the same as analyzed in the Eastern Dublin EIR. Significant and unavoidable land use impacts regarding the cumulative loss of agriculture and open space lands were identified in the Eastern Dublin EIR and would apply to this Alternative. · Population and Housing: The same amount on-site population and non- residential (commercial) space would be created under Alternative 2 as identified and analyzed in the Eastern Dublin EIR. All population and housing impacts associated with the adoption of the General Plan Amendment and Specific Plan could be reduced to an insignificant level. · Transportation and Circulation: Proposed development of Dublin Ranch West under Alternative 2 would be the same as analyzed in the Eastern Dublin EIR. Significant and unavoidable traffic and transportation impacts would remain under with regard to the 1-580 and 1-680 freeways, 1-580 freeway interchanges at Tassajara Road, Fallon Road and Airway Boulevard, cumulative freeway traffic, Santa Rita Road/I-58D eastbound intersection ramps, and cumulative impacts to Tassajara Road. All other traffic and transportation impacts could be mitigated to a level of insignificance. Dublin Ranch West Draft Supplemental EIR City of Dublin Page 140 November 2004 Dublin Ranch West Draft Supplemental EIR City of Dublin Page 141 November 2004 I I I I I I I I , I I I I I I , ,. I I · Utilities and Community Services: These impacts were examined in the Eastern Dublin EIR, with the exception of demand for utility extensions and consumption of non-renewal natural resources, all utility and community service impacts could be reduced to a level of insignificance with adherence to mitigation measures identified in the Eastern Dublin ElK · Recreation: The same type and level of intensity related to park and recreation impacts would occur under Alternative 2 as discussed in the Eastern Dublin ElK All recreation impacts could be reduced to a level of insignificance with adherence to mitigation measures identified in the Eastern Dublin EIR. This alternative would not meet the Project objectives to increase residential development potential on the Project site and to protect Tassajara Creek by removing nearby urban-type land uses. This alternative would also retain the current 9.7-avre planned Elementary School site that the Dublin Unified School District has determined is no longer needed. 5.4 Alternative 3: Reorganization and Development of Dublin Ranch West with Revised Neighborhood Park Location Alternative 3 assumes that all of the properties would annex to the City of Dublin and DSRSD. Development on the Dublin Ranch West property would include the same uses as the proposed Project, including 1,034 dwellings at varying densities, but would also include relocation of an approximate 7.76-acre (net) neighborhood park on the southerly portion of the Project site. The CUITent 8.7 acre (gross) park site would be designated for residential uses; but as noted above, the designation "swap" would not increase the number of proposed units. Preliminarily, the park would be located on either side of Tassajara Creek and could include softball or soccer fields, a tennis complex, volleyball facilities, picnic areas and potential off-street parking. This alternative would also include a 1.2-acre site for a future Public/Semi-Public facility, which is not specified. The proposed general plan amendment, spedfic plan amendment and Stage 1 Planned Development prezoning requests would need to be modified to accommodate Alternative 3. Anticipated impacts associated with this alternative would include: · Aesthetics: Anticipated aesthetic impacts related to the implementation of Alternative 3 would be the same as the Project, since approximately the same amount of development would occur. The proposed relocated neighborhood park would need to be reviewed for consistency with the Eastern Dublin Comprehensive Stream Restoration Program. With adherence to mitigation measures as set forth in the Eastern Dublin EIR and Specific Plan Community Design standards, all aesthetic impacts would be less-than-significant. · Air Quality: Alternative 3 would generate the same air quality impacts as the proposed Project. Although dust emissions during construction phases of the Project and mobile sources of CO could be mitigated to an I I I I I I I I il I I I I I I I I I I insignificant level, impacts related to vehicle emissions from construction equipment, mobile sources of ROG and NOX and stationary source emissions could likely still not be mitigated to an insignificant level. Ozone emissions and the Project's contribution to regional, cumulative air quality would also be significant and unavoidable impacts. · Biological Resources: Since the same area of land would be disturbed for development in Alternative 3 as the proposed Project, impacts to biological resources would be approximately the same. The design of the proposed relocated neighborhood park would need to be reviewed to ensure that storrnwater runoff and use of landscape care products are limited to minimize runoff and related water quality impacts to Tassajara Creek. · Land Use: Land use impacts in the Project area and surrounding areas would be approximately the same as analyzed in the Eastern Dublin EIR, since current land use designations include neighborhood park use. The proposed park adjacent to Tassajara Creek would likely be more consistent with the proposed Open Space designation that would be applied to the Creek corridor than the Project's proposed residential uses. Additional amendments would be needed to the General Plan and Eastern Dublin Specific Plan to accommodate the relocated park under this alternative. · Papulation and Housing: Population and Housing impacts under Alternative 3 would be the same as the proposed Project, since the dwelling unit count would be the same. · Transportation and Circulation: Minimal if any additional traffic would be expected under Alternative 3 than the proposed Project, since the number of dwelling units would not change from the proposed Project. Minor but less-than-significant increases could be expected for the proposed 1.2-acre Public/Semi-Public use on the site under this Alternative. The Project's traffic contribution to local freeways would continue to be significant and unavoidable. · Utilities and Community Services: Implementation of Alternative 3 would result in approximately the same impacts as under the proposed Project since generally the same land use pattern would be implemented. Demand for utility extensions and consumption of non-renewal natural resources would likely still be a significant and unavoidable impact as identified in the Eastern Dublin EIR. · Recreation: A somewhat lesser impact to local and regional recreational resources would occur under Alternative as the proposed Project since a larger park would be provided (7.66-net acres under Alternative 3 versus 6.8 net acres in the proposed Project). The amount of local park deficit would be reduced from 1.9 acres in the proposed Project to 1.04 net acres under Alternative 3. The relocated neighborhood park would also provide for enhanced recreation opportunities near Tassajara Creek and the multi- use trail. The amount of parkland proposed in this Alternative would still not comply with the acreage of Neighborhood Park and Neighborhood Square facilities anticipated for the Dublin Ranch West property in both the EDSP and City of Dublin Park and Recreation Master Plan and Supplemental Mitigation P ARK-I would apply to this Alternative. DUblin Ranch West Draft Supplemental EIR City of Dublin Page , 42 November 2004 Dublin Ranch West Draft Supplemental EIR City of Dublin Page 143 November 2004 I I I I I I I I I I , t I I I I I I I This alternative would meet the Project objectives of constructing additional residential dwelling units within the Project area by using the existing Elementary School site no longer needed by the school district. This alternative would provide additional protection and an amenity to Tassajara Creek through construction of a neighborhood park adjacent to the creek rather than residences. A greater amount of parkland would also be provided, although a deficit would still occur. It is generally consistent with the General Plan and Eastern Dublin Specific Plan intent for urban development on the Project site but would still require amendments to the General and Specific Plan would be needed for modified land use types and locations. 5.5 Environmentally Superior Alternative Section 15126 (d) (4) of the State of California CEQA Guidelines states that if the environmentally superior alternative is the "No Project" alternative, the EIR shall also identify an environmentally superior alternative among the other alternatives. Alternative 1, the No Project alternative, would result in fewer and less intensive environmental impacts than either the proposed Project or Alternatives 2 or 3, and would therefore be the Environmentally Superior Alternative. As between the remaining alternative, Alternative 2 would result in slightly less traffic impacts but would not provide protection for Tassajara Creek by modifying existing land use designations within and adjacent to the creek. Alternative 3, which would contain an approximate 7.7-acre neighborhood park on either side of Tassajara Creek, would provide greater protection for Tassajara Creek and enhance aesthetic qualities adjacent to the Creek. This Alternative would require modifications to the General Plan and Specific Plan Amendments to implement. Therefore, Alternative 3 would be the next most Environmentally Superior Alternative. I I I I I I I I I I I I I I I I I I I 6.0 Required CEQA Discussion This section of the DEIR addresses the potential cumulative impacts of implementing the proposed Project, as required by CEQA. 6.1 Cumulative Impacts Cumulative impacts are defined by CEQA Guidelines (Section 15126.2) as those which taken individually may be minor but, when combined with similar impacts associated with existing development, proposed development projects and planned but not built projects, have the potential to generate more substantial impacts. CEQA requires that cumulative impacts be evaluated when they are significant and that the discussion describe the severity of the impacts and the estimated likelihood of their occurrence. CEQA also states that the discussion of cumulative impacts contained in an EIR need not be as detailed as that provided for the Project alone. A number of cumulative impacts were identified in the Eastern Dublin EIR. Those related to this Project include: · Cumulative loss of agricultural and open space lands (Impact 3.1/F) · Cumulative degradation of 1-580 freeway operations between Tassajara Road and Fallon Road (Impact 3.3/ A) · Cumulative degradation of 1-580 freeway operations between 1-680 freeway and Dougherty Road (Impact 3.3/B) · Cumulative degradation of 1-580 freeway operations between Tassajara Road and Airway Boulevard Impact 3.3/C) · Cumulative degradation of 1-680 freeway operations north of 1-580 (Impact 303/D) · Cumulative degradation of 1-580 east of Airway Boulevard and between Dougherty Road and Hacienda Boulevard (Impact 3.3/D) · Cumulative degradation of Dublin Boulevard intersections with Hacienda Drive and Tassajara Road (Impact 3.3/M) · Cumulative degradation of Tassajara Road intersections with Gleason Road, Fallon Road and Transit Spine (renamed to Central Boulevard) (Impact 3.3/N) · Increased solid waste production and impact on solid waste facilities (Impact 3.4 0 and P) · Future lack of wastewater treatment plant capacity (Impact 3.5/E) · Increase in demand for water (Impact 3.5/ Q) · Direct habitat loss (Imapct3.7/ A) · Loss or degradation of botanically sensitive habitat (Impact 3/7/ C) · Construction equipment/vehicle emissions (Impact 3.11/B) · Mobile source emissions of reactive organic gasses and oxides of nitrogen (Impact 3.11/e) · Stationary source emissions (Impact 3.11/E) Dublin Ranch West Draft Supplemental EIR City of Dublin Page 144 November 2004 The Project would create one more severe cumulative significant impact beyond that identified in the Eastern Dublin EIR. This is Supplemental Impact AQ-3, exceedances of Bay Area Air Quality Management District's thresholds of significance for ozone precursors. 6.2 Significant and Unavoidable EnvironmentallInpacts Unavoidable significant adverse impacts are those impacts that cannot be mitigated to a less-than-significant level. CEQA requires decision-makers to balance the benefits of a proposed Project against its unavoidable impacts in considering whether to approve the Project. If the benefits of the proposed Project outweigh the anticipated unavoidable impacts, the adverse environmental impacts may be considered acceptable by the Lead Agency. To approve the Project without significantly reducing or eliminating an adverse impact, the Lead Agency must make a Statement of Overriding Consideration supported by the information in the record. Upon approval of the Eastern Dublin Project, the Oty Council adopted a Statement of Overriding Considerations for the significant unavoidable impacts identified in the Eastern Dublin EIR. (Resolution 53-93, May 10, 1993.) Any approval of the current Project would likewise require adoption of a Statement of Overriding Considerations for the significant unavoidable supplemental impacts identified in this DSElR, i.e., Supplemental Impacts AQ-3 (regional ozone air quality emission), AQ-3 (cumulatively considerable regional air emissions) and TRA-2 (p.m. peak hour impacts to the Dougherty Rd/Dublin Blvd. and the Hacienda Dr./Dublin Blvd. intersections under Buildout conditions). Pursuant to the recent Citizens for a Better Environment case, the Statement of Overriding Considerations would also be required to address the significant unavoidable impacts from the Eastern Dublin EIR that are related to the Proj ect. Significant and unavoidable impacts identified in this Supplement are all cumulative impacts. These impacts were also previously identified as cumulatively significant and unavoidable in the Eastern Dublin EIR. Dublin Ranch West Draft Supplemental EIR City of Dublin Page '45 November 2004 I I I I I I I I , I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 7.2 References The following documents. in addition to those included in the Appendix, were used in the preparation of this DEIR. Amphibians and R~tile S..pecies of Special Concern in California. California Department of Fish and Game. Jennings, Mark R. and M. P. Hayes, 1994 California's Wildlife. Volume I-ill: Amphibians and Reptiles. Birds. Mammals. California Statewide Wildlife Habitat Relationships System. California Department of Fish and Game. Sacramento. Zeiner, D. C, W. F. Laudenslayer, Jr., K. E. Mayer, and M. White, 1990 Biological Resources R~orts. Casamira Valley. Dublin. California. Wetlands Research Associates, 2003 a1;y of Dublin Eastern Dublin General Plan Amendment and Specific Plan. 1993, Wallace Roberts and Todd, as amended at' of Dublin Eastern Dublin General Plan Amendment and Specific Plan EIR 1993, Wallace Roberts and Todd, including supplements a1;y of Dublin Revised Draft Supplemental Environmental Impact Report. 2002 Electronic Inventory of Rare and Endangered Vascular Plants of California. California Native Plant Society, 2004 Distribution of the San Toaqµin Kit Fox in the North part of its range. H. T. Harvey & Associates, Inc., 1997 Dublin Ranch West. California Ti~er Salamander survey and salva&"e ~ort. Winter 2003-2004. Prepared for Ms. Jennifer Un c/o Martin Inderbitzen, H.T. Harvey & Associates, Inc., 2004 Dublin Ranch Tassajara Creek Conservation Area Habitat Management Plan. Prepared for Martin W. Inderbitzen, H.T. Harvey & Associates, Inc., March 2003 Dublin Ranch West Rare Plant Surveys Report (Summer 2002-Summer 2003), Prepared for Ms. Jennifer Un c/o Martin Inderbitzen, H.T. Harvey & Associates, Inc., 2003 Dublin Ranch West Biological Resources R~ort, Prepared for Ms. Jennifer Un c/o Martin Inderbitzen, H.T. Harvey & Associates, Inc., 2002 Dublin Ranch San Toaquin Kit Fox Survey (Revised). H.T. Harvey & Associates, Inc., 1997 Dublin Ranch West Draft Supplemental EtR City of Dublin Page 147 November 2004 I I I I I I I I I I I I I I I I I I I Dublin Ranch West Draft Supplemental EIR City of Dublin 8.0 Appendices Page '49 November 2004 I I I I I I I I I I I I I I I I I I I Appendix 8.1 Initial Study Dublin Ranch West Draft Supplemental EIR City of Dublin Page 150 November 2004 I I I I I I I I I I I I I I I I I I I Initial Study Project Wallis Ranch ReorgalÙzation and Development P A 02-028 Lead Agency: City of Dublin February 2003 .~ Table of Contents I. I I I I I I I I I I I I I I I I I I Introduction................................ .......:....................................................... .......................2 Applicant/Contact Person ................................... .... .................................................... .....2 Project Location and Context............................ ..................... ......... ...-.............................2 Project Background and Description ...............................................................................3 Evaluation of Environmental Impacts.................................................................. 14 Earlier Analyses ..................... .......... ...................................... ........_......... ....... .....25 Attachment to Initial Study ............................................................................._....26 1. Aesthetics ....................................... ......................... ............ .....................27 2. Agricultural Resources.... .........................................................................29 3. Air Quality ...............................................................................................30 4. Biological Resources.. ..............................................................................31 5. Cultural Resources ..... ................ .... .................................... .................. ....32 6. . Geology and Soils...............................................................................;....34 7. Hazards and Hazardous Materials.........._.._...............................................37 8. Hydrology and Water Quality..........-................................................._.....39 9. Land Use and Planning ...........................................,................................43 10. Mineral Resources............................................... ......................... ............43 II. Noise ................ ............................ ....................... .......... ....................... ....44 12.. Population and Housing...........................................................................45 13. Public Services. ........... .............................. ................... ............................46 14. Recreation ..................................................... ...........................................48 15. T ransportationfTraffic ...................... ..-. ....................... ..............................49 16. Utilities and Service Systems...................................................................51 17. Mandatory Findings of Significance........................................................53 Initial Study Preparer .......................................................................................................54 References ..................................................... ..... ..................................'............ ...............54 Persons/Agencies Contacted in Preparation of this Docuroent........................................54 - I I I I I I I I I I I I I I I I I I I City of Dublin Environmental Checklist/ Initial Study Introduction This Initial Study has been prepared in accord with the provisions of the California Environmental Quality Act (CEQA) and assesses the potential environmental impacts of implementing the proposed project described below. The Initial Study consists of a completed environmental checklist and a brief e)(p1anation of the environmental topics addressed in the checklist. Because the proposed project is generally based on the land use designations, circulation patterns etc. assigned to the project by the City of Dublin General Plan and Eastern Dublin Specific Plan, the Initial Study relies on a Program EIR certified by the City in 1993 for the Eastern Dublin General Plan Amendment and Specific Plan (the "Eastern Dublin General Plan Amendment and Specific Plan Environmental Impact Report, Sate Clearinghouse No. 91103064). That EIR,also known in this EIR as the "Eastern Dublin EIR," evaluated the following impacts: Land Use, Population, Employment and Housing, Traffic and Circulation, Community Services and Facilities, Sewer, Water and Storm Drainage, Soils, Geology and Seism city, Biological Resources, Visual Resources, Culmral Resources, Noise, Air Quality and Fiscal Considerations. Some of the potentially significant impacts identified in the Eastern Dublin EIR apply to the proposed project and, the¡:efore, the adopted mitigation measures also apply and are included in this Initial Smdy by ¡:efe¡:ence, However, as indicated in the environmental checklist, conditions related to agricult1lral resources, biological resources, noise, public services (schools), Transportation and Circulation and Utilities and Service Systems may have changed since the Eastern Dublin EIR was certified. Applicant/Contact Person Martin Inderbitzen 7077 Koll Center, Suite 120 Pleasanton CA 94566 Project Location and. Context The project area consists of 187.7 acres of land located in an unincotporated area of Alameda County generally bounded by the Alameda/Contra Costa line to the north, Camp Parks Reserves Forces Training Area to the west, Tassajara Road to the east and the existing Dublin City limit line to the south. EJÙ1ibit 1 shows the ¡:egional location of Dublin. E)(hibit 2 shows the project area in relation to tbe remainder of tbe City of Dublin; EJdlibit 3 shows the proposed reorganization (anne)(ation) area and current property ownerships. E)(hibit 4 shows the proposed Sage 1 PD-Planned Development proposal for the Wallis Ranch property witbin the proposed reorganization area. The entire project area is located within the City of Dublin's General Plan Planning Area and Sphere of Influence and consists of three different parcels each with a different owner. Page 2 February 2003 City of Dublin Initial StudylWal1i$ Ranch Annexation PA 02-028 The topography of the site .anges fi-om relatively steep, rolling hills in the north and westerly portions of the project area to a relatively flat elevation In the approximate center of the project area transitioning to Tassajara Creek and adjoining areas that generally forms the easterly boundary of the project area. Tassajara Creek and its immediate environs are wooded with oaks and other native vegetation. The largest property comprising the project area, the Lin parcel, is currently used for cattle grazing with It rural residence, storage yard and associated outbuildings scattered throughout the site. One of the two remaining properties (Bragg) is undeveloped and one single family residence has been constructed on the Sperfslage parcel. In 1994 the City of Dublin adopted a General Plan Amendment and a Specific Plan, whic:b addressed long-term development of approximately 4,200 acres of land east of the central portion of Dublin. The entire project site Is located in the westerly portion of that General Plan Amendment area.. The proposed project would implement land uses and other programs included in the Eastern Dublin Specific Plan. At build-out, this portion of the project's approximately 188 acres has been planned for a mixture of Low Density Residential, Medium Density Residential, Medium High Density Residential, Neighborhood Park, Neighborhood Square, Neighborhood Commercial, and Open Space in the Eastern Dublin Specific Plan. Project Background'and Description All of the subject property is located within the unincorporated area of Alameda County. The proposed project consists of: an Amendment to the Eastern Dublin General Plan and Specific Plan, a Stage 1 Development Plan application to the City of Dublin requesting a pre-zouing of the site in accordance with the City's General Plan and Eastern Dublin Specific Plan, as would be amended by this application; annexation of the project area to the City of Dublin and the Dublin San Ramon Services District (DSRSD); and execution of a Pre-Annexatîon.Agreement between the City of Dublin and the project proponents/property-owners. General PlanlSpecific PÚ1n Amendment An Amendment has been proposed to the Eastern Dublin General Plan and Eastern Dublin Specific Plan for the Un property, also known as Dublin Ranch West. Although the basic structure of land uses as currently shown on the Eastern Dublin Specific Plan would remain as presently planned, the following three major changes have been requested by the applicant: . Land uses presently shown adjacent to Tassajara Creek in the project area, which include a Neighborhood Park, Neighborhood Square and Neighborhood Commercial area, all comprising 9.9 acres of land, are proposed to be converted to Open Space. This action would be consistent with a Biological Opinion recently published by the United States Fish and Wildlife Service (July 1, 2002), restricting use of Tassajara Creek as open space for approximately 53 acres of land along a 5,200 linear foot reach of Tassajara Creek commencing from the confluence of Tassajara Creek and the "Northern Drainage." . Allowing the potential conversion of a presently planned Elementary School site presently shown on the Specific Plan to Medium-High Density residential uses. This portion of the requested Amendment wí1l be based on a determination that the planned elementary school site is no longer needed by the Dublin Unified School District for education purposes and that adequate school sites can be provided elsewhere in the Eastern Dublin area. City of Dublin Initial StudyNllallis Ranch Annexation PA 02-028 Page 3 February 2003 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I . Other minor changes to land use patterns within the Lin Property based on newer and more refmed topographic condiJions of the site. Overall, there would be a potential increase of up to 277 dwelling units, a decrease of 10,454 square feet of neighborhoOd commercial, deletion of an elementary school site and an increase of 9.9 acres of open space at full buildout of proposed land uses on the Lin property compared with the existing Specific Plan land use designation. Exhibit 3 shows proposed land uses under the requested Specific Plan/General Plan Amendment and Stage 1 PD-Planned Development rezoning for the Wallis Ranch. No changes to existing General Plan or Specific Plan land use designations are proposed for the Bragg or Sperfslageproperties included in the project area. Proposed land uses for these properties are shown on Table 1, below. . Table 1. Planned Land Uses-Bi-agg and Sperfslage Properties Ac Develo ment Potential 1.0 20 units 0.6 7,841 s . ft. 1.0 2.2 10 units Table 2 below, compares existing and proposed General Plan and Specific Plan designations on the Lin property. . Table 2. Existing and Proposed Land Use Designations-Wallis Ranch Land Use Desil!ll8tions ProDosed Desimations Existin2 DeSÚ!Dations Gross Ac. Units/Sot. Gross. Ac. Units/s.C. Low Density Residential 19.3 77 20.0 80 Medium Density Residential . 57.9 ·579 64.1 641 Medium High Density 21.9 438 4.8 96 . Residential Neighborhood Park 5.0 n.a. 11.8 n.a. Neighborhood Sauare 0.0 n.a 2.8 n.a. Open Space 80.0 n.a. 70.1 n.a. Elementarv School 0.0 n.a. 9.7 n.a. Neighborhood Commercial 0.0 . . 0.0 0.8 10,454 Subtotal 184.1 1,094 du 817 du 10.454 Sot. ._Source: MacKay and Somps, applicant planner and engineer . Stage 1 Planned Development (Prezoning) The applicant for the Un Property (Wa11is Ranch) has requested approval of prezoning. Prezoning is an action to indicate what city zoning will take effect once the annexed property becomes part of the city. The City of Dublin uses a Stage 1 Planned Development (PD) under City of Dublin Page 4 Initial Study/Wallis Ranch Annexation February 2003 PA 02-028 / Chapter 8.32 of its zoning ordinance to prezone property in accordance with the City's General Plan and, in this case, Eastern Dublin Specific Plan land use designations. Under the City's zoning ordinance a Stage 1 development plan must establish: a plan of proposed land use by type and density of use; the maximum number of dwelling units and commercial/office/industrial areas; a master landscape plan; and a prelinùnary development phasing plan. Project proponents will also apply for a Stage 2 PD for site-specific zoning and development plan approval. City approval of a Stage 2 development plan must be received to complete the PD zoning process. Historic feature Potential historic resources exist on the project site. According to the applicant, the property owner has taken steps to minimize damage to a school building and has offered to donate the structure to an appropriate historical group for purposes of preservation and public access. It is anticipated that, prior to development of this portion of the project site, the school building will be moved to another site and refurbished. The applicant has performed historic resource surveys which will be used to assess the potential impact with the follow-on environmental analysis. Infrastructure As part of the proposed development portion of the project, project developers would construct all major roadways and public infrastructure such as water, wastewater, recycled water, and storm drainage facilities required to support future development. Major roadways would be constructed to and through the project area with project proponents potentially utilizing assessment districts, the City's Traffic Impact Fee program" or other appropriate financing mechanisms to help fund construction. Grading activities would occur within the project area to accommodate planned land uses, roads and utilities, although the amount of grading will not be established until the Stage 2 Planned Development when detailed site and grading plans are developed. Water, sewer and recycled water services would be provided to the area by DSRSD, once the proposed reorganization (annexation) is complete, in accordance with plans formulated by DSRSD and the City's General Plan and Eastern Dublin Specific Plan. The project developers would continue the extension of these services throughout the project area as it is developed. Water distribution main¡¡ are planned to be located in all major streets. Construction of water storage reservoirs are not anticipated to be part of this project, although a water storage tank is proposed to be constructed near the project area. Sewer service for the project would be provided through connection to the DSRSD sewer system. When and where available, DSRSD would provide recycled water for irrigation purposes, reducing the need for potable water. All water and sewer facilities would be constructed to DSRSD standards. The storm drainage system for proposed development on the Wallis Ranch would fiow into Tassajara Creek, located in the westerly portion of the project area and then fiow south into the Arroyo Macho for ultimate discharge into San Francisco Bay. Future development of the Wallis Ranch will require additional hydrology and drainage studies as mandated by the eastern Dublin Specific Plan. The City of Dublin's inelusionary zoning ordinance requires that 12.5% of a project's dwelling units must be affordable to very low, low and moderate income households. Compliance could consist of constructing the required number of inelusionary units or paying an in-lieu fee to the City, or a combination of both. The project proponents will be required to comply with the City of Dublin Initial StudylWallis Ranch Annexation PA 02-028 Page 5 February 2003 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I ordinance, although the specific method generally would not be determined until the Stage 2 PD- Planned Development rezoning and related subdivision maps are reviewed. The project applicants indicate that land uses and infrastructure would be phased over a number of years to ensure that roads and other infrastrUcture facilities would be available to suppon land uses as they are needed. Proposed Reorganization (annexation) Theproject site is contiguous with the City of Dublin to the west, lies within Dublin's Sphere of Influence and within the Sphere of Int1uence of the Dublin San RanlOn Services District (DSRSD). The City's General Plan and the Eastern Dublin Specific Plan conÌffi\1Plated the eventual annexation and development of the project site in accordance with the land use designations, programs and policies of each Plan. Exhibit 4 shows the boundary of the proposed reorganization. Similarly, the project area is within the expected service area of DSRSD and all of DSRSD' s master plans for the provision and distribution of water, wastewater seIVice, and recycled water include the annexation of, and service to, the project area. Because the water, wastewater, and recycled water services are provided to the City of Dublin by DSRSD, the City and DSRSD have concurred in policy that their boundaries and Spheres of Int1uence will be coterminous (except for that portion of DSRSD's seIVice area which extends to portions of Contra Costa County). Hence, annexation of the area to the City also requires annexation of the area to DSRSD to provide needed urban services as assumed in the City's long tenn plans for the area. Pre-annexation AgreemenrlDevelopmenr Agreements The City requires that the project proponents and property owners enter into pre-annexation and development agreements with the City. Pre-annexation agreements encourage project proponents and the City to meet certain mutual obligations while the area proposed for annexation is proceeding through entitlement processes and ensure that the proposed project will not be a financial burdeh to the City. Development agreements vest development approvals for a specified period of time so that developers of large, time extensive projects have the ability to construct such projects in a time frame and under mutual obligations beneficial to the City and the project proponent. Issues typically addressed in development agreements include, but are not limited to: density and intensity of land use; timing of development; financing methods and timing of infrastructure; determination of traffic, noise, public facility and other impact fees; and obligations for construction of streets and roads. Development agreementS would be part of a later City action generally occurring with City approval of a Stage 2 Planned Development, Site Development Review and tentative subdivision map(s). City Of Dublin Initial Study/Wallis Ranch Annexation PA 02-028 Page 6 February 2003 § ~ ,; i f ~~ o . -< ð ~ Sun~~ Santa Ciaæ San Jose 17 Exhibit 1-Regional Context Wallis Ranch ReorganizationlDevelopment Plan City of Dublin I I I I I I I I I I I I I I I I I I I Uverrnol"e I I I I I I I I I I I I I I I I I I I .- .-' .-' .-' .-' .-' .-' .-' .-' -- ~ ~ i 8 Q DUBLIN co~--· cos~~ ~~'-''-''''('J) .'- .- .-' , . . . ,.... -- .-' .-- .-' .-- .-' .-- .-' .-- ..-' ~ DUBLIN :S ~ '" <I> GlEAsOJv .'¡:¡ 1) '" BOULEVARD ~~. Þ-.~ ~ ~~ ..;' z ~ ... 1-580 PLEASANTON ¡~ s Exhibit 2-Site Location Wallis Ranch ReorganizationlDevelopinentPlan City of Dublin ,-- - ..;\~'"'-............ I MOURA cØ1JÞ.~~' I 'ONITtD STAT£~ I of A).!ER1ÇA UN MOu.ER I I MISSION pEAK I UN HOIoŒS I BRAGG I I sn....1ERIA I I J41ELStN I I i qUAR~"'l LJ.Nt SCllOOL I \ \ KO'aOI» \ I \ \ KO:E!OLD \ \ I \ \. -. SPERFSLAGE \ I \ \ , , ç)'Gl ~ I Exhibit3-Proposed Reorganization Boundary r 1'1'/'_ - Wallis Ranch ReorganizationlDevelopment Plan mACKAY& SOIllPS I City of Dublin ÇI'II.~~__1RIM'fK _u. '151_~"_ ......õIQðJ.- "'1,Iw;H..............~~,o:...._ I I I I I I I I I I I I I I I I I I I FISF FI'IF WrrI'D STATES OF ,w:øIC-Þ. f<AA "0"-'"" sn.VEI<IA f<AA f<AA mELS£N ..... -- ...- '"'" , I I QUAIIRY LANE scHOOl.. M SHEA HO"",,¡ . !4SSII PUBLIN p£VE\.OPWN'r !.LO. -$ ..-. . I". - Exhibit 4~Proposed Stage 1 PD PlanlWallis Ranch Wallis Ranch Reorganizationlpevelopment Plan City of Dublin IIIACICAY... ~ v~iIrIfiNCao:. _1;0 ~_m- 1. Project description 2. Lead agency: 3. Contact person: 4. Project location: 5. Project contact person: 6. General Plan designations: Application for an Amendment to the Eastern Dublin General Plan/Specific Plan to modify existing land uses, Stage 1 PD prezoning, request for reorganization to include annexation to the City of Dublin and DSRSD, and request to enter into a pre-annexation agreement between the City of Dublin and the Wallis Ranch property owner. City of Dublin 100 Civic Plaza Dublin. CA 94583 Michael A. Porto, Dublin Planning Department (925) 833-6610 West of Tassajara Road, south of the Alameda-Contra Costa line and east of Camp Park¡¡ RFf A Martin Inderbitzen Low Density Residential (0.9-6.0 du/ac), Medium Density Residential (6.1-14.0 duJac), Medium High Density Residential (14.1-25.0 duJac), Neighborhood Conunercial (.25-.60 FAR), Elementary School, Neighbor- hood Park, Neighborhood Square, Open Space PD-Single Family Residential, PD-Medium Density Residential, PD-Mediurn High Density Residential, PD- Neighborhood Conunercial, PD-Neighborhood Park ,and PD-Open Space. 8. Other public agency required approvals: 7. Proposed Pre-zoning: City of Dublin Initial StudylWaJlis Ranch Annexation F'A 02-028 · Reorganization to include annexation to City of Dublin and Dublin San Ramon Services District (Alameda County Local Agency Formation Conunission) · General Plan Amendment/Specific Plan Amendment for Wallis ranch(City of Dublin) · Prezoning (City of Dublin) · Pre-Annexation Agreement (City of Dublin) · Vesting tentative and final subdivision maps for Wallis Ranch (City of Dublin) · Site Development Review for Wallis Ranch (City of Dublin) · Grading and building permits, Wallis Ranch (City of Dublin) · Sewer and water connections, Wallis Ranch (DSRSD) · Encroachment permits (City of Dublin) Potential permits and approvals; - Notice of Intent (Water Resources Control Board) Page 11 February 2003 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I City of Dublin Initial StudylWallis Ranch Annexation PA02-028 - 404 Permit (US Army Corps of Engineers) _ Streambed A!teration Agreement (CDFG) _ Permits from San Francisco Bay Region Water Quality Control Board _ Permits from U.S. Fish and Wildlife Service Page , 2 February 2003 Environmental Factors Potentially Affected The environmental factors checked below would be potentially affected by this project, involving at least one impact that is a "potentially significant impact" as indicated by the checklist on the following pages. - Aesthetics X Agricultural X Air Quality Resources X Biological Resources ~ Cultural Resources - Geology/Soils - Hazards and - Hydro10gyIW ater X Land Use/ Planning Hazardous Materials Quality - Mineral Resources - Noise X PopulationIHousing X Public Services X Recreation X Transportation! Circulation X Utilities/Service - Mandatory Findings Systems of Significance Determination (to be completed by Lead Agency): On the basis of this initial evaluation: - I find that the proposed project could not have a significant effect on the environment and the previous Negative Declaration certified for this project by the City of Dublin adequately addresses potential impacts and mitigates impacts to a less-than-significant level. - I find that although the proposed project could have a significant effect on the environment, there will not be a significant effect in this case because the mitigation measures described on an attac:hed sheet have been added to the project A Negative Declaration will be prepared. ----..x... I find that although the proposed project may have a significant effect on the environment, but at least one effect I) has been adequately analyzed in an earlier document pursuant to applicable legal standards, and 2) has been addressed by mitigation measures based on earlier analysis as described on the attached sheets, if the effect is a "potentially significant impact" or "potentially significant unless mitigatec;i." An Environmental Impact Report is required, but must only analyze the effects that remain to be addressed. - I fmd that although the proposed project could have a significant effect on the environment, there will not be a significant effect in this case because all potentially significant effects (a) have been analyzed adequately in an earlier EIR pursuant to applicable standards, and (b) have been avoided or mitigated pursuant to that earlier EIR, including revisions or mitigation measures that are imposed on the proposed project. Signature: ~ - Printed Name: (ï e-c-,' G..a......... Date: '2./J?,/~ f For: (.L.......I 1) -\;-\..:.. \ ) City of Dublin Initial StudylWallis Ranch Annexation PA 02,028 Page'3 February 2003 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I Evaluation of Environmental Impacts 1) A brief explanation is required for all answers except "no impact" answers that are adequately supported by the information sources a lead agency cites in the parenthesis following each question. A "no impact" answer is adequately supported if the referenced information sources show that the impact simply does not apply to projects like the one involved (e.g. the project falls outside a fault ruprore zone). A "no impact" answer should be explained where it is based on project-specific factors as well as general factors (e.g. the project will not expose sensitive receptors to pollutants, based on a project-specific screening analysis). 2) All answers must take account of the whole action, including off-site as well as on-site, cwnulative as well as project-level, indirect as well as direct, and construction as well as operational impacts. 3) "Potentially Significant hnpact" is appropriate if there is substantial evidence that an effect is significant. If there are one or more "potentially significant impact" entries when the deten:nínation is made, an EIR is required. 4) "Negative Declaration: Potentially Significant Unless Mitigation Incorporated" implies elsewhere the incorporation of mitigation measures has reduced an effect from "potentially significant effect" to a "less than significant impact." The lead agency must describe the mitigation measures and briefly explain how they reduce the effect to a less - than significant level. City 01 Dublin Initial studylWallis Ranch Annexation PA 02-028 Page 14 February 2003 Environmental Impacts (Note: Source of determination listed in parenthesis. See listing of sources used to determine each potential impact at the end of the checklist) Note: A full discussion of each item is found following the checklist I. Aesthetics. Would the project: a) Have a substantial adverse impact on a scenic vista? (Source; 1,2,4) b) Substantially damage scenic resoutces, including but not limited to trees, rock outc:roppings, and historic buildings within a state scenic highway? (Source: 1,2,4) c) Substantially degrade the existing visual . character or quality of the site and its surroundUngs?(Source:2,4) d) Create a new source of substantial light or glare which would adversely affect day or nighttime views in the area? (Source; 4) II. Agricultural Resources Would the projecr: a) Convert Prime Far:mland, Unique Farmland or Farmland of Statewide hnportance, as showing on the maps prepared pursuant to the Farmland Mapping and Monitoring Program of the California Resources Agency, to a non-agricultural use? (Source: 1,2) b) Conflict with existing zoning for agriculture use, or a Williamson Act contract? (Source; 1,2) c) Involve other changes in the existing environment which, due to their location or nature, could result in conversion of farmland to a non-agricultural use? (Source: 1,2) m. Air Quality (Where available, the significance criteria established by the applicable air quality management district may be relied on to make the following . determinations). Would the project: a) Conflict with or obstruct implementation of the applicable air quality plan? (Source: 2) b) Violate any air quality standard or contribute substantially to an existing or projected air quality violation? (Source; 2) City of DUblin Initial StudylWallis Ranch Annexation PA 02-{)28 PotentiaJ]y Less Than Less than No Significant Significant Significant Impact Impact With Impact Mitigation . . X . X X X X X X . X X Page'5 February 2003 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I c) Result in a cumulatively considerable net increase of any criteria pollutant for which the project region is non-anainrnent under an applicable federal or state ambient air quality standard (including releasing emissions which exceed quantitative thresholds for ozone precursors? (2) d) Expose sensitive receptors to substantial pollutantconcencrations? (Source: 2) e) Create objectionable odors? (Source: 2,5) IV. Biological Resources. Would the project a) Have a substantial adverse effect, either directly through habitat modifications, on any species identified as a candidate, sensitive, or special status species in local or regional plans, policies or regulations, or by the California Department of Fish and Game or the U.S. Fish and Wildlife Service? (Source: 2) b) Have a substantia! adverse effect on any riparian habitat or other sensitive natura! community identified in loca! or regiona! plans, policies or regulations or by the Ca!ifomia Department of Fish and Game or the U.S. Fish and Wildlife Service? (Source: 2) c) Have a substantia! adverse impact on federa!ly protected wetlands as defined by Section 404 of the Clean Water At;t (including but not limited to marsh, vernal pool, coastal, etc.) through direct remova!, filling, hydrological interruption or other means? (Source: 2) d) Interfere substantially with the movement of any native resident or migratory fish or wildlife species or with established native resident or migratory wildlife corridors, or impede the use of native wildlife nursery sites? (Source: 2) e) Conflict with any local policies or ordinances protecting biological resources, such as tree protection ordinances? (Source: 2) City of Dublin Initial studylWallis Ranch Annexation PA 02-028 Potentially Less Than Less than No Significant Significant Signillcant Impact Impact With Impact Miti aation X X X X X X X X Page , 6 February 2003 Potentially Less Than Less !ban No Significant Significant Significant Impact Impact With Impact Miti2ation X X X . X X X . X X X X X X X f) Conflict with the provision of an adopted Habitat Conservation Plan, Natural Community Conservation Plan or other approved local, regional or state habitat conservation plan? (Source: 1,2) . V. Cultural Resources. Would the project a) Cause a substantial adverse impact in the significance of a historical resource as defined in Sec. 15064.5? (Source: 2) b) Cause a substantial adverse change in the significance of an archeological resource pursuant to Sec. 15064.5 (Source: 2) c) Directly or indirectly destroy a unique paleontological resource or unique geologic feature? (Source: 2) d) Disturb any human retuains, including those interred outside of a formal cetuetery? (Source: 2) VL Geology and Soils. Would the project a) Expose people or structures to potential substantial adverse effects, including the risk of loss, injury, or death involving: i) Rupture of a known earthquake f311lt, as delineated on the most recent Alquist-Priolo Fault Zoning Map issued by the State Geologist or based on other known evidence of a known fault (Source: 2) ii) Strong seismic ground shaking (2) iii) Seismic-related ground failure, including liquefaction? (2) iv) Landslides? (2) b) Result in substantial soil erosion or the loss of topsoil? (25) c) Be located on a geologic unit or soil that is unstable, or that would become unstable as a result of the project and potentially result in on- andoff·site landslide, lateral spreading, subsidence, liquefaction or similar hazards (Source: 2) d) Be located on expansive soil, as defined in Table 13-1-B of the UnifonnBuilding Code (1994), creating substantial risks to life or property? (Source: 2) City of DUblin In~ial StudyiWallis Ranch Annexation PA 02-028 Page 17 February 2003 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I e) Have soils capable of adequately supporting the use of septic tanks or alternative wastewater disposal systems where sewers are not available for the disposal of waste? (Source: 2, 5) vn. Hazards and Hazardous Materials. Would the project: a) Create a significant hazard to the public or the environment through the routine transport, use or disposal of haZardous materials (Source: 2, 5) b) Create a significant hazard to the public or the environment through reasonably foreseeable upset and accident conditions involving the release of hazardous into the environment? (Source: 2, 5) c) Emit hazardous emissions or handle hazardous materials, substances, or waste within one-quarter mile of an existing or proposed school? (Source: 2, 5) d) Be located on a site which is included on a list of hazardous materials sites complied pursuant to Government Code Sec. 65962.5 and, as a result, would it create a significant hazard to the public or the environment? (Source: 5) e) For a project located within an ajrport land use plan or, where such plan has not been adopted, would the project result in a safety hazard for people residing or working in the project area? (Source: 2) f) For a project within the vicinity of private airstrip, would the project result in a safety hazard for people residing or working in the project area? (Source: 2, 5) g) Impair implementation of or physically interfere with the adopted emergency response plan or emergency evacuation plan? (Source: 2) Potentially Loss Than Los. than No Significant Significant Significant Impact Impact With Impact Miti~ation . X . X X X X X . X . X City Of Dublin _ Initial StudylWallis Ranch Annexation PA02-028 Page 18 February 2003 Potentially Less Than Less than No Significant Significant Significant Impact Impact With Impact Mitigation X X . . X X X X X X Ii) Expose people or structures to a significant risk of loss, injury or death involving wildland fires, including where wildlands are adjacent to urbanized areas or where residences are intermixed with wildlands? (Source: 2) IX. Hydrology and Water Quality. Would the project: a) Violate any water quality standards or waste discharge requirements? (Source: 2) b) Substantially deplete groundwater supplies or interrere substantially with groundwater recharge such that there would be a net deficit in aquifer volume Ot a lowering of the local groundwater table level (e.g. the production rate of existing nearby wells would drop to a level which would not support existing land uses or planned uses for which permits have been granted? (Source: 2) c) Substantially alter the existing drainage pattern of the site or area, including through the aeration of the course of a stream or river, in a manner which would result in substantial erosion or siltation on- or off- site? (Source: 2) d) Substantially alter the existing drainage pattern of the site or areas, including through the alteration of a course or stream or river, or substantially increase the rate or amount of surface runoff in a manner which would result in flooding on- or off-site? (Source: 2) e) Create or contribute runoff water which would exceed the capacity of existing or planned storrnwater drainage systems or provide substantial additional sources of polluted runoff? (Source: 2) 1) Otherwise substantially degrade water quality? (Source: 2) g) Place housing within a lOO-year flood hazard area as mapped on a Flood Hazard Boundary or Flood Insurance Rate Map or other flood delineation map? (Source: 2) City of Dublin InltialStudylWallis Ranch Annexation PA 02-028 Page 19 February 2003 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I h) Place within a lOG-year flood hazard area structl1res which impede or redirect flood flows? (Source: 2) i) Expose people or structures to a significant risk of loss, injury, and death involving flooding, including flooding as a result of the failure of a levee or dam? (2) j) Inundation by seiche, tsunami or mudflow? (2) IX. Land Use and planning. Would the project: a) Physically divide an established community? (Source: 1,2,4) b) Conflict with any applicable land use plan, policy, or regulation of an agency with jurisdiction over the project (including but not limited to the general plan, specific plan, or zoning ordinance) adopted for the purpose of avoiding or mitigating an environmental effect? (Source: 1, 2) c) Conflict with any applicable habitat conservation plan or natural community conservation plan? (1, 2, 4) X. Mineral Resources. Would the project a) Result in the loss of availability of a known mineral resource that would be of value to the region and the residents of the state? (Source: 1, 2) b) Result in the loss of availability of a locally important mineral resource recovery site delineated on a local general Plan, specific plan or other land use plan? (Source: 1,2) XI. Noise. Would rhe proposal result in: a) Exposure of persons to or generation of noise levels in 'excess of standards established in the general plan or noise ordinance, or applicable standards of other agencies? (Source: 2) b) Exposure of persons or to generation of excessive groundbome vibration or groundbome noise levels? (Source: 2) c) A substantial permanent increase in ambient noise levels in the project vicinity above existing levels without the project? (Source: 2) City of Dublin Initial StudylWallis Ranch Annexation P A 02-028 Potentially Less Than Less than No Significant Significant Significant Impact Impact With Impact Mitigation X X X X X X X X I· . X X X Page 20 February 2003 Potentially Less Than Less than No Significant Significant Significant Impact Impact With Impact Mitigation X . X X X X X X X X X X d) A substantial temporary or periodic increase in ambient noise levels in the project vicilÙty above levels without the project? (Sourœ:2) e) For a project located within an airport land use plan or, where such a plan has not been adopted, within two IlÙles of a public aiIport or public use airport, would the project expose people residing or working n the project area to excessive noise levels? (Source: 2) f) For a project within the vicinity of a private airstrip, would the project expose people residing or working in the project area to excessive noise levels? (Source: 2) xn. Population and Housing. Would the project a) Induce substantial population growth in an area, either directly or indirectly (for example, through extension of roads or other infrastructure)? (Source: 1,2) b) Displace substantial numbers of existing housing, necessitating the construction of replacement housing elsewhere? (2,4) c) Displace substantial numbers of people, necessitating the replacement of housing elsewhere? (Source: 4, 5) XIII. Public Service$. Would the proposal: a) Would the project result in substantial adverse physical impacts associated with the provision of new or physically altered governmental facilities, the construction of which could cause significant environmental impacts, in order to maintain acceptable service rations, response times or other perfonnance objectives for any of the public services? (Sources: I, 2) Fire protection Police protection Schools Parks Other public facilities City of DUblin Initial StudylWallis Ranch Annexation PA 02-028 Page 21 February 2003 .. I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I XV. Transportation and Traffic. Would the project: a) Cause an increase in traffic which is substantial in relation to the existing traffic load and capacity of the street system (i.e. result in a substantial increase in either the number of vehicle trips, the volume to capacity ratio on roads or congestion at intersections)? (2) b) Exceed, èither individually or cumulatively, a level of service standard established by the County Congestion Management Agency for designated roads or highways? (2) c) Result in a change in air traffic patterns, including either an increase in traffic levels or a change in location that results in substantial safety risks? (2) d) Substantially increase hazards due to a design feature (e.g. shaq> curves or dangerous intersections) or incompatible uses, such as farm equipment? (2) , e) Result in inadequate emergency access? (2) f) Result in inadequate parking capacity? (2) g) Conflict with adopted policies, plans or programs supporting alternative transportation (such as bus turnouts and bicycle facilities) (l) Potentially Less Than Less than No Significant Significant Significant Impact hnpact With Impact Miti"ation X . X X X . X X X X X XIV. Recreation: a) Would the project increase the use of existing neighborhood or regional facilities such that substantial physical deterioration of the facility would occur or be accelerated (Source: 2) b) Does the project include recreational facilities or require the construction or expansion of recreational facilities which might have an adverse physical effect on the environment? (Source: 2) City 01 Dublin Initial StudylWallis Ranch Annexation PA 02-028 Page 22 February 2003 XVI. Utilities and Service Systems. Would the project a) Exceed wastewater treatment requirements of the applicable Regional Water Quality Control Board? (2) b) Require or result in the construction of new water or wastewater treatment facilities or expansion of existing facilities, the construction of which could cause significant environmental effects? (2, 5) c) Require or result in the construction of new stonn water drainage facilities or expansion of existing facílíties, the construction of which could cause significant environmental effects? (5) d) Have suffjcient water supplies available to serve the project from existing water entitlements and resources, or are new or expanded entitlements needed? (2) e) Result in a determination by the wastewater treatment provider which serves or may serve the project that it has adequate capacity to serve the project's projected demand in addition to the providers existing commitments? (2) t) Be served by a landfill with sufficient permitted capacity to acconunodate the project's solid waste disposal needs? (2) g) Comply with federal, state and local statutes and regulations related to solid waste? (2) XVI. Mandatory Findings of Significance. City of Dublin . Initial studylWallis Ranch Annexation PA 02-028 Potentially Less 'than Less than No Significant Significant Significant lntpact Impact With Impact Mitiocation X X X X X X X Page 23 February 2003 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I a) Does the project have the potential to degrade the quality of the environment, substantially reduce the habitat of a fish or wildlife species, cause a fish or wildlife population to drop below self-susta,ining levels, threaten to eliminate a plant or animal community, reduce the number of or restriCt the range of a rare or endangered plant or animal or eliminate important examples of the major periods of California history or prehistory? b) Does the project have impacts that are individually limited, but cumulatively considerable? ("Cumulatively considerable" means that the incremental effects of a project are considerable when viewed in connection with the effects of past projects, the effects of other current projects and the effects of probable future projects). c) Does the project have environmental effects which will cause substantial adverse effects on human beings, either directly or indirectly? X Potentially Less Than Less than No Significant Significant Significant Impact Impact With Impact MitiMtion X X Source 1. City of Dublin General Plan (Revised July 7, 1998) 2. Final Eastern Dublin Specific Plan, City of Dublin (June 6, 1998) . 3. Certified Environmental Impact Report (State Clearinghouse No. 91103064), Eastern Dublin General Plan Amendment and Specific Plan (including the Draft and Final EIRs, Addenda, EJ . 4. Site Visit 5. Other Source. These documents are available for review at: City of Dublin CommunitY Development Department 100 Civic Plaza Dublin, CA 94568 City of Dublin Inítial StudylWallis Ranch Annexation PA 02-028 Page 24 February 2003 XVII. Earlier Analyses This Initial Study is being prepàred to determine whether an earlier EIR (the EIR prepared for the Eastern Dublin General Plan Amendment and Specific Plan, State Clearinghouse No. 91103064) may be used to evaluate the proposed project pursuant to CEQA Guidelines (Section 15063 (c)(7». a) Earlier analyses used. Identify earlier analyses and state where they are avallable for review. Portions of the environmental setting, project impacts and mitigation measUreS for this Initial Study refer to environmental information contained in the 1992 Eastern Dublin General Plan Amendment and Specific Plan Environmental hnpact Report (State Clearinghouse No. 91103064), hereinafter referred to as the Eastern Dublin EIR. The Eastern Dublin EIR is a Program EIR which was prepared for the Eastern Dublin General Plan Amendment and Specific Plan of which this Project is a part. It was certified by the Dublin City Council on May 10, 1993. As part of the certification the Council adopted a Statement of Overriding Considerations for the following impacts: cumulative traffic, extension of certain community facilities (natural gas, electric and telephone service), regional air quality, noise and visual. The Eastern Dublin EIR contains a large number of mitigation measUres which apply to this Project and which would be applied to any development within the Project area. Specific mitigation measures identified in the certified Eastern Dublin EIR for potential impacts are referenced in the text of this Initial Study. Since certification of the Eastern Dublin EIR, several changes in circumstances in which the Project will take place have occurred and which could effect the impacts and/or mitigations analysis of the Project. Such changes in circumstances include, but are not limited to: 1) additions of species to the California and/or Federal Endangered or Threatened Species Lists; 2) continued development in the Tri-Valley area and beyond with potential changes in commute patterns and traffic intensities, which also may affect air quality and noise within or on the project area; 3) changes in California law regarding annexations (i.e., adoption of AB 2838) which may affect the designation of portions of the project site as prime agricultural soils; and 4) changes in the provision and distribution of some public services (schools) and public utilities (water, wastewater, storm drainage and gas and electricity). Pursuant to CEQA Guidelines Section 15162 and 15163, this Initial Study is intended to Identify the potential for any new or substantially increased significant impacts on or of the Project which were not evaluated in the Eastern Dublin EIR and which would require additional environmental review. City of Dublin Initial studylWallis Ranch Annexation PA 02..{)28 Page 25 February 2003 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I Attaclunent to Initial Study Discussion of Checklist Legend PS: Potentially Significant LS: Less Than Significant; or Less Than Significant due to the previously adopted mitigation measures of the Eastern Dublin EIR NI: No Iropact; or No Additional Iropac:t beyond that which was previously identified in the Eastern Dublin EIR and/or for which a Statement of Overriding Consideration was adopted Page 26 February 2003 City of DUblin Initial Study/Wallis Ranch Annexation PA 02-028 1. Aesthetics Environmental Setting The project site is vacant except for two residences, scattered agricultural buildings and outside storage of vehicles and construction equipment. The Eastern Dublin EIR does not classify the project area as containing visually sensitive resources (Fig. 3.8-H). The City's General Plan also identifies an elevation "cap" above which certain development is prohibited and provides guidelines for sensitive development at certain elevations and slopes-. Tassajara Road, from the I-580 freeway to the Alameda- Contra Costa County line, is designated as a Scenic Route in the County Scenic Route Element of the General Plan, which has also been adopted by the City of Dublin by reference in the Dublin General Plan. Program 6Q of the Eastern Dublin Specific Plan says that the "the City of Dublin should officially adopt Tassajara Road, 1-580 and Fallon Road as designated scenic corridors, adopt a set of scenic corridor policies and establish review procedures and standards for projects within the scenic corridor viewshed." In 1996, the City did adopt the Eastern Dublin Scenic Corridor Policies and Standards document prepared by David Gates & Associates. This document contains more detailed policies that allow future development as envisioned in the Specific Plan while maintaining the visual character of natural features within the area. Such implementing polices are in addition to all other goals and polices contained in the Eastern Dublin Specific Plan. Proiect ImDact~ and Mitigation Measures a) Have a substantial adverse impact on a scenic vista? LS. Approval and construction of the proposed project would alter the character of existing scenic vistas and could obscure important sightlines if not mitigated. This impact was addressed in the Eastern Dublin EIR (Impacts 3.8/A, 3.8/B, 3.8/C, 3.8/D, 3.8Æ, 3.8/G and 3.8/I)) and with implementation of mitigation measures the identified impacts on scenic vistas are less-than-signific(1T¡t. These Mitigation Measures include: 3.8/1.0, 3.812.0, 3.8/3.0, 3.8/4.0-4.5, 3.8/5.0-5.2, 3.8/6.0, 3.8n.O and 3.8n.1 (pages 3.8-4 through 3.8-9 of the Eastern Dublin EIR). These mitigation measures encourage preservation of the natural landscape, preservation of important visual resources and features, minimized grading for development; grading and building to preserve natural contours; prohibition of development along identified ridgelines; and preservation of views of designated open spaces. In addition, Policies 6-29 through 6-38 and text discussion within the Eastern Dublin Specific Plan provide direction for the type of development which may occur in "visually sensitive" areas. These policies are directed towards preserving scenic vistas and view corridors and provide guidelines for grading and building. crty of Dublin Initial StudylWallis Ranch Annexation p A 02-028 Page 27 February 2003 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I b) Substantially damage scenic resources, including Slate scenic highways? LS. Development of the project site will alter the visual experience of travelers on scenic routes in eastem Dublin. Interstate 580 and Tassajara Road have been designated as a scenic corridor by Alameda County. This potential impact (Impact 3.811) was identified and addressed in the Eastern Dublin EIR and implementation of Mitigation Measures 3.8/8.0 and 3.818.1 (page 3.8-9) reduce this impactto a less-than-significant level. These mitigation measures encourage the City to adopt certall roads as scenic corridors (including TaSsajara Road), and encourage the City to require detailed visual analyses with development project applications (Le., Stage 2 PD-Planned Development applications). These mitigation measures apply to the entire project area. Additionally, Policies 6-30 and 6-31 of the Eastern Dublin Specific Plan provide guidance for areas of the project visible from a scenic corridor. c) Substantially degrade existing visual character or the quality of the site? NI. This impact was addressed in the Eastern Dublin EIR (Impact 3.81B-Alteration of Rural/Open Space Visual Character and hnpact 3.8/F-Alteration of Visual Character of Flatlands). Development of the project area would alter the existing rural and open space qualities and alter the existing visual character of valley grasses and agricultural fields. The Eastern Dublin EIR concluded that no mitigation measures could be identified to either fully or partially reduce this impact to a less than significant level. Therefore, the EIR concluded this impact would be a potentially significant unavoidable impact and an irreversible change and, pursuant to CEQA, the City of Dublin adopted a Statement of Overriding Consideration for this impact. The proposed project would not substantially change the scale of development anticipated in the Eastern Dublin EIR for the project area and would not change the level of intensity of impact, therefore. no additional discussion or analysis is necessary. d) Create light or glare? LS. Construction of the proposed project would increase the amount of light and glare due to new street lighting and building security lighting. In some instances the additional lighting could result as perceived negative aesthetic impacts through the "spill over" of unwanted lighting onto adjacent properties, parks and other areas that are not intended. to be lighted. The anticipated light and glare generated by the proposed project would not be unique or sufficiently different from other development projects within the City or the Eastern Dublin planning area. The City of Dublin has adopted regulations which limit the amount of "spill-over" lighting and conditions of approval also are routinely adopted with each project which address potentialligbt and glare impacts. The City's zoning ordinance, adopted site development review guidelines, and conditions of approval become part of the project, if approved and the project would have impacts that are less-than-significant. Because light and glare created by the proposed project would be typical of development elsewhere in the City, and due to standard City regulations, light and glare impacts would be less-than-significant. Page 28 February 2003 City of DUblin Initial Study/Wallis Ranch Annexation _ PA 02-028 2. Agricultural Resources Environmental Setting Historically the project site has been used for grazing, dry-land farming, and other non-intensive agricultural endeavors. The Eastern Dublin EIR characterizes the majority of the area outside of the Tassajara Creek corridor as farmland "oflocal importance" (Figure 3.1-B), which is defined as those farmlands which contribute to the local production of food, feed, fiber; forage and oilseed crops (p. 3.1-2). The Eastern Dublin EIRconsidered the discontinuation of agricultural uses as an insignificant impact due to the high percentage of Williamson Act contracts which were non-renewed and the limited value of the non-prime soils. And, because some of the farmlands within the Project area were not considered "prime" their loss was judged to be insignificant. None of the soils within the project area were identified as Class I or Class II solls in the eastern Dublin EIR. However, since certification of the Eastern Dublin EIR, the evaluation of soils considered as "prime" for annexation purposes has been modified through adoption of criteria established by the Cortese-Knox-Hertzberg Local Government Reorganization Act (Government Code Section 56064, referred to as Assembly Bill 2838). Soils which previously would not have been considered as "prime agricultural soils" and land which was not considered significant or important for.agricu1tural purposes may now be considered as such by the new law. Project Jmpact~ and Mitigation Measures a, c) Convert primefarmland to a non-agricultural use or involv~ orher changes which could result in conversion of farmland to a non-agricultural use? PS. Based on the revised Figure 3.6ID contained in the Final EIR for the EDSP, there are no Class I or Class II Prime Agricultural Soils present on the project site. These soils are located in the flatter alluvial plain area just north of the 1-580 freeway. However, since adoption of AB 2838, criteria for agricultural suitability related to annexations has changed and the effect of conversion of the property to non-agricultural, planned urban uses may be a potentially significant environmental impact. This topic will be evaluated in the Supplemental EIR. b) Conflicr with existing zoning for agricultural use, or a Williamson Act contract? N1 Although the Lin property was identified as having a Williamson Act Land Conservation Agreement in place at the time of adoption of the Eastern Dublin Specific Plan, the Agreement has since been non-renewed and none of the properties proposed for reorganization ate encumbered with a Williamson Act Land Preservation Agreement No impacts will therefore result. City of Dublin Initial StudylWallis Ranch Annexation PA 02·028 Page 29 February 2003 I I I I I I I a I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 3. Air Quality Environmental Settinl! Dublin is located in the Tri-Val1ey Air Basin. Within the Basin, state and federal standards for nitrogen dioxide, sulfur dioxide and lead are met. Standards for other airbome pollutants, including ozone, carbon monoxide and suspended particulate roatter (PM-I0) are not roet in at least a portion of the Basin. Project Imuacts and Mitigation Measures a) Would the project conflict or obstruct implementation of an air quality plan? PS. Although the project itself may not contribute any more pollutants than originally anticipated by the Eastem Dublin EIR; as a result of roore rapid urbanization iü the Tri- Valley area than originally expected, an increase in traffic through the Tri- Valley from other areas, and changing commute patterns, the environment in which the project would occur may have changed enough such that the project could contribute to emissions exceeding Bay Area Air Quality Management District (BAAQMD) significance thresholds. This may be a potentially significant impact. b) Would the project violate any air quality standards? PS. For the reasons noted above (Le., changed environroental setting of the project), the project could contribute to emissions exceeding BAAQMD significance thresholds. 'This may be a potentially significant impact. c) Would thE project result in cumulatively considerable air pollutants? PS. For the reasons noted in a) above (i.e., the changed environmental setting of the project), the project could contribute to emissions exceeding BAAQMD significance thresholds. This may be a potentially significant impact. d, e) Expose sensitive receprors to significant pollutant concentrations or create objectionable odors? NI. Development of the project area with urban uses will create emissions from a variety of miscellaneous stationary (non-vehicular) sources such as evaporative emissions from paints and cleaning products, etc. The Eastem Dublin EIR noted that although such emissions would be extremely small for any individual resident, they could be substantial when summed over the entire scope of the project (Eastem Dublin EIR, p, 3.11-6). The Eastern Dublin EIR identified this impact as a potentially significant cumulative iJJlpact which could not be mitigated to achieve the eight-fold reduction in stationary source emissions needed to meet the insignificant threshold and, pursuant to CEQA, the City of Dublin adopted a Statement of Overriding Consideration for this impact. The proposed project would not change the scale of development anticipated in the Eastern Dublin EIR for the project area and would not change the level of intensity of impact, therefore, no additional discussion or analysis is necessary. City of DUblin Initial Study/Wallis Ranch Annexation PA 02-028 Page 30 February 2003 4. Biological Resources EnvironmentaJ Settin¡¡: Figure 3.7-A of the Eastern Dublin EIR indicates that the project area is dominated by dry_ farming rotational cropland and non-native grasslands. however, more recent infonnation supplied by the owner of the Wallis Ranch indicates that this parcel has not been fanned for at least five years, although cattle is grazed on at least a portion of the property. Proiect Impacts and Mitigation Measures a) Have a substantial adverse impact on a candidate, sensitive, or special-status species? PS. The Eastern Dublin EIR identified twelve special status plant species, seventeen special status amphibian, reptile, bird and mammal species, and ten special status invertebrate species which could potentially occur within the entire Eastern Dublin planning area (fables 3.7-1 and 3.7-2, pp. 3-7.19-21), based upon the U.S. Fish and WIldlife Service and the California Fish and Game Commission listings at that time. Since certification of the Eastern Dublin EIR, the regulatory status of some of these species may have changed. The Eastern Dublin Specific Plan includes policies to protect special status species (Policies 6-17 and 6-20). Although the proposed project would adhere to the adopted mitigation measures and Specific Plan policies, changes in regulatory circumstances may create a potentially significant environmental impact if not re-addressed. b, c) Have a substantial adverse impact On riparian habitat or federally protected wetlands? PS. Figure 3.7-B of the Eastern Dublin EIR identifies areas within the project area which potentially contain riparian habitat and springs based upon the location of intermittent streams, seeps, etc. Utilizing Figure 3.7-B, it is estimated that approximately 8,700 linear feet of potential riparian habitat could exist within the Project area. Although the EIR identifies mitigation measures and the Eastern Dublin Specific Plan contains polÍcies to address stream conidorsand riparian and wetland areas (policies 6-9 through 6-13 and 6-15), regulatory standards for such riparian habitats may have changed since certification of the EIR. Although the proposed Project would adhere to the adopted mitigation measures and Specific Plan policies, due to a change in regulatory circumstances, the proposed project could have a porentially significant environmental impact. d) Interfere with movement of native fish or wildlife species? PS. As noted above, the Eastern Dublin EJR identified a number of special status wildlife species. Although mitigation measures in the Eastern Dublin EIR and policies within the Eastern Dublin Specific Plan (Policies 6-18 through 6-20) address potential impacts to the movement of wildlife species, and this project would be required to adhere to those mitigation measures and policies, the project may still have a potentially significant impact due to changed regulatory standards regarding the movement of wildlife. City of DUblin Initial StudylWallis Ranch Annexation PA 02-028 Page 31 February 2003 I I I I I I I ., I 'I I I I I I I I I I I I I I I I I I I I I I I I I I I I I e) Conflict with any local policies or ordinances protecting biological resources, such as tree protection ordinances: LS. Mitigation Measures contained in the Eastern Dublin Specific Plan EIR (Mitigation Measure 3.8/3.0) will ensure that significant local trees are protected. Less"than-significant impacts are therefore anticipated. f) Conflict with local policies or ordinances protecting biological resources or any adopred Habitat Conservation Plans or Natural Commtmity Conservation Plans? NI. There are no Habitat Conservation Plan areas or Natural Community Conservation Plans located on the project site. No impacts would therefore result 5. Cultural Resources Environmental Setting Chapter 3.9 of the Eastern Dublin EIR addresses the potential impacts on cultural resources- which may be located within the project area. A field inspection of the entire Eastern Dublin area was performed in 1988. Three potential pre-historic sites (two of them isolated locales) and two historic sites were identified within the proposed Project area (see pp. 3.9-4 - 3.9-6 of the Eastern Dublin Em). Maps of these sites were not included in the EIR to protect them from possible vandalism. The Eastern Dublin Em mandated additional project-level archeological surveys. Project Impacts and Mitigation Measures a) Cause substantial adverse change to significant historic resources? LS. Only two historic sites (a school and dairy complex) were identified in the Project area in the Eastern Dublin EIR. A site-specific Historic Evaluation Report was completed on the dairy complex by William Self Associates in May 2001. Copies of this report are available at the Dublin Co=unity Development Department. The report notes that the complex consists of an older dairy complex consisting of 7 buildings, including 2 barns, 2 work sheds and 2 houses dating to approximately 1910. The Self report concludes that the building complex does not appear to be eligible for the California Register of Historic Places, since the buildings do not appear be associated with local agricultural history. Similarly, the buildings do not appear to have maintained their original integrity and do not appear to be distinguished examples of the historic period in which they were constrocted, In addition, the complex was not owned or occupied by residents of local or regional significance. Due to the expected level of development within the Project area, the Eastern Dublin EIR assumed that all historic sites would be disturbed or altered in some manner, even those located in areas designated for Open Space. This potential impact was identified and addressed in the Eastern Dublin Em Impact 3.9/C) and mitigation measures 3.9n.0 through 3.9/12.0 (page 3.9-8) will reduce this impact to a less-than-significant level. These mitigation measures require City of Dublin Initial StudylWallis Ranch Annexation PA02-028 Page 32 February 2003 detailed archival research for each strucmre to assess the structure's significance; encourage adaptive re-use where feasible; and encourage the City to develop a preservation program for historic sites which qualify under CEQA guidelines. Additionally, mitigation measures 3.9/5.0 and 3.9/6.0 (page 3_9-7) also would apply to the project. These mitigations require cessation of all construction activities upon discovery of any previously unidentified historic sites. Additionally, Policies 6-26 and 6-27 of the Eastern Dublin Specific Plan require in-depth archival research to determine the significance of any resource prior to alteration and encourage the adaptive re-use or restoration of historic structure_s whenever feasible. As noted in the Project Description section of this Initial Study, an older one-room schoolhouse has been located on the northerly portion of the Lin property site. The project developers of this property have weatherproofed the structure and have offered the building to the City of Dublin. There are no impacts beyond those analyzed in the Eastern Dublin EIR and therefore no additional review or analysis is necessary. b, c) Cause a substantial adverse impact or destruction to archeological or paleontological resources? LS. There is a remote but potentially significant possibility that construction activities, including site grading, trenching and excavation, may uncover significant archeological and/or paleontological resources on the site. The Eastern Dublin EIR categorized these resources as pre- historic_cultural resources. Three potential pre-historic sites were identified by the EIR within the proposed project area. The Eastern Dublin EIR assumed that all pre-historic sites would be disturbed or altered in some manner. This potential impact was identified and addressed in the Eastern Dublin EIR (Impact 3.9/A) and implementation of mitigation measures 3.9/1.0 through 3.9/4.0 (page 3.9-6 ~ 3.9-7) reduce this impact to a œss-than-significant leveL These mitigation measures require subsurface testing for archeological resources; recordation and mapping of such resources; and development of a protection program for resources which qualify as "significant" under Appendix K ofCEQA. Mitigation measures 3.9/5.0 and 3.9/6.0, described above, also were adopted to address the potential disruption of any previously unidentified pre- historic resources and these mitigation measures reduce the potential impact to a less-than- significant leveL The Eastern Dublin Specific Plan also contaius policies (policies 6-24 and 6-25) requiring tesearch of archaeological resources prior to construction and detennination of the significance and extent of any resources uncovered during grading and construction. d) Disturb any human resources? LS. A remote possibility exists that historic or pre-historic human resources could be uncovered on the site during construction activities. Implicit in the mitigation measures of the Eastern Dublin EIR and Eastern Dublin Specific Plan policies is the potential for discovery of human resources near or within the identified pre-historic and historic sites. With implementation of the above-mentioned mitigation measures adopted with certification of the Eastern Dublin EIR (mitigation measures 3.9/1.0 -12) and adherence to the Eastern Dublin Specific Plan policies relating to cultural resources (policies 6-24. and 6-25), this impact is less-Than-significant. City 01 Dublin Initial StudylWallis Ranch Annexation PA 02-028 Page 33 February 2003 I 'I I I I I I I I I I I I I I I I I I I I I I I I I I I I , I I I I I I ,I I There are no impacts beyond those analyzed in the Eastem Dublin EIR and therefore no additional review or analysis is necessary. 6. Geology and Soils Environmental Settin!2: This section of the Initial Study addresses seismic safety issues, topography and landforms, drainage and erosion and the potential impacts of localized soil types. Seismic The project area is a part of the San Francisco Bay area, one. of the most seismically active regions in the nation. The Eastern Dublin EIR notes the presence of several nearby significant faults, including the Calaveras Fault, Greenville Fault, Hayward Fault and San Andreas Fault (pp. 3.6-1 - 3.6-2 and Figures 3.6~A and 3.6-B). The likelihood of a major seismic event on one or more of these faµlts within the near future is believed to be high. However, no active faults are known to traverse the Project site and the site is not identified as located within an Earthquake Safety Zone (formerly Alquist-Priolo Special Studies Zone) as determined by the California Division of Mines and Geology. A second thrust fault system has been inferred in the Coast Ranges of the Bay Area that may be seismically active. A belt of faults and folds has been mapped in sedimentary rocks south of Mount Diablo, including one identified as the "leading edge-blind- thrust, Mount Diablo Domain." Further investigation of this inferred fault has concluded that the risk of ground rupture from this inferred fault is low within the Project area. Site Geology and Soils Site soils, based on a recent site-specific geological study performed by Berlogar Geotechnical Consultants (July 2002), identified a mix of colluvial and alluvial deposits in the project area, which have been determined to be highly expansive. Three landslides have also been mapped on the Lin property. Overall, the Berlogar report notes that the Lin property is suitable for the type aud intensity of development proposed as part of the Stage 1 PD-Planned Development application. Landforms and Topography The project area is part of a broad north-south trending plain known as the Livermore-Amador Valley. Elevations of the subject site range from approximately 405 feet to 705 feet above sea level. Much of the property is gently rolling to alInost flat but the extreme northern and northeastern portions are steeply sloping terrain. Drainage Existing drainage patterns on the site includes a series of small, unnamed intermittent streams. These streams are shown in Figures 3.7~A and-B in the Eastern Dublin EIR. These intermittent City of DUblin Initial Study/Wallis Ranch Annexation PA 02-{)28 Page 34 Febr1.lary 2003 streams generally follow a north-to-south direction, consistent with the overall topography of the Eastern Dublin area. These streams are not delineated drainages and do not tenninate in other local creeks (Tassajara Creek). Proiect Impacts and Mitigation Measures a) Expose people or strucmres to potential substamial adverse impact$, including loss, injury or death related to ground rupture, seismic ground shaking, ground failure or landslides? LR Similar to many areas of California, the site could be subject to ground shaking caused by the regional faults identified above. Under moderate to severe seismic events which are probable in the Bay Area over the next 30 years, buildings, utilities and other improvements constructed in the project area would be subject to damage caused by ground shaking. However, since the project area is not located within an Earthquake Fan1t Zone (formerly Alquist-Priolo Zone), the potential for ground rupture is anticipated to be minimal. The Eastern Dublin EIR identified that the primary anc;! secondary effects of ground-shaking (Impacts 3.6/B and 3.6/C) could be potentially significant impacts. With implementation of mitigation measure 3.6/1.0 the primary effects of ground-shaking (Impact 3.6/B - damage to structures and infrastructure, potential loss of life) are reduced to a less-than-significant level by using modem seismic design for resistance to lateral forces in construction, which would reduce the potential for structure failure, major structural damage and loss of life. Mitigation measures 3.6/2.0 through 3.6/8.0 will be implemented to reduce the secondary effects of ground-shaking (Irnpact3 .6IC ~ seismically induced landslides, differentiai compaction/settlement, etc.), to a less-than-significant level. These mitigation measures require: stabilization of unstable landforms where possible or restriction of improvements from unstable landforms; appropriate grading in hillside areas; utilization of properly engineered retention structures and fill; design of roads and infrastructure to accommodate potential settlement; and completion of design-level geotechnical investigations (pp. 3.6-8 through 3.6-9). Adherence to Mitigation Measures MM 3.6/1.0 through 8.0 will ensure that new structures and infrastructure built within the project area will comply with generally recognized seismic safety standards so that effects due to ground shaking will be less-than-significant. The majority of the project area contains gently to steeply sloping hillsides. The northern and northeastern portions have a history of landslides. As part of the development of the area the site is proposed to be graded and re-contoured to accommodate building pads, roads, infrastructure, parks, schools, parking areas and other development features. The Eastern Dublin EIR notes that development of the project site could result in permanent changes in existing landforms, particularly if substantial grading occurs. Two existing mitigation measures reduce this impact to less-than-slgnificant. Mitigation Measure 3.619.0 states that grading plans which adapt improvements to natural landforms, use retaining structures and steeper cut and fill slopes where appropriate, and constlUCtion ofroads on ridges reduce impacts to landforms. Mitigation Measure 3.6/10.0 states that specific project lot and infrastructure alignment should be based on the identification of City of Dublin Initial StudyNVallls Ranch Annexation PA 02·028 Page 35 February 2003 I I I I I I I I I I , , I I I I I I I I , I I I I I I I I I I I I I I I I I geotechnically feasible building areas, clustering structures, and avoiding adverse conditions by utilizing lower density development in the hillside areas. The Eastern Dublin Specific Plan also contains policies aimed at reducing impacts related to landform changes and reducing potential impacts related to landslides. Policies 6-40 through 6- 42 restrict structures on slopes of 10-30% and generally preclude structures on slopes of greater than 30%. There are no impacts beyond those analyzed in the Eastern Dublin EIR and therefore no additional review or analysis is necessary. The applicant for development of the Un property have commissioned a soils and geotechnical report to conform with adopted mitigation measures contained in the EastemDublin EIR and polices set forth in the EDSP. b) Is the site subject to substantial erosion and/or the loss of topsoil? LS. The Eastern Dublin EIR notes that development of the project site would modify the existing ground surface and alter patterns of surface runoff and infiltration and could result in a short- term increase in erosion and sedimentation caused by grading activities (Impact 3.6/K). Long- term impacts could result from modification of the ground-surface and removal of existing vegetation (Impact 3.6/L). With implementation of Mitigation Measures 3.6/27.0 and 28.0 (pp. 3.6-14 - 3.6-15) both of these impacts would be less-than-significant. These mitigation measures specify and require the preparation and implementation of erosion control measures to be utilized on a short-term and long-term basis_ In addition to these measures, the project would be subject to erosion control and water quality control measures implemented by the state Regional Water Quality Control Board. The Eastern Dublin Specific Plan also contains a policy (policy 6-43), whIch requires that new development be designed to provide effective control of soil erosion as a result of constroction activities. c, d) Is the site located on soil thar is Imstable or expansive or will result in potential lateral spreading. liquefaction, landslide or collapse? LS. Portions of the project area are underlain by soil types with high shrink-swell potential which have the potential to cause damage to foundations, slabs, and pavement (Impact 3.6/H). -With adherence to Mitigation Measures 3.6/14.0 through 16.0 (pp. 3.6-11-12) and by requiring appropriate structural foundations and other techniques to overcome shrink -swell effects, potential shrink -swell impacts will be lesscthan-significant. The Eastern Dublin EIR also notes that impacts of slope instability are considered to be potentially significant (Impacts 3.611 and 3.6/1), but can be reduced to a less-than-significant level with implementation of Mitigation Measures 3.6117.0--26.0 (pp. 3.6-12-3.6-14). These mitigation measures require the preparation of site-specific soils and geotechnical studies " " minimizing grading on steep slopes and the formulation of appropriate design criteria; removal/reconstruction of unstable rnaterials;construction of surface and subsurface drainage improvements; reduction of cut-and-fill; maintaining 3:1 cut slopes unless retained; maintaining minimum 2: 1 fill slopes unless properly benched, keyed or treated with a geo-grid; utilizing City of Dublin Initial StudyiWallis Ranch Annexation PA 02-028 Page 36 February 2003 engineered fill; and adherence to the Uniform Building Code and other City requirements for grading. There are no impacts beyond those analyzed in the Eastern Dublin EIR and therefore no additional review or analysis is necessary. e) Have soils incapable of supporring on-site septic ranks if sewers are net available? NI. All new development within the project area would be connected to a public sanitary sewer system installed by future project developer(s) and maintained by the Dublin San Ramon Services District which serves all of the City of Dublin. No new septic systems are proposed within the project area. Therefore, no impact is anticipated with regard to septic tanks. 7. Hazards and Hazardous Materials Environmental Setting The site is primarily open grasslands and currently contains nine single farnily residences and some agricultural out-buildings. Historically, the project site has been used for agriculture, primarily as grazing land and limited dry-farming of crops. Much of the project area currently is utilized for grazing. Some pesticide and herbicide use may be associated with these agricultural uses and some petroleum-based products probably have been used to run and maintain fann equipment. Similar types of petroleum-based products may be in use at a limited trucking and truck storage use located on om; of the parcels. A Phase I Environmental Site Assessment has been performed for the Lin property within the project area and typical levels of herbicides, pesticides and limited amounts of petroleum-based products have been identified in localized areas around outbuildings. Based upon the results of the Phase I Environmental Site Assessment performed for the Un property, a Phase IT Environmental Site Assessment may be required to further identify any potential hazardous materials. Policy 11-1 of the Eastern Dublin Specific Plan requires that prior to the issuance of building permits for sites in the project area, such environmental site assessments are required. If applicable, remediation measures would be recommended and required prior to development in accordance with State law. Proiect lrQpacts and Mitil!'ation Measures a, b) Create a significant hazard through trall$port of hazardous materials or release or emission of hazardcus materials? LS. Proposed uses of the projeCt area would include residential, neighborhood commercial, open space and parks. Only minor less-than-significant quantities of potentially hazardous materials such as lawn chemicals, household solvents, etc., would be associated with the majority of the proposed uses. With the expected minimal use of hazardous materials and the requirement for adhering to a hazardous materials business plan, this impact is less-than-significant. City of Dublin Initial studylWallis Ranch Annexation P A 02-028 Page 37 February 2003 I- t I I I I I I I I I t I I , I I I I I I I I I I I I I I I I I I I I I I I c) Is the site listed as a hazardous materiais site? LS. None of the parcels comprising the project area have been listed as a hazardous materials site. As noted above, Phase I Environmental Site Assessments have been completed for the largest property within the project area, the Lin parcel. Levels of petroleum-based products typical of agricultural uses have been discovered near existing agricultural outbuildings but these levels are less"than-significant. Should the project be approved, Phase IT Environmental Site Assessment will be performed to construction. Remediation measures, if needed, would be recommended and completed in accordance with State and Federal requirements. This impact is considered to be less-than-signijlcant. d) Is the site locaied within an airport land use plan of a public airport or private airstrip ? LS. The project area is located outside of the referral area for Livermore Airport, based on Figure 3.11D of the Eastern Dublin EIR. This is considered a less-than-significaTIt impact. e) Represent a safety hazard to persons if located within two miles of a private airstrip? LS. The project is not located within two miles of a private airstrip. Although portions of the project area are subject to noise from helicopters operating at Camp Parks and over surrounding properties near the camp. Adherence to Mitigation Measures identified in the Noise section of this Initial Study will reduce impacts to a less-than-signifiCaTIt level. f) Interference with an emergency evacuation plan? LS. The proposed project would be developed in phases, as is feasible with the extension of services and utilities to the area. Adequate emergency access to all portions of the project area under construction would be required to be provided per the City of Dublin's ordinances and policies. Emergency access requires that structures and occupants of structures can be accessed by emergency vehicles and personnel and also requires that residents are able to evacuate an area in case of some form of hazard or threat of hazard. Adequate water service for fIre-fighting and installation of hydrants or other approved alternative water supply systems would be required per City policy as the project develops. These measures will ensure that impacts related to emergency evacuation plans would be less-than-significant. The Eastern Dublin EIR indicated a mitigation measure (3.4/9.0) to address access, water pressure, fire safety and prevention to reduce this potential impact to a less-than-signijicant level. This mitigation measure requires that certain design standards are incorporated into Project approvals such as: available capacity of 1,000 GPM at 20 PSI fire flow from project fire hydrants on public mains; installation of a buffer zone along the backs of homes contiguous with wildland open space areas; and compliance with minimum road widths, maximum street slopes, parking requirements, and secondary access road requirements. Policy 8-6 of the Eastern Dublin Specific Plan also requires provision of emergency vehicle access from subdivisions to open space areas among other fire prevention methods to address concerns with emergency access and evacuation. g) Expose people and structures to a signijicant risk of loss, injury or death City of Dublin Initial StudylWallis Ranch Annexation PA 02-028 Page 38 February 2003 Specific Plan also contains policies and programs (Policies 9-7 through 9-9 and Programs 9T through 9X, pp. 133-134) which reduce these impact to a less-thall-significant level. Please refer to item "a" above for a discussion of these mitigation measures and policies. With implementation of other mitigation measures enacted to reduce erosion due to grading activities (Mitigation Measures 3.6127.0 and 28.0), these impacts would be less-than-significant. Please refer to the previous section entitled Geology and Soils for a discussion of these mitigation measures. There are no impacts beyond those analyzed in the Eastern DublinEIR and therefore no additional review or analysis is necessary. d) Substantially alter existing drainage patterns or result in flooding, either on or off the project site? LS. Approval of the proposed project and construction of new housing units, other land uses and infrastructure elements envisioned in the proposed project would change drainage patterns within the project area. This impact was identified in the Eastern Dublin EIR (hnpact 3.5Y) and with implementation of Mitigation Measures 3.5/44.0 - 3.5/48.0 it is less-than-significant. These mitigation measures require drainage facilities to minimize flooding; channel improvements consisting of natural creek bottoms and side slopes with natural vegetation where possible; a Master Drainage Plan for each development prior to development approval; facilities to alleviate potential downstream flooding due to project development; and the construction of backbone storm drainage facilities. There are no impacts beyond those analyzed in the Eastern Dublin EIR and therefore no additional review or analysis is necessary. e) Create stormwater runoff that would exceed tlu! capacity of drainage systems or add substantial amc/mts of polluted runciff? LS. Approval of the proposed reorganization and development of the project area and post- construction activities unrelated to project construction could lead to greater quantities of stormwater runoff and could include pollutants in the runoff. These potential impacts were identified in the Eastern Dublin EIR (Impacts 3.5/Y and 3.5/AA). With implementation of mitigation measures 3.5/44.0-49.0 and 3.5/51.0 of the Eastern Dublin EIR this impact is less- than-significant. Policies of the Eastern Dublin Specific Plan (policies 9-7 through 9-9 and Programs 9T through 9X, pp. 133-134) also would be implemented and, as such, these irnpacts would be less-than-significant. Please refer to item "a" above for a discussion of these mitigation measures and policies. There are no impacts beyond those analyzed in the Eastern Dublin EIR and therefore no additional review or analysis is necessary. City of Dublin Initial StudylWallis Ranch Annexation PA 02-028 Page 41 February 2003 I I I I I I I I , I I I- I I I I I I I I I I I I I I I I I I I I I I I I I I f) Substantially degrade water quality? LS. Construction activities related to development of the project area and post-construction activities could degrade water quality through improper construction practices and poor control of storm wat",r runoff resulting in additional sedimentation and potential pollutants in on-site 0, down-stream waters. These impacts were identified in the Eastern Dublin Em (Impacts 3.5fY and 3.5/AA). With mitigation measures 3.5/44.0-49.0 and 51.0 adopted in the Eastern Dublin Em this impact is less-than-significant. Policies of the Eastern Dublin Specific Plan (Policies 9-7 through 9-9 and Programs 9T through 9X ,pp. 133-134) also would be implemented and, as such, these impacts would be less-than-significant. Please refer to item "a" above for a discussion of these mitigation measures and policies. There are no impacts beyond those analyzed in the Eastern Dublin Em and therefore no additional review or analysis is necessary. g, i) Place housing within a 1 DO-year flood hazard area as mapped by a Picod Insurance Rate Map or expose people or structures to a significant risk due to flooding or failure of a levee or dam? NL Portions of the project area that are designated within the 100-year flood plain area are located within and adjacent to Tassajara Creek. TIùs area has been reserved for future open space.as required by the U.S. Fish and Wildlife Service. There would be no impact in regard to flooding hazards. h) Place within a lOO-year flood hazard area structures which would impede or redirect flood flow? NI. As noted in the response to "g" above, none of the developable portions of the project area is located within a 100 year flood hazard area as defined by FEMA. Development of the project site is not expected to impede or redirect flood flows and no impact is anticipated. j) Result in inundation by seiche, tsunami or mudflows? LS. The site is not located near a major body of water that could result in a seiche or tsunami. The risk of potential mudflow is considered low. With mitigation measures adopted in the Eastern Dublin Em (measures 3.6117.0-28.0, pp. 3.6-12 3.6-15), potential impacts of natural and engineered slope stability, and erosion and sedimentation impacts which could create mudflows would be less-rhan significant. These mitigation measures require the preparation of site-specific soils and geotechnical studies minimizing grading on steep slopes and the formulation of appropriate design criteria; removal/reconstruction of unstable materials; construction of surface and subsurface drainage improvements; reduction of cut-and-fil1; maintaining 3: 1 cut slopes unless retained; maintaining minimum 2: 1 fill slopes unless properly benched, keyed or treated with a geo-grid; utilizing engineered fill; and adherence to the Uniform Building Code and other City requirements for grading. There are no impacts beyond those analyzed in the Eastern Dublin Em and therefore no additional review or analysis is necessary. City of Dublin Initial study/Wallis Ranch Annexation PA 02-028 Page 42 February 2003 9. Land Use and Planning Environmental Sening The Project area abuts the eastern city limit boundary of the City of Dublin and the entire project area is located within the City of Dublin's General Plan Planning Area and Sphere of Influence. The project site consists of three different parcels. The proposed land use designations of the project generally reflect the General Plan and Specific Plan land use designations for the project area, with a number of changes as noted in the Project Description section of this Initial Study. Proiect Imnacts and Mitigation Measures a) PhysicaUy divide an established commwlity? NI. Parcels which comprise the project site are contiguous and are not separated by freeways, or arterial roadways. One natural barrier, Tassajara Creek, flows across the eastern portion of the Lin Property, however, this Creek and underlying property ownership is acknowledged in the Eastern Dublin Specific Plan and General Plan. The project area is adjacent to the City of Dublin's eastern boundary and north of current urban development area. Development within the project area with the urban uses designated in the City's General Plan and Eastern Dublin Specific Plan would be a continuation of Dublin as a community. Development of the project site would not divide any established communities or neighborhoods and hence, there would be no impact. b) Conflict with any applicable land use plan. policy or regulation? PS. The project Stage 1 PD-Planned Development Rezoning for the WaIlis Ranch property proposes higher residential densities than identified in the Eastem Dublin Specific Plan. Proposed changes are discussed in the P!'oject Deseription section of this Initial Study. There would therefore be a potentially significant land use impact. c) Conflict with a habitat conservation plan or natural community conservation plan? NI. No habitat conservation plan or natural community conservation plan has been adopted by the City or other agency. There would be 1W impact to a habitat conservation plan or natural community conservation plan, but changed circumstances due to other agencies' potential regulatory action could create an impact. This impact, however, is related to biologic resources and has been identified as a potentially significant impact under the Biologic Resources section of this Initial Study. 10. Mineral Resources Environmental Setting The subject area currently contains no known mineral resources. City of DUblin Initial StudylWallis Ranch Annexation PA 02-028 Page 43 February 2003 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I Project Impacts and MitiUation Measures a, b) Result in the loss of availability of regionally or locally significant mineral resources? NI. There are no known significant mineral resources located within the project area. Annexation and development of the project as proposed would have no impact on mineral resources. 11. Noise Environmental Settinl! Major sources of noise on and adjacent to the project area include noise generated by vehicles on Tassajara Road, aircraft flyovers, mainly from helicopters associated with Camp Parks RFf A and with other activities carried out at Camp Parks, west of the project area. Proiect In¡pacts and Mitie:ation Measures a, d) Would the project expose persorl$ to generation of Mise levels in excess of standards establisMd by the General Plan or other applicable standard or to substantial temporary or periodic increases in ambient noise levels? LS. The Eastern Dublin EIR addresses impacts due to exposure of housing to furore roadway noise (IM 3.1O/A and 3.101B) and includes Mitigation Measures 3.10/1.0 and 3.1012.0 to require furore developers to prepare site-specific acoustical analyses proper to construction and to follow 'recommendations made in each report to reduce interior and exterior noise to aqopted City and state standards. Impacts related to future military operations at Camp Parks have been identified in Impact 3.101D and Mitigation Measure 3.1013.0 will minimize but not reduce this impact to a less-than-significant level. This impact was identified as significant and unmitigatable when the Eastern Dublin EIR was adopted. No further analysis is therefore required. b) Exposure of people to excessive groundbome vibration or groundbome noise levels ? LS. Groundborne vibrations could be caused by vehicular traffic along Tassajara Road and along new streets within future development areas. Since future development is primarily residential in nature, less-than-significant impacts are anticipated. Short-term groundbome vibration impacts cowd also reswt -from construction of bridges spanning Tassajara Creek, however. bridges would be installed early in the development process prior to residential construction c) Substantial permanent increases in ambient Mise levels? NI. Development of the project area with urban uses wiIl introduce noise to the project area. Ambient noise levels would increase permanently due to the proposed change in land use from primarily agriculture to urban uses. The Eastern Dublin EIR identified permanent noise impacts related to vehicular traffic increases (and implicitly urban noises) as an unavoidable andunmitigatable impact and a Statement of Overriding Considerations was adopted by the City Council for this impact; no additional discussion or analysis is necessary. The proposed project City of Dublin Initial StudyIWallis Ranch Annexation PA 02-028 Page 44 February 2003 would not change the scale of development anticipated in the Eastern Dublin EIR for the project area and would not change the level of intensity of impact. e, f) Expose people residing or working within two miles of a public airport or in the vicinity of a private airstrip to excessive noise levels? NL There is no private airstrip in the vicinity of the proposed project, therefore, no impact would result. The project area is located near Camp Parks RFr A and new residents and workers within the project area could be exposed to aircraft noise from military helicopters associated with military operations at Camp Parks. The Eastern Dublin EIR determined that military aircraft noise was a significant and unmitigatable impact and no further analysis is required. 12. Population and Housing EnvironmentaJ Setting- Data from Projections 2000, published by the Association of Bay Area Governments (ABAG), expects the nine-county San Francisco Bay Region to add approximately 1,096,300 new residents by the year 2020. This represents an increase of about 16 percent over the 20-year forecast period from 2000 - 2020. ABAG expects approximately 401, 750 new households in the region by year 2020. ABAG estimates that Dublin's population (indudingits Sphere of Influence) was 31,500 in the year 2000 and is projected to grow to 66,600 by 2020, and increase of 111 %: ABAG estimates that the increase in: new households will create a demand for at least 20,000 new dwellings each year. The City of Dublin is expected to provide 21,290 dwellings by the year 2020. The Eastern Dublin EIR anticipated that the Eastern Dublin area would create 12,458 new dwelling units (Table 3.2-5, page 3.2-7), generating a new resident population of 27,794. Proiect ImDacts and Miti!ration Measures a) Induce substantial populalion growth in an area, either directly or indirectly? PS. Development of the project area according to the City's General Plan and as expected by the Eastern Dublin Specific Plan would increase population in the project area beyond that anticipated or planned-for according to the City's General Plan or as anticipated or evaluated by the Eastern Dublin EIR. The City's General Plan contains Guiding and Implementing policies (6.3.A, 2.1.2.C, 2.1.3.A, 2.1.4.A, 6.4B, and 6.4E) to provide a range of housing types. The Eastern Dublin Specific Plan contains policies to provide a diversity of housing opportunities that meets the social, economic and physical needs of future residents (policies 4-2 through 4-6). b, c ) Would the project displace substantial numbers of existing housing units or people? NI. The project area contains a small number of existing residences and various agricultural out- buildings and land uses. Current residents and uses' could remain in place until such time as development of those particular parcels occurs over time. Due to the limited number of current City of Dublin Initial StudyM'allis Ranch Annexation PA 02-028 Page 45 February 2003 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I residents, the proposed project would not displace substantial numbers of existing housing units or people and no impact is expected. 13. Public Services Environmental Setting Water and Sewer. The project area currently is located within the jurisdiction of Alameda County. The County has limited abilities to provide water or wastewater services to the project area: current residents and land uses rely upon pòvate wells and septic systems for these services. The City of Dublin and the Dublin San Ramon Services District (DSRSD) have worked jointly to ensure that areas annexed to the City also are annexed to DSRSD. The Eastern Dublin Em and the Eastern Dublin Specific Plan and General Plan anticipated that the project area would be serviced by DSRSD. Additionally, DSRSD's master utilities plans for water, wastewater and recycled water include the project area. The project area must be annexed into the DSRSD service area. Such a request has been filed by the largest property owner within the . project area. Fire Protection. Fire protection services for the project area are provided by the Alameda County Fire Department (ACFD). Since the City of Dublin contracts with ACFD for services, upon annexation to the City, the ACFD would continue service to the project area. Police Protection. The Alameda County Sheriff's Office and the California Highway Patrol (ClIP) currently provide police services to the project area. Upon annexation, Dublin Police Services would provide services to the area including enforcement of traffic laws which the CHP currently provides and enforcement of city ordinances and state law. Dublin Police Services is under contract with the Alameda County Sheriff's office: the City of Dublin owns the department's facilities and equipment but the personnel are employed by the Sheriff's Office Police and security protection includes 24 hour security patrols throughout the coIIlJ)1.unity in addition to còrne prevention, crime suppression and traffic safety. Schools. Public educational services to the project area are provided by the Dublin Unified School District (DUSD). There would be no change to the boundary of the DUSD should be proposed reorganization be approved. Maintenance. Other than limited County roads within the project area (Tassajara Road), the County provides limited maintenance service to the project area. Upon annexation to the City of Dublin maintenance of streets, roads and other public facilities within the project area would be the responsibility of the City of Dublin Public Works Department. Solid Waste Service. The County does not currently provide solid waste disposal service: property--Qwuers must dispose of waste at local transfer stations. Upon annexation to the City of Dublin, solid waste service would be provided by the LivermorelDublin Disposal Company. Other services; Residents of the project area use the Alameda County library services and other government services provided to Alameda County residents. Upon annexation to the City of Dublin, many of these services would be provided by the City. City of Dublin Initial StudylWallis Ranch Annexation PA 02-028 Page 46 February 2003 Proiect Inmact~ and Mitie:ation Measures Although the Eastern Dublin EIR addressed the impacts of development of the project area on services and mitigation measures were adopted to reduce the identified impacts to a less than significant level, some of these impacts still may be potentially significant for the project area due to changed circumstances. a) Fire protection? LS. The project proposes up to 1,094 new residences to be developed in phases. The general number of new residences was evaluated by the Eastern Dublin EIR for the project area. Demand for fire services and fire response to outlying areas were considered significant impacts (1M 3.4/D and 3.4Æ) and with implementation of mitigation measures (MM 3.4/6.0 - MM3.4/11), these impacts are 1es$-than-significant. These mitigation measures require construction of new facilities timed to coincide with development; require appropriate funding mechanisms for capita} improvements; identify and acquire new fire station sites; and incorporate fire safety measures into project design. There are no impacts beyond those analyzed in the Eastern Dublin EIR and therefore no additional review or analysis is necessary. b) Police protection? LS. Development of the project as proposed could result in approximately 2,400 new residents in the project area. The number of new residents was evaluated by the Eastern Dublin EIR for the project area. Demand for police services and police services accessibility were considered significant impacts (1M 3.4/A and 3.4Æ) and with implementation of mitigation measures (MM 3.4/6.0 ~ MM3.4/11), these impacts are less-than-significant. These mitigation measures include provision of additional persona] and facilities; coordination of development timing to services can be expanded; incorporation of police department recommendations into project design; and preparation of budget strategies for personnel and facilities as annexing areas become served by Dublin's Police Department. The adopted mitigation measures would continue to apply to the project. There are no impacts beyond those analyzed in the Eastern Dublin EIR and therefore no additional review or analysis is necessary. c) Schools? PS. New K-12 students would be generated by implementation of the proposed project. Changes in student generation rates due to changed regional economic circumstances may have a different impact on the number and age distribution of students originally anticipated and evaluated by the Eastern Dublin EIR. In addition, the type and quantity of schools originally expected to have been constructed according to the Eastern Dublin EIR may have changed. Also, the level of funding and amount of school fees which may be charged according to State law may have changed so that the project could have a different impact on the provision of school facilities and programs. This could be a potenti411y significant impact. City of Dublin Initial StudylWallis Ranch Annexation PA 02-028 ' Page 47 February 2003 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I d) Maintenance of public facilities, including road$? LS. New streets and roads are proposed be constructed in the project area. All such streets and public facilities would be constructed by the project developers. Maintenance of these facilities was anticipated by the Eastern Dublin EIR and considered a significant impact (1M 3.l2lA and 3.l2Æ). Implementation ofmitigarion measures (MM 3.1211.0----8.0) reduce this impact to a level of insignificance. These mitigation measures encourage development agreements; adoption by the City of an area of benefit ordinance; creation of Special Assessment of Mello Roos Community Facilities Districts; City evaluation of Marks~Roos bond pooling; and consideration of City-wide developer and builder impact fees. The adopted mitigation measures would continue to apply to the entire project. There are no impacts beyond those analyzed in the Eastern Dublin EIR and therefore no additional review or analysis is necessary. 14. Recreation Environmental Settin!¡! Since the project area is not currently developed with urban uses the area contains no parks or other recreational facilities. Nearby community and regional parks include Emerald Glen'Park, a 50-acre city park now being developed by the City of Dublin immediately west of Tassajara Road, and two community parks slated for development elsewhere in the Eastern Dublin area. The combined area of the two community parks is 126 acres. Each of these parks would allow for organized sports activities and individual sports as well as for passive recreation. Numerous neighborhood parks and neighborhood squares have been included in the Eastern Dublin Specific Plan and General Plan planning areas. The East Bay Regional Park District also has developed a staging area on the west side of Tassajara Road and south- of the project area as part of a regional recreational trail system. The project proposes dedication of a 5.0 acre neighborhood park as well as pennanent open space within and adjacent to Tassajara Creek and on steeper slopes of the westerly portion of the project area. Project Imoacts and Mitil':ation Measures a) Would the project increase tfæ use of existing neighborhood or regioruzl parks? " PS. The proposed development would cause an increase in demand for neighborhood, community and regional park facilities due to an increase in the number of people within the project area. The Eastern Dublin EIR identified the demand for park facilities as a potentially significant impact (1M 3.4IK). Mitigation Measures have been adopted as policies within the General Plan and the Eastern Dublin Specific Plan (MMs 3.4/20.0 to 28.0) reduce this impact to a level of insignificance. These mitigation measures and policies encourage expanding park areas; maintaining and improving outdoor facílíties in confonnance with the City's Park and Recreation master Plan; acquire and improve parklands; require land dedication and improvements for parks; designate sites in the General Plan and Specific Plan areas; and implement Specific Plan policies for the provision and maintenance of open space. City of Dublin Initial StudylWallis Ranch Annexation PA 02-028 Page 48 February 2003 Proposed development on the Lin property would reduce neighborhood park acreage from 11.S to 5.0 acres. This issue wí1l be evaluated in the Supplemental EIR. There are no impacts beyond those analyzed in the ElIJJtem Dublin EIR and therefore no additional review or analysis is necessary. b)' Does the project include recreaticmal facilities or require the construction of recreational facilities? PS. The project includes a neighborhood park and open space land uses. However, part òf the development application on the Lin Property includes a proposal to reduce Neighborhood Park acreage from 11.8 to 5.0 acres. This could be a potentially significant impact to be evaluated in a Supplemental EIR. 15. Transportationfrraffic Environmental Setting The project site is served by a number of regional freeways and sub-regional arterial and . collector roadways, including: Interstate 1-5S0 and TlIJJsajara Road. Development of the proposed project would introduce new roadways and streets into the project area. No changes to the number or location of major roadways are proposed in the project than identified in the ElIJJtern Dublin Specific Plan and General Plan. Project ImDact~ and Mitigation Measures The ElIJJtem Dublin EIR addressed the traffic and transportation impacts of development of the project area and mitigation measures were adopted to reduce some of the identified impacts to a less than significant level. Due to increased urban development in the Tri- Valley area and beyond which may impact roadways within the project area, there could be the potential for additional transportation/traffic impacts. a) Cause an increase m traffic which is substantial to existing traffic load and street capacity ? PS. The Eastern Dublin EIR considered the development of the project area with S17 dwellings, an elementary school and 18,295 square feet of neighborhood commercial floor space, and indicated mitigation measures to address the impacts thereof. However, a proposed increase in the number of dwellings and changes in Tri-Valley commute patterns in addition to the anticipated Project traffic, may cause potentiaUy significantimpacts not anticipated by the Eastern Dublin EIR. These impacts could include traffic impacts within the project area, or at Project intersection, or on freeways, roads, etc. which the project may utilize. b) Exceed, either individually or cumulatively, a WS standard established by the County CMAfor designated roads? City of Dublin Initial StudylWallis Ranch Annexation P A 02~028 Page 49 February 2003 I I I I I I I I I I I I- I I I I I I I I I I I I I I I I I I I I I I I I I I PS. As noted above, the provision of 8 17 dwellings and neighborhood commercial floor space in the project area were anticipated and addressed in the Eastern Dublin EIR. The application for development on the Wallis Ranch property may exceed this amount of previously analyzed development and could be potentially significant. Potential impacts of proposed development on regional freeways and local roadways in conjunction with changing commute patterns and traffic intensities unrelated to the project may also cause potentially significant impacts not anticipated by the Eastern Dublin EIR. c) Change in air traffic patterns? NI. Development of the project area is not expected to create a change in air traffic patterns at the airport and hence would have no impact on air traffic patterns. d) Substantially increase hazards due to a design feature or incompatible use? LS. Approval of the proposed project and future development of the site would add new roads, driveways, sidewalks and other vehicular and pedestrian travel ways where none currently exist. Since these facilities will be required to be constructed to design standards established in the Eastern Dublin Specific Plan and City of Dublin Public Works Department, such impacts are anticipated to be less-than-significant. e) Result in inadequate emergency access? PS. The present need for emergency access is low, since there are few current residents or visitors to the site. Construction of new residences and neighborhood comroercial development within the project area could increase the need for emergency seIVices and related access to new tesidences and commercial establishments. The Eastern Dublin EIR anticipated and suggested mitigation measures to reduce such impacts. However, changes in Tri-Valley commute patterns and traffic intensities in addition to the anticipated project traffic may cause potentially ~gnificant impacts not anticipated by the Eastern Dublin EIR. For example, potential increased vòlumes of traffic unrelated to the project may create a potentially significant impact on emergency access capability on project streets or intersections during peak traffic hours. t) Inadequate parking capacity? NI. Parking for individual projects within the project area would be reviewed by the City of Dublin at the time such proposals are submitted to ensure consistency with City parking requirements. No impact is anticipated. g) Conflict with adopted policies. pl4ns or programs for alternative transportation? NI. Individual projects within the project area will be designed with sidewalks, pedestrian walkways and bicycle rou~ to minimize potential hazards to pedestrians and bicyclists and to support these alternative transportation modes. In accordance with the Eastern Dublin Specific Plan, bicycle routes and pedestrian trails are included as part of the proposed Project. The City and Eastern Dublin Specific Plan have standards by which bus turn-outs, bicycle paths, trails and sidewalks must be planned and constructed. Bus turn-outs are required to be installed by project developers in accordance with City requirements and bus service plans. These improvements City of Dublin Initial StudylWallis Ranch Annexation PA 02-028 Page 50 February 2003 will be confIrmed at the time each individual development project is reviewed by the City. No impacts are therefore anticipated. 16. Utilities and Service Systems Environmental Setting The project area currently is sel'Ved by the Alameda County Flood Control District Zone 7 as a regional water supplier and distributor and for storm drain facilities. The Dublin San Ramon Services District (DSRSD) would serve the project area upon completion of the reorganization as the water retailer; would provide wastewater collection and treatment; and would provide oppottUnities for the use of recycled water for landscape purposes. Since the project area is mainly undeveloped except for new residences and scattered outbuildings, current services to the project area are minimal. Upon annexation of the project area to the City of Dublin and prior to new development, project developers would be required to extend new services to the area to provide a public water supply for domestic and fire flow use, a recycled water service for irrigation of public medians and parks, and a public wastewater treatment system, all of which would connect with existing facilities maintained and controlled by DSRSD. Project developers would be required to install new storm drainage facilities which would connect with existing facilities maintained and controlled by the Alameda County Flood Control and Water Conservation District, Zone 7. Although most of these infrastructure facilities would be installed by Project developers, all of these systems would be public and would be maintained by public agencies such as the City of Dublin and the Dublin San Ramon Services District. Cable TV utilities also would be extended . to the project area. Project Impacts and Mitie:atÎon Measures The Eastern Dublin EIR addressed the provision and extension of services and utilities to the project area and mitigation measures were adopted to reduce some of the identified impacts to a less than significant level. However, additional or new potential impacts may be potentially significant for the project area due to changed circumstances (increased urban development in the Tri-Valley area, changes in water purveyor and distributor contracts, changes in the handling and disposal of wastewater, changes in supply and distribution of gas and electricity, etc.) a) Exceed wastewater treatment requirements of the RWQCB? PS. Changes in circumstances due to regional policy changes, funding mechanisms and timing of infrastructure improvements may create a potentially significant impact. b) Require new water or wastewater treatment facilities or expansion of existing facilities? PS. Iu. noted above, changes in circumstances due to regional policy changes, funding mechanisms and timing of wastewater infrastructure improvements may create a potentially significant impact. City of Dublin Initial StudylWallis Ranch Annexation PA 02-028 Page 5' February 2003 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I c) Require new storm drainagefaci/ities? PS. New facilities will be needed as a result .of development and may exceed those previ.ously analyzed. This may be a potentially significant impact. d) Are sufficient water supplies available? PS. DSRSD, which wauld pr.ovide water service and supply ta project area has included the project within its master plans and projecti.ons. H.owever, since the number .of dwellings proposed for construction an the Wallis Ranch property could exceed the number of dwellings analyzed in the Eastern Dublin ElR, this may be a potentially significant impact. e) Adequate wastewater capacity to serve the proposed project? PS. Appraval .of the propased project and development .of the area cauld result in an increased demand far wastewater treatment over present conditians. Due to increased and more rapid deve1apment in the Tri- Valley area there may be a patential need ta expand the capacity of the treatment plant earlier than .originally anticipated by the Eastern Dublin EIR. This cauld be a potentially significant impact. t) Solid waste disposal? PS. Development of the project as proposed c.ould incrementally increase the generatian of solid waste. Although this impact was addressed in the Eastern Dublin EIR, changed circumstances due ta mare rapid develapment in the Tri- Valley area in combinatian with the anticipated project could have a potentiaily significant impact an the availability .of s.olid waste dispasal services. g) Comply with federal, state and local statutes and regulations related to solid waste? NI. The City .of Dublin and the solid waste halder wauld ensure that develapers ar'individual prajects constructed in the Project area wauld adhere ta federal, state and lacal salid waste regulations; therefore, no impaCt would result. h) Gas and electricity? PS. Prior to the current state-wide energy crisis, PG&E had the ability to adequately serve the Tri-Valley with existing facilities until approximately June 2002. PG&E has proposed the Tri- Valley 2002 Capacity Praject ta increase electric service by adding substatians in Dublin and North Livermare, expanding the Vineyard Substation in Pleasanton and installing approximately 23.5 miles .of 230 kilovalt (kV) transmissian lines to serve the substatians (CPUC, 2000). PG&E is praposing canstructian of a 5-acIe, 230/21 kV substatian with faur 45 megawatt transf.ormers in eastern Dublin. If the Tri- Valley 2002 Capacity Increase Project .or a functional equivalent project is not constructed, PG&E would be required to respond to grawing demand by expanding its existing system to the extent that is passible and by curtailing service if growth in demand exceeds the transmission system's capacity or reliability requirements f.or essential services (such as hospitals). It is passible that if the Tri- Valley 2002 Capacity Increase Project is delayed, then ather alternatives W.ou1d be identified. At the present time, PG&E has c.ommenced work on the Capacity Increase Pragram City .of Dublin Initial StudylWallis Ranch Annexatian PA 02-028 Page 52 February 2003 The impacts of the project on the consumption of non-renewable resources is identified in the Eastern Dublin EIR (IM 3.4/S) and mitigation measures (MM 3.4145.0 - 3.4/46.0) are adopted as part of the project in an effort to reduce natural resource consumption and encourage energy conservation, the impact was detennined to be unavoidable and adverse. Pursuant to CEQA, a Statement of Overriding Consideration was adopted by the City Council for this impact. However, the current uncertainty of the supply of energy to the state as a whole, the potential bankruptcy of the electricity and gas service provider, and the potential lack of new energy- providersfpower facilities may have a potentially significant impact. 17. Mandatory Findings of Significance a) Does the project have the potential to tkgrade the quality of the environment, substantially reduce the hcbitat of a fish or wildlife species, cause a fish or wildlife population to drop below self-sustaining levels, threaten to eliminate a plant or animal . community. reduce the number of or restrict the range of a rare or endtm.gered plant or animal or eliminate important examples of the major periods of California history or prehistory ? YES. Please refer to the discussion in the Biological Resources section above_ b) Does the project have impacts that are individually limited. but cumulatively considerable? ("Cumulatively considerable" means that the incremental effects of a project are considerable when viewed in connecticn with the effects of past projects, the effects of other current projects and the effects of possible future projects.) YES. Although the Eastern Dublin EIR addressed the cumulative impacts of development of the project area within its evaluation of the overall Eastern Dublin planning area, changed circumstances mentioned throughout this Initial Study may contribute to changed cumulative impacts which should be further analyzed. c) Does the project have environmental effects wmch will cause substantial adverse effects on human beings, either directly or indirectly? YES. The Eastern Dublin EIR addressed the potentially significant adverse impacts of the proposed project through its evaluation of the proposed Eastern Dublin Specific Plan and General Plan Amendment. The Eastern Dublin EIR suggested mitigation measures which reduce many such impacts to a less-than significant level and where sllch impacts could not be reduced or othetwise had a cumulative adverse impact, the City Council adopted a Statement of Over-riding Consideration pursuant to CEQA Guidelines. As discussed previously in this document, however, changes in circumstanCes since the Eastern Dublin EIR was certified have the potential for significant effects beyond those analyzed in the Eastern Dublin EIR. . City of Dublin . Initial StudyM'allis Ranch Annexation PA 02-028 Page 53 February 2003 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I, I I Initial Study Preparer Jerry Haag, Consulting Planner References Eastern Dublin General Plan. Amendment and Specific Plan Environmenta] ImDact Report, Wallace Roberts and Todd, 1994. Eastern Dublin SDecific Plan, June 6, 1998 City of Dublin General Plan, revised July 7, 1998 Projections 2000, Association of Bay Area Governments, December 1999 Persons/Agencies Contacted in Preparation of this Docum~t City of Dublin, Public Works Department City of Dublin, Planning Department MacKay and Somps City of Dublin Initial Study/Wallis Ranch Annexation PA 02-{)28 Page 54 February 2003