HomeMy WebLinkAbout04-19-2021 AGENDA PACKETDSRSD Representatives Zone 7 Representatives Dublin Representatives
President Johnson President Sanwong Mayor Hernandez
Vice President Halket Director Ramirez Holmes Councilmember Hu
Director Smith McDonald Councilmember McCorriston
AGENDA
DUBLIN SAN RAMON SERVICES DISTRICT / ZONE 7 WATER AGENCY / CITY OF DUBLIN
LIAISON COMMITTEE MEETING
Virtual via Zoom
NO ACTION TO BE TAKEN
Monday, April 19, 2021
4 p.m.
Meeting Procedure During Coronavirus (COVID-19) Outbreak:
In keeping with the guidelines provided by the State of California and Alameda County Department of Public
Health regarding gatherings during the coronavirus (COVID-19) outbreak, and recommendations to follow social
distancing procedures, the following practices are adopted for this meeting:
The meeting will be held remotely via Zoom Video Communications:
https://dublinca.zoom.us/j/81539246883?pwd=TmVFcm1Xa2UwbjhEeVp3ZjFtaFZodz09
Passcode: rcazFj1a
For audio only, you can join the meeting by telephone: (669) 900-9128
Webinar ID: 815 3924 6883
Passcode: 30013301
All attendees will be muted and be in listen-only mode.
Individuals wanting to make public comment may email city.clerk@dublin.ca.gov starting at 1 p.m. on
Monday, April 19, 2021. Please provide your name and the agenda item you would like to speak on.
Written comments may be emailed by 4 p.m.
When the agenda item upon which the individual would like to comment is addressed, the speaker will be
announced in the meeting when it is his/her time to speak to the DSRSD/Zone 7 Water Agency/City of Dublin
Liaison Committee. The speaker will then be unmuted for comment.
1.Call to Order
2.Public Comment
At this time, audience members are encouraged to address the Committee on any item of interest that is within the subject
matter jurisdiction of the Committee and not already included on the agenda. Comments should not exceed five minutes.
3.Approval of Minutes
4.Discussion Items
4.A. DSRSD Recycled Water Program Update
4.B.Tri-Valley Water Supply 1 of 17
5.Future Agenda Items
6.Adjournment
This AGENDA is posted in accordance with Government Code Section 54954.2(a). If requested, pursuant to Government Code Section
54953.2, this agenda shall be made available in appropriate alternative formats to persons with a disability, as required by Section 202 of
the Americans with Disabilities Act of 1990 (42 U.S.C. Section 12132), and the federal rules and regulations adopted in implementation
thereof. To make a request for disability-related modification or accommodation, please contact the City Clerk’s Office (925) 833-6650 at
least 72 hours in advance of the meeting.
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Recycled Water
Update
Jan Lee
Assistant General Manager
Liaison Committee Meeting
April 19, 2021
Item 4.A.
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Recycled water partnership
San Ramon Valley Recycled Water
Program -2006
A formal partnership between
DSRSD and East Bay Municipal Utility
District (EBMUD)
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Pleasanton joined in 2014
Pleasanton is the third
agency receiving water
from the San Ramon
Valley Recycled Water
Program
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0
500
1000
1500
2000
2500
3000
3500
DSRSD EBMUD Pleasanton
Growth of Recycled Water Demand
(in Acre Feet)
2006 & 2020 2006 & 2020 2006 & 2020
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Seasonal recycled water use
5
580 625 726 723
903 959 1,034 1,050 1,047 1,098
783 684
19 75
129 141
352
433
487 490 422 383
148
77
0
200
400
600
800
1000
1200
1400
1600
January February March April May June July August September October November December
To
t
a
l
W
a
t
e
r
U
s
e
,
A
F
Monthly Water Consumption -Calendar Year 2020
Potable Water
Recycled Water
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Recycled water is limited by wastewater availability
6
8 of 17
Conservation has had a major effect on wastewater flows
7
0
5,000
10,000
15,000
20,000
25,000
2000 2005 2010 2015 2020 2025 2030 2035 2040
Av
e
r
a
g
e
W
W
T
P
i
n
f
l
u
e
n
t
,
A
F
Y
DSRSD WWTP influent projections over time
2010 UWMP Projections
2017 WWTP Master Plan Projections
Actual WWTP influent
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Projected water demand
in 2045
•Total: ~16,000 AFY
•Increase: ~2,900 AFY
Recycled water
•Potential to offset ~30%
of demand increase
•Contingent on wastewater
availability
DSRSD future demand for recycled and potable water
8
10 of 17
Expanding recycled water increases potable supply reliability
9
Supplemental volume could meet DERWA demand
in summer months…
…and support more recycled water use
in shoulder months
Limit: WWTP influent
Maximizes recycled water supply
Leverages existing infrastructure
Reduces peak potable demands
Offsets the need for new supplemental potable supply
Benefits 11 of 17
Supplemental recycled water sources
Seasonal storage
Wastewater from
a neighboring agency
RO concentrate
Groundwater
10
Source: Zone 7 Preliminary Chain of Lakes Evaluation Update, 2020
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Supplemental recycled water sources
Seasonal storage
RO concentrate
Wastewater from
a neighboring agency
Groundwater
11
Mocho Demineralization Plant
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Supplemental recycled water sources
Seasonal storage
RO concentrate
Wastewater from
a neighboring agency
Groundwater
12
Central San Diversion Project
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Supplemental recycled water sources
Seasonal storage
RO concentrate
Wastewater from
a neighboring agency
Groundwater
13
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Next steps
Explore opportunities to expand recycled
water in partnership with other agencies
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Questions?
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