RECEIVE UPDATE FOR AQUIFER STORAGE & RECOVERY, APPROVE
AMENDMENT NO. 1 WITH CAROLLO ENGINEERS, INC., CIP PW 22-36
CITY COUNCIL REGULAR MEETING
ITEM 5.2, APRIL 10, 2023
1 BACKGROUND
The City’s drinking water comes from two sources, local groundwater and surface water purchased from the South San Joaquin Irrigation District (SSJID).
The City’s water supply is reliable and staff has taken the necessary steps to plan for future growth and the corresponding water needs, however, there are some risks that are especially challenging to plan for. These risks include but are not limited to; prolonged droughts, new State regulatory requirements, emerging groundwater contaminants, and management of upstream reservoirs. To mitigate these risks and further protect the City’s water supply needs, City Council approved the creation of Capital Improvement Project (CIP) PW 22-36 to evaluate the use of Aquifer Storage and Recovery (ASR) on January 2022.
Staff submitted a grant application to DWR under the Urban Community Drought Relief Grant Program in the amount of $4,500,000.
2 ASR – PROPOSED PROJECT TIMELINE
TIMELINE – LONG TERM PROJECT
3 Feasibility Study
& Test Well Design Construction Permitting Operation
2022 2023 2024 2025
$300,000 $3-5 Million
WHAT IS ASR?
4 Graphic Source: https://www.trwd.com/aquifer-storage-may-become-the-next-big-player/ ASR is a water supply strategy
and does not create new water
When water supplies are
plentiful, an ASR system will
store available drinking water a
natural aquifer underground.
When our regular water supply
becomes low, stored water is
pumped out of the aquifer,
treated to meet drinking water
standards, and distributed to
customers.
5 • Australia
• India
• Bangladesh
• Israel
• Canada
• England
• Netherlands
• South Africa
• Namibia
• United Arab Emirates
• United States
• Others in development
Adelaide, Australia – ASR Well
ASR – GLOBAL IMPLEMENTATION
Manatee County, Florida ASR Well, 1983
ACEC Grand Award, 1984
6 State ASR Wellfields Wells
Florida 50 151
New Jersey 24 27
California 18 68
Arizona 13 51
Oregon 11 37
South Carolina 8 41
Colorado 6 45
Nevada 5 91
Iowa 4 4
Texas 7 45
Washington 3 7
Idaho 2 7
North Carolina 2 2
Delaware 2 2
VA, NM, SD, UT, ME, MN, KS, MS 1 each 9
January 2022:
About 700 ASR wells in about 140 ASR
wellfields in at least 25 States, and many
other countries.
ASR – NATIONWIDE
7 ASR –WOODLAND, CA
8 ASR – BENEFITS
• Long-term storage or
water banking to
improve water supply
reliability
• Improve water quality • Seasonal storage • Reinforce surface water rights through
demonstrated ASR
storage
• Hydraulic control of
contaminant plumes
• Enhance conventional
wellfield production
• Raise groundwater
levels
• Maintain distribution
system flow and
pressure
• Reclaimed water
storage for reuse
• Economic benefits
9 ASR – FEASIBILITY STUDY APPROACH
Reviewed available hydrogeologic
information
Selected preferred site with City
input
Drilled a test well
Performed water quality and
geochemical analysis
Developed conceptual site layout
for full-scale ASR well
10 ASR – FUNDING UPDATE
Funding application submitted in December 2022 under the Urban Community Drought Relief Grant program
Grant not awarded during first round of awards
Still under consideration for second round of awards with results in middle of 2023
Staff will continue to pursue additional funding opportunities as they become available
11 Drill monitoring well Preliminary Design Permitting Detailed Design • ASRWell • Well Site Equipping Bid Period Support Future Tasks • Engineering Services During Construction • ASRWell Commissioning
NEXT STEPS
RECOMMENDATION:
Staff request City Council adopt Resolution to Approve Amendment No. 1 with Carollo Engineers, Inc. for the Aquifer Storage and Recovery, CIP PW 22-36 and Approve Budget Amendment
12