CONSIDER CREATION OF CIP PW 22-36 FOR AQUIFER STORAGE AND
RECOVERY, AND APPROVAL OF AGREEMENT WITH CAROLLO
ENGINEERS, INC. AND RELATED BUDGET AMENDMENT
CITY COUNCIL REGULAR MEETING
ITEM 5.3, JANUARY 10, 2022
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, staff is requesting that City Council consider creating a Capital Improvement Project (CIP) to evaluate the use of Aquifer Storage and Recovery (ASR).
2 ASR – PROPOSED PROJECT
ABOUT
Aquifer Storage and Recovery (ASR) is a water supply strategy. ASR does not create water.
HOWASR SYSTEMSWORK
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.
TIMELINE – LONG TERM PROJECT
3 Feasibility Study
& Test Well Design Construction Permitting Operation
2022 2023 2024 2025
$300,000 $3-5 Million
Funding: Building Resilient Infrastructure and Communities (BRIC) WHAT IS ASR?
4 Graphic Source: https://www.trwd.com/aquifer-storage-may-become-the-next-big-player/
ASR ACROSS THE COUNTRY AND LOCAL
5 Woodland, CA - ASR
POTENTIAL BENEFITS OF ASR
6 Long-term storage or water banking to improve water supply reliability Improve water quality
Seasonal storage
Reinforce surface water rights through demonstratedASR storage Hydraulic control of contaminant plumes
Enhance conventional wellfield production
Raise groundwater levels
Maintain distribution system flow and pressure
Reclaimed water storage for reuse
Defer the need for additional capital investment
Graphic Source: https://www.austintexas.gov/department/water-forward-drought-supplies
FEASIBILITY STUDY COMPONENTS
7 ASR Objectives
Water Supply,Water Demand, andWater Quality
Disinfection of the RechargeWater
Hydrogeology
Storage Zone andWell Site Selection
Conceptual Design of ASR and MonitoringWells
Preliminary Baseline and Cycle Testing Program
ASR Economics
Legal and Regulatory Issues
Recommendations andTimeline