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yet been submitted. Test drilling atthe Amador Valley Community Park location was completed in March 2022. DISCUSSION The next steps for advancing the project includes the prepurchase of PFAS treatment vessels and installation of Well 9 and 10 casings in early 2023 with an estimated construction cost of $5.2 million and $2.4 million, respectively. However, before proceeding with the project, there are several reasons the City may wantto considera regional water supply option as noted below: • The project cost estimate was last prepared in June 2021 and is currently being updated to reflect currenteconomic conditions. Although not yet completed, itis anticipated the cost estimate may increase up to 30 percent due to the impact of recent inflation trends on the bidding market. • The City currently does not own or operate a water treatment plant and the PFAS treatment facility will require additional staff and have significant annual operational costs for treatment media procurementand disposal. These are substantial long-term costs to be directed at only 20 percent of the city's water supply. • A changing regulatory environmentwill continue to add uncertaintyand potential liabilityto the City as it will be responsible for contaminant removal from the water it produces. • Acceptable contaminant levels are declining and may require continual changes in treatment techniques and technologies to meet requirements. Given the above, staff recommends suspending project implementation before incurring the initial well and vessel costs to allow additional time to evaluate alternatives. CONCLUSION Staff recommends the City suspend implementation of the PFAS Treatment and Wells Rehabilitation Project at this time to furtherevaluate alternatives. Submitted by: Fiscal Review rc,..,,. 11Etiy l - L Tamara Baptista Susan Hsieh Interim Director of Operations Finance Director and Water Utilities Page 3 of 3 Approved by: Gerry Beaudin City Manager