Item 21 - PFAS Treatment System at Well 38

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Appropriation Adjustment and Agreement with OCWD for Well 38 Treatment Facility August 17, 2021 Page 2 1 9 5 1 sources via Metropolitan Water District of Southern California. In order to remain in line with this ratio, the City has worked with OCWD in developing treatment facilities which are capable of reducing PFAS concentrations in water pumped from the Basin to below the NLs or future Maximum Contaminant Levels (MCLs). On May 19, 2020, the City Council authorized the City Manager to execute the PFAS Treatment and Facilities Agreement (Exhibit 1) with OCWD in response to the presence of PFAS in the Basin. The agreement provides for OCWD to design and construct PFAS treatment systems for City wells that have levels at or above 80% of the RL. At the time the Agreement was executed, Well 38 samples exceeded these levels, and met the criteria for a treatment system. Upon subsequent quarterly testing, the interval required by DDW, PFAS concentrations at Well 38 fell below 80% of the RL, the threshold required for a PFAS treatment facility as defined in the terms of the Agreement. Although the current levels are below the threshold, staff recommends that a PFAS treatment facility be installed at Well 38, and has requested that OCWD continue with the design, procurement and construction management activities, as initially planned per the terms of the Agreement. Should water sampled from Well 38 continue to fall outside the terms of the Agreement, the City will reimburse OCWD for all related costs. However, per the terms of the Well 38 PFAS Agreement (Exhibit 2), if future water samples from Well 38 meet concentration levels stated, OCWD would reimburse the City for design and construction costs paid to OCWD. Staff recommends approval of an appropriation adjustment, agreement, and amendment to the Fiscal Year 2021-22 Capital Improvement Program to include this project (Exhibit 3). ENVIRONMENTAL IMPACT The environmental impact associated with this action is unknown at this time. It is anticipated that this project will be covered by a Categorical Exemption under the California Environmental Quality Act (CEQA). FISCAL IMPACT The estimated total design and construction delivery costs of the Well 38 Treatment Facility project are $6,000,000 (Project No. 22-6470). Approval of the requested Appropriation Adjustment will recognize $1,000,000 from prior year fund balance in the Public Works Water Revenue, Prior Year Carry Forward revenue account (No. 06017002- 50001) and appropriate the same amount into the Acquisition & Construction, Water Utility Water Capital Projects, Water Capital Project expenditure account (No. 06617647- 66301) for expenditure in FY 2021-22. The remaining $5,000,000 will be budgeted in future fiscal years based on the project schedule. Should Well 38 exceed 80% of state Response Levels for two consecutive quarters, OCWD will reimburse the City for costs paid by the City to OCWD for the design and construction of the Well 38 treatment system.