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The handling and cost implications of such future regulations should be studied, and risk management strategies should be developed, as part of a comprehensive planning approach to PFAS impacts. Santa Ana is aware of EEC's unique PFAS waste disposal expertise and we propose to integrate waste disposal into the Planning Study scope of work. Additional cost savings measures can be studied and identified including spent media dewatering strategies and contracting opportunities with other Producers to allow for bulk service cost savings. Grant Funding The installation, operation, and ongoing maintenance of PFAS treatment systems presents a significant new cost to Santa Ana. EEC proposes to research potential grant funding opportunities, or low interest loan opportunities, to offset or mitigate project costs. Among other potential opportunities, EEC proposes to research Drinking Water State Revolving Fund (DWSRF) program eligibility for project planning, design, and construction costs. Source Investigation and Cost Recovery The City of Santa Ana is a named plaintiff in the OCWD-led lawsuit of PFAS manufacturers over their alleged responsibility in contaminating the Orange County Groundwater Basin (Basin) and may receive cost recovery funds from that lawsuit to offset PFAS treatment system costs. However, the named defendants in the lawsuit may not be the only responsible parties for local contamination within the Basin. If Santa Ana is interested, EEC can analyze existing groundwater PFAS concentrations, hydrogeologic patterns, and available industry and land use data, to facilitate source investigation efforts to identify potential, local sources of PFAS contamination. At their discretion, the City could then pursue cost recovery from potentially responsible parties to offset or reimburse project costs associated with PFAS treatment. ERelevant Experience EEC I City of Santa Ana I Owner's PFAS Representative 12020 - Ongoing Team: Will Shaffer, Dennis Kasper, Jim Kolk, John Shaffer, Brandon Willnecker Project Contact: EEC is providing ongoing expert consulting services to Santa Ana as it works with Cesar Barrera, PE the Orange County Water District (OCWD) and their consultants to design and Deputy Public Works Director install wellhead PFAS treatment for the City's impacted wells. EEC is providing (714) 647-3387 comprehensive technical and regulatory assistance to the City addressing a variety of topics including: • The impact of the State's PFAS Notification Levels (NLs) and Response Levels (RLs) on the City's groundwater supply. • Comparison of Granular Activated Carbon (GAC) vs. Ion Exchange (IX) as viable treatment alternatives at each potentially impacted well site. • Evaluating capital costs vs. on -going O&M costs. • Evaluating rapid small scale column testing (RSSCT) and pilot testing results and the need for further pilot tests. • Water distribution system planning to balance groundwater production and water imports, while minimizing costs, to maintain a secure water supply. • Treatment system training for City engineers, operators, and maintenance staff. • Treatment system design peer review (Wells 27, 28, 31, 38, and 40). • Treatment system construction oversight services. EEC Environmental I 1 November 17.2022