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Our #1 goal is to facilitate a safe working environment while delivering a high -quality system on time and within budget. All team members are committed to doing what it takes to ensure this goal. System Commissioning and Start Up Approach The project does not end until the system is fully operational, permitted, and supplying the residents of Santa Ana with PFAS-free water. EEC will develop a commissioning plan with buy in from City engineers and operators, the contractor, and OCWD (if necessary). Continuous support and as appropriate on -site presence will be provided during the entirety of commissioning to ensure a smooth start-up. There will be clear delineation of responsibilities for all parties. Lessons learned from EEC's and Santa Ana's tows of Fullerton and Yorba Linda Water District (YLWD) PFAS treatment systems will be included in the commissioning plan including, but not limited to: continuous flushing during Bac-T sampling, well pump tax exemption request during flushing, holistic SCADA testing, stocking additional bag filters, and other items of concern. This valuable learned experience will translate to faster system startup and fewer complications along the way. Value Added Services EEC has built a sterling reputation in no small part because we are constantly looking out for our Clients' best interests. We are not simply trying to execute the terms of the contract. We are looking for ways to bring additional value to our Clients. That may be by providing value engineering services, pursuing outside -the -box solutions, or providing additional services that lower long-term operational labor and costs. To this point, the EEC Team has developed a short list of proposed scopes of work not already identified in the RFP that will provide additional short- and long-term value to Santa Ana as you build out your domestic water treatment systems. Bench Scale Pilot Testing OCWD undertook the largest PFAS pilot program in the nation's history, gathering an unprecedented amount of data related to the treatability of PFAS in drinking water supplies, and the evaluation of best available treatment technologies (namely, GAC, IX, and novel adsorbents). OCWD has continued this work in a second phase of their pilot study. However, the market for effective treatment media is exploding due to the exponentially growing demand for PFAS treatment systems nationwide. Therefore, manufacturers are continually developing new GACs, IX resins, and novel adsorbents. Not all of these technologies are being evaluated by OCWD in their pilot program. Additionally, OCWD is not performing bench scale testing for all media (namely, IX resin) on source water from all groundwater wells within the Basin. This data gap, coupled with the relatively cost-effective nature of bench top testing, presents an opportunity for the City to perform its own bench scale testing of commercially available treatment media on City -selected source waters. This testing can inform media selection decisions and estimate media change out frequencies to allocate the appropriate City budgets. EEC proposes to utilize the unparalleled experience and capabilities of WQTS to conduct bench -scale testing of PFAS removal with a minimum of two IX resins, and one adsorptive media for a minimum of one well's source water. All proposed adsorbents would be commercially available with NSF61 certification for drinking water treatment application. A preliminary scope of work is provided in Section G below. Upon request, EEC can provide a more detailed scope of work and cost proposal to conduct the proposed study. PFAS Waste Disposal Study The disposal of PFAS-laden waste is a unique challenge for Producers and should be accounted for in the planning and design stages for each project. Waste transportation and disposal of PFAS-laden waste is complicated by the unknown regulatory environment surrounding PFAS. While not currently regulated as a Resource Conservation and Recovery Act (RCRA) hazardous waste, non -hazardous landfills do not currently accept PFOS or PFOA-laden waste as a protective measure in anticipation of future regulation. Therefore, this waste must be disposed of at Class 3 hazardous waste landfills which adds significant transportation and disposal costs. Furthermore, the potential for PFOS and PFOA to be designated as hazardous substances under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), has many generators taking proactive, conservative waste disposal measures to mitigate future potential liabilities under CERCLA. EEC Environmental 10 November 17, 2022