STANTEC CONSULTING SERVICES, INC. (4)

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TASKS NECESSARY FOR SUCCESSFUL COMPLETION Scope of Services The following defines our scope of services included within this proposal and our fee estimate. 1. PLANNING STUDY AND CONSULTING SERVICES The Stantec team will perform a Planning Study for the City in which the number of wells impacted by PFAS, their location, and areas available for a treatment system(s) and site access will be examined. The Planning Study will assess how the treatment systems) would be integrated into the City's existing operations, help determine whether a centralized treatment plant is feasible for combining wells, provide alternative design options, assess the potential for blending, provide initial support for permitting and develop capital costs associated with potential land acquisition, permitting, pipeline connections and system integration. The scope of work consists of the following for the Planning Study: A. MANAGEMENT ACTIVITIES Stantec will conduct project management activities to facilitate adherence to budget and schedule. Our team will coordinate and attend meetings with City staff during the planning study, consisting of the following: one project kick off, two planning workshops, one review meeting for the draft report. These meetings will be held virtually via Microsoft Teams except the kick-off meeting, assuming this is the City's preference. Stantec will provide minutes for each meeting as well as biweekly progress updates to the City. WELL ASSESSMENT AND INITIAL TREATMENT DESIGN Stantec will review information provided by the City on the City's groundwater conveyance systems, impacted wells, reservoirs, imported water connections. Our team will conduct site visits per the City's request to help determine available area of land for the PFAS treatment systerl which are assumed to be able to be completed in two full days. Stantec will assess how the treatment systems) will be integrated into the City's existing operations. We will also review existing and available information on the City's historical PFAS bench- and pilot -scale testing, as well as historical Planning Studies performed and existing PFAS treatment facility layouts, and adhere to the standards set therein. In the preliminary Planning Study, the Stantec team will provide a conceptual layout for each requested location by the City based on existing ion exchange (IX) treatment systems (Aqueous Vets System rated for 150 PSI). For all IX wellhead treatment designs, we will include cartridge filter pre-treatment, a sand separator, IX lead -lag system capable of addressing the well(s)s gallon per minute capacity, an emergency generator, and an additional sound attenuated booster pump to combat the head loss experienced through the new treatment system. C. PERMIT ASSESSMENT Stantec will perform an initial permitting assessment to understand any requirements, as well as develop a list of required permits (including permit description, issuing regulatory agency, summary of permit requirements, and permit acquisition timelines). D. FEASIBILITY STUDY The Planning Study will include a feasibility study in which we will investigate hydraulic conditions of existing wells and help determine what modifications to existing well pumps and booster pumps will be necessary, if any, for the installation of the proposed PFAS wellhead treatment facilities. E. COST ESTIMATES Stantec will provide an opinion of probable construction costs (OPCC) for the treatment facility equipment, any necessary land acquisition to accommodate a treatment system(s), permitting, plumbing connections, transmission alignments and system integration. Stantec will also provide capital, maintenance and operation cost estimates for IX treatment systerl F. PRELIMINARY SCHEDULE Stantec will develop a preliminary phasing schedule for construction in the Planning Study. The plan is intended to provide the City a schedule and projected annual outlays for financial planning. In the preliminary schedule, we will include the anticipated duration of construction, as well as utility extensions required. RT The final report will consist of a summary of the planning study items listed herein and will be submitted to the City for review and comments. We will provide a PDF digital copy of the preliminary report and shall incorporate comments made by the City prior final report submission. Our final report will also include a summary of major City of Santa Ana On -Call Engineering Design Services for PFAS Treatment Systems RFP NO. 22-133 14