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TETRA TECH <br />April 10, 2019 <br />Arjuna Weragoda, P.E. <br />Indian River County Department of Utility Services <br />1801 27th Street, <br />Vero Beach 32960-3388 <br />Email: aeragoda@ircgov.com <br />Subject: Proposal to Indian River County for Due Diligence and Project Review <br />West Regional WWTF Reclaimed Water Storage <br />Change Order for Limited Phase II Environmental Site Assessment <br />Dear Mr. Weragoda: <br />Tetra Tech, Inc. (Tetra Tech) is pleased to provide Indian River County with this Scope of Work <br />for Limited Phase II Environmental Site Assessment (ESA) services for the Premier Citrus, LLC <br />properties, located at 200 90th Avenue, 8250 1st Street, and 375 82nd Avenue, Vero Beach, <br />Florida, 32968 (Site). Indian River County is evaluating the property purchase and construction <br />of a reclaimed water storage area on a parcel located immediately to the south of the West <br />Regional Waste Water Treatment Facility (WWTF). <br />BACKGROUND <br />Indian River County needs additional storage of reuse water from the West Regional WWTF <br />during the rainy season when the necessity for reuse water is limited. The West Regional <br />WWTF is sized for a treatment capacity of 6 million gallons per day (MGD). The plant is <br />currently operating at approximately 2 MGD but can only discharge approximately 0.4 MGD or <br />exceed the load allocations into the relief canal. The remainder of the treated water is sent back <br />to the community for reuse. The goal of the proposed reclaimed water storage will be to provide <br />sufficient capacity to store water during the wet season and supply reuse water in the dry season <br />and achieve a zero discharge to the relief canal. <br />The county has identified an approximately 250 -acre parcel immediately to the south of the West <br />Regional WWTF as a potential site for the reclaimed water storage. It is zoned RS -3 and is a <br />citrus grove. The County contacted Tetra Tech to complete due diligence required to assess this <br />potential project, zoning and permitting issues associated with project, geotechnical conditions, <br />limitations from Federal Aviation Administration (FAA) or other agencies, and other business <br />and environmental risks associated with the purchase of the proposed parcel. <br />Tetra Tech conducted a Phase I ESA as part of Work Order No.2 under Tetra Tech's Continuing <br />Consulting and engineering Services Agreement with Indian River County. Although the <br />assessment has not been finalized, Recognized Environmental Conditions (RECs) were <br />identified, and a Limited Phase II ESA was recommended on an expedited turnaround to meet <br />the 90 -day due diligence period. RECs identified to date include: <br />Tetra Tech, Inc. <br />1 I Riverside Drive, Suite 204, Cocoa, FL 32922 <br />Tel 321.636.6470 Fax 321.636.6473 www.tetratechgc0r7 <br />