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INITIAL STUDY <br />J.R. SEWPLOT COMPANY, TANK STORAGE FACILITY <br />RCRA CLOSURE PLAN <br />This facility and property are owned and operated by J.R. <br />Simplot Company. The project is located at 16777 South Howland <br />Road, Lathrop. The project is located in an industrial corridor of <br />southeastern Lathrop. The facility manufactures and stores <br />agricultural fertilizers. <br />ProieCt DescriDtion <br />J.R. Simplot Company (Simplot) has applied for closure <br />(termination) of their hazardous waste facility and interim status <br />document. Simplot has submitted a Closure Plan (Plan) which <br />describes decontamination of their two aboveground 150,000 gallon <br />storage tanks, a 10,000 gallon underground storage tank, collection <br />sumps, and appurtenances. The equipment will be scrapped, reused, <br />or disposed as hazardous waste. Confirmation sampling of the <br />equipment will be done prior to final deposition. In addition, <br />samples will be collected from nearby soil and concrete to verify <br />no contamination remains. The Plan is available for review at the <br />City of Lathrop, Planning Department, 16775 Howland Road, Lathrop. <br />The aboveground tanks are located in an outdoor tank farm, on <br />the central portion of the property called the Ag Chem Area. The <br />aboveground tanks are 30 feet in diameter and 30 feet in height. <br />The tanks are identified as Tank 127 and Tank 128. Since the early <br />1970's, the tanks were used by Occidental Chemical Company (OXY) to <br />store stormwater and pesticide production rinsewater Simplot <br />purchased the facility in 1983. In 1988, Simplot discontinued <br />pesticide formulation and cleaned out the tanks. One tank was <br />reused for stormwater collection and the second tank was taken out <br />of service. In 1991, Simplot converted the tank to fertilizer <br />product storage. <br />The underground storage tank is located next to the railcar <br />loading area. The tank and collection sumps were used to capture <br />spillage and rainwater from the area. It measures 8 feet in <br />diameter, and 30 feet long, and is approximately 9 feet below the <br />ground surface. <br />The draft Plan proposes to conduct confirmation samples of the <br />aboveground tanks. Simplot decontaminated the tanks which they <br />were removed from greater than 90 day hazardous waste storage in <br />