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1988. The Plan allows for steamcleaning the tanks should the <br />samples detected contamination above hazardous waste criteria. The <br />tanks will be dismantled and sent to a metal recycler. The <br />underground tank and piping will be steamcleaned, sampled, and <br />disposed as scrap metal. Some pumps and piping may be reused if <br />they can be successfully decontaminated. <br />Up to approximately 10,000 gallons of washwater and 14 drums <br />of solid material could be generated should repeated <br />decontamination procedures be required. All washwater will be <br />managed as hazardous waste and transported to a treatment and <br />disposal facility. The washwater will be stored in drums and <br />stored in a temporary plastic lined contaminant area. The drums <br />will be emptied into a vacuum truck for transportation. <br />Environmental samples will be collected at or near all <br />equipment which handled hazardous waste. The containment area <br />surrounding the aboveground tanks and sumps will be cleaned and <br />sampled. If decontamination of sumps or the containment area is <br />unsuccessful or if soil contamination is detected, the Plan <br />provides for removal of up to 50 cubic yards of material for <br />disposal as hazardous waste. <br />In the event that sampling indicates that more than 50 yards <br />would require removal, the Plan identifies steps that the facility <br />must take. These steps include notification of DTSC, preparation <br />of a workplan to investigate, mitigate, or take other appropriate <br />action, and submittal of workplans, reports, specifications and <br />schedules to DTSC. DTSC must approve the documents prior to any <br />action by the facility. Future actions will require CEQA analysis <br />of the environmental impact of the proposed actions. The goal of <br />closure is to ensure natural background concentrations for soil by <br />comparison to samples from uninfluenced areas. The goal for <br />closure of the equipment is to ensure the equipment has been <br />cleaned to a level that will not pose a health risk. <br />Field activities are scheduled to last eight weeks with <br />disposal of washwater and solids (soils, disposable clothing, etc.) <br />occurring within 90 days. Scrap metal will be removed within four <br />months except one aboveground tank will not be removed until <br />mid-1996. An estimate of 20 truck trips will be required for <br />removal of the hazardous wastes generated during this closure. <br />Environmental Setting <br />The Simplot facility is located on approximately 100 acres of <br />land in an area zoned by the City of Lathrop for industrial use. <br />Surrounding properties are large industrial complexes, business <br />parks, and agricultural land. The project is in the central <br />portion of the facility called the Ag Chem area. The Ag Chem area <br />is approximately five acres and includes warehouse buildings, <br />offices, a tank farm, and a rail car loading area. The area is <br />