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The excavated area will be temporarily fenced for safety <br /> reasons and to minimize potential exposure to personnel. <br /> i. Once any obviously stained soils are removed, a sample of <br /> the native soil from the fill or pump end of the pit <br /> bottom for each tank location. These samples will be <br /> analyzed for the compounds listed on Table 1. <br /> j . A soil sample will be collected every 20 linear feet in <br /> the trenches where piping was removed. <br /> k. If water is present in the pit, the water will be sampled <br /> and analyzed for the same parameters as the soil <br /> samples. <br /> 1. The analytical results of the soil and/or water samples <br /> will determine the next step of closure. If the analyti- <br /> cal results indicate no contamination, the excavated pit <br /> will be backfilled and the area resurfaced upon receipt <br /> of approval to do so from the San Joaquin County Public <br /> Health Services, Environmental Health Division (PHS/EHD) . <br /> If contamination is indicated, then further investigation <br /> will be implemented and appropriate steps undertaken in <br /> accordance with the PHS/EHD. The determination as to <br /> whether contamination exists will be left up to the <br /> PHS/EHD. <br /> 5. 0 CLOSURE SCHEDULE <br /> Notification to PHS/EHD of intent to close: 20 days <br /> Expected date of initiating closure and to cease receiving waste: <br /> Day 0 <br /> Final date for removal of tank inventory and disposal: Day 50 <br /> Final date for facility decontamination: Day 90 <br /> Estimated date for closure completion and certification: Day 120 <br /> 6. 0 WASTES GENERATED FROM CLOSURE <br /> Wastewater generated from decontamination of the tank and equipment <br /> will be sampled for the same constituents as those listed in Table <br /> 1. If the analytical results indicate the wastewater is within the <br /> criteria established by the PHS/EHD, then the wastewater will be <br /> discharged to the SJDC sanitary sewer system (only upon receipt of <br /> approval to do so from the PHS/EHD) . If the waste concentrations <br /> are above the allowable discharge levels, then these wastewaters <br /> will be transported to an appropriate treatment/disposal facility. <br /> PHS/EHD will be notified prior to the start of the closure <br /> activities. Approximately 300 gallons of wastewater are expected <br /> to be generated and collected. Solid wastes generated from the <br /> excavation will be either drummed or loaded onto bulk transport <br />