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c� <br /> 2) Notify the San Joaquin County Public Health Services - <br /> Environmental Health Division (PHS/EHD) 48 hours prior to work <br /> initiation. <br /> 3) Overexcavate the former tank cavity using a backhoe or <br /> excavator to a depth and area necessary to remove the <br /> contaminated soil. The area will be determined during <br /> excavation by analyzing the soil on-site using a photo- <br /> ionization detector (PTD) , but the depth may be limited by <br /> groundwater. We anticipate removing approximately 50 - 100 <br /> cubic yards of soil. <br /> 4) Contaminated soil will be stockpiled on plastic sheeting <br /> adjacent to the excavation, pending analytical results. <br /> 5) Spray the excavated soil with water (if necessary) to minimize <br /> the release of volatile organic compounds into the atmosphere. <br /> After excavation, cover the soil with plastic sheeting. <br /> 6) As excavation proceeds, monitor excavated soil for the <br /> presence of volatile organics using a photo-ionization <br /> detector (PID) . <br /> 7) Soil samples will be collected from the bottom and szdewalls <br /> of the excavation using the backhoe bucket. Discrete soil <br /> samples will be in pre-cleaned brass tubes as directed by a <br /> representative of the (PHS/EHD) . We anticipate collecting a <br /> total of(4) soil samples (three from the sidewalls and one <br /> bottom sample) . <br /> 8) Samples will be capped and sealed with tape and stored on ice <br /> pending analysis. <br /> 9) Label and log soil samples on a chain-of-custody form. <br /> 10) Analyze soil samples for total petroleum hydrocarbons (TPH as <br /> gasoline) and volatile aromatics (BTE&X) in accordance with <br /> EPA methods 8015m and 8020, respectively. <br /> 11) The excavation will remain open until analytical results are <br /> received from the laboratory. If the analytical results <br /> confirm the removal of all contaminated soil, the excavation <br /> will be backfilled with either clean fill material or pea <br /> gravel. <br /> 12) Preparation of a report summarizing the results of the above <br /> investigation. The report will be submitted to the PHS/EHD and <br /> the Central Valley Regional Water Quality Control Board <br /> (CVRWQCB) . <br /> r <br /> 3 <br />