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• <br /> 15) Surge and purge the wells using a bailer or submersible pump <br /> and measure water temperature, pH, and conductivity at one- <br /> gallon intervals. <br /> 16) Contain purged water .in 55 gallon DOT drums and store on--site <br /> pending analytical results. <br /> 17) After water parameters have stabilized, collect a water sample <br /> from each well in 1-liter amber bottles and EPA-approved VOA <br /> vials capped with teflon-faced silicone septum. <br /> 18) Label and log water samples on a chain-of-custody form. <br /> 19) Store samples under ice pending delivery to a state-certified <br /> laboratory. <br /> 20) Analyze water and selected soil samples for Total Petroleum <br /> hydrocarbons (TPH-gasoline & TPH-diesel) in accordance with <br /> EPA method 8015m and for aromatic hydrocarbons (BTE&X) in <br /> accordance with EPA methods 602 and 8020. <br /> 21) Overexcavate the remaining contaminated soil at the location <br /> of the former underground storage tanks 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 (PID) . Approximately 200 yards of soil is <br /> estimated to be removed. <br /> 22) Stockpile the contaminated soil on plastic sheeting. <br /> 23) 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 /> 24) As excavation proceeds, monitor excavated soil for the <br /> presence of volatile organics using a photo--ionization <br /> detector (PID) . <br /> 25) Scrape walls and floor of excavation with backhoe bucket and <br /> collect discrete soil samples in pre-cleaned brass tubes as <br /> directed by a representative of the San Joaquin County Public <br /> Health Services - Environmental Health Division (PHS/EHD) . A <br /> total of five soil samples is anticipated to be collected. <br /> 26) Cap samples, seal with tape and store on ice pending analysis. <br /> 27) Label and log soil samples on a chain-of-custody form. Samples <br /> will be transmitted to a state certified laboratory. <br /> 28) Analyze soil samples for total petroleum hydrocarbons (TPH as <br /> gasoline and diesel, EPA 8015m) and volatile aromatics (BTE&X, <br /> 4 <br />