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Ms. Margaret Lagorio <br /> San Joaquin County <br /> July 24, 1995 <br /> Page 2 <br /> groundwater samples will be analyzed using EPA methodology. Volatile organic <br /> compounds (VOCs) will be analyzed using EPA Method 8240, Title 22 metals using <br /> EPA 6010/7000 series, organochlorine pesticides and PCBs using EPA Method 8080, <br /> and chlorinated herbicides using EPA Method 8150. Total petroleum hydrocarbons <br /> (TPH) with characterization of peaks will be analyzed using EPA Method 8015, <br /> modified to identify and quantify the sample against diesel, JP fuel, kerosene, motor <br /> oil, and paint thinner standards. <br /> Drill cuttings and purge water will be placed in containers and will remain on-site until <br /> receipt of analytical results and determination of appropriate disposal. Soil and water <br /> disposal will be the responsibility of FMC Corporation. Augered soil borings will be <br /> backfilled to ground surface with a cement/bentonite grout through a tremie pipe. Soil <br /> probe borings will be backfilled with bentonite. <br /> FR Manufacturing, Stockton <br /> The investigation areas for this site will include the former underground storage tank <br /> (UST) location, the paint shop compressor area, the paint shop discharge area, the <br /> sand pile area adjacent to the Roadway Express fuel island, the wash area and <br /> northern perimeter, the unpaved storage area, a four-inch diameter pipe in the <br /> southern parking area, the reported dry well, the inactive (capped) well, two areas of <br /> broken asphalt, and the two on-site active wells. Proposed sample locations are <br /> shown on Figure 1 . Proposed number of sample locations, depths, and analyses are <br /> shown on Table 1 . <br /> UST <br /> A 4,000-gallon steel UST containing gasoline was reportedly removed from the site <br /> under permit in 1989 or 1990; however, the company conducting the removal went <br /> out of business and did not complete closure requirements. FR Manufacturing <br /> personnel report that preliminary results indicated that the UST had not leaked. <br /> Four soil gas samples will be collected from immediately beneath the former tank <br /> location, piping, and dispenser areas and will be field screened with a PID. Four soil <br /> samples will be collected in locations adjacent to the soil gas samples and will be <br /> analyzed for TPH-G, organic lead, and BTEX. If PID readings or visual evidence <br /> indicate the presence of volatile compounds or gasoline, additional soil gas and/or soil <br /> samples will be collected and analyzed to estimate volume of impacted material. <br /> II11IHYDRO-SEARCH, nG A Tetra Tech Company <br />