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TANK CLOSURE REPORT—BEACON STATION #494 -3- <br /> 2185 East Fremont Street, Stockton, CA <br /> AMV Project No. 19005.04 <br /> 3.0 PRODUCT PIPING TRENCH SOIL SAMPLING <br /> On March 8, 1993, four soil samples were collected from locations beneath the former product <br /> distribution lines and the fuel dispensers. Locations of the former product distribution lines and <br /> the fuel dispensers are illustrated on Figure 3 along with collection locations of soil samples P1 <br /> through P4. Soil sample locations were discussed with Ms. Carol Oz of San Joaquin County. <br /> The soil samples were collected by driving an impact sampler fitted with a 2-inch-diameter brass <br /> tube into the soil retrieved with a backhoe bucket from approximately 4.5 feet below grade. Soil <br /> samples were submitted for analysis of BTEX, TPHg, EDB, and total lead. <br /> None of the four soil samples collected from beneath the product piping lines contained <br /> measurable amounts of TPHg or EDB. The soil sample with the highest total lead concentration <br /> (P2) contained 8.2 mg/kg. Soil sample analytical results are compiled in Table 2, and copies <br /> of certified laboratory reports are contained in Appendix D. <br /> TABLE 2 <br /> PRODUCT DISTRIBUTION LINE SOIL SAMPLE ANALYTICAL RESULTSa <br /> MARCH 6, 1993 <br /> Concentrations in milligrams per kilogram (mg/kg) <br /> SampleTotal" <br /> LD. BenzeneToluene Ethylbenzene Xylenes ' TP& EDBb Lead:. <br /> P1 <0.0050 0.0051 <0.0050 0.014 <0.50 <0.010 8.2 <br /> P2 <0.0050 <0.0050 <0.0050 <0.0050 <0.50 <0.010 8.2 <br /> P3 <0.0050 <0.0050 <0.0050 <0.0050 <0.50 <0.010 7.1 <br /> P4 <0.0050 <0.0050 <0.0050 <0.0050 <0.50 <0.010 7.7 <br /> 'TPH = total petroleum hydrocarbons as gasoline. <br /> bEDB = ethylene dibromide. <br />