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i <br /> WIN <br /> October 3, 199fl <br /> [�CO <br /> ited Subsurface Environmental Investigation AGS 30055-1 <br /> Service Station No. 6020, Manteca, California <br /> z <br /> t the request of ARCO we arranged with M. J. Aronson Excavating and Hauling of Elk <br /> Grove, California, to dispose of the drill cuttings. On September 4, 1990, Aronson <br /> Excavating and Hauling of Elk Grave, California, transported and disposed of the drill <br /> cuttings at the Sacramento City Landfill in Sacramento, California. <br /> LABORATORY ANALYSES AND RESULTS <br /> roximatel 5-foot intervals from each boring and <br /> Soil samples were collected at app Y <br /> submitted to the laboratory. Soil samples were analyzed for to,:ai petroleum hydrocarbons <br /> as gasoline(TPHg)usingEnvironmental Protection Agency(EPA)preparation Method 5030 <br /> and modified EPA Method 8015 and benzene:, toluene, ethylbenzetre, and total xylene <br /> isomers(BTEX)using EPA preparation Method 5030 and EPA Method 8020. Selected soil l <br /> samples collected from boring B-4 (located nearest the leaded gasoline tank) were also <br /> analyzed for organic lead. The composite soil sample was analyzed for TFHg, BTEX, and <br /> organic lead. <br /> The laboratory analyses were performed by Applied Analytical Environmental Laboratories <br /> Certificate No. 153), and <br /> in Fremont, California (Hazardous Waste Testing Laboratory <br /> Mobile Chem Labs Inc., of Martinez, California (Hazardous Waste Testing Laboratory <br /> Certificate No. 195)• Copies of laboratory analytical reports are in Appendix B. <br /> 7 <br /> APPlied 4G"Syst"s <br />