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Elm <br /> Limited Environmental investigation July 16, 1990 <br /> ARCO Service Station No. 6100, Tracy, California AGS 30041-1 <br /> The borings were backfilled to.the ground surface with a neat cement slurry.. Cuttings. <br /> generated during drilling were placed on plastic, covered with plastic, and left at the site. <br /> i <br /> LABORATORY ANALYSES 2 <br /> } <br /> W <br /> Soil samples collected at 10-foot intervals, and the bottom two samples at 5-foot intervals <br /> from each boring were submitted to the laboratory. Soil samples were analyzed for total <br /> petroleum hydrocarbons as gasoline(TPHg)using Environmental Protection Agency(EPA) <br /> preparation Method 5030 and modified EPA Method 8015 and benzene, toluene, <br /> ;y ethylbenzene, and total xylene isomers (BTEX) using EPA preparation Method 5030 and <br /> EPA Method 8020. Soil samples collected.nearest theleaded gasoline tanks'(borings B-1 <br /> and B-3)'were:also analyzed for organic lead: t <br /> The laboratory analyses were performed by Applied Analytical Environmental Laboratories <br /> in Fremont, California (Hazardous Waste Testing Laboratory Certificate No. 153), and i <br /> Anametrix Inc.in San Jose,California(Hazardous Waste Testing Laboratory Certificate No. <br /> 151). Copies of Iaboratory analytical reports are in Appendix B. <br /> i <br /> i <br /> 7 <br /> �4pw/ied �°eoSystems <br />