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E <br /> Limited Environmental Investigation July 16, 1990 <br /> ARCO Service Station No. 6100,Tracy, California AGS 30041-1 <br /> WThe 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 /> ES a <br /> LABORATORY ANALYSES <br /> � a <br /> M <br /> lrrl <br /> E 4 <br /> + -foot intervals, and the bottom two samples at 5-foot intervals <br /> Soil samples collected at 10 <br /> i <br /> from each boring were submitted to the laboratory. Soil samples were analyzed for total <br /> r� <br /> petroleum hydrocarbons as gasoline(TPHg)using Environmental Protection Agency(EFA) , <br /> preparation Method 5030 and modified EPA Method 8015 and benzene, #oluene, r <br /> t eth ylbenzene, and total xylene isomers (BTEX) using EPA preparation Method 5030 and <br /> ai <br /> EPA Method 8020. Soil samples collected nearest the leaded gasoline tanks (borings B-1 <br /> and B-3)were also analyzed for organic lead. <br /> L <br /> t; The laboratory analyses were performed by Applied Analytical Environmental Laboratories <br /> w_ in Fremont, California (Hazardous Waste Testing Laboratory Certificate No. 153), and <br /> Anametrix Inc.in San Jose,California(Hazardous Waste Testing Laboratory Certificate No <br /> 15i). Copies of laboratory analytical reports are in Appendix B. <br /> _ 5 <br /> ii <br /> i <br /> ,4 olled Ge0S�rstem� <br />