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r^ ' <br /> i <br /> r <br /> g. <br /> �----------, <br /> Results of Initial Investigation and Work Plan December 18, 1990 <br /> ARCO Service Station No. 2076, Lodi, California AGS 30008-2 <br /> the GSX Lokern Facility in Buttonwillow, California, for analysis to establish a profile for <br /> soil disposed at a later date. <br /> 1.&fmm1ory Analyses and Results <br /> O 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 selected for analyses were <br /> analyzed for total petroleum hydrocarbons as gasoline (TPHg) and benzene, toluene, <br /> ethylbenzene, and total xylene isomers (BTEX). TPHg analyses were conducted using <br /> Environmental Protection Agency (EPA) preparation Method 5030 and modified EPA <br /> Method 8015. BTEX analyses were conducted using EPA Method 8020. The composite <br /> ¢s soil sample was.analyzed for TPHg, BTEX, and organic lead. Organic lead was analyzed <br /> by methods approved by the California Department of Health Services. <br /> i <br /> t The laboratory analyses were performed by Applied Analytical Environmental Laboratories <br /> j' in Fremont, California (Hazardous Waste Testing Laboratory Certificate No. 121.1), and . <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 /> Results of laboratory analyses of soil samples are presented in Table 2. Results of analyses <br /> indicate that concentrations of TPHg and BTEX were belowdetection limits in samples <br /> collected from borings B-2, B-4, and B-5. TPHg was not detected in the samples collected <br /> r� <br /> from borings B-1 and B-3 drilled near the underground storage tanks. Total BTEX <br /> concentration were less than 0.15 part per million (ppm) in boring B-lin the samples <br /> collected in boring B-1 at 10 and 15 feet below grade. Benzene was.detected at 0.08 ppm <br /> - - -- in the sample collected from-boring B-3 at 25 feet bele:,-grade:toluene,ethylbenxene.and --- — - -- - <br /> ../ 7 <br />