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April 7, 1992 <br /> • ARCO Service Station No 760, Lodi, California <br /> chromium III, chromium VI, lead, nickel, and zinc) The sample was also analyzed for <br /> soluble lead because the total concentration of lead exceeded the STLC <br /> Laboratory Results <br /> Results of analyses of drill cuttings (sample S-0614-IABCD) indicated hydrocarbons were <br /> not detected The drill cuttings were disposed of with the stockpiled soil from the tank <br /> removal <br /> Results of analyses of the composite soil samples from the tank cavities indicated residual <br /> hydrocarbons were not detected in nine out of eleven composite soil samples (Table 10) <br /> Composite soil sample 5-0619-3(A-D) (soil pile 3) contained 2 6 ppm TPHg and 0 020 ppm <br />. total xylene isomers Composite soil sample 5-0619-9(A-D) (soil pile 9) contained 0.089 <br /> ppm total xylene isomers BTEX concentrations were below detection limits Results of <br /> the bioassay analysis indicated the soil was nonhazardous <br />' Authorization To Backfill Former Gasoline Tank Cavity <br /> At the request of the SJCPHS-EHD, ARCO submitted a letter to the SJCPHS-EHD <br /> requesting authorization to leave soil piles 2, 3, 7, and 8 in place above the geofabric and <br /> to complete backfilling the former tank cavity with soil from piles 2,3, and 4 Authorization <br /> was obtained from the SJCPHS-EHD verbally on July 17, 1991 <br /> 1 <br /> 1 � <br /> 38048-s 15 <br /> i <br />