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1013 Shaw Road,Stockton,CA 2 August 30, 190 <br /> The first Canonie Environmental soil test report (dated July 21, 1986) presents the <br /> results obtained from two soil samples taken from beneath the underground tanks upon their <br /> removal. These results indicate a total lead content of 22 parts per million (ppm) in soil below <br /> the 10,000 gallon tank. Benzene,toluene,total xylenes,and ethyl benzene (BT%&E) constituents <br /> analyzed from soil samples collected beneath both tanks indicated non-detectable <br /> concentrations at the minimum detectable limits. Total volatile hydrocarbons of 2.0 and 5.0 <br /> ppm were detected from soil samples collected below the 10,000 and 8,000 gallon tanks, <br /> respectively. <br /> Apparently, based on the test results cited above, Mr. Harlin Knoll of the San Joaquin <br /> County Public Health Services, Environmental Health Division filed an Underground Storage <br /> Tank Unauthorized Release/Contamination Site Report on March 18, 1988. Based on this report, <br /> Mr. Knoll requested additional testing at the location of the former underground tanks in <br /> August, 1990,prior to final closure of the underground tanks related to anticipated transfer of <br /> ownership of the facility. <br /> In August, 1990 the existing eight inch concrete pavement layer was removed from <br /> above the location of the former underground tanks and soil was excavated to a depth of <br /> eighteen feet below ground surface (bgs). Two soil samples were collected under each of the <br /> former tanks by Canonie Environmental on August 21, 1990 under the observation of Mr. <br /> Knoll. The two soil samples were obtained from a depth of eighteen and nineteen feet (bgs). <br /> The results of the laboratory tests performed by Canonie Environmental were documented in a <br /> report dated August 27,19N. The results obtained were; <br /> Test Performed Sample Y1 (18 Ft.) Sample El (19 Ft.) <br /> Total Lead(EPA 6010) ND 6.4 ppm. <br /> Total Extractable 15 ppm ND <br /> H drocarbons-(DOHS LUFT) <br /> BT%&E(EPA 8020) ND ND <br /> Total Volatile Hydrocarbons ND ND <br /> (DOHS LUFT) <br /> Soluble Lead (Cal WET) ND ND <br /> s <br />