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i <br /> B-1 and B-2. The highest TPH levels (111 and 190 parts per million) <br /> encountered during that investigation were found in the standing water <br /> sampled from the borings. Much lower TPH concentrations (1 to 43 ppm) were <br /> detected in soil samples collected from boring B-1 a few feet above the <br /> encountered water table. No TPH were detected in soil samples collected <br /> from boring B-2. <br /> BTEX were detected (B o 4.8 ppm, T — 7.4 ppm, E — 7.4 ppm, X — 12 ppm) in a <br /> single soil sample, collected at a depth of 9.5 feet in boring B-1 (north of <br /> the tank) . BTEX were also detected in water samples collected from standing <br /> water in borings B-1 and B-2 (B = 31 and 3.8 ppm, T — 49 and 23 ppm, E — 21 <br /> and 6.1 ppm, X a 22 and 12 ppm, respectively) . <br /> Total lead was found in soil samples at concentrations ranging from 7 to 11 <br /> ppm. One water sample, collected from boring B-1, showed detectable levels <br /> of total lead (6.6 ppm) . <br /> Results also showed nondetectable levels of ethylene dibromide and <br /> 1,2-dichloroethane in all soil and water samples. <br /> Laboratory data sheets for these analyses and soil boring logs for the 1986 <br /> investigation are included in Appendix A. Additional details of the <br /> preliminary investigation can be found in PG&E's Department of Engineering <br /> Research Report No, 402.331-87 .4. <br /> On October 22, 1987, the tank was removed by D.H. Materials, and the <br /> excavation was backfilled with imported soil. Upon removal, no holes were <br /> observed in the tank, although some corrosion was evident on the tank walls. <br /> Petroleum hydrocarbon odor was detected in the excavated material surrounding <br /> the tank. <br /> 3286a/BAV100 6 <br />