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n <br /> r <br /> r <br /> Es4 <br /> Stockton Plating Inc. <br /> F October 10, 1991 - <br /> _ 3 <br /> Page -3- - <br /> :. reported the excavated soils had the characteristics of <br /> rubble/fill material. AEMC collected two soil samples (#06213A <br /> and #062135) from the west and east sides of the excavation, <br /> E� respectively. Laboratory analyses indicated: <br /> (A) significantly lower total lead concentrations (37,9 <br /> (* <br /> mg/kg and 21.5 mg/kg) . <br /> (B) No detectable hydrocarbons in the west sample #06213A <br /> (<10 mg/kg). <br /> (C) hydrocarbons in the diesel range detected in the east <br /> sample #66213B (940 mg/kg) . <br /> (D) very low levels of aromatic volatile organics detected. i <br /> ARMC concluded there was no evidence to suggest the contents ' <br /> of the excavated gasoline tank were the source of the f <br /> contamination and recommended that SPI request county <br /> 4 <br /> , . authorization to backfill, the excavation (Underground Tank <br /> ' Removal and Soil sampling, by AEMC, October 6, 1966) . The San <br /> Joaquin County Environmental Haalth Department placed the <br /> investigation on hold until further notice. <br /> r, On December 11, 1990 Oil Equipment qu pment Service, removed one <br /> 2,000-gallon underground fuel storage tank (TK1--90) from SII <br /> s <br /> (Figure 2) . The tank had contained leaded and unleaded gasoline. <br /> - -- Jamas-Waco of Connor-Earth Technologies, Inc. (Condor), was on !' <br /> 4: site to acllect .soil samples following the removal of the to <br /> CONDOR <br />