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Stockton Plating <br /> mbWork Paan <br /> November <br /> r 17, 1993 <br />' Page - 3 - <br />' samples collected from the west and east sides of the excavation <br /> indicated significantly lower total lead concentrations, higher <br />' diesel concentrations in the east sample, and low levels of <br /> aromatic volatile organics . Information regarding the <br />' investigation summarized above was reported by AEMC (Underground <br /> Tank Removal and Soil Sampling, October 6, 1986 ) . <br />' On December 11, 1990, Oil Equipment Service (OES) removed a <br /> 2,000 underground fuel storage tank (TK1-90) from SPI (Figure 2) . <br />' The tank had contained leaded and unleaded gasoline. Soil <br /> samples collected from beneath the former tank indicated gasoline <br /> and gasoline constituents in the soil samples . Tetraethyl lead <br />' and ethylene dibromide were not detected in the soil samples . A <br /> report was prepared by Condor summarizing the above described <br />' work (Tank Pull Testing Results, January 2 , 1991) . <br />' In September 1991 six (6 ) soil borings were drilled around <br />' the TK1-86 and TK1-90 sites (Figure 2 ) under the supervision of <br /> Condor to evaluate the extent of soil contamination. Laboratory <br />' results indicate that TPH-gasoline and gasoline constituents <br /> (BTEX) were detected in soil boring SB3 at 20 feet and 30 feet <br />' below the ground surface. Concentrations of BTEX were also <br /> detected in SB2 at 20 feet and 45 feet, and in borings SB4, SBS, <br />' and SB6 at 45 feet. Diesel was detected at 26 mg/kg in SB1 at a <br /> • depth of 50 feet. In each boring, petroleum-stained soil was <br /> 1 <br />' �� CONDOR <br />