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s � • <br /> Soil samples were collected from the bottom center <br /> rtof each <br /> of the <br /> tank excavations on November 4, 1988, at app <br /> et <br /> below the ground surface. The samples were analyzedfortotalethylbenzene, <br /> petroleum hydrocarbons (TPH) and benzene, toluene, <br /> and xylenes (BTEX) . Analytical results for the soil sample <br /> collected from the Tank 1 excavation reportedly co (4ained TPH as <br /> gasoline (3 ,200 parts per million [ppm] ) , <br /> toluene (150 ppm) , m <br /> ethylbenzene (110 ppm) and xylenes (4.6 ppm) . <br /> ava <br /> The soil sample collected from the exc790 ppm ofbenzene (4.5 <br /> reportedly contained TPH as gasoline (790 pp ) � <br /> toluene (1. 0 ppm) , ethylbenzene (9.6 ppm) and xylenes (86 <br /> ppm) , <br /> ppm) . Petroleum odor <br /> and <br /> excavationssoil staining were no <br /> in the <br /> soils collected from the <br /> On November 17 and 18, 1988, soil was removed from both the Tank <br /> 1 and Tank 2 excavations. Analysis of four soil samples col- <br /> lected from the sidewalls and one sample collected from tholine <br /> bottom center of the Tank 1 excavation detected TPH as g In <br /> at less than 2 .2 ppm and benzene at less than 0.33 ppm. <br /> addition, one grab ground-water sample was collected from the <br /> Tank 1 excavation, and analysis results indicated the Presence of <br /> TPH as gasoline (1.4 ppm) , benzene (0.11 ppm) , toluene <br /> ppm) and xylenes (0. 18 ppm) - <br /> One soil sample was collected at approximately 11 feet below the <br /> ath the former location of Tank 2 . <br /> ground surface, directly bene <br /> Analysis of the soil sample indicated the presence of TPH as <br /> gasoline (0.7 ppm) , toluene (0.007 ppm) , ethylbenzene (0.003 ppm) <br /> and xylenes (0. 018 ppm) . Analysis of a grab ground-water sample <br /> collected from the Tank 2 excavation indicated concentrations of <br /> TPH as gasoline (4 .9 ppm) , benzene (0.016 ppm) , toluene (0. 130 <br /> ppm) , ethylbenzene (0 . 039 ppm) and xylenes (0. 110 ppm) . <br /> In January 1990, <br /> four monitoring wells (LF-6, LF-7 , LF-8 and LF- <br /> 9) were installed in Area 1 in the vicinity of the former <br /> locations of Tanks 1 and 2 (Figure 2) . Selected soil samples and <br /> shallow ground-water samples were collected <br /> and <br /> analyzed <br /> ffrom <br /> each well . Soil and ground-water quality data obtained <br /> these investigations did not indicate that soil or ground water <br /> had been affected by petroleum hydrocarbons at the locations <br /> sampled. Concentrations of petroleum hydrocarbons in ground <br /> water were reported to be slightly above or below detection <br /> limits. only trace concentrations of toluene were detected in <br /> soil samples. <br /> 2 <br />