Laserfiche WebLink
Woodward-Clyde <br /> Corksultants <br /> The analytical results for the soil samples collected underneath the gasoline tanks are <br /> presented in Table 1 <br /> One soil sample was collected underneath the waste oil tank and analyzed for BTEX, total <br /> lead, chlorinated hydrocarbons, and total extractable petroleum hydrocarbon (TEPH) The <br /> 4 <br />'+ results were below the detection for benzene (5 ppb), toluene, ethylbenzene, and total <br /> xylenes (10 ppb), total lead (4 ppm), chlorinated hydrocarbons (5 ppm), and TEPH (10 ppm) <br /> limits of the analyses <br /> In August 1991 WCC conducted a field investigation in two phases a subsurface soil <br /> investigation followed by a groundwater investigation During the soil investigation, three <br /> soil borings were advanced around the gasoline tank excavation to a depth of 90 feet below <br /> ground surface Soil samples were collected at five foot intervals and three samples from <br /> each boring were submitted to the laboratory for analysis based on visual observation of the <br /> soil conditions and the measured volatile organic compound concentration of the sample <br /> The submitted samples were analyzed for TPH gasoline by EPA method 8015, BTEX by <br /> EPA method 802015030, and total lead concentration by EPA method 7241 The analytical <br /> results for soil samples collected from the bonngs is presented in Table 1 Monitoring wells <br /> were installed in each of the three bonngs. Groundwater samples collected from these wells <br /> were analyzed for total fuel petroleum hydrocarbon (TFH) gasoline by EPA method 5030, <br /> BTEX by EPA method 8020, and fecal coliform by Standard Method 9921 The analytical <br /> results for groundwater samples collected from the wells is presented in Table 2 <br /> Elevated levels of TPH (gasoline) were not encountered in the analyzed soil samples <br /> collected during the subsurface soil investigation The analytical results for these samples <br /> were below the detection limit of the analysis (0 5 mg/kg) No evidence of TPH (gasoline) <br /> soil contamination was detected in the soil samples collected during this investigation in the <br /> area adjacent to the gasoline tank excavation Elevated levels of toluene and ethyl benzene <br /> were not encountered in the soil samples analyzed The analytical results for these samples <br /> were below the detection limit of the analysis (5 µg/kg for both toluene and ethyl benzene) <br /> Detectable levels of benzene were encountered in four of the nine samples analyzed. No <br /> elevated level of BTEX was encountered in the soil samples collected dust above the <br /> . groundwater interface <br /> / 91M38131MAIORMART QRrr o2-20.92 1-4 <br />