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1 <br /> MMAA� <br /> custody. Soil samples were analyzed for BTEX using EPA method 8020, and TPHG using EPA <br /> method 8015. Analysis was performed by Sequoia Analytical Laboratory, a State certified <br /> ' analytical laboratory. <br /> The monitoring wells were developed using a bladder pump and bailing until well water was <br /> clear and filter pack fully developed. Prior to sampling, depth to groundwater measurements <br /> were collected and the well heads were surveyed. <br /> ' Subsequent to installation, development, and stabilization of electrical conductivity, pH and <br /> temperature, groundwater samples were collected from the monitoring wells. Groundwater <br /> samples were collected, using a dedicated teflon bailer, sealed in glass containers, labeled and <br /> transported on ice in the above mentioned method. Samples were analyzed for BTEX using <br /> EPA method 8020, TPHG and TPHD using modified EPA method 8015. <br /> 5.0 RESULTS OF-INVESTIGATION <br /> 5.1 Soils <br /> The soils encountered during drilling activities were predominantly fine grained soils, <br /> interbedded lenses of elastic silts with sand to lean clay with sand. <br /> One soil sample was collected from each well and boring at the soil/groundwater interface, <br /> approximately 6 feet below grade. The samples were analyzed for BTEX and TPHG by EPA <br /> methods 8020 and modified 8015, respectively. Additionally the sample collected from the <br /> iboring near the waste oil tank (SB 11) was analyzed for cadmium, chromium, zinc and lead by <br /> ' EPA methods 7421 and 6010. <br /> ' Benzene (0 11 ppm), toluene (0.14 ppm), ethylbenzene (0 047 ppm), xylenes (0.23 ppm) and <br /> total petroleum hydrocarbons as gasoline (2 6 ppm) were detected in the soil sample collected <br /> from MW1 Benzene (2.8 ppm), toluene (2.4 ppm), ethylbenzene (7 2 ppm), xylenes (22 ppm) <br /> 4 <br /> and total petroleum hydrocarbons as gasoline (990 ppm) were detected in sods collected from <br /> F <br /> R-012792 LF 5 <br />