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Fm- .q -gu :r : <br /> 1 - <br /> custody. Soil samples were analyzed for BTEX using EPA.method'020,and TPHG using EPA <br /> ' method 8015. was Analysis Performed Y pe by Sequoia Analytical Laboratory, a State certified <br /> analytical laboratory. <br /> tri <br /> t. The monitoring wells were developed using a bladder pump and bailing until well water was <br /> clear and filterck full developed.Pa y ped. Prior to sampling, depth to groundwater measurements . <br /> were collected and the well heads were surveyed. <br /> - f <br /> Subsequent to installation, development, and stabilization of electrical conductivity, pH and <br /> lr <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 /> VII <br /> EPA methcd 8020, TPHG and TPHD using modified EPA method 8015. <br /> ! 5.0 RESULT'S OF-INVESTIGATION <br /> 5.11 Soils <br /> U <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 /> nnz soil sample was coIEected from each well and boring at the soil/groundwater interface, <br /> approximately 6 feet below grade. The samples were analyzed for BTEX and TPHO by IPPA <br /> - methods 8020 and modified 8015, respectively. Additionally the sample collected fY•orn the <br /> boring near the waste of tank(SB II) was analyzed for cadmium, chromium zinc <br /> and lead by <br /> EPA methods 7421 and 6010. <br /> to <br /> t . <br /> Benzene (0.I1_PPM),,.tolucne--(0.14-ppm),-ethylbenzene-(0:047-ppm), xyienes-(0:23- m) and­ <br /> — <br /> total petroleum hydrocarbons as gasoline (2.6 ppm) were detected in the soil sample collected <br /> fro n MWI. Benzene(2.8 Ppm), toluene(2.4 ppm), ethylbenzene(7.2 ppm),xylenes(22 ppm)' <br /> ' <br /> and total petroleum hydrocarbons as gasoline (990 ppm) were detected in so-'Is collected from <br /> ! mrt <br /> a.o1rn.Lr <br /> 5 <br /> f,. <br />