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R* <br /> i <br /> -. IN- <br /> product lines will be analyzed for BTEX, and TPI4G by EPA methods 8020/8015 respectively. <br /> The sample collected near tank pit 2 (the waste oil tank) will be analyzed for lead, cadmium, <br /> zinc, and chromium by EPA methods 7420 and 6010 respectively. <br /> GROUNDWATER <br /> i., <br /> To define the Iateral extent of groundwater impact WaterWork proposes to install three soil <br /> r borings, completing them as monitoring wells. One well will be installed downgradient of the <br /> tank pit and line areas,one will be installed near the product lines,and one well will be installed <br /> r up-gradient of the tank pit and product lines. The monitoring wells will be completed a <br /> �.� maximum of.fifteen feet below first water,approximately 25 feet below grade. Drilling will be <br /> conducted under the direct supervision of WaterWork, by a licensed C57 drilling contractor <br /> using a hollow-stem auger rig. The wells will be constructed of 4 inch F430 PVC casing and <br /> screen and completed as shown on Figure 4. <br /> Drill cuttings will be logged continuously for characterization of soil type using the Unified Soil <br /> Classification System. Descriptions of soils encountered and monitoring well construction detail <br /> will be recorded on boring/well logs and included in the Problem Assessment Report. Soil <br /> samples will be collected from each boring at five foot depth intervals. The samples will be <br /> collected in brass sleeves using a modified California split spoon sampler. The samples will be <br /> `" sealed with teflon tape, a plastic cap, tape and put into a plastic bag. The samples will then be <br /> placed or, ice in an air tight Gooier and transportation to a State certified laboratory under strict <br /> chain-of-custody, Soils encountered will be monitored by placing a small amount of <br /> representative soil in a sealed container, then measuring the concentration of volatiles collected <br /> in the head space of the container with a photoionization detector(PID)calibrated to the benzene <br /> molecule. The values obtained at each measurement point will be recorded on th-_boring/well <br /> logs. <br /> fr--- --- — - ---One-soil-sample-.will-be selected for analysis during tfie drilling of-each monitoring well at the------�- — ----- <br /> %` soil/groundwater interface. The samples will be collected in the manner mentioned above. <br /> . MM,wP S <br />