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Soo <br /> LKennedx/Jen !9,CtdKon <br /> Mr. Tom Terrill <br /> L Reynolds and Brown <br /> 26 January 1987 <br /> Page Five <br /> until these parameters stabilized and relatively particulate- <br /> free water was obtained from the well. All water from develop- <br /> ment was discharged into steel drums designed for the storage of <br /> liquid wastes. es 'n stored site- ending <br /> Lappropriate di Reynolds and Brown. <br /> After well development and purg3nq, groundwater samples were <br /> collected using a stainless steel Kemmerer sampler attached to a <br /> teflon-coated steel cord. Sampling equipment was rinsed with <br /> deionized water prior to use to minimize the potential for <br /> sample contamination. Groundwater samples were chilled after <br /> L collection and transported to Kennedy/Jenks/Chilton's Laboratory <br /> Division for analysis. Chain of custody forms were maintained <br /> during groundwater sample collection and transport. <br /> L The well was located near open oil drums with a noticeable <br /> hydrocarbon odor. Field blanks consisting of distilled water <br /> were collected at the time of groundwater sampling to assess the <br /> L potential for contamination of the samples due to vapors emanat- <br /> ing from the oil drums. <br /> f LABORATORY ANALYSIS <br /> L Soil and groundwater samples were analyzed for petroleum hydro- <br /> carbons (expressed as gasoline and diesel fuel) and volatile <br /> gasoline constituents (benzene, toluene, xylene, and ethylben- <br /> zene) at Kennedy/Jenks/Chilton' s Laboratory Division. <br /> L Analysis of samples for petroleum hydrocarbons was performed <br /> using gas chromatogrpahy with a flame ionization detector (GC/ <br /> FID) . Analysis for petroleum hydrocarbons was performed to <br /> quantify the amount of product that may have been retained in <br /> undisturbed soil or groundwater in the event of tank leakage. <br /> Analysis of samples for the typical volatile gasoline constitu- <br /> ents benzene, toluene, xylene, and ethylbenzene was performed <br /> using gas chromatography according to EPA Method 8020 for soil <br /> and EPA Method 602 for water. Analysis for these volatile gaso- <br /> line constituents was performed because they are considered to <br /> L have potentially harmful effects on human health. Determination <br /> of the concentrations of volatile gasoline constituents in soil <br /> and groundwater is often required by regulatory agencies in <br /> assessing the need for remediation of underground fuel tank <br /> leaks. <br /> L <br />