SITE INFORMATION AND CORRESPONDENCE

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ICc'1?ricdyJer", L.ii�ZC[i Mr . Tom Terrill Reynolds and Brown 26 January 1987 Page Five until these parameters stabilized and relatively particulate- free water was obtained from the well . All water from develop- ment was discharged into steel drums designed for the storage of liquid wastes . These drums are being stored onsite pending appropriate disposal by Reynolds and Brown. After well development and purging , groundwater samples were collected using a stainless steel Kemmerer sampler attached to a teflon-coated steel cord . Sampling equipment was rinsed with deionized water prior to use to minimize the potential for sample contamination. Groundwater samples were chilled after collection and transported to Kennedy/Jenks/Chilton' s Laboratory Division for analysis. Chain of custody forms were maintained during groundwater sample collection and transport. I The well was located near open oil drums with a noticeable hydrocarbon odor. Field blanks consisting of distilled water were collected at the time of groundwater sampling to assess the potential for contamination of the samples due to vapors emanat- ing from the oil drums. LABORATORY ANALYSIS Soil and groundwater samples were analyzed for petroleum hydro- carbons (expressed as gasoline and diesel fuel ) and volatile gasoline constituents (benzene, toluene, xylene, and ethylben- zene) at Ken reedy/Jenks/Chilton' s Laboratory Division. Analysis of samples for petroleum hydrocarbons was performed using gas chromatogrpahy with a flame ionization detector (GC/ FID) . Analysis for petroleum hydrocarbons was performed to quantify the amount of product that may have been retained in undisturbed soil or groundwater in the event of tank leakage. Analysis of samples for the typical volatile gasoline constitu- ents benzene , toluene , xylene, and ethylbenzene was performed using gas chromatography according to EPA ethod 8020 for soil and EPA Method 602 for water. Analysis for these volatile gaso- line constituents was performed because they are considered to have potentially ha �, ful effects on human health. Determination of the concentrations of volatile gasoline constituents in soil and groundwater is often required by regulatory agencies in assessing the reed foc remediation of underground fuel tank leaks.