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Ms Mary Meays Page 2 <br /> January 14, 1993 <br /> ,D in 55-gallon drums and stored on site Latex type gloves were worn while <br /> handling sampling equipment and sample containers Bailer cord was <br /> replaced before sampling at each well location <br /> Upon completion of sampling activities at the end of the day, ERM obtained a <br /> second set of water level measurements Again, all of the measurements <br /> were obtained within one hour The water levels are shown in Table 1 <br /> Laboratory Analyte <br /> Water samples collected at the site were sent to Sequoia Analytical, Inc , <br /> Concord, California under chain of custody At the laboratory, the samples <br /> were analyzed according to the following test procedures <br /> • Total Petroleum Hydrocarbons as Gasoline (TPH-G) -- <br /> EPA Method 8015-M, <br /> • Total Petroleum Hydrocarbons as Diesel (TPH-D) <br /> (Former Tank Site #2 Only) -- EPA Method 8015-M, and <br /> • Benzene, Toluene, Ethylbenzenes and Xylenes (BTE&X) -- EPA Method <br /> 8020 <br /> QA/QC procedures consisted of including a travel blank Analyses of the <br /> travel blank indicated that all constituents analyzed for were below detection <br /> limits <br /> Field blanks were collected by transferring de-ionized water that was <br /> purchased from a store directly into a volatile organic analysis (VOA) <br /> container At the laboratory, standard internal QA/QC procedures were <br /> followed <br /> Findings <br /> The findings from the laboratory testing are summarized in Tables 2 and 3 <br /> Laboratory reports and chain of custody forms are attached The following is a <br /> discussion of the findings for Former Tank Sites #1 and #2 <br /> Former Tank Site #1 <br /> Potentlometric surface contours are depicted in Figures 2 and 3 The contours <br /> shown for the measurements made in the morning indicate a south-oriented <br />