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Mr. Donald Sershon 2 February 4, 1987 <br /> wrapped with foil , capped, and refrigerated. After the boring was <br /> completed, a two-inch diameter PVC well with five feet of 0.02-inch slotted <br /> screen was installed (Figure 2) . No. 3 Lone Star sand was used as a sand <br /> pack from the bottom of the boring to three feet above the screen . A two- <br /> and-one-half-foot bentonite seal was placed above the sand and a cement <br /> grout was placed above the bentonite to complete the well . <br /> Well Development and Sampling <br /> The well was purged for three and one-half hours (approximately 35-40 <br /> gallons were extracted) before any water samples were taken . When the <br /> water appeared to be clean , the pH was read and seven samples were taken , <br /> six for volatile analyses and one for conductivity. These samples were <br /> sealed, refrigerated, and transported directly to the Canonie laboratory <br /> for analysis by the EPA 624 method. The results are included in Table 1 . <br /> Summary of Findings <br /> The waste disposed of into the sump has not contaminated the ground water <br /> with volatiles. Water samples were tested for volatiles and none were <br /> detected. Also, a pH of 7.05 was read in the field. Due to these find- <br /> ings , it was not necessary to test the soil samples . <br /> Respectfully submitted, _ <br /> 4 �l� <br /> Theresa Santangelo <br /> Geologist < <br /> Roman S. Popiel k , P.G. <br /> Project Supervisor <br /> TS/RSP/klg <br /> Enclosures <br /> cc : San Joaquin Local County District <br /> CanoweEnvironmental <br />