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American Molding and Millwork <br /> February 25, 1987 <br /> i <br /> Page -4- <br /> A water sample will be collected from the site's operational water <br /> supply well. The sample will be collected in laboratory (analytical laboratory <br /> subcontractor) prepared bottles and screened for the potential contaminants <br /> presented in Table 3. <br /> North Storm Pond Sampling <br /> A water sample will be collected from the north storm pond and screened <br /> for possible contaminants as shown in Table 3. The sample will be collected <br /> with a clean glass beaker and poured into laboratory prepared sample bottles. <br /> Quality Control Samples <br /> A quality control water sample will consist of one blind duplicate <br /> sample. Sampling procedures and preservation for the quality control sample <br /> will be exactly the same as for primary samples. The field duplicate sample <br /> will be taken simultaneously with the primary sample. <br /> SOIL BORINGS <br /> Soil borings will be installed in the area adjacent to the underground. <br /> dipping solution storage tank, the buried primer wash-down tank, and the Finger <br /> Joint Building septic tank. These three borings will be drilled by our sub- <br /> contractor using a hollow stem auger, under the direct supe vision of a Dames & <br /> Moore geologist. The geologist will assist in obtaining relatively undisturbed <br /> samples, will maintain a continuous log of the boring, anc will make observa- <br /> tions of site conditions. During drilling, samples will be obtained at 5-foot <br /> intervals. We anticipate that the borings will extend no deeper than 20 feet. <br /> Air monitoring equipment will be periodically used to check the levels <br /> of potentially explosive or toxic gases in ambient breathing air, emissions in <br /> and around drilling equipment, and vapors from selected so! samples. Equipment <br /> include a Scott exploslmeter calibrated to gasoline vapors a d a H-Nu meter. <br /> Soil samples will be composited and screened for the potential con- <br /> taminants presented in Table 3. All duplicate samples will be inventoried and <br /> stored at the laboratory for future individual chemical analysis, if necessary. <br />