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WEISS ASSOCIATES <br /> procedures to protect site workers <br /> ' 32 CURRENT GROUND WATER DEPTH <br /> ' WA will obtain the current depth to ground water data for the four municipal wells near <br /> the site We will also attempt to locate other nearby water wells, especially a well previously <br /> ' indicated on the DWG property We will research the construction characteristics of the wells, <br /> obtain historic depth to ground water information that may be available, and/or access any <br /> located wells and attempt to measure the current depth to ground water <br /> 1 <br /> ' 33 SOIL BORING AND SOIL SAMPLE COLLECTION <br /> ' WA will drill two soil borings at each vault One soil boring will be drilled immediately <br /> adjacent to each vault at a slight angle from vertical to penetrate sediments, at depth, directly <br /> below the vault The proposed locations of these borings are shown in Figures 3 through 5 Soil <br /> samples will be collected from the soil immediately below the vault and then at 5-foot intervals <br /> The soil samples will be screened with an organic vapor analyzer (OVA) immediately after the <br /> ' sampler is opened by the WA site geologist The OVA is a field instrument used to measure <br /> relative concentrations of organic compounds volatizing from each soil sample The boring will <br /> ' be advanced to 10 ft to 15 ft below any detected soil contamination as indicated by the OVA, <br /> or to a maximum depth of 45 ft bgs These samples will be retained for possible chemical <br /> ' analysis <br /> ' WA will drill the second soil boring at each vault within 10 ft of the vault in a direction <br /> estimated to be downgradient of the vault This soil boring will be used to construct a ground <br /> z <br /> water monitoring well, which is described in Section 3 4 Soil samples will be collected at 5-foot <br /> intervals to a maximum depth of approximately 20 ft below the water table The samples <br /> collected from above the water table will be retained for possible chemical analysis The <br /> samples collected from below the water table will be used for lithologic control only Our <br /> proposed locations for the monitoring wells are also shown in Figures 3 through 5 <br /> Buried utilities,above ground process equipment,or other obstacles may prevent drilling <br /> at the proposed boring and well locations If these locations cannot be accessed, we will install <br /> D \ALL\331DWG\331P1SE0 WP Page 13 <br />