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WEISS ASSOCIATES IF <br /> the wells in the closest available appropriate location <br /> The borings will be drilled with a hollow-stem auger drilling rig Discreet soil samples <br /> ' will be collected every 5 ft,or less if required for lithologic control, from each soil boring Soil <br /> samples will be collected with a 2-inch inside diameter (ID) split-barrel sampler containing 4- <br /> inch-long cleaned brass tubes Immediately after the sampler is opened, the soil will be <br /> screened with an OVA to qualitatively assess the presence or absence of volatile organic <br /> ' compounds (VOCs) The bottom or middle tube will then be removed from the sampler, <br /> immediately trimmed, and the ends covered with aluminum foil or teflon cap liners, capped <br /> with plastic caps and sealed with tape The soil sample will be labeled and refrigerated at 4° <br /> ' C until delivery to the analytical laboratory This procedure minimizes the potential for cross- <br /> contamination, moisture loss, and loss of VOCs prior to chemical analysis The remaining soil <br /> ' will be extruded from the brass tubes and logged by the WA site geologist <br /> The top of the sample will be indicated with a "T" marked on the plastic cap Soil <br /> samples collected for chemical analyses will be labeled as follows <br /> • Company name (Weiss Associates) <br /> ' Borehole number <br /> • Sample depth <br /> ' Date <br /> ' WA project number <br /> • Instructions to lab, if appropriate, regarding where to take sample for analysis (i e <br /> middle of tube, sand at one end, etc ) <br /> 1 <br /> A chain-of-custody will be maintained through delivery to the laboratory <br /> 34 GROUND WATER MONITORING WELL INSTALLATION, DEVELOPMENT, AND <br /> SAMPLING <br /> A ground water monitoring well will be installed in each soil boring drilled in the <br /> presumed downgradicnt direction of Vaults 1, 5 and 8 Each well wilt be constructed to <br /> ' D ,ALL\331DWG\331P1SE0 WP Page 17 <br />