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R <br /> 15 March 2005 <br /> AGE-NC Project No. 04-1168 <br /> Page 8 of 9 <br /> 4.4.3. Sample Withdrawal <br /> Water samples will be collected from the monitoring well using a disposable polyethylene bailer or <br /> a dedicated teflon tubing used in conjunction with the inertia pump.The bailers are disposed of after <br /> one use and require no decontaminating and the teflon tubing used with the inertia.pump is either <br /> dedicated to each well or changed at each sampling event,thereby minimizing cross contamination <br /> due to sampling devices. Samples will be drawn and collected in such a manner that agitation and <br /> exposure of the groundwater to the atmosphere is minimal. <br /> Purge water, free-product,and decontamination water generated during the ground water sampling <br /> activities will be contained in DOT-approved drums which will be appropriately labeled for storage. <br /> Drums containing purge water will be stored on-site pending appropriate removal and disposal. <br /> 4.4.4. Sample Handling - <br /> Ground water samples will be collected into laboratory-supplied 40-m1 volatile organic analysis <br /> (VOA)vials containing 0.5 ml of hydrochloric acid as a sample preservative. Care will be taken to <br /> ensure that visible air bubbles are not present in the vials after filling and capping. Following <br /> collection, the samples will be appropriately labeled, placed on ice and kept in a cooler until <br /> delivered to a DHS-certified analytical laboratory for analysis. Chain-of custody protocols will be <br /> used to document sample custody transfer from the field to the laboratory; a chain of custody form <br /> will accompany the samples. <br /> 4.5. EQUIPMENT DECONTAMINATION <br /> All sampling tools used for sample collection will be thoroughly rinsed with clean water after being <br /> washed with a solution of Alconox.All down-hole drilling and sampling equipment will be pressure <br /> washed prior to starting each boring. <br /> 4.6. BORING ABANDONMENT <br /> Any soil borings not completed as monitoring wells will be permanently sealed to prevent vertical <br /> migration of potential contaminants. Soil borings shall be abandoned by backfilling with bentonite <br /> or cement-bentonite slurry from the total depth to surface grade. The SJCEHD will be notified for <br /> grout inspection at least 48 hours prior to grouting the borings. <br /> Advanced GeoEnvironmental,Inc. <br />