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11 August 2004 = <br /> AGE-NC Project No. 04-1180 <br /> Page 7 of 8 <br /> Purge water,free-product, and decontamination water generated during the ground water sampling <br /> activities will be contained in Department of Transportation(DOT)-approved.drums which will be. <br /> appropriately labeled for storage. <br /> 4.4.3. Sample Withdrawal <br /> Water samples will be collected from the monitoring well using disposable polyethylene bailer or <br /> 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 /> from sampling devices. Samples will be drawn and"collected in such a mariner that agitation and <br /> exposure of the ground water to the atmosphere is minimal. <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-m1 of hydrochloric acid as preservative.Care will betaken to ensure that <br /> visible air bubbles are not present in the vials after filling and capping. Following collection, the <br /> samples will'be appropriately labeled,placed on ice and kept in a cooler until delivered to a DHS- <br /> certified analytical laboratory for analysis. Chain of custody protocols will be used to document <br /> sample custody transfer from the field to the analytical laboratory. A chain of custody form will <br /> accompany the samples. <br /> 4.5. EQUIPMENT DECONTAMINATION/WASTE MANAGEMENT <br /> All sampling tools used for sample collection, except for disposable bailers,, will-be thoroughly <br /> rinsed with clean water after being washed with a solution of Alconox. All down-hole drilling <br /> equipment will be pressure washed prior to starting each boring. Cuttings generated during drilling <br /> and rinseate generated during drilling and ground water sampling activities will be containerized in <br /> properly labeled DOT-approved 55-gallon drums,and stored on-site in an area lacking public access. <br /> Disposal alternatives will be evaluated based on results of soil and water analysis. <br /> 5.0 REFERENCES <br /> California Division of Mines and Geology, 1981. Regional Geologic Map Series, Sacramento <br /> Quadrangle. <br /> Advanced GeoEnvironmental,Inc. <br />