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v � 1 <br /> • 15 January 1998 <br /> AGE-NC Project No 96-0254 <br /> Page 15 of 16 <br /> 4 3 3 Sample Withdrawal <br /> Water samples will be collected from the monitonng wells using disposable polyethylene bailer <br /> These bailers are disposed of after one use and require no decontaminating,thereby minimizing cross <br /> contamination due to sampling devices Samples will be drawn and collected in such a manner that <br /> agitation and exposure of the groundwater to the atmosphere is minimal Sample containers will be <br /> filled using the appropriate disposable sampling attachment which allows controlled flow out of the <br /> bottom of the bailer by lifting up on the check valve <br /> 4 3 4 Sample Handling <br /> Ground water samples will be collected into laboratory supplied containers Ground water samples <br /> to be analyzed for BTEX,TPH-g,halogenated volatile organic compounds, and oxygenates analyses <br /> will be collected into 40-m1 VOA vials containing 0 5-ml of hydrochloric acid as preservative <br /> Samples to be analyzed for TPH-d analysis will be collected into 1-liter amber glass containers <br /> lacking the preservative Following collection, the samples will be placed on ice and kept in a cooler <br /> until delivered to the 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 4 EQUIPMENT DECONTAMINATION <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 <br /> Decontamination water generated during the ground water sampling activities will be contained in <br /> DOT-approved drums which will be appropriately labeled for storage Drums containing <br /> decontamination water will be stored ori-site pending appropriate removal and disposal <br /> Advanced GeoEnviron mental,Inc <br />