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27 December 2004 <br /> AGE-NC Project No. 04-1239 <br /> ' Page 8 of 8 <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 inertiapump.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 arc minimal. <br /> ' 4.4.4. Sample Handling <br /> ' Ground water samples will be collected into laboratory supplied containers. Ground water samples <br /> to be analyzed for TPH-g, BTEX and fuel additives will be collected into 40-m1 volatile organic <br /> analysis(VOA)vials containing 0.5-m1 of hydrochloric acid as preservative. Following collection, <br /> the samples will be placed on ice and kept in a cooler until delivered to the laboratory for analysis. <br /> Chain-of-custody protocols will be used to document sample custody transfer from the field to the <br /> analytical laboratory. A chain-of-custody form will 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 lackingpublic 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 /> ' Olmsted, F.H., and G.H. Davis, 1961, Geologic Features and Groundwater Storage Capacity of <br /> the Sacramento Valley, California, U.S. Geological Survey Water Supply Paper 1497, <br /> ' 241p. <br /> tAdvanced Geo6nvironmental,Inc. <br />