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05 July 2005 <br /> AGE-NC Project No. 95-0137 <br /> Page 8 of 8 <br /> parameters have stabilized.However,if a well is purged dry prior to evacuating three casing-water <br /> volumes,a ground water sample will be collected following 80 percent recovery of the initial ground <br /> water volume within the well or within 1 hour of well evacuation. <br /> 4.4.3. Sample Withdrawal <br /> Water samples will be collected from the monitoring well using a disposable polyethylene bailer. <br /> These bailers are disposed of after one use and require no decontaminating, thereby minimizing <br /> cross contamination due to sampling devices.Samples will be drawn and collected in such a manner <br /> that agitation and exposure of the groundwater to the atmosphere is minimal.Sample containers will <br /> be filled using the appropriate disposable sampling attachment which allows controlled flow out of <br /> the bottom of the bailer by lifting up on the check valve. <br /> 4.4.4. Sample Handling <br /> Ground-water samples will be collected into laboratory-supplied containers.Ground-water samples <br /> for nitrates,general minerals,and ammonia will be collected into 500-m1 plastic containers without <br /> sample preservative(Table 1),and one ground-water sample for general minerals will be collected <br /> in a 1-liter amber bottle without preservative. Following collection,the samples will be placed on <br /> ice and kept in a cooler until delivered to the laboratory for analysis.Chain-of-custody protocols will <br /> be used to document sample custody transfer from the field to the analytical laboratory.A chain-of- <br /> custody form will accompany the samples. <br /> 4.5. EQUIPMENT DECONTAMINATION <br /> All sampling tools used for sample collection will be thoroughly washed with a solution of Alconox <br /> and rinsed with clean water prior to each sampling location. Hollow-stem augers will be <br /> steam-cleaned prior to each boring. <br /> Advanced GeoEnc ironmental.Inc. <br />