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� s <br />• 28 January 2005 <br /> AGE-NC Project No 02-0964 <br /> Page 6 of 7 <br /> 3 4 1 Static Water Level Measurements <br /> Before purging and sampling during ground water monitoring events, static water level will be <br /> measured using an electric water level indicator Water level data will be recorded to the nearest 0 01 <br /> foot from a reference point marked at the top of the PVC well casing Before and after each use,the <br /> electric water level indicator will be washed in an Alconox solution and rinsed with water <br /> 3 4 2 Well Evacuation <br /> Subsequent to measurement of depth to water and prior to sampling,the well will be purged using <br /> a submersible pump to ensure that the ground water sample is representative of the formation,rather <br /> than water standing in the well casing The well will be purged until 1) a minimum of three casing <br /> volumes is removed from the well, and/or 2) the field-measured ground water parameters pH, <br /> temperature and electrical conductivity have stabilized However, if a well is purged dry prior to <br /> evacuating three casing volumes, a ground water sample will be collected following 80 percent <br /> recovery of the initial ground water level within the well or within 8-hours of well evacuation <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 Drums containing purge water will be stored on-site pending <br /> appropriate removal and disposal <br /> 3 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 are minimal <br /> 3 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-ml of hydrochloric acid as preservative Following collection, <br /> 40 the samples will be placed on ice and kept in a cooler until delivered to the laboratory for analysis <br /> Advanced GeoEnvironniental,Inc <br />