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J 16 August 2011 AGE-NC Project No . 97-0301 Page 8 of 11 temperature and electrical conductivity have stabilized . However, if a well is purged dry priorto evacuating three casing volumes, a ground watersample will be collected following 80 percent recovery of ground water level within the well or within 8-hours of well evacuation . Purge water and decontamination water generated during the ground water sampling activities will be contained in DOT-approved drums which will be appropriately labeled for storage . Drums containing purge water will be stored on-site pending appropriate removal and disposal . 3 .2 .4. 3 . Sample Withdrawal Water samples will be collected from the remediation wells using a disposable polyethylene bailer or a dedicated teflon tubing used in conjunction with an inertia pump. The bailers are disposed of after one use and require no decontaminating and the teflon tubing used with the inertia pump is either dedicated to each well or changed at each sampling event, thereby minimizing cross contamination due to sampling devices. Samples will be drawn and collected in such a manner that agitation and exposure of the ground water to the atmosphere are minimal . 3 .2 .4 .4 . Sample Handling Ground water samples will be collected into laboratory supplied containers . Ground water samples will be to be analyzed forTPH-g , TPH-d , BTEX, oxygenated compounds (MTBE , TAME , ETBE , DIPE and TBA) and fuel additives ( 1 , 2-DCA and EDB) will be collected into 40-milliliter (ml ) volatile organic analysis (VOA) vials containing 0 .5-ml of hydrochloric acid as preservative and a 1 -liter amber bottle with no preservative. Following collection , the samples will be placed on ice and kept in a cooler until delivered to the laboratory for analysis . Chain of custody protocols will be used to document sample custody transfer from the field to the analytical laboratory. A chain of custody form will accompany the samples. r 3 . 3 . REMEDIATION SYSTEM PIPING NETWORK A network of one-inch diameter, schedule 40 PVC piping will be installed from the two proposed DPE wells , VW-1 through VW-3 and MW-7 in a series of trenches , approximately 24-inch wide and 18-inches deep. Additionally, two-inch diameter, schedule 40 PVC casing will be inserted over the 1 -inch piping as secondary piping containment. All PVC piping will be routed underground from each well head to the DPE liquid-ring blower, located inside the remediation system fenced enclosure (Figure 3) . A PVC ball valve will be installed at Advanced GcoEnvironmental, Inc.