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15 November 2000 AGE-NC Project No 99-0570 ' Page 3 of 6 • Oxygenated compounds di-isopropyl ether(DIPE),ethyl tertiary-butyl ether(ETBE), methyl tertiary-butyl ether (MTBE), tertiary-amyl methyl ether (TAME), tertiary butanol (TBA), ethyldibromide (EDB) and 1,2-dichloroethane (1,2-DCA) in accordance with EPA Method I8260-Modified, respectively r24 MONITORING WELL DEVELOPMENT AND SURVEYING On 02 October 2000, a Solinst water level meter was used to measure the depth to ground water in monitoring wells MW 1 through MW5 After depth to ground water measurements, a minimum of 30 gallons of water were removed from each well using a steel bailer and PVC submersible two- stage pump Temperature, pH and conductivity of purged ground water were measured at 5-gallons, using a Hydac water analyzer The field data and field sheets are included in Appendix B Purged water was temporarily stored on-site in 55-gallon DOT-approved H-17 storage drums pending proper disposal The casing elevation of each well installed for the investigation was surveyed relative to well MW-1 with a relative elevation of 5 50 feet On 07 November 2000, AGE surveyed a reference point on the top of each ground water monitoring well at the site to the nearest 0 01-foot The results of the monitoring well survey are contained in Table I I 25 MONITORING WELL PURGING AND GROUND WATER SAMPLING On 03 October 2000, a Solinst water level meter was used to measure the depth to ground water in monitoring wells MW-1 through MW-5 After depth to ground water measurements were taken, a minimum of 3 saturated'casing volumes of water were purged from each well to be sampled using a PVC submersible two-stage pump Ten gallons of water were removed from each well Temperature,pH and conductivity of purged ground water were measured at 2-gallon intervals using a Hydac water analyzer The field data and field sheets are included in Appendix B Purged water was temporarily stored on-site in 55-gallon DOT-approved H-17 storage drums pending proper disposal Following purging, the depth to ground water was measured to ensure that a minimum of 80% well-volume recharge had been achieved prior to sampling IA water sample was collected from each well using a new, clean, disposable plastic bailer Immediately upon retrieval, samples were transferred into one-liter amber bottle with no sample preservation and into three 40-m1 EPA-approved volatile organic analysis (VOA) vials containing . 0 5 ml 18% hydrochloric acid as a sample preservative The samples were logged on a chain-of- custody form, stored in a chilled container and transported under chain-of-custody to MAI for analysis Advanced CcoEnvironmental,Inc