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18 June 2001 AGE-NC Project No. 98-0432' ' Page 2 of 6 ' Prior to initiation of the test, the depth-to-ground water was measured in the extraction well EW.-1, and in monitoring wells, using a Solinst water level meter. Well EW-1 is screened from 15 to 30 feet below surface grade (bsg). The other wells are screened from approxiinately 10 to 30 feet bsg. ' The pump test utilized 7/s-inch diameter, model 3001 Solinst Levelogger pressure transducers that were deployed in wells EW-1, MM-1, MW-3 and MW-5. The height of the water column was measured by the datalogger at one-minute time intervals. Each pressure transducer was pre- programed prior to the pumping test to log water levels at one-minute intervals. Copies of pressure transducer water level data logged from well and filed sheets are in Appendix A. Semi-logarithmic plots of draw-down versus time for MW-1, MW-3, MW-5 and EW-1 are in Appendix B. During the constant rate pumping test the following maximum water drawdown was observed: • The maximum ground water drawn-down in extraction well EW-1 was observed to be approximately 6.5 feet after 30 minutes of pumping, then drawdown stabilized at ' approximately 5.7 feet after 420 minutes of pumping; • Draw-down was observed in well MW-1 (located 5 feet toward the northwest)at 0.7 feet • after 720 minutes of pumping, • Draw-down was observed in well MW-3 (located 30 feet toward the northeast) at 0.22 feet after 720 minutes; • Draw-down was observed in well MW-5 (located 60 feet toward the northeast) at approximately 0.13 feet after 720 minutes of pumping; ' Drawdown was observed in well MW-2 (located 75 feet toward the. northwest) at approximately 0.17 feet after 720 minutes of pumping; ' Drawdown. was observed in well MW-6 (located 85 feet toward the southwest) at approximately 0.13 feet after 720 minutes of pumping and • No measurable draw-down was observed in well MW-4(located 100 feet toward the north). • Table 2 shows the drawdown for each well, distance from pumping location and duration. During the pump test, three sets of a grab samples were collected prior to discharge into the tank utilizing three 40-m1 EPA-approved volatile organic analysis (VOA) vials containing 0.5 ml 18% T1 hydrochloric acid as a sample preservative and one 1-liter amber bottle. The three samples were r collected at 11:30 am (4 hour); 3:30 pm (8 hours) and at the-termination of the test 7:30 pm (12 hours). Advanced GeoEnvironmental,Inc.