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09/07/2004 14:41 2094671118 AGE STOCKTON PAGE 06/10 07 Tune 2001 AGE-NC Project No. 95-0103 Page 2 of 6 2.1. AQUIFER PUMPTNG TESTS Step Drawdown Test- 07 March 2001 Prior to initiation of the test,the depth-to-ground water was measured in the extraction well VE-6, the three temporary wells designated T1,T2 and T3, and in monitoring well MW3,using a Solinst water level meter. Pressure transducers were placed in VE-6, T1 and T3. The height of the water column was measured by the datalogger one-minute time intervals. 'We)I VE-6 is screened from 5 to 25 feet below surface grade (bsg). The after wells are screened from 10 to 20 feet bsg. The pumping test consisted of extracting ground water from vapor extraction well VE-6 utilizing a 4-inch diameter submersible Grundfos Redi-flo pump. Pumping began at one gallon per minute (gpm).After 120 minutes,the pumping rate was increased to two gprr>.The pumping rate was again. increased to 3 gpm after approximately 240 minutes of pumping. Approximately 1,080 gallons of water were removed from VE-6 during the eight-hour test. The pump test utilized 7/8-inch diameter,model 3001 Solinst Levelogger pressure transducers that were deployed in wells T1,T3 and.VE-6. 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 Tl, T3 and VE-6 are in Appendix A. During the variable rate pumping test (1 to 3 gpm), the maximum ;;round water drawn-down in extraction well VE-6 was observed to be 6.5 feet after 480 minutes of pumping operation(Appendix A);maximum.draw-down was observed in wells Tl. (located 5 feet toward the east)at 1.9 feet after 480 minutes of pumping operation(Appendix A); draw-down was observed in well T2(located 15 feet toward the south)at 1.4 feet after 480 minutes(Appendix A);and less than measurable changes in the water elevation were detected in well MW-3 (located 50 feet toward the west). Constant Rate Drawdown Test- 12 March 2001 The static pumping test consisted of extracting ground water from well VE-6 at a rate of 3 gpm utilizing a 4-inch diameter submersible Grundfos Redi-#To pump. Approximately 3,600 gallons of water were removed from VE-6 during the 12-hour constant rate drawdown test. The depth-to-ground water was measured in the extraction well VE-6; the three temporary wells designated Tl,T2 and T3;monitoring well.MW3 and vapor extraction well VW-1,using a Solinst water level meter. The test utilized 7/8-inch diameter, model 3001 Solinst Levelogger pressure transducers that were again deployed in wells T1, T3 and VW-1 to continuously record drawdown Advanced GeoEnvironmentul,Ino.