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04 February 2004 <br /> AGE-NC Project No 95-0173 <br /> IPage 6of10 <br /> (A and B), AW-2 (A and B), AW-4, MW-1, MW-2 and MW-3 are in Appendices D through J, <br /> Irespectively In addition,a Solinst Water Level Indicator was used to manually collected draw-down <br /> data from wells AW-4, MW-2 and MW-3 during the constant-rate pumping test <br /> 3 1 VARIABLE-RATE 'STEP' GROUND WATER PUMPING TEST <br /> On 09 July 2003, the aquifer `step' draw-down pump test(variable-rate pump test) was performed <br /> at the site The first stage of the pump test consisted of extracting ground water from EW-1 at a rate <br /> of 3 3 gallons per minute(GPM), the second stage consisted of extracting ground water at a rate of <br /> 5 5 GPM, and the third stage consisted of extracting ground water at a rate of 4 3 GPM <br />' During the first stage of the pump test (pump rate of 3 3 GPM),the maximum ground water draw- <br /> down measured in extraction well EW-1 was 5 19 feet after approximately 60 minutes of pumping <br /> operation, due to an equipment malfunction, the test was terminated after 60 minutes of operation <br /> Draw-down also was measured in observation wells AW-1 A(located 13 feet towards the southwest) ' <br /> and AW-2A(located 17 feet towards the northeast)at 0 14 feet and 0 17 feet,respectively(Table 2), <br /> no significant draw-down was recorded in observation well MW-1 <br /> I <br /> During the second stage of the pump test(pump rate at 5 5 GPM),the maximum ground water draw- <br /> down measured in well EW-1 was 9 79 feet after approximately 110 minutes of pumping operation, <br /> due to an equipment malfunction,the test was terminated after 110 minutes of operation Draw-down <br /> also was measured in wells AW-1A and AW-2A at 0 30 feet and 0 46 feet, respectively(Table 2), " <br /> no significant draw-down was recorded in well MW-1 <br /> k� <br /> During the third stage of the pump test (pump rate at 4 3 GPM),the maximum ground water draw- <br /> down measured in well EW-1 was S 10 feet after approximately 70 minutes of pumping operation, �' <br /> due to an equipment malfunction,the test was terminated after 70 minutes of operation Draw-down cT <br /> also was measured in wells AW-lA and AW-2A at 0 27 feet and 0 46 feet, respectively(Table 2), <br /> Ino significant draw-down was recorded in well MW-1 <br /> Utilizing the maximum draw-down data collected during the first(3 3 GPM),second(5 5 GPM)and <br /> third stages(4 3 GPM)of the pump test, a plot of EW-1 draw-down for all three pumping rates was <br /> generated, from the plot, a best fit line was projected between the data points that estimated the <br /> maximum draw-down at EW-1 at specific pumping rates(Appendix D) Results of the ground water <br />' aquifer `step' pumping test are summarized in Table 2 <br /> �� Advanced GeoEnviron mental,Inc <br />