ARCHIVED REPORTS XR0000659 - Laserfiche WebLink

Home Browse Search

i , E . I 15 October 2000 t' ' AGE-NC Project No 96-0232 Page 7of15 a transmissivity value was calculated at 774 gal/day-fl, a specific yield value is calculated at"0 034 ti and a radius of Influence is projected at 17 feet utilizing a semi-logarithmic plot of draw-dawn i 1 p r; versus distance (Appendix G) . r During the second stage purr'ip test(6 6 GPM), the greatest ground water drawn-down was observed in extraction well.EW-2 at 8 26 feet after 600 minutes of pumping operation, draw-down was ' observed in wells EW-1 at 1 85 feet and in MW-1 at 198 feet "Minor decreases In ground water p levels from well EW-3 were observed at as much as 0 14 feet, in MW-6A at as much as 0 03 feet and in MW,-9A at as much as 0 05 feet. Results of the stage 2 pump test ground water draw-down ' levels are summarized in Table 3 Utilizing data collected from well EW-1, EW-2 and MW-1, a trarismissivity value was calculated at 718 gal/day-ft, a specific yield value is calculated at 0 21 and aIradius of influence is projected at 20%2 feet utilizing a semi-logarithmic plot of draw-down versus distance (Appendix G) , ,I During the third stage pump test(10 0 GPM), the greatest ground water drawn-down was observed in extraction well EW-2 at 12 06 feet after 50 minutes of pumping operation, draw-down was observed in wells EW-1 at'2 81 feet and In MW-1 at 3 08 feet Minor decreases in ground water lot, levels in well EW-3 were observed at as much as 0 11 feet, in MW-6A at as much as 0 12 feet and in MW-9A at as much as 0 05 feet Results of the stage 3 pump test ground water draw-down levels are summarized in Table 4 Utilizing data collected from wells EW-1, EW-2 and MW-1, a transmissivity value was calculated at 829 gal/day-ft, a specific yield value was calculated at 0 03 and a radius of influence was projected at 23 feet utilizing a semi-logarithmic plot of draw-down ' versus distance (Appendix G) 4 Utilizing the greatest observed draw-down levels at ground water extraction flow rates of 4 GPM, 6 6 GPM and 10 GPM, a theoretical best-fit line was generated on a serni-loganthmic plot of draw- ' `I down ve'rsu's extraction flow rates (Appendix G) Plotting the prod ected radii of influence(Appendix B, C and D) at ground water extraction flow rates of4 GPM, 6 6 GPM and 10 GPM, a theoretical best-fit line was generated on a semi-loganthmuc plot The theoretical best-fit line can be utilized to project the approximate radius of influence for 1 known extraction flow rates (Appendix G). ! 3 ' 4 2 SECOND ZONE AQUIFER PUMP TEST, 21 JULY 2000 ' I The fourth stage of ground water pump testing consisted of extracting ground water at a rate of 10 ' GPM utilizing a flinch diameter submersible Grundfos Redi-flo pump, after 400 minutes of ground' water extraction the pump,test was terminated,because the 5,900-gallon Baker tank reached full Od capacity The pump test utilized pressure transducers deployed in wells MW-1, EW-2 and EW-3 ! e E I Advanced GeoEnvirnnmental,Inc. A