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1 <br /> 06 November 2002 <br /> AGE-NC Project No 98-0432 <br />' Page 6of8 <br />' Drawdown was not observed in wells MW-3, MW-4 and MW-5 (located between 145 feet <br /> and 200 feet away) <br />' Copies of pressure transducer water level data logged from well and filed sheets are in Appendix B <br /> Semi-loganthmic plots of draw-down versus time for MW-1, MW-2, MW-9 and EW-1 are in <br />' Appendix C <br />' 4 3 1 Aquifer Pumping Analysis <br /> For the pumping test conducted at well EW-1, the drawdown data collected in observation wells <br />' MW-1 through MW-9 were used to determine the aquifer properties The maximum ground water <br /> drawdown in the observation wells for the pumping test was plotted against the distance of each well <br /> from the extraction point on semi-logarithmic paper Utilizing the Distance-Drawdown Method <br />' (Jacob straight-line method), general transmissivity, storativity and hydraulic conductivity values <br /> were determined <br /> Ground water levels in observation wells within twice the aquifer thickness or within 30 feet, <br /> appeared to be influenced during the pumping tests,results of the aquifer ground water pumping test <br /> are summarized in Appendix D Utilizing data collected from the monitoring wells, transmissivity <br />' value was calculated at 1,000 ft'/day or 7,462 gallon/day/feet, a storativity value calculated at 0 17 <br /> and the hydraulic conductivity value of 0 175 cm/s A semi-logarithmic plot of draw-down versus <br /> distance is depicted in Appendix D <br /> 1 <br /> 4 4 EXTRACTED GROUND WATER ANALYTICAL RESULTS <br />' The results of the laboratory analysis for the grab ground water samples collected atapproximately <br />' 360 minutes, 1,440 minutes and 2,800 minutes are as follows <br /> • The grab ground water sample collected at 360 minutes had TPH-g at 1,300 micrograms per <br /> liter(gg/l) The BTEX compound xylene was detected at a concentration of 12 µg/1 MTBE <br />' was detected at a concentration of 1,000 µg/l by EPA Method 8020 and at a concentration �y�J43 <br /> of 1,200 µg/1 by EPA Method 8260 TBA, �Vdetected at <br /> concentrations as high as 78 µg1l, 7"H h" was deterfcdL <br />' The grab ground water sample collected at 1,440 minutes had 1,200 gg/l TPH-g MTBE was <br /> detected at a concentration of 930 gg/l by EPA Method 802P and at a concentration of 1,100 <br /> gg/l by EPA Method 8260 TBA, , s detected at concentrations as <br /> high as 86 µg11, and'TA mE w&s datt*td, o)r $�ua�,�� �, 1�a DCF} wci.s dez}e.r "La;c ? S QL <br /> Advanced GeoEnvironmental,Inc <br /> I <br />