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4 <br /> III. Ground-Water Conditions <br /> In light of community concerns about possible effects of gravel mining on ground water, ground- <br /> water level and quality data have been collected quarterly from the network wells since March <br /> 1994 in order to initially characterize pre-mining ground-water conditions beneath the permitted <br /> mining area and to eventually identify any direct effects of aggregate extraction. Also, as part of <br /> Teichert's plan to dry-pit mine, monitoring of the ground-water levels will provide the necessary <br /> input to eventually establish and maintain a buffer between the base of mining and ground water. <br /> The quarterly measurements made in 1994, 1995, 1996, and early 1997 have been compiled into <br /> a table of ground-water depths and corresponding elevations in each network well. In addition, <br /> ground-water elevation hydrographs for selected wells are presented in this section to illustrate <br /> ground-water conditions beneath the area during the last three years of monitoring activities. <br /> Ground-water elevation contour maps for selected periods are presented in this section to further <br /> illustrate recent ground-water conditions. A table of the corresponding water-quality results from <br /> r� <br /> each well sampled is also presented, as are hydrographs of selected water-quality constituent <br /> concentrations in selected wells. Ground-water elevation hydrographs for each network well, <br /> f` ground-water elevation contour maps for each quarter, and laboratory analytical data sheets for <br /> each well sampled are included in the Appendix. <br /> i <br /> Ground-Water Levels <br /> Ground-water levels measured in the shallow wells were stable throughout 1994, 1995, 1996, and <br /> early 1997, typically fluctuating three feet or less during this time. Ground-water elevations in <br /> the shallow zone ranged from approximately 76 feet MSL in the southeast portion of the <br /> monitoring network area to 86 feet MSL to the northwest. The lowest ground-water levels in the <br /> shallow network wells have been observed generally during the late spring to summer, with <br /> © LLIHDORFF & SCALMANINI <br /> F CONS V LT I NG ENGINEERS <br />