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• Well GB1 is completed in the sandstone below the I coal (KLM <br /> aquifer) and is located at the base of the A pit, where the H and <br /> I coal seams were mined. Mining occurred in this area during <br /> 1985. Figure A-3 shows that water levels were rising at a steady <br /> rate during the period 1985 through September 1987. Well GB1 was <br /> airlifted for production in September in 1987, 1988, and 1989 for <br /> monitoring of the recovery of water levels. Data presented from <br /> September through September of each of the last three years shows <br /> the recovery of water levels after production . This data indicates <br /> that the recovery of water levels in well GB1 is very slow with <br /> water levels not reaching the aquifer static level prior to being <br /> airlifted the next year. Well GB1 is monitored only for <br /> • water-level data and is airlifted annually to test the <br /> responsiveness of the well . Due to the very slow recovery of <br /> water levels, a more accurate static water-level would be obtained <br /> by not air lifting this well . <br /> Water levels in well GB2, which is completed in the Third <br /> White Sandstone, were very steady until 1982 when a drop in water <br /> level of approximately six feet occurred over a two year period . <br /> Water levels the last six years have remained steady. <br /> Well GB5 monitors the HI aquifer at the base of the A pit. <br /> Water levels (see Figure A-5) in this well gradually rose from <br /> 1984 to March 1988. Water levels during the rest of 1988 and the <br /> first half of 1989 remained stable. The water levels for the <br /> second half of 1989 have shown a slight decline. The majority of <br /> • this water-level response is thought to be due to recovery of the <br /> 2-5 <br />