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Require- <br /> Require- ment <br />Requirement ment complied Comment <br /> citation with ? <br /> es/no <br />R. Sampling Section <br />frequency of 2.04.7 of <br />ground water CDMG yes <br />monitoring mining <br />wells permit C- <br /> 81-035 <br />S. Para- <br />meters Section <br />to be 2.04.7 of <br />analyze CDMG <br />d in mining yes <br />ground permit C- <br />water 81-035 <br />sam les <br /> The following two aquifers are the most likely to be affected by <br /> mining at King Coal: the Hay Gulch alluvium and the Cliffliouse <br /> Sandstone. The Hay Gulch alluvium is monitored in the Wiltze <br /> well, downstream from the west sed. pond. Historical data indicate <br /> compliance with the Basic Standards for ground water in this <br /> aquifer if a compliance point were established at the Wiltze well <br /> location. <br /> Although ground water impacts to the Cliffhouse Sandstone are <br /> not expected, compliance with the basic ground water standards in <br /> this aquifer is not known because the Cliffhouse is not monitored. <br /> Impacts to the Cliffliouse are not expected, however, due to the dry <br /> conditions of the mine. It seems unlikely the King Coal Mine will <br /> ever fill with water. The workings have been dry (with the <br /> exception of a short time in early 1986) and drillholes in the <br /> overburden have been dry. (Water for the mine's dust and fire <br /> CWQCC control is pumped from an alluvial well and an old well of <br />T. Basic regulation unknown depth.) Aground water point of compliance in the <br />Standards Cliffhouse Sandstone is not warranted because the King Coal <br />for Ground s <br />41.4 and yes operation lacks the potential to negatively impact this unit. <br />Water 41.5 A regional aquifer about 250 fl. stratigraphically below the mine <br /> workings, the Point Lookout Sandstone, was has been monitored <br /> since late 2000 in the Haugen well about 5000 ft. downgradient <br /> from the workings. Data show no impacts to the ground water in <br /> the Haugen well from mining at King Coal. <br /> The Point Lookout Sandstone is unlikely to be in hydraulic <br /> communication with the overlying King Coal Mine workings <br /> through intergranular porosity due to impermeable shale and <br /> siltstone in the intervening Menefee Formation. Communicatiron <br /> through fractures or faults could occur if the mine workings flooded <br /> to a level that produces enough head to overcome the <br /> potentiometric head of native ground water in the faults and <br /> fractures. As previously explained, it seems unlikely the King Coal <br /> Mine will ever fill with water. Aground water point of <br /> compliance in the Point Lookout Sandstone is not warranted <br /> because the King Coal operation lacks the potential to negatively <br /> im act this unit. <br />Page 3 <br />