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Require- ment Require- complied Requirement ment with ? lyes Comment citation I no/indeterm -inatel Q. Content of CDMG pond reports regulation yes 4.05.6(] 3) R. Sampling Page 5-36 frequency of of CDMG ground water mining yes monitoring permit C- wells 92-080 S. Para- meters page 5-36 to be of CDMG analyze d in mining yes ground Permit C- 92-080 water sam les The following two aquifers are the most likely [o be affected by mining a[ Carbon Junction: the Animas River alluvium (400 ft. downstream from the main mine operation) and the Pictured Cliffs Sandstone (subcrops beneath the pit). Ground water is CWQCC monitored in three wells: 17b (upgradient from the mine, perfed T. Basic regulation 20-60 ft. in the sandstone directly above [he Lewis coal), 94-I Standards indeterm- (located within the mine, completion information unavailable), for Ground s 41.4 and inate and 95-I (located downgradient from the mine, completion Water 41 5 information unavailable), Historical data indicate compliance with the Basic Standards for ground water if compliance points were established at the well locations. IVot knowing completion intervals of two monitoring wells prevents conclusion on compliance with basic standards for the known aquifers, Animas River alluvium and Pictured Cliffs Sandstone. U. Restoration of ground water CDMG Carbon Junction's approximate 100-acre surface disturbance recharge [o regulation yes probably is not enough to diminish recharge to aquifers. approximate 4.05.11(3) premining rate V. Prevention of adverse impacts [o CDMG inderterm- Cannot determine compliance with the Basic Standards for ground water regulation systems 4.05.11 inate ground water, as explained in item Z, below. outside the ermit area Page 3