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Require- i <br /> ment <br /> Require- complied <br />Requirement ment with ? (yes Comment <br /> citation / <br /> no/indeterm <br /> -inate <br />Q. Content of CDMG <br />pond reports regulation yes <br /> 4.05.6(13 ) <br /> The monitoring plan on permit page 5-36 calls for sampling 3 <br /> wells semiannually for both field parameters and full suite <br />R. Sampling Page 5-36 analysis. One of the three wells (95-1) was not sampled for field <br />d <br />frequency of of CDMG parameters in the 2" <br />half of 2001 and in the first half of 2002. <br />ground water mining ne Also, this well was not sampled for full suite analysis in first <br />monitoring permit C- half 2002. These missed samples create a gap in the monitoring <br />wells 92-080 record for the downgradient monitoring well, 95-1. This gap <br /> hinders the identification of trends in ground water quality and <br /> flow. (See further discussion in item T, below.) All other <br /> sam ]in fre uencies were met. <br />S. Para- <br />meters page 5-36 <br />to be of CDMG <br />analyze For the samples collected, all required parameters were <br />d in perm <br />g yes analyzed. <br />ground i <br />C <br /> 92-080 <br />water <br />sam les <br /> Alluvial aquifers: Animas River alluvial water can be <br /> expected to have not been degraded by mining because the less <br /> than 50-acre surface area of spoil a[ the mine would not generate <br /> enough leachate to overcome the dilutional effect of native <br /> alluvial ground water. <br /> Bedrock aquifers: The following two aquifers are the most <br /> likely to be affected by mining at Carbon Junction: the Animas <br /> River alluvium (400 ft. downslope from the mine) and the <br /> Pictured Cliffs Sandstone (subcrops beneath the mine pit). <br /> CWQCC Ground water is monitored in three wells: 17b (upgradient from <br />T. Basic regulation the mine, perfed 20-60 ft. in the sandstone directly above the <br />Standards Lewis coal), 94-7 (located within the mine, drilled 1/94 320 ft. <br />for Ground s yes to Pictured Cliffs Sandstone, 4-inch casing perforated 20 - 320 <br />Water 41.4 and ft.), and 95-1 (located downgradient from the mine, drilled in <br /> 41.5 1194 to total depth 350 fr., perforated depths unavailable, <br /> presumably perforated like 94-1 well i.e. top to bottom). The <br /> presumed perforated interval of down-gradient we1195-1 <br /> extends through sandstone beds in the Fmitland formation and <br /> the Pictured Cliffs sandstone. The samples missed in 2001 and <br /> 2002 from we1195-1 hinder finding the mine operator in <br /> compliance with the Basic Standards for Ground Water. <br /> Samples from that well before and after the missed sample <br /> events, however, indicate the mine operator probably is in <br /> com Hance. <br />Page 3 <br />