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Require- Complied with? <br />Requirement ment (yes I no) Comment <br /> citation <br />P. Para- Exhibit 29 of <br />meters to be CDRMS <br />analyzed in <br />ground mining yes <br /> permit C-81- <br />water 044 <br />sam les <br /> Although the Middle Sandstone is the aquifer most <br /> likely to be affected by mining at Eagle, the <br /> Middle Sandstone does not have the potential to be <br /> negatively impacted because head in this unit is <br /> greater than the predicted maximum head created <br /> by water Bumped in the mine workings (see DRMS <br /> Memorandum in SL-2 bond release file, dated <br /> 4/5/05). A ground water point of compliance has <br /> not been established for the Middle White because <br /> of the absence of potential for negative impact. <br /> The Middle White Sandstone is monitored <br /> downgradient from Eagle's underground workings <br />Q. Basic Standards C WQCC in well TR-7A. Data from this well indicates the <br />for Ground regulations yes mine would comply with the Basic Standards if <br />Water 41.4 and 41.5 TR-7A were considered as a compliance point. <br /> For example, TDS in TR-7A in 2005 was 266 mg/I <br /> (calculated as 0.7 X 366 umhos/cm conductuctivity <br /> = 266 mg/I), which is less than the 393 mg/I <br /> backgound value identified in the DRMS <br /> Memorandum of 4/5/05. The Memorandum also <br /> explains that, based on analogy with the Foidel <br /> Creek Mine, gob leachate from the Eagle Mines is <br /> not likely to cause an exceedance of the Basic <br /> Standazds for Ground Water in the unmined coal <br /> seams down dip from the mine if TDS of the <br /> leachate is a value greater than the maximum 2,600 <br /> m I recorded in 4'h uarter 2005. <br />R. Restoration of The Eagle Mines are located along the outcrop belt <br />ground water CDRMS of the Williams Fork Formation. Ground water is <br />recharge to regulation yes recharged in this outcrop belt. The Eagle Mines do <br />approximate 4.05.1 I (3) not diminish the amount of this recharge. <br />reminin rate <br />S. Prevention of <br />Compliance with the Basic Standards for ground <br />adverse impacts CDRMS water, as explained in item Q, above, indicate the <br />to ground water regulation yes permittee is preventing adverse impacts to ground <br />systems outside 4.05.1 l water systems outside the permit area. <br />the ermit area <br />Page 3 <br />