Laserfiche WebLink
-6- <br />Rule 6.4.20 Exhibit T - DMO EPP. <br />Comment: It does not appear that all requirements of Rule 6.4.20 have been addressed. The mine itself will have <br />residual toxic-forming materials exposed during mining and left in place after mining. Potential weathering and <br />leachate from the residual in situ mine rocks must be addressed. In accordance with Rule 6.4.20(6)(b)(ii), Operator <br />must describe how the toxic-forming material in the underground will be handled during and after mining to ensure <br />that the affected lands will be reclaimed and returned to the approved post-mining land use. <br />In accordance with Rule 6.4.20(6)(b)(iii), Operator must describe how they will prevent adverse off-site impacts <br />during periods of active mine site operations and periods of Temporary Cessation, from not only the ore and waste <br />that are extracted but also from any toxic-forming material left in situ after mining. In other words, how will <br />potential leachate from the mine wallrocks during and after mining be managed? <br />This letter shall not be construed to mean that there are no other technical deficiencies in your application. The <br />Division will continue to review your application to determine whether it is adequate to meet the requirements of the <br />Act after submittal of additional information. <br />If you need additional information please contact me at the Division of Reclamation, Mining and Safety, Grand <br />Junction Field office, 101 S. 3rd St., Suite 301, Grand Junction, Colorado 81501, or by telephone no. 970.241.1117. <br />Sincerely, <br />f <br />G. Russell Means <br />Environmental Protection Specialist II <br />Cc: Steve Shuey, Senior Environmental Protection Specialist, West Team Supervisor (e-mail) <br />David Bird, DRMS Geochemist <br />Allen Sorenson, DRMS Engineer