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<br />®~cmcx <br />Erica Crosby <br />Environmental Protection Specialist <br />Division of Minerals and Geology <br />Colorado Department of Natural Resources <br />1313 Sherman St., Room 215 <br />D CO 80203 <br />March 29, 2006 <br />Via Certified Mail <br />Return Receipt Requested <br />enver, 7004 2890 0003 2049 5856 ~~~ <br />Subject: Cemex, Inc., Lyons Quarry, Permit No. M-1977-208, Technical Revision No. 71/ <br />(TR-07), pH and Selenium Treatment of C-pit Water <br />Dear Erica:- - - - - <br />This letter and attachment, along with a check for $188, comprises Technical Revision No.7 <br />(TR-07) for the above referenced permit. TR-07 was required by TR-06 and addresses the <br />contingency of treating C-pit water for selenium and pH. <br />If you have any questions regarding this submittal, please feel free to contact me at (303) 823- <br />2115. <br />Sincerely, <br />~~_ <br />Eric S. Hodek <br />Environmental Manager <br /> <br />MAR 3 i 2006 / <br />()rv5ron of Minerals and G0olo9Y <br />Encl <br />Cc: Paul Banks, Banks and Gesso, LLC <br />Al Notary, Brown and Caldwell <br />Untied States Operations <br />P.0. Box 529, Lyons, Colorado. 80540. USA. Phone: (303) 823-2100, rax: (303) 823-2199 <br />