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~~ Banks and Gesso, LLC ~ 720 Kipling St.,Suite117 <br />~^ Lakewood, Colorado 80215 <br />RECEIVED (303)274-4277 <br />Fax (303) 274-8329 <br />DEC 0 1 2(~>} / www.banksandgesso.com <br />December 1, 2004 a <br />!IYroisionoil~lineral- ;-:: - '~ ~a~ c / <br />Erica Crosby I \ J <br />Division of Minerals and Geology <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />/ '~ <br />Subject: Technical Revision-O5, Permit No. M-1977-208, Lyons Quarry, <br />Ceme}c, Inc., Cement Kiln Dust Disposal in C-pit <br />Dear Erica: / / <br />This letter, and attachments (and check for $188), comprise an application for a Technical <br />Revision (TR) to the above referenced permit. <br />This TR application contains the following: <br />1. Water Balance Analysis <br />2. Source Removal Plan <br />3. Water Treatment Plan <br />Water Balance Analvsis <br />Attached to this letter is a water balance analysis for C-pit. The analysis accounts for <br />precipitation, evaporation, dust control water, pumping for operational demands and some minor <br />seepage from C-pit. The analysis results in a conclusion that the C-pit pond will be reduced to <br />its smallest practical size by December 2005. The smallest practical size of the pond is <br />controlled by the minimum depth of water that the submersible pump is capable of pumping <br />(which is 4 feet). The area that the pond will occupy at 4 feet maximum depth is not known, <br />however it will be significantly smaller than the approximate 7 acres that it currently covers. <br />C-pit water is currently pumped to the cement plant for use as cooling tower water. This <br />practice will continue until the pond can no longer be pumped due to pump limitations. At this <br />point A-pit water will be pumped to the cooling tower. <br />It is Cemex's intent to keep the C-pit pond at its smallest practical size by continuing to pump if <br />the minimum water depth allows. Therefore the submersible pump and piping will need to <br />remain available until final reclamation of C-pit or until C-pit is no longer capable of holding <br />standing water. <br />Potential treatment of accumulated water in C-pit, after it reaches the smallest practical size will <br />be discussed later in this TR application. <br />