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Sant By: CEMEX; 3039232199; Nov-1-04 10:03AM; Page 2/4 <br />,~~c~m~x / <br />November 1, 2004 <br />Erica Crosby <br />Colorado Division of Mlnerels and Geology <br />t 313 Sherman Street. Room 215 <br />.. ~ ~LrT <br />~~VV 0 i 2C04 / <br />Oiei~ien a1141inerals & Geology <br />`TR- ~4 V' <br />Denver, Colorado 80203 / / <br />Subject: Technical Revl/sion, Parmtt No. M-1977/208, Lyons Quarry, Cemex, Inc., <br />Cement Klln Dust laposal 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. Sampling, Analysis and Reporting Plan (prepared by Eric Hodek, Cemex) <br />2. An updated computer model and report prepared by Richard Henry, URS Corporation. <br />3. A review of currenNy approved ground water mondodng and compliance points along <br />with a proposal to revise these; prepared by Paul Banka, Banks and Gesso <br />4. A drainage control discussion, prepared by Paul Bariks, Banks and Gesso. <br />The sampling, analysis and reporting pin is attached !o this letter as weA as the updated <br />~mputer model and report The monkoring end compliance points plans and the drainage <br />control discussion are embodied in this letter, except for a map and cross section which are also <br />attached. This submittal reflects previous commitments made by Cemex, related to the disposal <br />o} cement kiln dust in CpR. <br />Monitoring and Comoliaace Points <br />The 1889 Technical Revision concerning CKD disposal In C-pit was approved with A-pit water <br />being both the monkortng and compliance point for comparison with applicable ground water <br />standards for the water quality parameters identified by the Division. Monitoring of A-ptt since <br />the 1999 TR approval indicates contpilanoe with the standards. <br />At the request of the Division, Cemex has re-evaluated the suitability of A-pit water to serve this <br />purpose. Abase map was created, water surtace elevations were surveyed and crass sections <br />were Created. The U.S. Geological Survey Geologic Map of the Hygiene Quadrangle was used <br />urwe taa grre~a <br />P.O. Sox 6ZD, lyana CaareCo E051a, LISA, Phaw: (3D3) 82}2100, r2x:131Y11 B2i2149 <br />