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By: CEMEX; 3038232199; <br />~~cmcx <br />Ms. Erica Crosby <br />Environmental Protection Specialist <br />Department of Minerals and Ceology <br />Colorado Department of Public Health and Environment <br />1313 Sherman Street, Room 2] 5 <br />Denver, Colorado 80203 <br />RE: CEMEX, Inc. -Lyons Quarry <br />Permit No. M-1977-208 <br />Selenium and Thallium Results for C-Pit <br />Dear Ms. Crosby, <br />May-17-04 <br />9:1 BAM; <br />Page 2 <br />May 17, 2004 <br />Vie Certified Mail <br />Return Receipt Requested <br />7002 2410 0001 8100 6987 <br />This letter saves to notify you of a potential exeeedance of the numeric protection level (NPL) <br />t'or selenium based upon sampling conducted on April lb, 2UU4. The results indicate the <br />presence of selenium at 0.069 mg/I, which is above the 0.02 mgli, NPL, estahlished by the <br />permit. It is important to note that no selenium was detected in the A-pit which is down gradient <br />from C-pit. ' A copy of the analytical results is enclosed. <br />As this is the first time selenium has been detected, CEMEX intends to conduct confirmatory <br />resampling to determine if in fact this is due to a sampling or analytical error. This sampling <br />will be conducted on May 19, 2004. If you have any questions regarding this submittal, please <br />feel free to contact me at. (303) 823-2115. <br />Sincerely, <br />~~~~ <br />Eric S. Hodek <br />Environmental Manager <br />2 Encl <br />Cc: John Lohr <br />Jeet Gill <br />t4Alted $IitOi OpOf0B00f <br />P.U. Bar 529, Lyonx Loroiado 80540. U54, Phone: (3B31823~2100, fax: (30318232199 <br />