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BBL <br />BIASIAND, BOUCK & LEE, INC. <br />en Blneers & sclentls is <br />Transmitted Via U.S. Mail <br />June 4, 2004 <br />Mr. Larry Oehler <br />Environmental Protection Specialist <br />Division of Minerals and Geology <br />Department of Natural Resources <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />Re: Holcim (US) Inc. Portland, Colorado Quarry Groundwater Monitoring Report <br />DMG Permit No. M-1977-344, Technical Revision No. 6 <br />BBL Project # 254.50.002 <br />Dear Larry: <br />Please find enclosed two copies of the Holcim (US) Inc. Groundwater Monitoring Report, which <br />summarizes analytical results for a groundwater sample collected at monitoring well MW-10 on <br />April 9, 2004. Blasland, Bouck, and Lee, Inc. will sample MW-10 for one more quarter, and will <br />relay that data to you to complete the requirements of Technical Revision No. 6. The next round <br />of quarterly groundwater sampling at MW-10 is scheduled for July, 2004. <br />Please contact me or Mike Gantenbein at the quarry if you have any questions, <br />Sincerely, <br />BLASLAND, BOUCK & LEE, INC. <br />Al Notary, P.E. <br />Associate <br />Enc. <br />cc: Mike Gantenbein, Holcim (LJS) Inc. <br />Paul Detterline, Holcim (US) Inc. <br />Chris Peters, BBL, Inc. <br />14142 Denver Wesi Parkway • Suite 350 • Golden, CO 80401-3190 <br />Tel (303) 231-9115 • Fax (303) 231-9571 • www.bbl-inacom • offices nationwide <br />1:Wolcim\GW Monitoring Reports\April 2004\Cover Letter.doc <br />