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esc, cb>~ <br />~~cmcx ~ <br />Ms. Erica Crosby <br />Environmental Protection Specialist <br />Division of Minerals and Geology <br />Colorado Department of Natural Resources <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />RE: CEM-1 Monitoring Results (2nd Quarter) <br />Dear Ms. Crosby, <br />I ~ 77-~ o ~ <br />August 25, 2006 <br />Via Certified Mail <br />Return Receipt Requested <br />7004 28900003 2049 6006 <br />Enclosed with this letter, are the results of the monitoring well sample taken for the 2nd Quarter <br />of 2006. Brown and Caldwell collected these samples on 7/25/2006. Environmental Science <br />Corp. completed the analytic report on 8/14/2006. The summazy of results is indicated in the <br />table below. <br />Analyte Date of Collection: 7/25/2006 <br /> CEM-001 <br />Dissolved Selenium <1.0 µ 1 <br />Dissolved Thallium <1.0 µ 1 <br />H 7.5 <br />Dissolved Solids 5.1 <1.0 µ 1 <br />Sulfate <5000.0 <1.0 1 <br />Chloride 2.2 <1.0 µ 1 <br />Please feel free to contact me with any questions or concerns you may have regarding this <br />submittal. <br />Sincerely, <br /> <br />Envirotimt~Nal Specialist <br />Office: (303) 823-2141 <br />Jenniferz.Zabel @cemexusa.com <br />REG~14r~~ <br />~duc 28 Zoos <br />D.~inin or Reeian1ation, <br />9 antl Satety <br />Lyons Plant <br />P.0. Boa 529, Lyons, CO 60540. USA, (303) 823-2100, Fax (303) 832-2199 <br />