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MINREC, INC, ANNUAL HYDROLOGIC REPORT PAGE 5 <br />Combined Dischar es to Meet CDPS Limits <br />October 12, 2002 <br /> Untreated Untreated Combined CDPS <br /> No. 1 Mine No. 3 Mine 84% - 16% Limits <br />Iron m I - Pd 0.12 0.78 0.226 0.431 <br />Iron mg/I 0.13 0.88 0.250 0.957 <br />WET TESTS <br />The discharge permit requires chronic Whole Effluent Toxicity (W ET) tests to be performed <br />on effluent from outfall 001. A two species chronic WET test using C. dubia and <br />Pimeohales promelas, fathead minnow, is required semi-annually during the second and <br />fourth quarters. A single species chronic WET test using C. dubia is required semi- <br />annually during the first and third quarters. <br />A two species chronic bioassay was performed two times (2"d and 4"'quarters) during the <br />year using C. dubia and Pimephales promelas, fathead minnow. A single species chronic <br />bioassay was performed two times (is` and 3`d quarters) during the year using C. dubia. <br />Results found the effluent demonstrated no toxicity to C. dubia or fathead minnow survival <br />in any concentration less than or equal to the instream waste concentration (IWC). <br />Discharge Monitoring Reports (DMRs) <br />DMRs are submitted quarterly to the Colorado Department of Health and Environment with <br />copies to the Division of Minerals and Geology and are included herein by reference. <br />