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The Pittsburg ~ Midway Coal Mining Co.. <br />A Chevron Company <br />Edna Mine • P.O. Box 178.Oak Creek • CO 80487 <br />Phone (970) 736-8111 . Fax (970) 136-2405 <br />January 21, 1998 <br />Permit CO-0032638 <br />Colorado Department of Health <br />WQCD-PE-B2 <br />4300 Cherry Creek Drive South <br />Denver, CO 80222-1530 <br />Dear SidMadam: <br />Enclosed are the Edna Mine's December 1997 water monitoring reports and the fourth Quarter <br />1997 Acute Whole Effluent Toxicity test results. <br />DMP 004 and 007 discharged during the month. DMP 001 had no discharge during the month. <br />All discharges from DMP 004 and DMP 007 during the monitoring period were within current <br />compliance criteria. <br />During this quarter's WET test cycle both of the two sites requiring acute testing had discharged. <br />Effluent samples from outfalls 004 and 007 were collected on November 4 for testing fathead <br />minnows and c. dubia. Samples from the outfalls showed no acute toxicity to the fathead <br />minnows nor the c. drrbia. Should you have any questions regarding these reports, please contact <br />me at (303) 930-4027. <br />Sincerely, <br />~~_~--~ <br />Brian D. Gontarek <br />Sr. Environmental Engineer <br />cc: U.S.E.P.A. <br />CDMG <br />