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~ii~~~~u~tin~~~~~i <br />July 26, 2001 <br />Ms. Carla Lenkey <br />Colorado Department of Public Health and Environment <br />Water Quality Control Division -Permits and Enforcement <br />4300 Cherry Creek Drive South <br />Denver, CO 80222-1530 <br />000 <br />Twentymile Coal Company <br />29515 Routt County Road # 27 <br />Oak Creek, Colorado 80467 <br />(970)879-3800 <br />~'tt~ gn <br />RE: PERMIT CO-0042161:2""QUARTER 2001 DMR SUBMITTAL <br />Dear Ms. Lenkey: <br />RECEIVED <br />JUL 31 2001 <br />Division of Minerals b Geology <br />Please find enclosed the above referenced discharge monitoring reports for the period from April 1, 2001 through June 30, <br />2001. There were no permit limitation exceedences reported during this period. <br />Quarterly Whole Effluent Toxicity (WET) tests were conducted for Outfa11001 the week of May 22, 2001. This site passed for <br />both species, with "Concentrations with Statistically Significant Difference in Lethality" reported at 75% for P. Promelas and <br />75% for C. Dubia. Copies of the CDPS WET Test Report Forms for both species are included with this submittal. <br />Please contact me at (970) 870-2751 for any further questions or additional information. <br />Twentymile Coal Company <br />~. ~~~ ~~ . <br />Sandra White <br />enclosures <br />cc: (~ <br />CWPS Permit No. CO-0042161 fle <br />