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iii i~~iui~~ii~ii~i <br />999 <br />000 <br />Twentymile Coal Company <br />29515 Routt County Road p 27 <br />Oak Creek, Colorado 80467 <br />(970) 879-3800 <br />June 26, 2001 <br />Ms. Tania Watson <br />Colorado Department of Public Health and Environment <br />Compliance Monitoring and Data Management <br />Water Quality Control Division <br />4300 Cherry Creek Drive South <br />Denver, CO 80222-1530 <br />RE: PERMIT CO-0036684: 1'~ QUARTER 2001 DMR SUBMITTAL <br />Dear Ms. Watson: <br />RECEIVED <br />JUL 02 2001 <br />Division of Minerals 8 Geolpgy <br />Please find enclosed the above referenced discharge monitoring reports for the period from January 1, 2001 through March <br />31, 2001. The report was not submitted due to a misunderstanding of the submittal requirements precipitated by some <br />personnel changes here at the mine. This has been corrected and should not repeat itself in the future. On the positive side, <br />no permit limitation exceedences occurred during the period. <br />Quarterly Whole EfBuent Toxicity (WET) tests were conducted for Outfall 001 the week of March 27, 2001. This site passed <br />for both species, with "Concentrations with Statistically Significant Difference in Lethality" reported at 100% for P. Promelas <br />and >100% for C. Dubia. Copies of the CDPS WET Test Report Forms for both species are included with this submittal. <br />Outfall 001 is being tested for Hardness in addition to the required parameters. A copy of those results is included in this <br />submittal. <br />Please contact me at (970) 870-2712 for any further questions or additional information. <br />Sinc~erely~ ~~? <br />Richard Mills <br />Environmental Manager <br />File:l:\en\env\dmr\2001\36684\1'~ quarter dmr cl <br />