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11: <br />R~~,~,IYED <br />OCT `% 0 2001 <br />U vrs~on oz Ra SafaH n. <br />Mtnln9 and <br />October 25, 2007 <br />Ms. Tania Watson <br />Colorado Department of Public Health and Environment <br />Water Quality Control Division -Permits and Enforcemeni <br />4300 Cherry Creek Drive South <br />Denver, CO 80222-1530 <br />Phone: (303)692-3603 <br />RE: PERMIT CO-0036684; SEPTEMBER 2007 DMR SUBMITTAL <br />Dear Ms. Watson: <br />~~a~z~~ <br />Twentymile Coal Company <br />29516 Routt County Road # 27 <br />Oak Creek, Colorado 80467 <br />(970)879-3800 <br />Please find enclosed the above referenced discharge monitoring reports for the month of September 2007. Ouffalls 001A and <br />MON 1, and 001W (all the same site, a.k.a. site 62) flowed each week of the period. No permit limitation exceedences were <br />noted during the quarter. - <br />Quarterly Whole Effluent Toxicity (WET) testing for 001W was conducted at this site the week of September 10th. Results <br />indicate that the effluent was not toxic to fathead minnow or Ceriodaphnia dubia. Copies of laboratory test results are attached. <br />Please contact me directly at (970) 870-2750 for any further questions or additional information. <br />~- <br />Brian A. Watterson, R.G. <br />Geologist, Environmental Group <br />Twentymile Coal Company, <br />Enclosures <br />cc: DMG <br />CWPS Permit No. CO-0036684 file <br />