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IRIAIG Twentymile Coal Company 29515 Routt County Road # 27 Oak Creek, Colorado 80467 (970)879-3800 April 26, 2002 Ms. Cada Lenkey Colorado Department of Public Health and Environment Water Quality Control Division -Permits and Enforcement 4300 Cherry Creek Drive South Denver, CO 80222-1530 RE: PERMIT CO-OD27154: 1st QUARTER & March 2002 DMR SUBMITTAL Dear Ms. Lenkey: RECEIVED MAY 01 2002 Division of IJlinerals and Geology Enclosed, please find the above referenced March discharge monitoring report (DMR) for the period March 1, 2002 through March 31, 2002. During this period, only ponds A (Outtall 001), 8 (Ouffall 003), D (Outfall 005), and E (Ouffall 006) discharged to Foidel Creek. No permit excursions were noted for the December 2001 period. Outfalls 001, and 006 discharged each week of the period. Ouffalls 003 and 005 discharged during the weeks of March 110', 18'" ,and 25~". Note that monitoring personnel inadvertently listed a sample as being collected for Ouffall 005 on our NPDES tracking sheet (during the first week of the period), when there was actually no flow at that site. This error was not detected during the month, and as a result, only one sample was collected for Ouffall 005 during March instead of two. In reviewing the historical data, Outfall 005 has had no excursions during 2000, 2001, and through the first two months of 2002. In addition, two samples have been collected from 005 during April 2002, with analytical data indicating no excursions. As such, TCC is of the opinion that no significant environmental impact occurred at this site in March. A Quarterly Whole Effluent Toxicity (WET) test was conducted for Outfall 001 in January 2002. This test indicated that the effluent was acutely toxic to Daphnia magna survival. Accelerated WET testing was subsequently conducted in February. Two consecutive accelerated tests were determined to be acutely toxic to Daphnia magna survival. As a result, Either PTI or TIE testing will be performed within the second quarter of 2002. A Quarterly Whole Effluent Toxicity (WET) test was conducted in February, 2002 for Outfall 005. This test indicated that the effluent was not acutely toxic to Daphnia magna survival, therefore Outfall 005 is in compliance. Note that the preprinted DMR indicates acomposite-3 sample type, however this acute WET test only requires a single grab sample. Outfalls 002, 004, 007, 008, and 009 did not discharge; and therefore had no chemical tests during this period. Ouffall 020 has not been constructed yet; therefore there is no discharge to enable chemical testing to date. Points 010, 016 and 017 have been eliminated from this permit. In order to reduce the amount of paper work, the following certification will be substituted for the actual DMR forms to cover the outfalls, which did not discharge. CERTIFICATION 1 ceRify under penalty of law that I have personally examined and am familiar with the information submitted herein; and based on my inquiry of those individuals responsible for obfaining the information, I believe the submitted information is true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment. See 18 U.S.C. § 1001 and 33 U.S.C. § 1319. (Penalties under these statutes may include fines up to $10,000 and/or maximum imprisonment o/between 6 months and 5 years.) William Ivy, President Date Please contact me directly at (970) 870-2750 for any questions. ~~ Brian A. Watterson, Environmental Geologist, Twentymile Coal Company cc: DMG CWPS Permit No. CO-0027154 file