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999 <br />000 <br />iii iiiiiiiuiiiiiii <br />999 <br />Twenlymile Coal Company <br />29515 Routt County Road # 27 <br />Oak Creek, Colorado 80467 <br />(970)879-3800 <br />January 25, 2002 <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 B ry <br />RE: PERMIT CO-0042161: 4th QUARTER 2001 DMR SUBMITTAL <br />Dear Ms. Lenkey: <br />RECEIVED <br />JAN 3 0 2002 <br />Division of Minerals and Geala9y <br />Please find enclosed the above referenced discharge monitoring reports for the period from October 1, 2001 through <br />December 31, 2001. No permit limitation exceedences were reported during this period. <br />Quarterly Whole Effluent Toxicity (WET) tests were conducted for Outfall 001 beginning the week of November 26, 2001. Test <br />results indicated that the effluent was toxic to the survival of fathead minnows and C. dubia at concentrations greafer than 50% <br />effluent concentration. Thus, the site was not in compliance. On December 11, 2001, at the suggestion of Mr. Chris Gates of <br />CDPHE, TCC sent CDPHE a letter requesting relief from initiating accelerated or PTI/TIE testin°_ This request was based <br />upon an April 2001 TCC request to substitute a%u'Te~ETiesting or Daphnia magna only as opposed to chronic two species <br />testing. While CDPHE was considering this request, TCC initiated accelerated testing per current permit requirements. The <br />chronic accelerated test did not pass. In late December 2001, Mr. Gates left a message indicating relief would be granted. As <br />such, the_ n Win- ap_ ding rhrQaic WET test data has been entered mto the DMR, but has not been enterers an exceedence. <br />Copies of the CDPS WET Test Report Forms are included with this submittal. <br />In a subsequent conversation between myself and Mr. Gates in early January 2002, CDPHE asked that additional WET testing <br />be conducted, using the acute test for Daphnia magna only. A WET test sample was submiried to the laboratory on January <br />8, 2002. TCC has recently received these results. Unfortunately, this test indicated that the effluent was acutely toxic to <br />Daphnia magna. OuHall 001 has not been discharging since January 14, 2002 due to low flows on receiving creeks. TCC will <br />initiate accelerating tesTna as soon as oossbT.-Cop"Tes o e-fI~DPS acute WET Tesl Report Fonns are included with this <br />submittal. This latest data will be entered in the next quarterly DMR. <br />Please contact me directly at (970) 870-2750 for any questions. <br />Twentymile Coal Company <br />.~.t.~,f~. ~ ~~~n~~ <br />Brian A. Watterson, <br />Environmental Geologist <br />enclosures <br />cc: OMG <br />CWPS Permit No. CO-0034142 file <br />