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RAG <br />April 26, 2002 <br />REC <br />MAY p ~ Y002 <br />Division of Minerals and GeoloBY <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 />RE: PERMIT CO.00421G1: 1st QUARTER 2002 DMR SUBMITTAL <br />Dear Ms. Lenkey: <br />A~~'~~ <br />~Atv <br />S ~''`` <br />Please find enclosed the above referenced discharge monitoring reports for the period from January 1, 2002 through March <br />31, 2002. No permit limitation exceedences were reported during this pedod. Note that Outfail OOt discharged during the first <br />two weeks of January, did not discharge in February, and began to discharge during the last 3 days in March. Outfall 002 <br />flowed only during the last week in January, and every other subsequent week of the quarter. <br />Please note that in a December 2001 telephone conversation between Chris Gates and myself, it was agreed that TCC would <br />initiate single species acute WET testing for Ouffall 001 beginning in 2002, in lieu of two species chronic testing. This was <br />based upon based upon the same approval for single species acute testing under permit CO-0027154, and an earlier April <br />2001 request from TCC. <br />A Quarterly Whole Effluent Toxicity (WET) test was collected for acute testing at Outtall 001 on January 7, 2002. Test results <br />indicated that the effluent was acutely toxic to Daphnia magna survival. Discharge stopped at Ouffall 001 shortly thereafter, so <br />that accelerated testing could not be initiated. When discharge began again at the end of March, another sample was <br />collected on March 31, 2002 and submitted for standard acute WET testing. Test results indicated that the effluent was not <br />toxic to the survival of Daphnia magna. A WET test sample was also collected in April (the beginning of the second quarter of <br />2002). This test also indicated that the efFluent was not toxic to the survival of Daphnia magna. Thus, two consecutive tests <br />have passed for Ouffall 001. In our telephone conversation of April 15t", it was agreed that no further accelerated testing <br />would be necessary. In the future, TCC will conduct accelerated testing as appropriate instead of standard WET testing. <br />Note that a modified DMR sheet for reporting the single species WET test results has been used pending our receipt of new <br />replacement DMRs. <br />Please contact me directly at (970) 870-2750 for anv ouestions- <br />Twentymile Coal Company <br />~. ~r ~~~ <br />Brian A. Watterson, <br />Environmental Geologist <br />enclosures <br />cc: DMG <br />CWPS Permit No. CO-0034142 file <br />•....... Y ............................................................. <br />M review found the above-referenced report(s) in compliance <br />with the following CDMG Regulations: <br />4.05.13(2)(a)(iii) -Timely submittal of DMRs to <br />CDMG. <br />4.05.13 (2)(a)(ii) -Timely reporting to CDMG of any <br />ezceedances of effluent limiiaiions. <br />4.05.1(3) -Compliance with Federal and State water <br />quality laws that pertain to discharges of surface <br />water. <br />Tom Kaldenbach <br />Environmental Protection Specialist Date: <br />Twentymile Coal Company <br />29515 Routt County Road # 27 <br />Oak Creek, Colorado 80487 <br />(970)879-3800 <br />pF COO <br />~w = ~ 9 <br />„F,e / 90 <br />+ + <br />w <br />'~ l876 ~ <br />oivrrtoa ae <br />MINERALS <br />-L-- <br />e~oLOev <br />MEwii, 4itai kii <br />