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\, <br />.f <br />©~~ <br />Twentymile Coal Company <br />March 28, 2000 <br />Carla L,enky <br />Colorado Department of Public Health and Environment <br />Water Quality Control Division -Permits and Enforcement <br />4300 Cherry Creek Drive South <br />Denver, Colorado 80222-1530 <br />RE: Permit No. CO-0027154; February 2000 DMR Submittal <br />Daz Ms. Lenky: <br />RECEIVED <br />MAR 3 0 2000 <br />Division of Minerals 8 Geology <br />Enclosed, please find the DMR's for the month of February for the discharge points <br />covered by the above referenced permit. During the period only ponds A (point 001), B <br />(point 003) and E (point 006) dischazged to Foidel Creek. There is one excursion to <br />report during the period. The results for Pond B indicated that the 30 day average for TSS <br />is reported at 44.5 mg/I, which is above the permit limit of 30 mg/I. ~, <br />In reference to the excursion, the first sample was taken in early February and the results <br />were not received by TCC until late February. The results for TSS from the initial sample <br />was 70 mg/l, which is in compliance with the daily maximum limit. An additional <br />sample was taken on Febraury 29, 2000 and the TSS concentration for this sample was <br />reported at 19 mg/1. The thirty day average for the two samples for TSS is 44.5 mg/l. <br />The reasons for the elevated TSS concentration appears to be entraining solids in the <br />sampling process. The procedure was reviewed again with the sampler and it was <br />emphasized that the sampling container can not touch the bottom of the channel and stir <br />up the bottom sediments. Given the low flow from [he pond during the initial sampling it <br />was difficult to obtain the sample without touching the bottom of the channel. It is <br />planned to deepen the channel downstream of the flume so that the sample can be <br />obtained without disturbing the bottom. Given the fact that the second sample was below <br />both the daily maximum and thirty day average requirement the duration of the excursion <br />was short lived. Also, the March 6 sample for this point had a TSS concentration of 6 <br />mg/1, further indicating that the excursion is associated with a sampling problem. <br />No discharge occurred during the reporting period for Outfalls 002, 004, 005, 7, 008 <br />009. Outfall 020 has not been constructed as of this date. Points 010, 016 017 have <br />been eliminated from this permit. In order to reduce the amount of paper work, these <br />29515 ROUTT COUNTY ROAD p27, OAK CREEK, CO 80467 Phone: (970) 679-3800 Fax: (970) 879-8050 <br />