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_-. <br /> <br />L'-<<T ~2-os~ <br />Twentymile Coal Company <br />~ ~VE D 29515 Routt County Road # 27 <br />I® Oak Creek, Colorado 80467 <br />(970)879-3800 <br />JAN 3 0 2006 <br />Dim3~on ur +Ainerals anQ Geology <br />January 27, 2006 <br />Mr. Clyde Sharp <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-0042161; 4TH QUARTER 2005 DMR SUBMITTAL <br />Dear Mr. Sharp: <br />Please find enclosed the above referenced discharge monitoring reports for the period from October 1, <br />2005 through December 31, 2005, for Outtalls 001A (site 115), 002A (300E), and 3001. Outfall 001A <br />did not discharge during the period. Attached are blank DMRs for this Outtall with the No Discharge <br />box checked. <br />Wastewater Outtalls 002A and 3001 flowed each week of the period. A permit exceedance was noted, <br />under the 85 % BOD removal for 002A. Per our telephone conversation of January 25th, the reason for <br />this is that influent flow to the waste water treatment system includes significant greywater flow dilution <br />(i.e. boot cleaning, showers, sinks, floor drains, etc.). Influent BOD and TSS are often relatively low to <br />start with, thus, it is difficult to meet the minimum BOD % removal limitation. However, despite not <br />meeting the % BOD removal, the post treatment BOD, TSS, and fecal numbers are consistently low <br />(see DMRs). Last fall we hired Mr. Dick Bowman, a former head of the Grand Junction CDPHE to <br />trouble shoot our system. One of his recommendations was to seek a permit modification for the 85 <br />removal limit. We appreciate your email regarding that option (see attached). As suggested, we have <br />contacted Mr. Andrew Newhart of CDPHE (303-692-3655) regarding this issue. He suggested that we <br />submit a simple letter describing the situation and request an amendment to the permit, which he thinks <br />can be done relatively quickly. <br />P/l~ease~cr~onftact me directly at (970) 870-2750 if you wish to discuss this further. <br />Brian A. Watterson, P.G. <br />Geologist, Environmental Group, Twentymile Coal Company <br />Enclosures <br />cc.~~i7iG-' CWPS Permit No. CO-0042161 file <br />