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a.d d L.3JBTU Empire Corporation
<br />29515 Routt County Road # 27 ?. ,34?1J
<br />Oak Creek, Colorado 80467 ('0 C' ,. ,
<br />(970) 879-3800
<br />October 28, 2010 J
<br />Ms. Tania Watson
<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-0034142; BTU EMPIRE 3RD QUARTER 2010 DMR SUBMITTAL
<br />Dear Ms. Watson:
<br />Enclosed, please find the above referenced discharge monitoring report for the period July 1, 2010 through September 30,
<br />2010. Outfall 003A/003X flowed each week in July, and August, and only the first two weeks in September (due to a pump
<br />outage). Outfall-022A/022X-flowed each week-of July, and-only the first week-in August-before-going dry. Outfai1024A/024X
<br />did not flow during the period.
<br />One exceedance was noted for Outfall 022A (spoil springs), relating to the 30-day average limit for total recoverable iron
<br />during the first week in August. The site ceased flowing the following week, and has not resumed flowing until the last week in
<br />October. The October sample results are not yet available. BTU Empire is considering expanding the size of the
<br />sedimentation basin to allow more retention time for this discharge.
<br />In 2004, BTU Empire received approval from CDPHE to reduce the frequency of Whole Effluent Toxicity (WET) testing for
<br />Outfalls 003X, 022X, and 024X to an annual basis (a change from the previous quarterly basis). Annual chronic WET testing
<br />was performed during May of 2010. WET testing for Outfalls 003X and 022X tests indicated that the effluent was not acutely
<br />toxic to Daphnia magna or fathead minnow survival (see attached laboratory reports).
<br />Outfalls, 004A, 007A, 009A, 011A, 012A, 013A, 014A, 015A, 016A, 017A, 018A, 019A, 020A, 021A, 023A, and 024A/024X,
<br />along with Site 3001, did not discharge during this period. In order to reduce the amount of paper work, the following
<br />certification will be substituted for the actual DMR forms to cover the outfalls, which did not discharge.
<br />CERTIFICATION
<br />I certify under penalty of law that l have personally examined and am familiar with the information submitted herein; and
<br />based on my inquiry of those individuals responsible for obtaining the information, I believe the submitted information is
<br />true, accurate, and complete. /am aware that there are significant penalties for submitting false information, including the
<br />possibility of fine and imprisonment. See 18 U.S.C. § 1001 and 33 U.S.C. § 1319. (Penalties under these statutes may
<br />include fines up to $10,000 r aximum imprisonment of between 6 months and 5 years.)
<br />6,( and /o 0 As
<br />Brian A. Watterson, Geologist Dat
<br />Please contact me di ectly at (970) 870-2750 with any questions.
<br />Brian A. Watterson, P.G.
<br />Geologist, Environmental Group
<br />BTU Empire Corporation
<br />enclosures
<br />cc: DBMS, CDPS Permit No. CO-0034142 file
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