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STATE OF COLORADO <br />Bill Owens, Governor <br />Douglas H. Benevento, Executive Director <br />Dedicated to protecting and improving the health and environment of the people of Colorado <br />4300 Cherry Creek Dr. S. <br />Denver, Colorado 60246-1530 <br />Phone (303) 692-2000 <br />TDD Line (303) 691-7700 <br />Located in Glendale, Colorado <br />http J/www.cdphe.state.co. us <br />March 5, 2003 <br />Frank M. Self <br />Trapper Mining, Inc. <br />P.O. Box 187 <br />Craig, Colorado 81626 <br />RE: Request for Alternate Limits due to Snow Melt <br />For Outfa11002A <br />CDPS Permit No. CO-0032115, Moffat County <br />Dear Mr. Self: <br />RECENED <br />MAR 0 6 2003 <br />Division of Minerals and Geology <br />OF' e0( <br />i.`G - n'P <br />ye O <br />+~ 1Q: <br />Colorado Department <br />of PublicHealth <br />and Environment <br />This is in response to your letter dated January 24, 2003, in which you reported a noncompliance with total suspended solids <br />(TSS) effluent limits due to snow melt at Outfall 002A on December 3, 2002. Your letter described the pond as being <br />properly maintained and operated prior to the event and temperature charts were included demonsfrating a temperature <br />differential which resulted in snow melt during the sampling event. Sampling was conducted on December 3, 2002 at <br />approximately 9:30 a.m. at Outfa11002A. According to the temperature charts, the high was 48 degrees with a low of 23 <br />degrees on December 3, 2002. Your sediment ponds aze designed to contain a 10-year/24-hour precipitation event. The self- <br />monitoring data you provided on your Discharge Monitoring Report is shown below: <br />Reported Pemrit <br />Period Outfall Parameter Results Conditions <br />4Q02 002A TSS (mgA) 50 (30 day avg) 35 (30 day avg) <br />4Q02 002A TSS (mg/1) 94 (daily nix) 70 (daily mx) <br />Trapper Mining has demonstrated that dischazge occurred within 48 hours after measurable temperature differentials, <br />resuhing in snow melt, and thus a dischazge from Outfall 002A was beyond your confroL Therefore, we believe that Trapper <br />Mining Company qualifies for the less than or equal to a 10-year/24-hour precipitation alternate limit, thus waiving total <br />suspended solids. <br />If you have any further questions regazding this matter, please contact me at (303) 692-3603. <br />Sinc rel , ~ <br />Carla J. Lenkey <br />Water Quality P tection Section <br />WATER QUALITY CONTROL <br />Laboratory Services Division <br />8100 Lowry Blvd. <br />Denver, Colorado 80230-6928 <br />(303) 692-3090 <br />cc: Local Health Departrnent <br />Sim Chibrilo, D.E., WQCD <br />,/tom Kaldcnbach, DMG <br />MS-3 File <br />