Laserfiche WebLink
TRAPPER MINE" <br />December 4, 2012 <br />Mr. Jared Ebert <br />Environmental Protection Specialist <br />Colorado Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />Dear Mr. Ebert: <br />TRAPPER MININ INC. <br />REC EIVED <br />DEC 10 20 <br />pivision of R& Sam ation, <br />�inon9 <br />Re: Trapper Mining Inc., Permit No. C -81 -010, Technical Revision TR -110 <br />Water Monitoring Sampling and Frequency Update <br />Please find enclosed duplicate copies of permit revision TR -110. This revision includes new <br />tables and text pertaining to monitoring frequency for surface waters in accordance with <br />Trapper's renewed NPDES Permit CO- 0032115. The monitoring and sampling procedures <br />contained within Appendix Q have also been changed to reflect these new requirements. Tables <br />4.8 -11 and 4.8 -12 now reflect revised frequencies and sampling criteria on the monitoring <br />schedule. <br />During the renewal process of our new NPDES discharge permit several items changed from <br />previously required sampling frequencies and sites. <br />NPDES discharge sites 005 (Coyote Gulch), 013 (West Pyeatt Gulch), 014 (Far East Buzzard <br />Gulch), 015 (Grouse Gulch), and 016 (Sage Gulch) have been deemed to comply with Subpart H, <br />Western Alkaline Mine Coal Mining (40 CFR Part 434.82) and will no longer have effluent <br />limitations or monitoring frequencies applied to them. They will now have to meet the BMP's <br />for sediment control. The sediment retention impoundments will be left within these drainages to <br />comply with the requirements of Subpart H. <br />Outfall 012 (Deer Gulch) was removed entirely from the NPDES permit, as it is a small <br />watershed encompassing only Phase II and III reclamation. Trapper shall continue to conduct <br />quarterly impoundment inspections on this structure until full Phase III bond release is granted on <br />this watershed and impoundment. The area will be eligible in 2013. <br />The monitoring frequencies for all remaining outfalls have been reduced. Effluent flow and pH <br />monitoring frequencies have been reduced to monthly instead of weekly as was previously <br />required. TSS, Total Iron, and Settleable Solids will remain on a monthly cycle. Trapper <br />proposes to reduce its monitoring frequency to a monthly routine. Effluent flow and other field <br />parameters will only be taken during the monthly sampling of active outfalls. The constituents <br />outlined in table 4.8 -12 will be monitored as outlined to remain in compliance with the <br />requirements of DRMS. <br />WET Testing requirements have also been reduced. Applicable outfalls include 011, 017, 018, <br />020, 021, and 023. WET Testing will only be required if these outfalls discharge mine water. <br />P.O. Box 187 <br />Craig, Colorado 81626 (970) 824 -4401 <br />