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~,. <br /><~ p <br />((#y' ~R ,.Ya d M E1, {I,IyS~'p~. p A -~ C .6 ~ <br />J' ~ t3 t~~ i ~~ t9 F 6 J ~ ra y~l <br />y t'C ~i~ <br />t','~:E?~~*:'n',o-Tri%g~."ri'i*.;i4"~ sx_'f~s~k; ]:ir~1:.aPi'S''a ~~°Sid '4T~i33'. ~~`:'.._ <br />October 15, 2002 <br />Ms. Tania Watson <br />Colorado Department of Health, WQCD <br />Permits and Enforcement Section <br />WQCD-PE-B2 <br />4300 Cherry Creek Drive South <br />Denver, CO 80246-1530 <br />RECEIVED <br />OCT 2 ~ 2002 <br />pivision of Miner>Is and Geolo9" <br />Re: CDPS Permit No. 000000132, 3rd Quarter 2002 Discharge Monitoring <br />Reports, Oxbow Mining, L.L.C. <br />Dear Ms. Watson: <br />f;- <br />~,~: <br />~~v <br />Enclosed aze the 3rd Quarter 2002 Dischazge Monitoring Reports (DNB's) for Oxbow <br />Mining, L.L.C., Sanborn Creek and Elk Creek Mines (OMLLC). <br />The enclosed DMRs indicate the following issues and or exceedances. <br />Discharge Numbet 011 A and 011 W <br />Wet Testine <br />Note that while the DMR provides a place to record Acute Wet Testing for <br />Ceriodaphnia, a review of the Permit indicates there is no such monitoring <br />requirement. <br />OMLLC noted in the 2"a quarter 2002 DMR report that a sample was obtained on <br />July 8, 2002 to serve as the 2"d quarter effluent Wet Test sample. If available, an <br />additional 3`d quarter effluent sample was to have been obtained from outfa11011. <br />On September 18, 2002 an additional 3`d quarter sample was successfully <br />obtained. A copy of the Colorado -- CDPS Wet Test Report Form -Acute is <br />attached as required. Test results indicate that the effluent was not acutely toxic <br />to fathead minnow survival <br />Total Suspended Solids (TSS) <br />The flow from outfa11011 is intermittent and controlled by an underground float <br />and pump system. Because of the uncertainty of flows, samples are obtained <br />opportunistically. During the 3`d quarter OMLLC was successful in obtaining one <br />sample each month. While the August and September samples had total <br />suspended solids (TSS) levels of 19 mg/1 and <5 mg/1 respectively, the July <br />sample had a TSS level of 53 mg/1. OMLLC considers the July sample to be an <br />anomaly and not representative of the nature of the historic discharges from this <br />point. <br />3737 Hwy 133 P.O. Box 535 Somerset, Colorado 81434 USA <br />TEL (970) 929-5122 ~ FAX (970) 929-5177 <br />