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NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) <br />DISCHARGE MONITORING REPORT (DMR) <br />Forth Approved <br />OMB No. 2040-0004 <br />PERMITTEE NAME/ADDRESS (Include Facility Name/Location if Different) <br />NAME: Oxbow Mining LLC <br />ADDRESS: PO Box 535 <br />Somerset, CO 81434-0535 <br />FACILITY: SANBORN CRK & ELK CRK MINES <br />LOCATION: 3737 HIGHWAY 133 <br />SOMERSET, CO 81434 <br />000000132 014-A <br />PERMIT NUMBER DISCHARGE NUMBER <br />MONITORING PERIOD <br />MM/DD/YYYY MM/DD/YYYY <br />FROM 12/01/2010 TO 12/31/2010 <br />DMR Mailing ZIP CODE: 81424-0535 <br />MINOR <br />GUNIS <br />SURF RUNOFF TO N FK GUNNISON R <br />External Outfall <br />ATTN: James T. Cooper, EVP <br />No Discharge <br /> <br />QUANTITY OR LOADING <br />QUALITY OR CONCENTRATION <br />EX <br />NO. <br />? <br />FREQUENCY <br />OF ANALYSIS <br />SAMPLE <br />TYPE <br />PARAMETER <br /> VALUE VALUE UNITS VALUE VALUE VALUE UNITS <br />pH SAMPLE .»». »»„ ...,., .«». <br /> MEASUREMENT <br />0040010 <br />Effluent Gross PERMIT <br />REQUIREMENT 6.5 <br />MINIMUM 9 <br />MAXIMUM SU <br />Monthly <br />INSITU <br />Solids, total suspended SAMPLE <br /> MEASUREMENT <br />0053010 <br />Effluent Gross PERMIT <br />REQUIREMENT 35 <br />30DA AVG 70 <br />DAILY MX mg/L <br />Monthly <br />GRAB <br />Solids, settleable SAMPLE <br /> MEASUREMENT <br />0054510 <br />Effluent Gross PERMIT <br />REQUIREMENT Req. Mon. <br />30DA AVG Req. Mon. <br />DAILY MX mL/L <br />Monthly <br />GRAB <br />Iron, total (as Fe) SAMPLE <br /> MEASUREMENT <br />0104510 <br />Effluent Gross PERMIT <br />REQUIREMENT 3000 <br />30DA AVG 6000 <br />DAILY MX ug/L <br />Monthly <br />GRAB <br />Oil and grease SAMPLE <br /> MEASUREMENT <br />0358210 <br />Effluent Gross PERMIT <br />REQUIREMENT 10 <br />INST MAX mg/L <br />Contingent <br />GRAB <br />Flow, in conduit or thru treatment plant SAMPLE <br /> MEASUREMENT <br />50050 1 0 <br />Effluent Gross PERMIT <br />REQUIREMENT Req. Mon. <br />30DA AVG Req. Mon. <br />DAILY Mx Mgal/d Monthly INSTAN <br />Solids, total dissolved SAMPLE „«« <br /> MEASUREMENT <br />70295 1 0 <br />Effluent Gross PERMIT <br />REQUIREMENT »»» Req. Mon. <br />QRTR AVG Req. Mon. <br />DAILY Mx mg/L <br />Quarterly <br />GRAB <br />N ME/TITLEPRI CIPAL ECUTIVEOFFICER lmcmfywrdapenafy fla dwIhisdocu - Wall an¢hmrn -pn,7-dumlcmydi--m <br />wp_i- in -r&- wth It s>'stem designed w assure that quahfkd p-V orozrlY gather ad TELEPHONE DATE <br />I. <br />V'%- <br />! 1 du mformadun submined. Based on my mqutry fib, Krum m pm- whu manage the <br />Ws m dax penmen di,-* responsibk fur gadrcring the m1mnm uoq the mfotaurion submitted I. <br />w dx ben of my knowledge a? belief hue, accmue, aM Ine. l em aware thu d+e.e art signifimam <br />` <br />?D T J s l <br />ell-1-6-11 <br />// <br />L? y • rt•5l ct??.x ?b?ny mfr and mtpnson , t kn-.g <br />lr aub m to g rake nt m"mn m`md °g h` pu: <br />nma <br />SIGNA E OF PRINCIPAL EXECUTI OFFICER OR <br />TYPED OR PRINTED AUTHORIZED AGENT AREA Cod. NUMBER MMIDD/YYYY <br />COMMENTS AND EXPLANATION OF ANY VIOLATIONS (Reference all attachments here) <br />TSS & TOTAL IRON LIMITS WILL BE WAIVED, AND SETTLEABLE SOLIDS LMT APPLIED FOR <=10YR,24HR PRECIP EVENT;SETTLEABLE SOLIDS LIMIT MAY BE WAIVED FOR >10YR,24HR EVENT-SEE IA1,PP 4-5, AND <br /> IA2, P. 5 <br />FOR RQMNTS.TDS MONITORING-SEE PART VI.A2.G OF RATIONALE. 30 DAY AVG. IS HIGHEST MONTHLY AVG. DURING PERIOD REPRTD. <br /> <br />EPA Form 3320.1 (Rev.01106) Previous editions may be used. Page 1