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NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) <br />DISCHARGE MONITORING REPORT (DMR) <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 />ATTN: James T. Cooper, EVP <br />000000132 010-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 />PARAMETER QUANTITY OR LOADING <br />VALUE VALUE UNITS <br />Oil and grease visual SAMPLE ,,,,,. <br />MEASUREMENT <br />84066 1 0 PERMIT Req. Mon. Y=1;N=C <br />Effluent Gross REQUIREMENT INST MAX <br />QUALITY OR CONCENTRATION <br />VALUE VALUE VALUE <br />Form Approved <br />OMB No. 2040-0004 <br />DMR Mailing ZIP CODE: 81424-0535 <br />MINOR <br />GUNIS <br />SEDIMENT POND TO SANBORN CREEK <br />External Outfall <br />No Discharge P <br />NO. I FREQUENCY I SAMPLE <br />EX OF ANALYSIS TYPE <br />UNITS <br />Monthly VISUAL <br />N MEJ77TLE PR NCIPAL EXECUTIVE OFFICER cify undo prnalry of lawthat ,bisd-wat and Al amchments wets prryurW under my duetionm <br />supcnmtsion m accerdanx with a n designed m ascurc thu qualified petaonnN psoperiy g„het a„a TELEPHONE DATE <br />V 't evaluate the in( ion submiucd. Based on my iaqutryof the perwn or persons who mono <br />system, or those pmons diroNy rtspomible Cm gathering the iof tier,, the inf tion submitted u. <br />-P- toesunc? beet 4n ,nd belief,n, <br />true. eccutatc, -P- 1 am ,hat tere areh cignifia0icanl /r ?O rf G rw 1' O / la /' <br />c( a pl,ia [o' r submming ing falfaseinformatio mGudtng,he p,ssibibn• ut f e aM impriwnment for ng ?+ 7 ? (/ <br />TYPED OR PRINTED evnen'. SIGNAT E OF P NCIPAL EXE FFI ER OR <br />AUTHORIZED AGENT wnEwcod. NUMBER MWDD/vYYY <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 I.A.1,PP 4-5, AND <br /> I.A.2, P. 5 <br />FOR ROMNTS.TDS MONITORING-SEE PART VI.A.2.G OF RATIONALE. 30 DAY AVG. IS HIGHEST MONTHLY AVG. DURING PERIOD REPRTD. <br />EPA Form 3320.1 (Rev.01/06) Previous editions may be used. <br />Page 2