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NATIONAL, POLLUTANT DISCHARGE ELIMINP ION 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 007-A <br />PERMIT NUMBER DISCHARGE NUMBER <br />MONITORING PERIOD <br />MM/DD/YYYY MM/DD/YYYY <br />FROM 03/01/2011 TO 03/31/20141 <br />Form Approved <br />OMB No. 2040-M4 <br />DMR Mailing ZIP CODE: 81424-0535 <br />MINOR <br />GUNIS <br />SEDIMENT POND TO HUBBARD CREEK <br />External Outfall <br />No Discharge <br />PARAMETER QUANTITY OR LOADING QUALITY OR CONCENTRATION N <br />O. FREQUENCY STM ?E <br /> E o <br />ANALYSIS <br /> <br /> VALUE VALUE UNITS VALUE VALUE VALUE UNITS <br />pH SAMPLE ..«« <br /> MEASUREMENT <br />00 <br />0 <br />4 <br />0 1 0 <br />Effluent Gross PERMIT 6.5 9 SU <br /> REQUIREMENT MINIMUM <br />MAXIMUM <br />Monthly <br />INSITU <br />Solids, total suspended SAMPLE .«.« <br /> MEASUREMENT <br />0 <br />053010 <br />Effluent Gross PERMIT """ """ '•"" 35 70 mg/L <br /> REQUIREMENT 30DA AVG DAILY MX Mont111y GRAB <br />Solids, settleable SAMPLE ,,,•,• <br /> MEASUREMENT <br /> <br />00545 1 0 <br />Effluent Gross PERMIT Req. Mon. Req. Mon. mUL <br /> REQUIREMENT 300A AVG DAILY MX Monthly GRAB <br />Iron, total (as Fe) SAMPLE ...... <br /> MEASUREMENT <br /> <br />0104510 <br />Effluent Gross PERMIT <br />... 3500 7000 ug/L <br /> REQUIREMENT 30DA AVG DAILY MX MoniNy GRAB <br />Oil and grease SAMPLE « <br />""" <br /> MEASUREMENT «•"' """ """ <br /> <br />0358210 <br />E <br />ffluent Gross PERMIT "' <br />• "`«' •«••• «.••• <br />10 <br />mgt <br /> REQUIREMENT a INST MAX Contingent GRAB <br />Flow, in conduit or thru treatment plant SAMPLE <br /> MEASUREMENT i """ """ •"•" •"••• <br /> <br />50050 1 0 PERMIT Req. Mon. Req. Mon. Mgal/d ""'• •-•«• ••-•« .««. <br />Effluent Gross REQUIREMENT 3 CPA AVG DAILY MX Monthly INSTAN <br />Solids, total dissolved SAMPLE ..„„ <br /> MEASUREMENT <br /> <br />70285 1 0 <br />Effluent Gross PERMIT """ """ •""• Req. Mon. Req. Mon, mg/L <br /> REQUIREMENT / 3oDA AVG DAILY MX QuadeAy GRAB <br />VAME/TITLEPRINCIPAL EXECUTIVE OFFICER <br /> <br />^ Icerofymdeprn,try"flavWathsdoeumrmadalauaclunmsuertpnparedudcrmyda-li <br />`vp" ?'°"'"'a°d- ith j m"aris"mm+ Owlquhhdpc-1pm"rhwther:a <br />rvaluste the infurmatim suhnined. ft d o" my N.ry of the <br />erson or <br />ersons <br />th <br /> <br />w? <br />TELEPHONE <br />DATE <br />Y1 <br />T s <br /> <br /> <br />X p <br />p <br />tttamge <br />e <br />systat, w those pv90m d; r; ws. 1. forgather d the inf ti fie int lion subh "ed u. <br />s best o(my Imowledgc and belier f, ttuc accurnu, . <br />and wmplete. f am aware rlw there arc si Ipuuwficent <br />W??rs subtn ring r tseliar mtar_ iucldmg the possibday.ff- a W imprir"nm<m r -g _ <br />,. Age <br />/]?D ?? - <br /> <br />?J <br /> <br /> <br />4 <br />1".5111 <br /> <br />TYPED PRINTED SIGNA E OF PRINCIPAL EXECUTI OFFICER OR <br /> AUTHORIZED AGENT AaeA Cad. NUMBER MM/DDlYYYY <br />cr1MMFNTS. A N n FYPI ANA17nN nC AWV vtnt <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 IA.1,PP 4-5, AND <br /> IA.2, P. 5. <br />FOR RQMNTS.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 />Pape 1 <br />