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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 03/01/2011 TO 03/31/2011 <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 Discharg? <br />PARAMETER QUANTITY OR LOADING QUALITY OR CONCENTRATION O. OFFREEQUUEENCYY S MPE E <br /> VALUE VALUE UNITS VALUE VALUE VALUE UNITS <br />Oil and grease visual SAMPLE ,,.,,, <br /> <br />MEASUREMENT ,«... ...«. <br />'•"" <br />'•' •• <br />8406610 <br />Effluent Gross PERMIT Reeqq. Mon. Y=1;N=0 «•'*• ••«'• «•••• »...• <br /> <br />REQUIREMENT <br />INST MAX y <br />Month) <br />VISUAL <br />VCIPAL EXECUTIVE OFFICER 1 e "ry ondes P-hy of Is. rh., his doe""""r and all auachmcnrs en prcperod under my di-ion or <br />nPervnion in seeordance with a ystem designed m more ha q ebhea persuvul Pmpedy ga ner and <br />evaluare he int riw mbmiued. esxd on my inquiry of the <br />erwn ur <br />e <br />wb <br />h TELEPHONE DATE <br /> p <br />p <br />rwns <br />o manage <br />e <br />ys em o hose pe sons dimzly nsponsiblc for gmhering he infomu M he iformafion sub mined is <br />/ <br />s <br />' . <br />m d. best of my knowledge and belief. true, securme, sod eomplere. I am aware hm there are si icsm <br />llim f <br />b <br />i <br />tm <br />fd <br />c 4?? <br />9 - S? Z z o <br />S/ <br /> <br />Y( <br />I <br />Pos <br />so <br />m <br />r <br />a <br />c inf uon. including The possibility of fine and imprisonment f r <br />ins <br />SIGNA 7 T/o <br />11 <br /> <br />ED R PRINTED E OF PRINCIPAL EXECUTI OFFICER OR <br /> AUTHORIZED AGENT AneACoa. NUMBER MWDD/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 <=1 OYR,24HR PRECIP EVENT;SETTLEABLE SOLIDS LIMIT MAY BE WAIVED FOR >10YR,24HR EVENT-SEE IA.1,PP 4-5, AND <br /> I.A.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.01106) Previous editions may be used. <br />Page 2