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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 81424-0535 <br />FACILITY: SANBORN CRK & ELK CRK MINES <br />LOCATION: 3737 HIGHWAY 133 <br /> SOMERSET, CO 81434 <br />ATTN: James T. Cooper, EVP <br />000000132 009-A <br />PERMIT NUMBER DISCHARGE NUMBER <br />MONITORING PERIOD <br />MM/DDIYYYY MM/DD/YYYY <br />FROM 05/01/2010 TO 05/31/2010 <br />Fonn Approved <br />OMB No. 2040-0004 <br />DMR Mailing ZIP CODE: 81424-0535 <br />MINOR <br />GUNIS <br />SURF RUNOFF TO N FK GUNIS RIVR <br />External Outfall <br />No Discharge <br /> QUANTITY OR LOADING QUALITY OR CONCENTRATION EX OF ANALYSIS STYPEE <br />PARAMETER <br /> <br /> VALUE VALUE UNITS VALUE VALUE VALUE UNITS <br />pH SAMPLE .».» ..».. _»»- •••-•- <br /> MEASUREMENT <br />004001 0 PERMIT "'»' ""'• "•"' 6.5 <br />MINIMUM - 9 <br />MAXIMUM SU Monthly INSITU <br />Effluent Gross REQUIREMENT <br />Solids, total suspended SAMPLE ..»» »». •»_•- •»-» <br /> MEASUREMENT <br />005301 0 PERMIT "' " -••-'- ---»• •--•-- 35 <br />AVG 70 <br />DAILY MX <br />mg/L <br />Monthly <br />GRAB <br />Effluent Gross REQUIREMENT <br />Solids, settleable SAMPLE ...... ...». .»». »».. <br /> MEASUREMENT <br />005451 0 PERMIT ...... ""•' """ """ Req. Mon. <br />30DA AVG Req. Mon. , <br />DAILY MX mUL Monthly <br />Y GRAB <br />Effluent Gross REQUIREMENT <br />Iron, total (as Fe) SAMPLE »_.» ..».- »-- »»• <br /> MEASUREMENT <br />0104510 PERMIT "••" •""' """ `____= 3500 <br />30DA AVG 7000 <br />DAILY Mx uglL Monthly <br />Y GRAB <br />Effluent Gross REQUIREMENT <br />Oil and grease SAMPLE »..» •»_.. .-.»_ _»_-- •»»- <br /> MEASUREMENT <br />03582 1 0 PERMIT ••»" "---' '»'-' ------ .••._. INST 10 MAX L Contingent GRAB <br />Effluent Gross REQUIREMENT <br />Flow, in conduit or thru treatment plant SAMPLE •»--• •••-•• •••••• ..... <br /> MEASUREMENT <br />50050 1 0 r, o IT <br />PEI Rea. Mon. Rea. Mon. Moal/d =»•» »"" ••»» ••»" __ <br />Effluent Gross REQUIREMENT 30DAAVG DAILY MX <br />Oil and grease visual SAMPLE ...... ...... •••»• ...... <br />•••» <br /> MEASUREMENT <br />840661 0 PERMIT Req. Mon. Y=1;N=0 """ ""« »•»' Monthly VISUAL <br />Effluent Gross REQUIREMENT INST MAX <br /> <br />INCIPAL EXECUTIVE OFFICER 1 certify undo pe ty of W. that this d=m and all atrachrnenN - prepared undo my di=tion or <br />lk,-d <br />i <br />h <br />hfi <br />d TELEPHONE DATE <br />NAME/TITLE PR p,nnrK <br />p??pery p <br />at yna <br />a <br />superv,aiani.-,d- hha,ya ?n ar ig-dm,:ma t <br />a.ahute the mfumution submittal. Baud - my ingmry of the p-n .r persons wlw mawgc the (? <br />t t/ <br />? <br />b <br />zw a <br /> <br />system. or those pnsow dimtN respwsible fm gathering the inf-fi the iv _noo submi-d L, <br />1 am aware that there arc significmit <br />leu <br />and w <br />d bchcf <br />tmc <br />axumu <br />f <br />k <br />l <br />d <br />h <br />b 1. <br />^ ?,ga •c? <br />f p <br />. <br />, <br />, <br />, <br />my <br />now <br />e <br />ge an <br />m t <br />e <br />- o <br />pe Mr. f sub,.r ip W. i f.- i... mluding the posstbiYty,fr ears -P.- frrknn. • GNATURE OF P INCIPAL EXECUTIVE OFFICER OR <br />AREA coa. <br />NUMBER <br />MMIDD/YYYY <br />TYPED OR PRINTED AUTHORIZED AGENT <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. IF HIGHEST MONTHLY AVG. DURING PERIOD REPRTD. <br />EPA Form 3320-1 (Rev.01106) Previous editions may be used. Page 1