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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 />I 000000132 007-A <br />PERMIT NUMBER DISCHARGE NUMBER <br />MONITORING PERIOD <br />MM/DD/YYYY MM/DD/YYYY <br />FROM 08/01/2010 TO 08/31/2010 <br />Form Approved <br />OMB No. 2040-0004 <br />DMR Mailing ZIP CODE: 81424-0535 <br />MINOR <br />GUNIS <br />SEDIMENT POND TO HUBBARD CREEK <br />External Outfall <br />No Discharge <br />ATTN: James T. Cooper, EVP <br /> QUANTITY OR LOADING QUALITY OR CONCENTRATION E OFEANALYSIIS STYPEE <br />PARAMETER <br /> VALUE VALUE UNITS VALUE VALUE VALUE UNITS <br />pH SAMPLE ,...» »»» ..... ».„, <br /> MEASUREMENT <br />00400 1 0 <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 />005451 0 PERMIT Req. Mon. Req. Mon. mUL <br />Effluent Gross REQUIREMENT 30DA AVG DAILY MX Monthly GRAB <br />Iron, total (as Fe) SAMPLE ....., <br /> MEASUREMENT <br />0104510 PERMIT 3500 7000 ug/L <br />Effluent Gross REQUIREMENT 30DA AVG DAILY MX Monthly GRAB <br />Oil and grease SAMPLE .„.„ <br /> MEASUREMENT <br />035821 0 <br />Effluent Gross PERMIT <br />REQUIREMENT """' ..».. • ?* „, INST 10 MAX mg/L Contingent GRAB <br />Flow, in conduit or thru treatment plant SAMPLE <br />..... <br />*..... <br />...... <br /> MEASUREMENT <br />500501 0 PERMIT Req. Mon. Req. Mon. MgaUd ••"`• "•"' """ ""'" <br />Effluent Gross REQUIREMENT 30DA AVG DAILY MX Monthly INSTAN <br />Oil and grease visual SAMPLE ..,.., <br /> MEASUREMENT <br />840661 0 PERMIT Req. Mon. Y=1;N=0 •"••' """ '••"' •"•" <br />Effluent Gross REQUIREMENT INST MAX Monthly VISUAL <br />AME/TITLEPRINCIPALEXECUTIVEOFFICER I-ifymMap-Ityoflawthtdusdocumemandallattachmeoh-prcq-duWd ydirectionor <br />supervuion in accorrLmu with a s rem deigned m assure that qualified perwnnel properly gather and TELEPHONE DATE <br /> <br /> <br />' t evahtale the informuion submitted. Bascd w my inq uy f the person or person who mawg We <br />W ,t or lase persons dimxtly resporuible for gathering the infonnetion, the inf Lion submitted b, <br />o M best Of my knOW Icdg< and belief ??, s um e, and mmplNC. I un aws a ha he e a e Signifi ant 7. <br /> <br />/ T I 9a4 - s z z <br /> <br />D 9 / 0 7 ?o <br />V t <br />eCa Iwuhies for subrm t.y (else informuion, ind.W.g the possibility of! and imprisonme, for ktawing <br />.;nletinna. <br />SIGNA E OF PRINCIPAL EXECU <br />TPA OFFICER OR <br />TYPED O PRINTED AUTHORIZED AGENT AREA Cad- NUMBER MMIDofYYYY <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.01106) Previous editions may be used. Page 1