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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 014-A <br />PERMIT NUMBER DISCHARGE NUMBER <br />MONITORING PERIOD <br />MM/DD/YYYY MM/DD/YYYY <br />FROM 04/01/2011 TO 04/30/2011 <br />Form Approved <br />OMB No. 2040-0004 <br />DMR Mailing ZIP CODE: 81424-0535 <br />MINOR <br />GUNIS <br />SURF RUNOFF TO N FK GUNNISON R <br />External Outfall <br />No Discharge <br /> <br /> <br /> <br />ARAMETER QUANTITY OR LOADING QUALITY OR CONCENTRATION E <br />NO. <br />X <br />? <br /> <br />FREQUENCY <br />OF ANALYSIS <br /> <br />SAMPLE <br />TYPE <br /> VALUE VALUE UNITS VALUE VALUE VALUE UNITS <br />pH SAMPLE ...... ..»» ...». ...... <br /> MEASUREMENT <br />0040010 PERMIT 6.5 ~'~• 9 SU <br />Effluent Gross REQUIREMENT MINIMUM MAXIMUM Monthly INSITU <br />Solids, total suspended SAMPLE <br /> MEASUREMENT <br />0053010 PERMIT ...... ""`" '•"" .,"" 35 70 mg/L <br />Effluent Gross REQUIREMENT 30DA AVG DAILY MX Monthly GRAB <br />Solids, settleable SAMPLE ,,.,,, <br /> MEASUREMENT <br />00545 1 0 PERMIT """ "" " "' "•"'• Req. Mon. Req. Mon. mL/L <br />Effluent Gross REQUIREMENT 30DA AVG DAILY MX Monthly GRAB <br />Iron, total (as Fe) SAMPLE <br /> MEASUREMENT <br />0104510 PERMIT 3000 6000 ug/L <br />Effluent Gross REQUIREMENT 30DA AVG DAILY MX Monthly GRAB <br />Oil and grease SAMPLE <br /> MEASUREMENT <br />0358210 PERMIT ...... ».... .».» .~.,. ...... <br />10 <br />mglL <br />Effluent Gross REQUIREMENT INST MAX Contingent GRAB <br />Flow, in conduit or thru treatment plant SAMPLE .,.,., <br /> MEASUREMENT ~~ """ <br />50050 1 0 PERMIT Req. Mon. Req. Mon. Mgal/d "<'*_ ~•~• •_<»- ....« <br />Effluent Gross REQUIREMENT 30DAAVG 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 />ME/TITLEPRINCIPALLEXECUTIVEOFFICER I"r"r' "d°p-ky°fI.. d.`dmdo-sod°11a"a`t-is-prpi d ndCfmyd"""°"°r <br />superv m in -.4- with a systun designed a auurc Jut qualified persom,el properly gathtt and <br />evalwt <br />th <br />u <br />t <br />i <br />b <br />ori d <br />h <br />B <br />d <br />f <br /> <br />?a- TELEPHONE DATE <br />NJ L% VV--O e <br />e <br />s <br />- t <br />on m <br />t <br />o <br />. <br />ase <br />°a my utquiry o <br />e person or t><rswu who mmutge the <br />system, or those pawns dire,.zly mponsibic for gath i,g the infornotion, d, intomulion subnuu d is. <br />to the beat of knowledge and bchef, accuse, and complete. 1 am aw that ?Mre are significant <br />, • Q <br />9zo ! Z 9 - I2 <br />?/? S // <br />?f p ?ti?(or sub ubmining Glse inf°muti°n,i. includwg the pussibiliry °(( a and impriwnment for knowing <br /> <br />n SIGNAT E OF PRINCIPAL EXECUTIV OFFICER OR <br />TYPED OR PRINTED AUTHORIZED AGENT AREA cod. NUMBER MMIOD/YYYY <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 /> 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. Page 1