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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 />I 000000132 016-A <br />PERMIT NUMBER DISCHARGE NUMBER <br />MONITORING PERIOD <br />MM/DD/YYYY MM/DD/YYYY <br />FROM 02/01/2011 TO 02/28/2011 <br />Form Approved <br />OMB No. 2040-0004 <br />DMR Mailing ZIP CODE: 81424-0535 <br />MINOR <br />GUNIS <br />SURFACE RUNOFF TO ELK CREEK <br />External Outfall <br />No Dischargg <br />PARAMETER QUANTITY OR LOADING QUALITY OR CONCENTRATION N <br />O. FREQUENCY SAMPLE <br /> E OF ANALYSIS TYPE <br /> <br /> VALUE VALUE UNITS VALUE VALUE VALUE UNITS <br />pH SAMPLE .,,,,, <br /> MEASUREMENT ??? <br /> <br />00400 1 0 <br />Effluent Gross PERMIT 6.5 •»'•' <br />M <br />SU <br /> REQUIREMENT MINIMUM MAXI <br />UM Monthly INSITU <br />Solids, total suspended SAMPLE <br /> MEASUREMENT <br />0053010 """ ' <br /> <br />Effluent Gross PERMIT """ ""`• 35 70 mg/L <br /> REQUIREMENT 30DA AVG DAILY MX Monthly GRAB <br />Solids, settleable SAMPLE <br />•»•» <br /> MEASUREMENT •"` """ <br />00 <br />545 1 0 <br />Effluent Gross PERMIT """ """ •'• Req. Mon. Req. Mon. mU/L <br /> REQUIREMENT 30DA AVG DAILY MX Monthly GRAB <br />Iron, total (as Fe) SAMPLE <br />»» <br /> MEASUREMENT . ?`„` `•"" <br />01045 1 0 .,"" <br /> <br />Effluent Gross PERMIT 3000 6000 u L <br /> REQUIREMENT 30DA AVG DAILY MX Monthly GRAB <br />Oil and grease SAMPLE ,,,,•, <br />»•' <br /> MEASUREMENT ? •"" "°"• `""" <br />0 <br />358210 <br />E <br />ffluent Gross PERMIT ... ••_••- <br />10 <br />mg /L <br /> REQUIREMENT INST MAX Contingent GRAB <br />Flow, in conduit or thru treatment plant SAMPLE <br /> MEASUREMENT <br /> <br />500501 0 PERMIT Req. Mon. Req. Mon. MgaVd •'•"• _»»• _»»• »..., <br />Effluent Gross REQUIREMENT 30DA AVG DAILY MX Monthly INSTAN <br />Oil and grease visual SAMPLE <br /> MEASUREMENT <br /> <br />84066 1 0 PERMIT Req. Mon. Y=1;N=0 '»•" **•»• ••» <br />Effluent Gross REQUIREMENT INST Monthly VISUAL <br />tS MEMITLE PRINCIPAL EXECUTIVE OFFICER wemnYuodaPcnalryoflaw tytthnd«umrntavddlau lo-w,mpnpmrdtmdamydircnionor DATE <br />1-1-m-d- Ah. y-dvngned ro-- th.r goahred perso 1 prmly Pd. _d TELEPHONE <br />evaluam the infotmaion svhmmed. Based on my inquiryof the person or persaos w!w mange the <br />XJ %A <br />syncm. or those a as do -r Y tesp-bic for gah g the iupfbrma jm the tofomueon Mgrs d t.. r..J"-_Y-?•i ?7o <br />'I o Rz C 2 t? ?t <br />s ?? `orfsubmitting Else inf unoal? mdud?he possibiltry off avd imprisonment for kmt g <br />pa t f 7 4-11 <br />L <br />t SIG TORE OF PRINCIPAL EXECU VE OFFICER OR <br />TYPED OR PRINTED AUTHORIZED AGENT utFA cos. NUMBER MMIDD/YYYY <br />COMMENTS AND EXPLANATION OF ANY VIOLATIONS (Reference all attachments here) <br />TSS 8 TOTAL IRON LIMITS WILL BE WAIVED, AND SETTLEABLE SOLIDS LMT APPLIED FOR <=10YR,24 HR PRECIP EVENT;SETTLEABLE SOLIDS LIMITS MAY BE WAIVED FOR >10YR,24HR EVENT-SEE I.A.1, PP 4-5, <br /> AND 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 RPTD. <br />EPA Form 3320-1 (Rev.e1/06) Previous editions may be used. <br />Page 1 <br />r