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NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) <br />DISCHARGE MONITORING REPORT (DMR) <br />PERMITTEE NAME/ADDRESS (Include Facility NamelLocation 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 />000000132 012-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 ELK CREEK <br />External Outfall <br />ATTN: James T. Cooper, EVP <br />No Discharge <br /> <br />PARAMETER QUANTITY OR LOADING QUALITY OR CONCENTRATION NO. <br />EX FREQUENCY <br />OF ANALYSIS SAMPLE <br />TYPE <br /> VALUE VALUE UNITS VALUE VALUE VALUE UNITS <br />pH SAMPLE <br />MEASUREMENT <br />.... <br />„»» <br />..» <br />„». <br />• 0 <br />?? <br />t7 <br />?13J <br />/N51 <br />0040010 PERMIT """ "'•" """' 6.5 •'•»' 9 SU <br />Effluent Gross REQUIREMENT MINIMUM MAXIMUM Monthly INSITU <br />Solids, total suspended SAMPLE f <br /> MEASUREMENT »„„ „„» »»» ""• 2j 2 <br />3 n <br />?1A ' C <br />O <br />1 3J <br />(y1Lllp <br />0053010 PERMIT """ `•"" ""•' """ 35 70 <br />Effluent Gross REQUIREMENT 30DA AVG DAILY MX Monthly GRAB <br />Solids, settleable SAMPLE <br />MEASUREMENT ` <br />4 s', <br />?l). <br />?11! <br />d <br />1,3 J <br />6.14 6 <br />00545 1 0 <br />Effluent Gross PERMIT "`"' ""'• """ •""' Req. Mon. Req. Mon. mUL <br /> REQUIREMENT 30DA AVG DAILY MX Monthly GRAB <br />Iron, total (as Fe) SAMPLE ....,. <br /> MEASUREMENT 7 C u' , V l O 6 A <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 /> <br />""? v / 17 <br />6 r ?? <br /> <br />In <br />0358210 PERMIT """ """ ',,,,, „"" •"»` 10 mg/L <br />Effluent Gross REQUIREMENT INST MAX Contingent GRAB <br />Flow, in conduit or thru treatment plant SAMPLE <br />MEASUREMENT <br />Ll <br />N <br />1414 ,,,,,, ,,,,,, »?,•• ... <br /> <br />V <br /> <br />l j? <br /> <br />??SJ ry <br />50050 1 0 PERMIT Req. Mon. Req. Mon. Mgalld •""• <br />Efflu ent Gross REQUIREMENT 30DAAVG DAILY MX Monthly INSTAN <br />Solids, total dissolved SAMPLE ,,,,,, q <br />I <br /> MEASUREMENT AM 9Q Cn4(o <br />70295 1 0 <br />Effluent Gross PERMIT „"` q. Mon. mg/L <br /> REQUIREMENT G ILY MX Quarterly GRAB <br />NAMElTITLE PRINCIPAL EXECUTIVE OFFICER ° 'k` ydimam <br />supmtsmn in awordan« with a sly um dntgned w auux d qualified pawned pprnpoa <br />y gather and <br />f thot <br />cvduate the in("mution wb-,,.d <br />Hued w m <br />in <br />ui <br />i <br /> <br />?,? <br /> <br />TELEPHONE <br /> <br />DATE <br /> <br />%j 14 rVC0 <br />j <br />f , <br />y <br />q <br />ry o <br />e person or persons w <br />w vuoa <br />ge 0e <br />system, err those p- dirsxd, n,W-ibk for gdhering du: ini'-.n, the inf d°n submi. b. <br />dte best of my kmwle4,e awl belief, we, accmae, and wmpim. I am awue tha these arc gnifcant <br />Wu fw sub-..g W. mf.-i- including the p-bs ity of f- and imprisonment f? kwving <br />97 9z g -,f'/ z y <br />0 7 4 <br />41--PS-111 <br /> <br />TYPED OR PRINTED SIGNA E OF PRINCIPAL EXECUTI OFFICER OR <br /> AUTHORIZED AGENT AREA Cod. NUMBER MMIDD/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 <=10YR,24HR PRECIP EVENT;SETTLEABLE SOLIDS LIMIT MAY BE WAIVED FOR >10YR,24HR EVENT-SEE IA,I,PP 4-5, AND <br /> IA.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.01/06) Previous editions may be used. 11 Page 1