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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 015-A <br />PERMIT NUMBER DISCHARGE NUMBER <br />MONITORING PERIOD <br />MM/DD/YYYY MM/DD/YYYY <br />FROM 04/01/2011 TO 04130/2011 <br />Forth Approved <br />OMB No. 2040.0004 <br />DMR Mailing ZIP CODE: 81424-0535 <br />MINOR <br />GUNIS <br />DISCHARGE TO ELK CREEK <br />External Outfall <br />No Discharge <br /> QUANTITY OR LOADING QUALITY OR CONCENTRATION EX OFF ANALYSIS STYPEE <br />PARAMETER <br /> VALUE VALUE UNITS VALUE VALUE VALUE UNITS <br />pH SAMPLE »»» »»» »,». .».» <br /> MEASUREMENT <br />0040010 <br />Effluent Gross PERMIT <br />REQUIREMENT <br />MINIMUM <br />MAXIMUM <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 />MX 7D AV mg1L Monthly <br />y GRAB <br />Iron, total (as Fe) SAMPLE _»,» »»» •.»» _»»» <br /> MEASUREMENT <br />0104510 PERMIT ,_"" 3000 <br />30DA AVG 6000 <br />DAILY MX U91L <br />Monthly <br />GRAB <br />Effluent Gross REQUIREMENT <br />Oil and grease SAMPLE <br /> MEASUREMENT <br />0358210 PERMIT 10 <br />INST MAX mg/L <br />Contingent <br />GRAB <br />Effluent Gross REQUIREMENT <br />Flow, in conduit or thru treatment plant SAMPLE ».... •»»• ».»_ ....» <br /> MEASUREMENT <br />500501 0 PERMIT Req. Mon. Req. Mon. MgaUd <br />Monthly <br />INSTAN <br />Effluent Gross REQUIREMENT 30DAAVG DAILY MX <br />Oil and grease visual SAMPLE »»,. .»»• .»». ,.»» •.»» <br /> MEASUREMENT <br />84066 1 0 PERMIT Req. Mon. Y=1;N=0 <br />I <br /> <br /> <br />eekly <br /> <br /> <br />ISUAL <br />I <br />Effluent Gross REQUIREMENT INST MAX <br /> <br />E/TITLEPRINCIP?LEXECUTIVEOFFICER 1 certify undo pesutry of law that this document and all -I menss were prepared undo my dirccdon or <br />supervsionma mdanewohasemdesigoedaassuethatq-i,f,.dprnoneelpmWlygatherand <br />.)) TELEPHONE DATE <br /> e.aluale the information subrmned <br />. Based on my inquiry of the pervm or persons who menage the <br /> system. m dense p,,,- d,-,I, responsible fm gathering inforrtrauon, orrtntion submincd is. <br />m the best of my knowledge and belief. t6c <br />and complete. l em a the ware in' dot drere are np,lircam <br />true, accuta¢ 9 9 2y/^? / / Z <br />I f's? <br />///O 6/// <br /> , <br />Penahic. for -beemmg false mfuress-. ineluding the possibility oft a and imprismen-, for knowing <br />s;olauom. SIGNA E OF PRINCIPAL EXECUTIV OFFICER OR <br /> <br />TYPED R PRINTED <br />AUTHORIZED AGENT AREA Code NUMBER MM/DD/YYYY <br />COMMENTS AND EXPLANATION OF ANY VIOLATIONS (Reference all attachments here) <br />30 DAY AVERAGE IS HIGHEST MONTHLY AVERAGE DURING PERIOD REPORTED. OIL 8 GREASE - SEE I.B.I.D. <br />EPA Form 3320.1 (Rev.01106) Previous editions may be used. Page t