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PERM ITTEE NAME/ADDRESS (Include Facility Name /LocatfonifDifferent) NAME: Oxbow Mining LLC ADDRESS: PO Box 535 Somerset, CO 81434 -0535 FACILITY: SANBORN CRK & ELK CRK MINES LOCATION: 3737 HIGHWAY 133 SOMERSET, CO 81434 ATTN Mike Ludlow Exec VP NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) DISCHARGE MONITORING REPORT (DMR) C00000132 007 -A PERMIT NUMBER DISCHARGE NUMBER MONITORING PERIOD MM /DD/YYYY MM /DD/YYYY 01/0112015 01/31/2015 Form Approved OMB No. 2040 -0004 DMR Mailing ZIP CODE: 81424 -0535 MINOR GUNIS SEDIMENT POND TO HUBBARD CREEK External Outfall No Discharge NAMEITITLE PRINCIPAL EXECUTIVE OFFICER I certify under penalty of law that this clocumentand all attachments were prepared under my direction or TELEPHONE DATE supervision in accordance with a system designed to assure that qualified personnel properly gather and Will, valuate the information submitted Based on my inquiry of the person or persons who manage the �. / • ' �, �,,,r L' b(J system or those persons directly responsible for gathering the information the information submitted is INNA I ++ +III L+ to the best of my knowledge and belief true, accurate and complete I am aware that there are _a^ S 6 D� 0� ep sgnRicant peti for submitting fake information including the possibility of fine and imprisonment f SIGNATURE O RINCIPAL EXECUTIVE OFFICER OR 77 nowang wwlabons AUTHORIZED AGENT ARFla COde NUMBER MMIDD/YYYY TYPED OR PRINTED COMMENTS AND EXPLANATION OF ANY VIOLATIONS (Reference all attachments here) TSS & TOTAL IRON LIMITS WILL BE WAIVED, AND SETTLEABLE SOLIDS LMT APPLIED FOR 1 PRECIP EVENT,SETTLEABLE SOLIDS LIMIT MAY BE WAIVED FOR >10YR,24HR EVENT -SEE I A.1,PP 4 -5, AND I.A.2, P. 5 FOR ROMNTS.TDS MONITORING -SEE PART VI.A.2.G OF RATIONALE. 30 DAY AVG. IS HIGHEST MONTHLY AVG. DURING PERIOD REPRTD. EPA Form 3320 -1 (Rev.01 /06) Previous editions may be used. 10/17/2013 Page 1 QUANTITY OR LOADING QUALITY OR CONCENTRATION NO. FREQUENCY SAMPLE PARAMETER EX OF ANALYSIS TYPE VALUE VALUE UNITS VALUE VALUE VALUE UNITS pHSAMPLE * *.__. ..,_ *_ ...... MEASUREMENT 004001 0 PERMIT ` « "" * * * * "* * " * " *" 6.5 " * * * ** 9 SU Monthly INSITU Effluent Gross REQUIREMENT MINIMUM MAXIMUM Solids, total suspended SAMPLE «... +, ,..... ,,..,. . *. *.. MEASUREMENT 0053010 PERMIT * " *'* * + * + +* *.. + *` * * "'* 35 70 mg /L Monthly GRAB Effluent Gross REQUIREMENT 30DA AVG DAILY MX Solids, settleable SAMPLE " " * * ", •`•• *• ••,••, ,• *,•• MEASUREMENT 005451 0 PERMIT ` « * "« * * * * +* * * * * ** * * * * ** Req. Mon. Req. Mon. ni Monthly GRAB Effluent Gross REQUIREMENT 30DA AVG DAILY MX Iron, total [as Fe] SAMPLE MEASUREMENT 0104510 PERMIT * * * * ** * "' *' *` * * ** ` * *` *` 3500 7000 ug /L Monthly GRAB Effluent Gross REQUIREMENT 30DA AVG DAILY MX Oil and grease SAMPLE MEASUREMENT 0358210 PERMIT * * * * ** ' *` * ** * * * * ** * * * * ** ' * * * *' 10 mg /L Contingent GRAB Effluent Gross REQUIREMENT INST MAX Flow, In conduit or thru treatment plat SAMPLE MEASUREMENT 500501 0 PERMIT Req. Mon. Req. Mon. MGD « * « «" * *' * ** * " *'* • "' *' Monthly INSTAN Effluent Gross REQUIREMENT 30DA AVG DAILY MX Oil and grease visual SAMPLE MEASUREMENT 840661 0 PERMIT * * * + ** Req. Mon. Y =1,N =0 * + * * ** * * * * ** " * * * ** * * " " *` Monthly VISUAL Effluent Gross REQUIREMENT INST MAX NAMEITITLE PRINCIPAL EXECUTIVE OFFICER I certify under penalty of law that this clocumentand all attachments were prepared under my direction or TELEPHONE DATE supervision in accordance with a system designed to assure that qualified personnel properly gather and Will, valuate the information submitted Based on my inquiry of the person or persons who manage the �. / • ' �, �,,,r L' b(J system or those persons directly responsible for gathering the information the information submitted is INNA I ++ +III L+ to the best of my knowledge and belief true, accurate and complete I am aware that there are _a^ S 6 D� 0� ep sgnRicant peti for submitting fake information including the possibility of fine and imprisonment f SIGNATURE O RINCIPAL EXECUTIVE OFFICER OR 77 nowang wwlabons AUTHORIZED AGENT ARFla COde NUMBER MMIDD/YYYY TYPED OR PRINTED COMMENTS AND EXPLANATION OF ANY VIOLATIONS (Reference all attachments here) TSS & TOTAL IRON LIMITS WILL BE WAIVED, AND SETTLEABLE SOLIDS LMT APPLIED FOR 1 PRECIP EVENT,SETTLEABLE SOLIDS LIMIT MAY BE WAIVED FOR >10YR,24HR EVENT -SEE I A.1,PP 4 -5, AND I.A.2, P. 5 FOR ROMNTS.TDS MONITORING -SEE PART VI.A.2.G OF RATIONALE. 30 DAY AVG. IS HIGHEST MONTHLY AVG. DURING PERIOD REPRTD. EPA Form 3320 -1 (Rev.01 /06) Previous editions may be used. 10/17/2013 Page 1