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PERMITTEE NAME /ADDRESS (Include Facility Name /Location If Different) 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) 000000132 013 -A PERMIT NUMBER I DISCHARGE N MBER MONITORING PERIOD MM /DD/YYYY MM /DD/YYYY 01/01/2015 01/31/2015 Form Approved OMB No. 2040 -0004 DMR Mailing ZIP CODE: 81424 -0535 MINOR GUNIS :i1ML O = 12191M External Outfall No Discharge NAME /11TLEPRINCIPAL EXECUTIVE OFFICER I certify under penalty of law that this document and all attachments were prepared under my direction or ///�� TELEPHONE DATE supervision m accordance bm with a system designed on my inquiry to assure of t that person r persons who o properly manage aM / /' �` / /I' valuate the information submitted Based le my ath of the forma mr rso in who mono a the irl `('/_ -Jj (�J. 1 '(�I�// , N \ k O system or those persons directly responsible for gathering the information, the information submitted is �J ,, the best of my knowledge and belief true accurate and complete I am aware that there are s- r-t v�^J�X� sgnificant penalties for submitting false information including the possibility of fine and imprisonment for IGNATURE OF PRIN IPAL EXECUTIVE OFFICER OR aovnrg violations AUTHORIZED AGENT AREACode NUMBER MMIDDIYYYY 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 <= 10YR,24HR 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 RQMNTS.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.01 106) 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 pH SAMPLE .. ". *. ...... ... *.* ...... MEASUREMENT 0040010 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. mUL Monthly GRAB Effluent Gross REQUIREMENT 30DA AVG DAILY MX Iron, total [as Fe] SAMPLE ` « * "* * * * " ** . " *. «' • " * *' MEASUREMENT 0104510 PERMIT * * * * ** * * * * *" ` * * * ** * * * * ** 3000 6000 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 50050 1 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 NAME /11TLEPRINCIPAL EXECUTIVE OFFICER I certify under penalty of law that this document and all attachments were prepared under my direction or ///�� TELEPHONE DATE supervision m accordance bm with a system designed on my inquiry to assure of t that person r persons who o properly manage aM / /' �` / /I' valuate the information submitted Based le my ath of the forma mr rso in who mono a the irl `('/_ -Jj (�J. 1 '(�I�// , N \ k O system or those persons directly responsible for gathering the information, the information submitted is �J ,, the best of my knowledge and belief true accurate and complete I am aware that there are s- r-t v�^J�X� sgnificant penalties for submitting false information including the possibility of fine and imprisonment for IGNATURE OF PRIN IPAL EXECUTIVE OFFICER OR aovnrg violations AUTHORIZED AGENT AREACode NUMBER MMIDDIYYYY 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 <= 10YR,24HR 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 RQMNTS.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.01 106) Previous editions may be used. 10/17/2013 Page 1