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PERMITTEE NAME/ADDRESS (Include FacdityNamelLocation 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) C00000132 012 -A PERMIT NUMBER MONITORING PERIOD MM/DD/YYYY MM /DD/YYYY 12/01/2014 12131/2014 Form Approved OMB No. 2040 -0004 DMR Mailing ZIP CODE: 81424 -0535 MINOR GUNIS SEDIMENT POND TO ELK CREEK External Outfall No Discharge NAME /TITLE PRINCIPAL EXECUTIVE OFFICER I certify under penalty of law that thin document and all attachments "re prepared under my direction or TELEPHONE DATE supervision in accordance wM a system designed to assure that qualified personnel properly gather and /� luate the information submitted Based on my inquiry of the person or persons who manage the ' yt / I r L 1 D (� j system or those persons directly responsible for gathering the mformabon, the mformatwn =Med a • V • OO a� Q to the beat of my knovAedge and belief true, accurate and complete I am aware that Mere are /1 -q Zg —Sp0 6 f significant penalties for submitting false information including the possibility of fine and imprisonment to SIGNATURE OF AINCIPAL EXECUTIVE OFFICER OR TYPED OR PRINTED vowing violations AUTHORIZED AGENT AR -Code NUMBER MbDrMY 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.01106) 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 5005010 PERMIT Req. Mon. Req. Mon. MGD ` *' "" " '• " ** '•' *`" Monthly INSTAN Effluent Gross REQUIREMENT 30DA AVG DAILY MX Solids, total dissolved SAMPLE •' * "* ` "` «'* * " *" " * "* MEASUREMENT 7029510 PERMIT •"*•` `•"" •"•'• • " "' Req. Mon. Req. Mon. mg /L Quarterly GRAB Effluent Gross REQUIREMENT QRTR AVG DAILY MX NAME /TITLE PRINCIPAL EXECUTIVE OFFICER I certify under penalty of law that thin document and all attachments "re prepared under my direction or TELEPHONE DATE supervision in accordance wM a system designed to assure that qualified personnel properly gather and /� luate the information submitted Based on my inquiry of the person or persons who manage the ' yt / I r L 1 D (� j system or those persons directly responsible for gathering the mformabon, the mformatwn =Med a • V • OO a� Q to the beat of my knovAedge and belief true, accurate and complete I am aware that Mere are /1 -q Zg —Sp0 6 f significant penalties for submitting false information including the possibility of fine and imprisonment to SIGNATURE OF AINCIPAL EXECUTIVE OFFICER OR TYPED OR PRINTED vowing violations AUTHORIZED AGENT AR -Code NUMBER MbDrMY 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.01106) Previous editions may be used. 10/17/2013 Page 1