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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) C00000132 012 -A PERMIT NU MB R DISCHARGE NUMBER MONITORING PERIOD MM/DD/YYYY MM/DD/YYYY 03/01 12015 03/31/2015 Form Approved OMB No. 2040 -0004 DMR Mailing ZIP CODE: 81424 -0535 MINOR GUNIS SEDIMENT POND TO ELK CREEK External Outfall No Discharge NAMEITITLE PRINCIPAL EXECUTIVE OFFICER Ice' under penalty of law that this document and all attadureus" nr prepared under mymrecttonor TELEPHONE DATE supervmron m acoordance with a system designed to assure that quaff fed personnel properly gather and //�' 1 sate the mformabon submI ted. Based on my "Wry of the parson or persons who manage the � / y4 n Yo, k 0 system, or those parsons dndy respor WWe for gathmhrg the mformottom the Irdormetioh submitted is. 1 r _ �n 9 r.c� Y�� • i . r m the beat of my knowledge and belief, true, accurate, and complete. I am avme mat there are 9 /(/ - g`9— J O �{� -//6 4 agnmcant penames for armmosrg false mformanon, urWudurg ft poeslbuny of fine and imprisonment for SIGNATURE OF PRINCIPAL EXECUTIVE OFFICER OR km�mg `nmauons_ AUTHORIZED AGENT AREA code NUMBER MM/DOrrrry 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 RQMNTS.TDS MONITORING -SEE PART VIA.2.G OF RATIONALE. 30 DAY AVG. IS HIGHEST MONTHLY AVG. DURING PERIOD REPRTD. EPA Form 3320 -1 (Rev.01I06) 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 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 0054510 PERMIT **•••* '•'*"' '•***• *"*`•' Req. Mon. Req. Mon, mL/L 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 500501 0 PERMIT Req. Mon. Req. Mon. MGD '"'"" *"*""" "*"' "'""" Monthly INSTAN Effluent Gross REQUIREMENT 30DA AVG DAILY MX Solids, total dissolved SAMPLE "**** ****"" * *•• ** **•••• MEASUREMENT 702951 0 PERMIT • *•••• •••••• •*`••* *•*"" Req. Mon. Req. Mon. mg /L Quarterly GRAB Effluent Gross REQUIREMENT QRTR AVG DAILY MX NAMEITITLE PRINCIPAL EXECUTIVE OFFICER Ice' under penalty of law that this document and all attadureus" nr prepared under mymrecttonor TELEPHONE DATE supervmron m acoordance with a system designed to assure that quaff fed personnel properly gather and //�' 1 sate the mformabon submI ted. Based on my "Wry of the parson or persons who manage the � / y4 n Yo, k 0 system, or those parsons dndy respor WWe for gathmhrg the mformottom the Irdormetioh submitted is. 1 r _ �n 9 r.c� Y�� • i . r m the beat of my knowledge and belief, true, accurate, and complete. I am avme mat there are 9 /(/ - g`9— J O �{� -//6 4 agnmcant penames for armmosrg false mformanon, urWudurg ft poeslbuny of fine and imprisonment for SIGNATURE OF PRINCIPAL EXECUTIVE OFFICER OR km�mg `nmauons_ AUTHORIZED AGENT AREA code NUMBER MM/DOrrrry 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 RQMNTS.TDS MONITORING -SEE PART VIA.2.G OF RATIONALE. 30 DAY AVG. IS HIGHEST MONTHLY AVG. DURING PERIOD REPRTD. EPA Form 3320 -1 (Rev.01I06) Previous editions may be used. 10/17/2013 Page 1