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PERMITTEE NAMEIADDRESS ( IndudeFadlity Name /LocationifDifferent) 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 009 -A PERMIT NUMBER DISCHARGE RUMBER MONITORING PERIOD MM/DD/YYYY MM/DD/YYYY 03/01/2015 03/31/2015 Form Approved OMB No. 2040 -0004 DMR Mailing ZIP CODE: 81424-0535 MINOR GUNIS SURF RUNOFF TO N FK GUNIS RIVR External Outfall No Discharge NAMERITLE PRINCIPAL EXECUTIVE OFFICER I- MN under penalty oflawthatthisdocumentandall attachmentswere preparedundermydirectionor TELEPHONE DATE supervision in accordance with a system desgned to assure that gmlifled personnel properly gather and A I Iuate the ottormaaan eubmRted 9ased on mY inquiry of the person or persons who manage the G 11�i' ( t-1 d�Al r 1 0 it system or those persons directly responsible for gathering the information, are mformaton anbmated a, _ to the beat of my imoWedge and belief. true, accurate, and complete. I am aware that there are 974- 9_/y - � X06 QC/ /0 "' sigMflcarit penePoes for submitting false Wormation. tncludlrg the possibrIttyof line ardimprisonmentfor SIGNATURE OF RINCIPALEXECUTIVEOFFICEROR knovVing TYPED OR PRINTED � AUTHORIZED AGENT AREA Code NUMBER MMIDDIYYYY 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 IA.1,PP 4 -5, AND I.A.2, P. 5 FOR RQMNTS.TDS MONITORING -SEE PART VIA.2.G OF RATIONALE. 30 DAY AVG. IF 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 "•`" `*"` "w """*" """ 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 300A 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 •'*"' •`""` '• "•" """ 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 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 30DA AVG DAILY MX NAMERITLE PRINCIPAL EXECUTIVE OFFICER I- MN under penalty oflawthatthisdocumentandall attachmentswere preparedundermydirectionor TELEPHONE DATE supervision in accordance with a system desgned to assure that gmlifled personnel properly gather and A I Iuate the ottormaaan eubmRted 9ased on mY inquiry of the person or persons who manage the G 11�i' ( t-1 d�Al r 1 0 it system or those persons directly responsible for gathering the information, are mformaton anbmated a, _ to the beat of my imoWedge and belief. true, accurate, and complete. I am aware that there are 974- 9_/y - � X06 QC/ /0 "' sigMflcarit penePoes for submitting false Wormation. tncludlrg the possibrIttyof line ardimprisonmentfor SIGNATURE OF RINCIPALEXECUTIVEOFFICEROR knovVing TYPED OR PRINTED � AUTHORIZED AGENT AREA Code NUMBER MMIDDIYYYY 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 IA.1,PP 4 -5, AND I.A.2, P. 5 FOR RQMNTS.TDS MONITORING -SEE PART VIA.2.G OF RATIONALE. 30 DAY AVG. IF HIGHEST MONTHLY AVG. DURING PERIOD REPRTD. EPA Form 3320 -1 (Rev.01106) Previous editions may be used. 10/17/2013 Page 1