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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 017 -A PERMIT NU MB R DISCHARGE NUMBER MONITORING PERIOD MM/DD/YYYY MM/DD/YYYY 03/01 /2015 03/31/2015 DMR Mailing ZIP CODE: MINOR Form Approved OMB No. 2040 -0004 81424 -0535 GUNIS SURF RUNOFF TO N. FK GUNIS RIV External Outfall No Discharge NAME /TITLE PRINCIPAL EXECUTIVE OFFICER I -r* under penalty of lawtbat this tf c ant arid all attachments mm prepared under mydrrec'on or TELEPHONE DATE superwsmn in accordance w9N a system destnad to assure that quallfled personnel property gather and �/�(1 `rte O L{.l luate the information submitted Based on my mgWry at the person or persona who manage the / 4 ' t system or those person directly responsible for gatherdfg the information, the Information submttetl a K� �� to the beat of myknoWedgeand belief true. accurate, and cornplete.Iam aware Vat them are AIGNATUREOFPRINCIPALEXECUTIVEOFFICEROR 9Zy_ significant penalties for submtfhg false Information, including the posetbtty of fine and Imprisonment for TYPED OR PRINTED jimovang molattons AUTHORIZED AGENT AREA code NUMBER MMlDD /YNYV COMMENTS AND EXPLANATION OF ANY VIOLATIONS (Reference all attachments here) TSS & TOTAL IRON LIMITS WILL BE WAIVED, AND SETTLEABLE SOLIDS LMT APPLIES FOR — IOYR,24HR PRECIP EVENT;SETTLEABLE SOLIDS LIMIT MAY BE WAIVED FOR >10YR,24HR EVERT -SEE IA.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 RPTD 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 '••••• ••••"• w «sw. """ 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 0054510 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 702951 0 PERMIT "••"'" """` '*'*" "*"` Req. Mon. Req. Mon. mg /L Quarterly GRAB Effluent Gross REQUIREMENT QRTR AVG DAILY MX NAME /TITLE PRINCIPAL EXECUTIVE OFFICER I -r* under penalty of lawtbat this tf c ant arid all attachments mm prepared under mydrrec'on or TELEPHONE DATE superwsmn in accordance w9N a system destnad to assure that quallfled personnel property gather and �/�(1 `rte O L{.l luate the information submitted Based on my mgWry at the person or persona who manage the / 4 ' t system or those person directly responsible for gatherdfg the information, the Information submttetl a K� �� to the beat of myknoWedgeand belief true. accurate, and cornplete.Iam aware Vat them are AIGNATUREOFPRINCIPALEXECUTIVEOFFICEROR 9Zy_ significant penalties for submtfhg false Information, including the posetbtty of fine and Imprisonment for TYPED OR PRINTED jimovang molattons AUTHORIZED AGENT AREA code NUMBER MMlDD /YNYV COMMENTS AND EXPLANATION OF ANY VIOLATIONS (Reference all attachments here) TSS & TOTAL IRON LIMITS WILL BE WAIVED, AND SETTLEABLE SOLIDS LMT APPLIES FOR — IOYR,24HR PRECIP EVENT;SETTLEABLE SOLIDS LIMIT MAY BE WAIVED FOR >10YR,24HR EVERT -SEE IA.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 RPTD EPA Form 3320 -1 (Rev.01 106) Previous editions may be used. 10/17/2013 Page 1