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PERMITTEE NAMEIADDRESS (Include FacilityNamelLocaSon if DlflerenO 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 I 007-A PERMITNUMBERDISCHARGE NUMBER MONITORING PERIOD MM/DD/YYYY MM/DD/YYYY 1 t/01 /2015 11/3112015 Form Approved OMB No. 2040-0004 DMR Mailing ZIP CODE: 81424-0535 MINOR GUNIS SEDIMENT POND TO HUBBARD CREEK External Outfall No Discharge 14 NAME/TITLE PRINCIPAL EXECUTIVE OFFICER I—tfy urufer+-14 of lew mn ms documem were prepared -der my arecbon or _P_ngs, acoordanee wta a system deaie"d to aasura Mt WW*d personnel properly gamer and TELEPHONE DATE evaluale aw mfermabon subrrsged eased on my matary of me person ar persona who manage the ft I K t? L k jo uS system. or mese penax drecdy resppo i&O* for gamerng IM mbrmehon, me mlermaW n aubmged m, Ur / /• 1 L L to me best of my trwMedge and bevel. am. a are, and complete. I am a .met mere ne 9 9-60 3♦ +/Zal P/`LSi�iQK+ srgafeantpenabsaferauMmlkgkbenformbon,mcb�rgthe posslbNyoffreandimprlsanmemhr SIGNA RE OF PRINCIPAL EXECUTIVE OFFICER OR 970' z TYPED OR PRINTED Fiat— AUTHORIZED AGENT7g Code NUMBER MM IDDIYYYY COMMENTS AND EXPLANATION OF ANY VIOLATIONS (Reference all attachmetyta 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 ROMNTS.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.01/06) 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 Effluent Gross PERMIT REQUIREMENT •••»• ••«« »'«• ••""' 35 30DA AVG 70 DAILY MX mg/L Monthly GRAB 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 •'•••• ""•« •••'•: ""'• 3500 7000 ug/L Monthly GRAB Effluent Gross REQUIREMENT 30DA AVG DAILY MX Oiland grease SAMPLE ""•"•• »•*•• •••••• •••'•• "•«•• MEASUREMENT 0358210 PERMIT '«••• »••"" •••-•" •••«• ««•" 10 mg/L Contingent GRAB Effluent Gross REQUIREMENT INST MAX Flow, in conduit or thru treatmenjpIa SAMPLE •'•••• ••«"• •••••• ••"•`• MEASUREMENT 500501 0 Effluent Gross PERMIT REQUIREMENT Req. Mon. 30DA AVG Req. Mon. DAILY MX MGD """" "'»» '•'•" *»•" Monthly INSTAN Oil and grease visual SAMPLE '«»' •'"""' '•`••• "`•••• '••••• MEASUREMENT 840661 0 Effluent Gross PERMIT REQUIREMENT "'••• Req. Mon. INST MAX Y=1;N=0 •"•'"' ""» ""'• "'•'• Monthly VISUAL NAME/TITLE PRINCIPAL EXECUTIVE OFFICER I—tfy urufer+-14 of lew mn ms documem were prepared -der my arecbon or _P_ngs, acoordanee wta a system deaie"d to aasura Mt WW*d personnel properly gamer and TELEPHONE DATE evaluale aw mfermabon subrrsged eased on my matary of me person ar persona who manage the ft I K t? L k jo uS system. or mese penax drecdy resppo i&O* for gamerng IM mbrmehon, me mlermaW n aubmged m, Ur / /• 1 L L to me best of my trwMedge and bevel. am. a are, and complete. I am a .met mere ne 9 9-60 3♦ +/Zal P/`LSi�iQK+ srgafeantpenabsaferauMmlkgkbenformbon,mcb�rgthe posslbNyoffreandimprlsanmemhr SIGNA RE OF PRINCIPAL EXECUTIVE OFFICER OR 970' z TYPED OR PRINTED Fiat— AUTHORIZED AGENT7g Code NUMBER MM IDDIYYYY COMMENTS AND EXPLANATION OF ANY VIOLATIONS (Reference all attachmetyta 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 ROMNTS.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.01/06) Previous editions may be used. 10/17/2013 Page 1