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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 009-A PERMIT NUMBER DISCHARGE NUMBER MONITORING PERIOD MM/DD/YYYY MMIDD/YYYY 07/01/2015 07/31/2015 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 l NAMEITITLEPRINCIPAL EXECUTIVE OFFICER I cenity under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance win a system designed to assure that qualified personnel pr=ty gather and valuate the information submitted Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering the information, the information submitted is to the best of my knowledge and belief true, accurate and complete I am aware that there are significant penances for submitting false information including the possibility offns and imprisonment for knowing wolanonsAUTHORIZED QUANTITY OR LOADING QUALITY OR CONCENTRATION NO. FREQUENCY SAMPLE PARAMETER SIGNATURE OF P INCIPAL EXECUTIVE OFFICER OR AGENT 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. mL/L 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 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 NAMEITITLEPRINCIPAL EXECUTIVE OFFICER I cenity under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance win a system designed to assure that qualified personnel pr=ty gather and valuate the information submitted Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering the information, the information submitted is to the best of my knowledge and belief true, accurate and complete I am aware that there are significant penances for submitting false information including the possibility offns and imprisonment for knowing wolanonsAUTHORIZED 'J 1 ` Ir N , 1 r lY , t TELEPHONE DATE TYPED OR PRINTED y SIGNATURE OF P INCIPAL EXECUTIVE OFFICER OR 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 <=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. IF HIGHEST MONTHLY AVG. DURING PERIOD REPRTD. EPA Form 3320-1 (Rev.01106) Previous editions may be used. 10/17/2013- Page 1