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PERM ITTEE 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) 000000132 015 -A PERMIT NUMBER DISCHARGE RUMBER MONITORING PERIOD MM /DD/YYYY MM /DD/YYYY 01/01/2015 01/31/2015 Form Approved OMB No 2040 -0004 DMR Mailing ZIP CODE: 81424 -0535 MINOR GUNIS DISCHARGE TO ELK CREEK External Outfall No Discharge NAMEITITLE PRINCIPAL EXECUTIVE OFFICER I certify under penalty of lawthat this document and all attachments were prepared under my direction or TELEPHONE DATE supervision in accordance wth a system designed to assure that qualrtied personnel properly 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 •' _ / r s 1 to the best of my knowledge and belief true accurate and complete I am aware that there are Spa Q (� (r il significant penalties for submitting false information including the possibility of fine and imprisonment for SIGNATURE OF P NCIPAL EXECUTIVE OFFICER J nomng violabons AUTHORIZED AGENT TYPED OR PRINTED 7 Code NUMBER M ID /YYYY COMMENTS AND EXPLANATION OF ANY VIOLATIONS (Reference all attachments here) 30 DAY AVERAGE IS HIGHEST MONTHLY AVERAGE DURING PERIOD REPORTED. OIL & GREASE - SEE LB.1.D. 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 ...... .. : +.. . +. + ++ . +. +.. 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 MX 7D AV 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 50050 1 0 PERMIT Req. Mon. Req. Mon. MGD ' * " *`" *• * * ** "` ~" " * * " ** Monthly INSTAN Effluent Gross REQUIREMENT 30DA AVG DAILY MX Oil and grease visual SAMPLE * * * * *• *' * *`* * " * * ** " " " " *" " " ~•• MEASUREMENT 840661 0 PERMIT '• *' ~• Req. Mon. Y =1;N =0 * * * * ** * * * * ** * *' *'* * *` *" Weekly VISUAL Effluent Gross REQUIREMENT INST MAX NAMEITITLE PRINCIPAL EXECUTIVE OFFICER I certify under penalty of lawthat this document and all attachments were prepared under my direction or TELEPHONE DATE supervision in accordance wth a system designed to assure that qualrtied personnel properly 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 •' _ / r s 1 to the best of my knowledge and belief true accurate and complete I am aware that there are Spa Q (� (r il significant penalties for submitting false information including the possibility of fine and imprisonment for SIGNATURE OF P NCIPAL EXECUTIVE OFFICER J nomng violabons AUTHORIZED AGENT TYPED OR PRINTED 7 Code NUMBER M ID /YYYY COMMENTS AND EXPLANATION OF ANY VIOLATIONS (Reference all attachments here) 30 DAY AVERAGE IS HIGHEST MONTHLY AVERAGE DURING PERIOD REPORTED. OIL & GREASE - SEE LB.1.D. EPA Form 3320 -1 (Rev.01106) Previous editions may be used. 10/17/2013 Page 1