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PERMITTEE NAME/ADDRESS (Include Facility Name/Locadon d 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 I 007 -A PERMIT NU B DI R MONITORING PERIOD MM /DD/YYYY MM /DD/YYYY 12/01/2014 12/31/2014 Form Approved OMB No. 2040 -0004 DMR Mailing ZIP CODE: 81424 -0535 MINOR GUNIS SEDIMENT POND TO HUBBARD CREEK External Outfall No Discharge NAMEITITLE PRINCIPAL EXECUTIVE OFFICER Icartrfyunderpenalty oflawthatthisdocumentandallattachmentswerepreparedundermydirectionor A TELEPHONE DATE supervision in accordance wM a system designed to assure that qualthed personnel properly and r A ' / aluate the -formation submitted Based on my inquiry of the person or persons who manage the l /.e/ /L d [ k ogi system or those persons directly responsible for gathering the information, the information submitted is f i� to the best of my knovAedge and belief, true, accurate, and complete I am aware that there are 7Q • 9�r �O ?1i-C'S/ significant penalties tarsubmdbng false information including the possibilM of fine and imprisonment to SIGNATURE OF PR CIPAL EXECUTIVE OFFICER OR 9 TYPED OR PRINTED now+ng wolabuns AUTHORIZED AGENT nrten code I NUMBER MMIDD/YYYY 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 VIA.2.G OF RATIONALE. 30 DAY AVG. IS HIGHEST MONTHLY AVG. DURING PERIOD REPRTD. EPA Form 3320 -1 (Rev.01 106) Previous editions may be used. 10117/2013 Page 1 QUANTITY OR LOADING QUALITY OR CONCENTRATION NO. FREQUENCY SAMPLE PARAMETER EX OF ANALYSIS TYPE VALUE VALUE UNITS VALUE VALUE VALUE UNITS pHSAMPLE ...... ...... . *.. :* ...... 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 Effluent Gross PERMIT REQUIREMENT * * * * ** *'*"' " **** •****` Req. Mon. 30DA AVG Req. Mon. DAILY MX mUL Monthly GRAB 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 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 30DA AVG DAILY MX NAMEITITLE PRINCIPAL EXECUTIVE OFFICER Icartrfyunderpenalty oflawthatthisdocumentandallattachmentswerepreparedundermydirectionor A TELEPHONE DATE supervision in accordance wM a system designed to assure that qualthed personnel properly and r A ' / aluate the -formation submitted Based on my inquiry of the person or persons who manage the l /.e/ /L d [ k ogi system or those persons directly responsible for gathering the information, the information submitted is f i� to the best of my knovAedge and belief, true, accurate, and complete I am aware that there are 7Q • 9�r �O ?1i-C'S/ significant penalties tarsubmdbng false information including the possibilM of fine and imprisonment to SIGNATURE OF PR CIPAL EXECUTIVE OFFICER OR 9 TYPED OR PRINTED now+ng wolabuns AUTHORIZED AGENT nrten code I NUMBER MMIDD/YYYY 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 VIA.2.G OF RATIONALE. 30 DAY AVG. IS HIGHEST MONTHLY AVG. DURING PERIOD REPRTD. EPA Form 3320 -1 (Rev.01 106) Previous editions may be used. 10117/2013 Page 1