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PERMITTEE NAME/ADDRESS (Include Facility Name/Location 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) 0000001;Rj 010 -A PERMIT NUI DISCHARGE RUIRBER MONITORING PERIOD MM/DD/YYYY MM/DD/YYYY 05/01/2014 05/31/2014 Form Approved OMB No. 2040-0004 DMR Mailing ZIP CODE: 81424 -0535 MINOR GUNIS SEDIMENT POND TO SANBORN CREEK External Outfall No Discharge P NAMEITITLE PRINCIPAL EXECUTIVE OFFICER I cendy under penalty of law that this document and all attachm.ehm were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel property gather and ' / r TELEPHONE DATE ,\ aluate the information submitted Based on my inquiry of the person or persone who manage the (� r V—.( system or those persons d —tly responsible for gathering the information, the information submitted s '/j / to the best of my knovAeoge am neliel true accurate and complete I am aware that there are i ✓/ 4 sgndrcant penattres for suomimng false information including du possibility of fine art) imprisonment for SIGNATURE OF PRINCIPAL EXECUTIVE OF OR TYPED OR PRINTED nowing violabons AUTHORIZED AGENT AnEa code NUMBER MM/DD/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 IA.1,PP 4 -5, AND I.A.2, P. 5 FOR ROMNTS.TDS MONITORING -SEE PART VIA.2.G OF RATIONALE. 30 DAY AVG. IS HIGHEST MONTHLY AVG. DURING PERIOD REPRTD. 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 DAILY MX Solids, settleable SAMPLE `• * *•• `•'• *' `•' * *` • *• »• MEASUREMENT 005451 0 Effluent Gross PERMIT REQUIREMENT "• *'• ' ~' *' ` ~'~ ' ~•~ Req. Mon. 30DA AVG Req. Mon. DAILY MX mL/L 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 Effluent Gross PERMIT REQUIREMENT .... "• ~• • ~••• " ~~ 10 INST MAX mg /L Contingent GRAB 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 I REQUIREMENT •'••~ Req. Mon. INST MAX Y =1;N =0 ' ~ ~• • ~'~ ""~ • ~ ~• Monthly VISUAL NAMEITITLE PRINCIPAL EXECUTIVE OFFICER I cendy under penalty of law that this document and all attachm.ehm were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel property gather and ' / r TELEPHONE DATE ,\ aluate the information submitted Based on my inquiry of the person or persone who manage the (� r V—.( system or those persons d —tly responsible for gathering the information, the information submitted s '/j / to the best of my knovAeoge am neliel true accurate and complete I am aware that there are i ✓/ 4 sgndrcant penattres for suomimng false information including du possibility of fine art) imprisonment for SIGNATURE OF PRINCIPAL EXECUTIVE OF OR TYPED OR PRINTED nowing violabons AUTHORIZED AGENT AnEa code NUMBER MM/DD/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 IA.1,PP 4 -5, AND I.A.2, P. 5 FOR ROMNTS.TDS MONITORING -SEE PART VIA.2.G OF RATIONALE. 30 DAY AVG. IS HIGHEST MONTHLY AVG. DURING PERIOD REPRTD. EPA Form 3320 -1 (Rev.01106) Previous editions may be used. 10/17/2013 Page 1