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PERMITTEE NAME/ADDRESS (include Facility Name/Locabon 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 012 -A PERMIT MONITORING PERIOD MM /DD/YYYY MM/DD/YYYY 07/01/2014 07/31/2014 Fonn Approved OMB No. 2040 -0004 DMR Mailing ZIP CODE: 81424 -0535 MINOR GUNIS SEDIMENT POND TO ELK CREEK External Outfall No Discharge NAMEr11TLE PRINCIPAL EXECUTIVE OFFICER t --" under penalty 11 taw that MB dowmem and ag atfatldmends were prepared under my median or aupe —on st —dame wdh a system dmgned to assure Mat quabfied personnel property gamer and ate the mformabon submdted Based on my tmlwry of the person or persons wslo manage the QUANTITY OR LOADING QUALITY OR CONCENTRATION NO. FREQUENCY SAMPLE PARAMETER EX OF ANALYSIS TYPE VALUE VALUE UNITS VALUE VALUE VALUE UNITS pHSAMPLE NUMBER ...... ...... 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. IS HIGHEST MONTHLY AVG. DURING PERIOD REPRTD. EPA Fonn 3320 -1 (Rev.01/06) Previous editions may be used. MEASUREMENT Page t 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 0054510 PERMIT •""' «'•'•' •' **•' '• " *• Req. Mon. Req. Mon. mUL Monthly GRAB Effluent Gross REQUIREMENT 30DA AVG DAILY MX 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 500601 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 '•••" "•"" ••••" '•"" Monthly VISUAL Effluent Gross REQUIREMENT INST MAX NAMEr11TLE PRINCIPAL EXECUTIVE OFFICER t --" under penalty 11 taw that MB dowmem and ag atfatldmends were prepared under my median or aupe —on st —dame wdh a system dmgned to assure Mat quabfied personnel property gamer and ate the mformabon submdted Based on my tmlwry of the person or persons wslo manage the N..(' ( TELEPHONE DATE (, G (� �• system, or Mose persons directly responsdAs for gamermg Me mformabon, me mtormabon submlted m, to the best of my knowledge and beset, true, acc Irate, and complete 1 am aware mat Mere are (7� �. �J[ W sWftant Demme for submding false mtarmabon, mdduang the poaeddhty of fine and dmpnsonmerd for ni;woiaaons SIGNATURE OF PRINCIPAL EXECUTIVE OFFICER OR AUTHORIZED AGENT TYPED OR PRINTED MREncoae NUMBER MMfDDrrm 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. IS HIGHEST MONTHLY AVG. DURING PERIOD REPRTD. EPA Fonn 3320 -1 (Rev.01/06) Previous editions may be used. 1011712013 Page t