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a 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) 000000132 019-A R I U MONITORING PERIOD MM/DD/YYYY MM/DD/YYYY 07101/2014 07/31/2014 Form Approved OMB No 2040-0004 DMR Mailing ZIP CODE: 81424 -0535 MINOR GUNIS SURFACE RUNOFF TO HUBBARD CRK Extemal Outfall No Discharge IVI NAME /TITLE PRINCIPAL EXECUTIVE OFFICER 10ef9F/ under penalty of taw that this dowmem and aN attachments were prepared under my direction or TELEPHONE DATE supwmnn n cc accordance YAM a system designed to assure mat quahfied personnel properly gamer and A %fff��, �) ` A aluate the mformabon submitted Based on my inquiry of the person or persons wAo manage the G' ryl . L system a those persons directly responsible for gamemg the information. the No maoon subrtxaed ■, l V t r I t // to the beat of my krwwtedge and belief, true, —rate. and wmplate I am aware that mere are �y� 6 sy� a gnbcampenaltres for submi" false nfomadron, mciudngme possibility offna and impnsonmentfor SIGNATURE OF INCIPAL EXECUTIVE OFFICER OR / B 2u/ TYPED OR PRINTED owing manors AUTHORIZED AGENT -- I NUMBER M COMMENTS AND EXPLANATION OF ANY VIOLATIONS (Reference ail attachments here) TSS & TOTAL IRON LIMITS WILL BE WAIVED, AND SETTLEABLE SOLIDS LMT APPLIED FOR < 10,24HR 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 REPORTING PERIOD. EPA Form 3320 -1 (Rev.01106) Previous editions may be used. 1011712013 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 Solids, settleable SAMPLE •,••,, _'•,•, ,•__ "• •••••• MEASUREMENT 005451 0 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 pia it SAMPLE •••`•• • "'•' •• ~•` ••'••• MEASUREMENT 500501 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 NAME /TITLE PRINCIPAL EXECUTIVE OFFICER 10ef9F/ under penalty of taw that this dowmem and aN attachments were prepared under my direction or TELEPHONE DATE supwmnn n cc accordance YAM a system designed to assure mat quahfied personnel properly gamer and A %fff��, �) ` A aluate the mformabon submitted Based on my inquiry of the person or persons wAo manage the G' ryl . L system a those persons directly responsible for gamemg the information. the No maoon subrtxaed ■, l V t r I t // to the beat of my krwwtedge and belief, true, —rate. and wmplate I am aware that mere are �y� 6 sy� a gnbcampenaltres for submi" false nfomadron, mciudngme possibility offna and impnsonmentfor SIGNATURE OF INCIPAL EXECUTIVE OFFICER OR / B 2u/ TYPED OR PRINTED owing manors AUTHORIZED AGENT -- I NUMBER M COMMENTS AND EXPLANATION OF ANY VIOLATIONS (Reference ail attachments here) TSS & TOTAL IRON LIMITS WILL BE WAIVED, AND SETTLEABLE SOLIDS LMT APPLIED FOR < 10,24HR 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 REPORTING PERIOD. EPA Form 3320 -1 (Rev.01106) Previous editions may be used. 1011712013 Page 1