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PERMITTEE NAME/ADDRESS (include Facility Name/Locabon d Ddlerent) 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) CO 000132 007 -A M NU R DISCHARGENUMBER MONITORING PERIOD MMIDD/YYYY MM/DD/YYYY 05101/2014 05/31/2014 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 I certify under penally Of lawthat this document and all attachments ..ere prepared under my drrectan or TELEPHONE DATE supervann in accordance ram a system k,gned to assure mat quak ied personnel property gather and aluate the mfonmatwn submitted Based on my inquiry of the person or pensons who manage the WIC4 `{ 0 pj system or those persons d ,ecdy nesporsible for gathnmg the nformabon the mfcmvtion submitted to the best of my knowledge and belief true accurate and complete I am aware Thai there are �! G _ iP51(�! ti� sgmficart penalbes for submitting fake information including the possiMlty, or fine and imprisonment tar IGNATURE OF PRINCIPAL EXECUTIVE OFFICER OR /fu 92/- 5�3a G C aylzoi noNllg Vlplatipris TYPED OR PRINTED AUTHORIZED AGENT nREn c— I NUMBER 110111111FDONYYY COMMENTS AND EXPLANATION OF ANY VIOLATIONS (Reference all attachments here) TSS 8n 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 ROMNTS.TDS MONITORING -SEE PART VI.A.2.G OF RATIONALE. 30 DAY AVG. IS HIGHEST MONTHLY AVG. DURING PERIOD REPRTD. EPA Form 3320 -1 iRev.011061 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 Effluent Gross PERMIT REQUIREMENT "'•'• '+~'• • " "'•• 6.5 MINIMUM """ 9 MAXIMUM SU Monthly INSITU Solids, total suspended SAMPLE •• "" • »••• •••••• •• +••• MEASUREMENT 0053010 Effluent Gross PERMIT REQUIREMENT » ~« ` » «' • » ~' ' » "• 35 30DA AVG 70 DAILY MX mg /L Monthly GRAB 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 Effluent Gross PERMIT REQUIREMENT "• +« • " * "• "••" +`~" 3500 30DA AVG 7000 DAILY MX ug /L Monthly GRAB 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 8406610 Effluent Gross PERMIT REQUIREMENT » "» Req. Mon. INST MAX Y =1;N =0 •• » +• +. ~.• "...., . «+++ Monthly VISUAL NAMEITITLE PRINCIPAL EXECUTIVE OFFICER I certify under penally Of lawthat this document and all attachments ..ere prepared under my drrectan or TELEPHONE DATE supervann in accordance ram a system k,gned to assure mat quak ied personnel property gather and aluate the mfonmatwn submitted Based on my inquiry of the person or pensons who manage the WIC4 `{ 0 pj system or those persons d ,ecdy nesporsible for gathnmg the nformabon the mfcmvtion submitted to the best of my knowledge and belief true accurate and complete I am aware Thai there are �! G _ iP51(�! ti� sgmficart penalbes for submitting fake information including the possiMlty, or fine and imprisonment tar IGNATURE OF PRINCIPAL EXECUTIVE OFFICER OR /fu 92/- 5�3a G C aylzoi noNllg Vlplatipris TYPED OR PRINTED AUTHORIZED AGENT nREn c— I NUMBER 110111111FDONYYY COMMENTS AND EXPLANATION OF ANY VIOLATIONS (Reference all attachments here) TSS 8n 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 ROMNTS.TDS MONITORING -SEE PART VI.A.2.G OF RATIONALE. 30 DAY AVG. IS HIGHEST MONTHLY AVG. DURING PERIOD REPRTD. EPA Form 3320 -1 iRev.011061 Previous editions may be used. 10/17/2013 Page 1