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NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) DISCHARGE MONITORING REPORT DMR Form Approved ` OMB N F No. 2040 -0004 PERMITTEE NAME/ADDRESS (Include Facility Name/Location if Different) NAME: Oxbow Mining LLC C00000132 007 -A DMR Mailing ZIP CODE: 81424 -0535 ADDRESS: PO Box 535 PERMIT NUMBER DISCHARGE NUMBER MINOR Somerset, CO 81434 -0535 GUNIS FACILITY: SANBORN CRK & ELK CRK MINES MONITORING PERIOD SEDIMENT POND TO HUBBARD CREEK LOCATION: 3737 HIGHWAY 133 MWDD/YYYY MWDD/YYYY External Ouffall SOMERSET, CO 81434 0410112014 04/30/2014 No Discharge 0 ATTN. Mike Ludlow Exec VP PARAMETER pH SAMPLE QUANTITY OR LOADING QUALITY OR CONCENTRATION NO, EX FREQUENCY OF ANALYSIS SAMPLE TYPE VALUE VALUE UNITS VALUE VALUE VALUE UNITS MEASUREMENT 0040010 Effluent Gross Solids, total suspended PERMIT REQUIREMENT SAMPLE • *••*• * *• *•» • * *••* * *•• *+ •• „•. •. +.+, MINIMUM „ « «„ «« �••• 9 MAXIMUM SU Monthly INSITU MEASUREMENT 0053010 Effluent Gross Solids, settleable PERMIT REQUIREMENT SAMPLE * * » * *• * * * * ** •»+. +. *•• *•• . ++•,. _ : «.., „ «,„ „,,,« 35 30DA AVG 70 DAILY MX mg /L Monthly GRAB MEASUREMENT 0054510 Effluent Gross Iron, total [as Fej PERMIT REQUIREMENT SAMPLE `••••* * * *• *• ••• *•• *• * *•• ” *••* ••..,+ "`••` „ „,« Re Mon, 30DA AVG Re Mon. DAILY MX mUL Month y GRAB MEASUREMENT 010451 0 Effluent Gross Oil and grease PERMIT REQUIREMENT SAMPLE • *•• «« ••• *•• «,•, ++ • +• * *• « «,,,. „, « +, „,,,• „ „„ 30DA 3500 AVG „ « „• 7000 DAILY MX ug /L Monthly GRAB MEASUREMENT 0358210 Effluent Gross PERMIT REQUIREMENT • * » * ** • *•••+ ••• «„ „„„ „ «•„ 10 mg /L Contingent GRAB Flow, in conduit or thru treatment plat SAMPLE „�••• •y�•R• INST MAX MEASUREMENT „ „�• ” " " «” 500501 0 Effluent Gross Oil and grease visual PERMIT REQUIREMENT SAMPLE Req. Mon. 30DA AVG •• *• *• Req. Mon. DAILY MX MGD ••*••* „ „„ „•••* ,,,,•, •„ • „•*� Monthly INSTAN „�•�• MEASUREMENT ��••„ 8406610 PERMIT ••** *• Effluent Gross REQUIREMENT Req. Mon. Y =1;N =0 "'”" ” " *` • "•`* INST MAX onL Monthly ••• +•� y VISUA NAMEMTLE PRINCIPAL EXECUTIVE OFFICER I certify under penalty of law that the document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and / TELEPHONE DATE aluate the information submitted Based on my inquiry of the person or persons who manage the �j� V /l. �4, t[� �/ M 0 L system, or those persons directly responsible for gathering the information the nformabon submafed r r there are q/ � to the best of my knowledge and belief true accurate, and complete I am aware that i sgnRcant penalties for submitting false information including the postubikfy of fie and imprisonment r ZIGNATURE OF PRINCIPAL EXECUTIVE OFFICER OR TYPED OR PRINTED row g violations AUTHORIZED AGENT AREA code I NUMBER 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 Form 3320 -1 (Rev.01 /06) Previous editions may be used. 10/17/2013 Page 1