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PERMITTEE NAME/ADDRESS (Indude Faulrty NamerLocabon 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 NUMBER DISCHARGE MONITORING PERIOD MWDDiYYYY MM/DD/YYYY 05101/2014 1 1 05/31/2014 Form Approved OMB No. 2040 -0004 DMR Mailing ZIP CODE: 81424-0535 MINOR GUNIS SEDIMENT POND TO ELK CREEK External Outfall No Discharge 1P NAMERITLE PRINCIPAL EXECUTIVE OFFICER I cenity under penalty of law that this document and all attachments Here prepared under my direction or supenrann in accordance with a system desgned to assure that queldled personnel property gather and aluate the Information submitted Based an my Ingwry of the person or persons who manage the system or those persons directly responsible for gatherag the mformabon the information submitted m to the best OI my knowledge and belief [rue accurate and complete I am aware that there are significant penalties for suarrio g take information Inctuai g the possibddy of line and Imprisonment for nowtng violations QUANTITY OR LOADING QUALITY OR CONCENTRATION NO. FREQUENCY SAMPLE PARAMETER AOEACiddsi I NUMBER MWD EX OF ANALYSIS TYPE VALUE VALUE UNITS VALUE VALUE VALUE UNITS pH SAMPLE ""•' • » *" * « «• • «•« MEASUREMENT 004001 0 PERMIT ... " "" 6.5 " "" g 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 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 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 it, MAX NAMERITLE PRINCIPAL EXECUTIVE OFFICER I cenity under penalty of law that this document and all attachments Here prepared under my direction or supenrann in accordance with a system desgned to assure that queldled personnel property gather and aluate the Information submitted Based an my Ingwry of the person or persons who manage the system or those persons directly responsible for gatherag the mformabon the information submitted m to the best OI my knowledge and belief [rue accurate and complete I am aware that there are significant penalties for suarrio g take information Inctuai g the possibddy of line and Imprisonment for nowtng violations /f / / • P0 �,�/� • —�J r l r TELEPHONE DATE LA e) Li 9�0 -9zy -.snob 0 O Zcy SIGNATURE OF P NCIPAL EXECUTIVE OFFICER OR AUTHORIZED AGENT TYPED OR PRINTED AOEACiddsi I NUMBER MWD COMMENTS AND EXPLANATION OF ANY VIOLATIONS (Reference all attachments here) TSS & TOTAL IRON LIMITS WILL BE WAIVED, AND SETTLEABLE SOLIDS LMT APPLIED FOR 1 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 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.01106) Previous editions may be used. 10117/2013 Page 1