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NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) DISCHARGE MONITORING REPORT (DMR) PERMITTEE NAMEIADDRESS (Indude Facility Name/Locationi /Different) NAME: Oxbow Mining LLC ADDRESS: PO Box 535 Somerset, CO 81434 -0535 FACILITY: SANBORN CRK & ELK CRK MINES LOCATION: 3737 HIGHWAY 133 i SOMERSET. CO 81434 ATTN: Mike Ludlow Exec VP r 000000132 009 -A r PERMIT NUMBER DISCHARG NUMBER MONITORING PERIOD MM/DD/YYYY MWDD/YYYY k 1 12/01/2013 12/31/2013 G Form Approved OMB No. 2040 -0004 DMR Mailing ZIP CODE: 81424 -0535 MINOR GUNIS SURF RUNOFF TO N FK GUNIS RIVR External Outtall No Discharge Q 1 NAMEIT TLE PRINCIPAL EXECUTIVE OFFICER OeR1h under penalty of la" mat this oocument ana an adatltments supervrsgn in accordance -th a system designed to assn valuate the mlormauon suomitted Based on my ,nown, of system . or those persons directly responsible tot gathering to the best of my knowledge and oelref . true. accurate . and sgnihcam penalties for submitting arse information mclud ovang woam s QUANTITY 04 LOADING QUALITY OR CONCENTRATION NO. FREQUENCY SAMPLE PARAMETER EX OF ANALYSIS TYPE VALUE V UE UNITS VALUE VALUE VALUE UNITS pH SAMPLE •''••' " "'• " "" MEASUREMENT 0040010 PERMIT '•• *•• •• ••a••• 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 005451 0 PERMIT • "••' ' • " "` " "*' Req. Mon. Req. Mon. mUL Monthly GRAB Effluent Gross REQUIREMENT 30DA AVG DAILY MX Iron, total [as Fe] SAMPLE '••••' *• ••••" •••••• MEASUREMENT y 0104510 PERMIT ••••'• "'�• * •a` "• " "" 3500 7000 ug /L Monthly GRAB Effluent Gross REQUIREMENT f 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 DAIL MX Solids, total dissolved SAMPLE "• "' " • '•••" •••••- MEASUREMENT 70295 1 0 PERMIT •• "" •`• " "'* `•`••' Req. Mon. Req. Mon. mg /L Quarterly GRAB Effluent Gross REQUIREMENT 30DA AVG DAILY MX NAMEIT TLE PRINCIPAL EXECUTIVE OFFICER OeR1h under penalty of la" mat this oocument ana an adatltments supervrsgn in accordance -th a system designed to assn valuate the mlormauon suomitted Based on my ,nown, of system . or those persons directly responsible tot gathering to the best of my knowledge and oelref . true. accurate . and sgnihcam penalties for submitting arse information mclud ovang woam s were prepared under my d—t,on or that qualified personnel property gamer anol a person or persons who manage me information, the midrmation s—Med is mplete. I am —re that mere are the pons tArly of fine and imprisonment for j lir �n ,� ! - /� ✓J s , L 1 ✓ I �/ 1 TELEPHONE DATE ,n� (A u -t,.J� TYPED OR PRINTED 03 Z0� SIGNATURE OF PRINCIPAL EXECUTIVE OFFICER OR AUTHORIZED AGENT AREA Cod. I NUMBER M DD COMMENTS AND EXPLANATION OF ANY VIOLATIONS (Reference all attachments here) TSS & TOTAL IRON LIMITS WILL BE WAIVED, AND SETTLEABLE SOLIDS LMT PLIED FOR <= 10YR,24HR PRECIP EVENT;SETTLEABLE SOLIDS LIMIT MAYBE WAIVED FOR >10YR,24HR EVENT -SEE I.A.1,PP 4 -5, AND I.A.2, P. 5 FOR RQMNTS.TDS MONITORING SEE ART VI.A.2.G OF RATIONALE. 30 DAY AVG. IF HIGHEST MONTHLY AVG. DURING PERIOD REPRTD. EPA Form 3320.1 (Rev.01106) Previous editions may be used. 10/17/2013 Page 1