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PERMITTEE NAME/ADDRESS (Include FacMty Name/Loca6on if Different) NAME: Oxbow Mining LLC ADDRESS: PO Box 535 Somerset, CO 81434-0535 FACILITY: SANBORN CRK & ELK CRK MINES LOCATION: 3737 HIGHWAY 133 SOWRSET, CO 81434 ATTN: Mike Ludlow Exec VP NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) DISCHARGE MONITORING REPORT (DMR) 000000132 014-A PERMITNUMBEIR DISCHARGENU� MONITORING PERIOD MWDD/YYYY MWDD/YYYY 10/01/2013 10/31/2013 Form Approved OMB No. 2040-0004 DMR Mailing ZIP CODE: 81424 -0535 MINOR GUNIS SURF RUNOFF TO N FK GUNNISON R External Outfall No Discharge 1P COMMENTS AND EXPLANATION OF ANY VIOLATIONS (Reference all attachments here) TSS 8 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.01106) 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 004001 0 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 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 INST MAX COMMENTS AND EXPLANATION OF ANY VIOLATIONS (Reference all attachments here) TSS 8 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.01106) Previous editions may be used. 10/17/2013 Page 1