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NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) <br />DISCHARGE MONITORING REPORT (DMR) <br />PERMITTEE NAME/ADDRESS (Include Facility Name/Location if Different) <br />NAME: Oxbow Mining LLC <br />ADDRESS: PO Box 535 <br /> Somerset, CO 81424-0535 <br />FACILITY: SANBORN CRK & ELK CRK MINES <br />LOCATION: 3737 HIGHWAY 133 <br /> SOMERSET, CO 81434 <br />ATTN: James T. Cooper, EVP <br />000000132 014-A <br />PERMIT NUMBER DISCHARGE NUMBER <br />_ MONITORING PERIOD <br />MM/DD/YYYY MM/DD/YYYY <br />FROM 02/01/2010 TO 02/28/2010 <br />Form Approved <br />OMB No. 2040-0004 <br />DMR Mailing ZIP CODE: 81424-0535 <br />MINOR <br />GUNIS <br />SURF RUNOFF TO N FK GUNNISON R <br />External Outfall <br />No Discharge <br /> <br />QUANTITY OR LOADING <br />QUALITY OR CONCENTRATION <br />EX <br />NO. <br />EX <br />FREQUENCY <br />OF ANALYSIS <br />SAMPLE <br />TYPE <br />PARAMETER <br /> VALUE VALUE UNITS VALUE VALUE VALUE UNITS <br />pH SAMPLE .»». »„» <br /> MEASUREMENT <br />0040010 <br />Effluent Gross PERMIT <br />REQUIREMENT ",,,, 6.5 <br />MINIMUM •"•'• 9 <br />MAXIMUM SU <br />Monthly <br />INSITU <br />Solids, total suspended SAMPLE <br /> MEASUREMENT <br />0053010 PERMIT 35 70 mg/L <br />Effluent Gross REQUIREMENT 30DA AVG DAILY MX Monthly GRAB <br />Solids, settleable SAMPLE ....., .»,.. <br /> MEASUREMENT <br />005451 0 PERMIT Req. Mon. Req. Mon. mUL <br />Effluent Gross REQUIREMENT 30DA AVG DAILY MX Monthly GRAB <br />Iron, total (as Fe) SAMPLE ....„ <br /> MEASUREMENT <br />0104510 PERMIT ..,.,. 3000 6000 ug/L <br />Effluent Gross REQUIREMENT 30DA AVG DAILY MX Monthly GRAB <br />Oil and grease SAMPLE ....,, <br /> MEASUREMENT <br />0358210 PERMIT ,.,,.. """ """ 10 mg/L <br />Effluent Gross REQUIREMENT INST MAX Contingent GRAB <br />Flow, in conduit or thru treatment plant SAMPLE <br /> MEASUREMENT <br />500501 0 PERMIT Req. Mon. Req. Mon. MgaUd "'•" """ '••"" """ <br />Effluent Gross REQUIREMENT 30DA AVG DAILY MX Monthly INSTAN <br />Oil and grease visual SAMPLE ....„ <br /> MEASUREMENT <br />84066 1 0 PERMIT Req. Mon. Y=1;N=0 •'••" •""' • "'• »,,., <br />Effluent Gross REQUIREMENT INST MAX Monthly VISUAL <br />N MEfrITLEPRINCIPALE CUTIVEOFFICER I"?y.W,,p`n'eM?uwm tthisd ?cutandascar`uchnictir pmp,,W?"iyd?nn r <br />supervuion in actor gne dust qua personnc y gather and TELEPHONE DATE <br /> s-l- a the infurnsau- submnied. Based un my inquiry.f she person ur pttaons why nuuu gc Ibe <br />system, or dwse -ris directly usponsibk for gathering dw• info-Ii- the if,-6- wbmincd is <br />in dte ben .f my knowlcdge and bclrcf, trot. accwae, aM wmplne. 1 am aware Nat dote art significam <br /> <br />970 9a 9 -S?z Z <br /> <br />a 3 0 / ?D <br />V, s) p ?tifa sun nin ng r Is<Inr mwi?n, including m p?:abd y err and mpg u?em fur km wig <br />n SIGNA E OF PRINCIPAL EXECU OFFICER OR <br />TYPED OR PRINTED AUTHORIZED AGENT AREA Cady NUMBER MM/DD/YYYY <br />COMMENTS AND EXPLANATION OF ANY VIOLATIONS (Reference all attachments here) <br />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 LAA RP 4-5, AND <br /> I.A.2. P. 5 <br />FOR RQMNTS.TDS MONITORING-SEE PART VI.A.2.G OF RATIONALE. 30 DAY AVG. IS HIGHEST MONTHLY AVG. DURING PERIOD REPRTD. <br />EPA Forth 3320-1 (Rev.01106) Previous editions may be used. Page 1