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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 81434-0535 <br />FACILITY: SANBORN CRK & ELK CRK MINES <br />LOCATION: 3737 HIGHWAY 133 <br /> SOMERSET, CO 81434 <br />ATTN: James T. Cooper, EVP <br />000000132 012-A <br />PERMIT NUMBER DISCHARGE NUMBER <br />MONITORING PERIOD <br />MM/DD/YYYY MM/DD/YYYY <br />FROM 02/01/2011 TO 02/28/2011 <br /> <br />PARAMETER QUAN TITY OR LOADING Q UALITY OR CONC ENTRATION NO. FREQUENCY SAMPLE <br /> EX OF ANALYSIS TYPE <br /> VALUE VALUE UNITS VALUE VALUE VAL <br /> <br />pH UE UNITS <br /> SAMPLE <br /> MEASUREMENT "'•" "" "•"' -•••-• <br />0040010 <br /> <br />Effl PERMIT <br />••?• <br />•« <br />=_«» <br />uent Gross REQUIREMENT MINIMUM 9 SU <br /> <br />Solids <br />total sus <br />d <br />d MAXIMUM Monthly INSITU <br />, <br />pen <br />e SAMPLE <br /> MEASUREMENT '„"' `•"" """ •" •" <br />0053010 <br />Effl <br />t G PERMIT """ "•'•• e*'«- •«••• <br /> <br />uen <br />ross <br />REQUIREMENT 35 <br />30DA AVG 70 <br />D <br />mg/L <br /> <br />Solids <br />settleabl AILY MX Monthly GRAB <br />, <br />e SAMPLE <br /> MEASUREMENT ""'• """ "•"` '•'•" <br />0054510 <br /> <br />Ef PERMIT " <br />«„*' <br />« <br />•«__= <br /> <br />fluent Gross <br />REQUIREMENT Req. Mon. <br />0DA AVG Re. Mon. <br />DAILY <br />mLL <br /> <br />Iron <br />total (as Fe) MX Monthly GRAB <br />, SAMPLE <br /> MEASUREMENT <br />0104510 <br /> <br />Effl PERMIT <br />•" « <br />«.«. <br />'»`« <br />uent Gross REQUIREMENT 00 A 6000 <br />ug/L <br />Oil and <br />rease VG <br />3oD Y MX <br />DAIL Monthly GRAB <br />g SAMPLE <br /> MEASUREMENT ' »" """ """ •'••» - •-•• <br />0358210 <br /> <br />Effl PERMIT "»" "'••' •••-•• .«.« <br />' •'•` <br />uent Gross REQUIREMENT 10 <br />INST M mg/L <br /> <br />Flow, in conduit or thru treatment plant <br />SAMPLE AX Contingent GRAB <br /> MEASUREMENT ""'- •-•••• «_«. -„... <br />500501 0 <br /> <br />Effl PERMIT Req. Mon. Req. Mon. M aVd <br />g <br />•""• <br />uent Gross REQUIREMENT 30DA AVG DY MX """' """ <br /> <br />Oil and grease visual <br />SAMPLE Monthly INSTAN <br /> MEASUREMENT <br />84066 1 0 <br />Effl PERMIT Req. Mon. Y=1;N=0 E*-..* <br />uent Gross REQUIREMENT INST MAX <br />M <br />thl <br /> on <br />y VISUAL <br />ramt/ I I i Lt PRINCIPAL EXECUTIVE OFFICER 1era' muff PCealry of1mthat <br />thad101?OOra^d all an en,,,e„U ..'cm prcpa,ed mae, my dir xvunm <br />pe .wainaee aawimaa}}aemdeaigneam,.aveaa q rrmp<wmKlpmpelygatne ana TELEPHONE DATE <br />Ir- evaluam the in(urmuioa submiued. Baud uo my inquiry of the perwe ur persons whu nuonge the <br />• ryncm, m thane persona dircaly pon 6k fm pd-mg the info uuu, the iafomunan submitted m <br />he hest ofmy WowlMge end belie[ we, accurate, and complete. 1 am .ware that thve eR significant IZ9 07q 051,04-111 <br />L4-)(CC, P ies [aa submiuiog false infurmauun, including the pavibiliry of t c aM i, ,h. th nent f r Imuwing (i 7 ? {• <br />nolanom. <br />TYPED OR PRINTED penah SIG TORE OF PRINCIPAL EXECU VE OFFICER OR <br />AUTHORIZED AGENT. NUMBER MM/DDmvY <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 IA.1,PP 45, AND <br /> IA.2, P. 5 <br />FOR RQMNTS.TDS MONITORING-SEE PART VLA.2.G OF RATIONALE. 30 DAY AVG. IS HIGHEST MONTHLY AVG. DURING PERIOD REPRTD. <br />EPA Form 3320-1 (Rev.01/06) Previous editions may be used. <br />Form Approved OMB No. 2040-0004 <br />DMR Mailing ZIP CODE: 81424-0535 <br />MINOR <br />GUNIS <br />SEDIMENT POND TO ELK CREEK <br />External Outfall <br />No Discha e <br />k ? r <br />Page 1