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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 010-A <br />PERMIT NUMBER DISCHARGE NUMBER <br />MONITORING PERIOD <br />MM/DD/YYYY MM/DD/YYYY <br />FROM 03/01/2011 TO y 03/31/2011 <br />f <br />Form Approved <br />OMB No. 2040-0004 <br />DMR Mailing ZIP CODE: 81424-0535 <br />MINOR <br />GUNIS <br />SEDIMENT POND TO SANBORN CREEK <br />External Outfall rrr???III <br />No Discharge <br /> <br />PARAMETER QUANTITY OR LOADING QUALITY OR CONCENTRATION NO. <br />EX FREQUENCY <br />OF ANALYSIS SAMPLE <br />TYPE <br /> VALUE VALUE UNITS VALUE VALUE VALUE UNITS <br />pH SAMPLE <br /> MEASUREMENT <br /> <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 /> <br />0053010 <br />Effluent Gross PERMIT <br />REQUIREMENT ""•' """ "'•" """ 35 <br />30DA AVG 70 <br />DAILY MX <br />mg/L <br />Monthly <br />GRAB <br />Solids, settleable SAMPLE <br /> MEASUREMENT <br /> <br />005451 0 <br />Effluent Gross PERMIT <br />REQUIREMENT """ """ """ •""' Req. Mon. <br />30DA AVG Req. Mon. <br />DAILY MX mUL <br />Monthly <br />GRAB <br />Iron, total (as Fe) SAMPLE <br /> MEASUREMENT <br /> <br />0104510 <br />Effluent Gross PERMIT <br />REQUIREMENT """ """ """ '•"" 3500 <br />30DA AVG 7000 <br />DAILY MX ug/L <br />Monthly <br />GRAB <br />Oil and grease SAMPLE <br /> MEASUREMENT <br />»„ <br /> <br />0358210 <br />Effluent Gross PERMIT <br />REQUIREMENT ",,,, "•"` 10 <br />INST MAX mg/L <br />Contingent <br />GRAB <br />Flow, in conduit or thru treatment plant SAMPLE <br /> MEASUREMENT <br /> <br />50050 1 0 <br />Effluent Gross PERMIT <br />REQUIREMENT Req. Mon. <br />30DAAVG Req. Mon. <br />DAILY MX Mgal/d „•'•• ••• •„-•• <br />Monthly <br />INSTAN <br />Solids, total dissolved SAMPLE <br /> MEASUREMENT <br /> <br />702951 0 <br />Effluent Gross PERMIT <br />REQUIREMENT ""•` """ '""" """ Req. Mon. <br />30DA AVG Req. Mon. <br />DAILY MX mg/L <br />Quarterly <br />GRAB <br />N ME/TITLE PRINC PAL ECUTIVE OFFICER rvundapmahyof aw harthl.d°n randanana<bm?nv",„papa dundnmyd;m?e°nm <br /> supemsion inacc°rdanr<wiNasystnn designcdmasaurc that qualtfid pcrs°nnelpropaly gams a"d <br />evaluare dre inf tioo .vbmined Based on my inquuy of the <br />awnor <br />erson wIw <br />a <br />a <br />th •1 TELEPHONE DATE <br /> <br />` p <br />p <br />ge <br />m <br />n <br />e <br />syve b or m) persons dveand belief, bdief,' for gather nd inlcl on, Ne if <br />n submitted w <br />m d,c bat of m) knowlWge and tmc, -, and w mpletc. I am aware rha t-here e are sitnir <br />11 !? /• r <br /> <br /> <br />- ?/ <br />9A0 <br />4Z <br /> <br /> <br />4/O <br />(} , I • perultia for mbmntinp Gltt informanon. including the pnabihty of fe and imprisonment for knowing ( <br /> <br />TYPED O PRINTED SIGNA E OF PRINCIPAL EXECU OFFICER OR <br /> AUTHORIZED AGENT ARC cod. NUMBER MM/D <br />rnMu=MTC Aun cvol AaJAT1Awt Ac w <br />----------- --- - <br />TSS & TOTAL IRON LIMITS WILL BE WAIVED, AND SETTLEABLE SOLIDS LMT APPLIED FOR <=10YR,24HR PRECIP EVENT;SETTLEABLE SOLIDS LIMIT <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 Form 3320.1 (Rev.01106) Previous editions may be used. <br />BE WAIVED FOR >10YR,24HR EVENT-SEE LAA RP 4-5, AND I.A.2, P. 5 <br />Pape 1