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PERMITTEE NAMEIADDRESS (Indude Facility Name/Location of Different) <br />NAME: Oxbow Mining LLC <br />ADDRESS: PO Box 535 <br />Somerset, CO 81434 <br />FACILITY: ELK CREEK MINE <br />LOCATION: 3737 HWY 133 <br />SOMERSET, CO 81434 <br />ATTN Mike Ludlow, Exec VP <br />NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) <br />DISCHARGE MONITORING REPORT (DMR) <br />COG850064 015 -W <br />PERMIT N NUMBER <br />MONITORING PERIOD <br />MM/DD/YYYY MMIDD/YYYY <br />07/01/2013 09130/2013 <br />Form Approved <br />OMB No. 2040 -0004 <br />DMR Mailing ZIP CODE: 81434 <br />MINOR <br />Acute WET Testing for 015B <br />External Outfall <br />No Discharge 10 <br />NAME/TITLE PRINCIPAL EXECUTIVE OFFICER <br />cemfy under penalty of law that this document and all attachments were prepared under my direction o <br />supervision in accordance with a system desgned to assure that qualified personnel property gather and <br />valuate the information submitted Based on my inquiry of the person or persons who manage the <br />system or those persons directly responsible for gathwmg the information the information submitted s, <br />to the best of my knowledge and belief true accurate and complete I am aware that there are <br />gnifiwnt penaltss for cubnrtbrg false information mUUdog the possibility of fine and imprconment for <br />now°ng violations <br />QUANTITY OR LOADING <br />QUALITY OR CONCENTRATION <br />NO. <br />FREQUENCY <br />SAMPLE <br />PARAMETER <br />--cod. <br />EX <br />OF ANALYSIS <br />TYPE <br />VALUE <br />VALUE <br />UNITS <br />VALUE <br />VALUE <br />VALUE <br />UNITS <br />LC50 Static Renewal 48Hr Acute <br />SAMPLE <br />" «'•• <br />"' " " "• <br />" " " «• <br />"• ~~ <br />• " «« <br />Daphnia magna <br />MEASUREMENT <br />TAM3C 1 0 <br />PERMIT <br />~ ~~ <br />••'•" <br />' « «' <br />100 <br />" «« <br />' ~' "' <br />% <br />Quarterly <br />GRAB <br />Effluent Gross <br />REQUIREMENT <br />MN VALUE <br />LC50 Statre 96Hr Acute Pimephales <br />SAMPLE <br />" " " "" <br />" " "'•• <br />•• " ~• <br />•' ~•• <br />•••••• <br />MEASUREMENT <br />TAN6C 1 0 <br />PERMIT <br />« ~ "" <br />" "" <br />" " «' <br />100 <br />" "" <br />""" <br />% <br />Quarterly <br />GRAB <br />Effluent Gross <br />REQUIREMENT <br />MN VALUE <br />NAME/TITLE PRINCIPAL EXECUTIVE OFFICER <br />cemfy under penalty of law that this document and all attachments were prepared under my direction o <br />supervision in accordance with a system desgned to assure that qualified personnel property gather and <br />valuate the information submitted Based on my inquiry of the person or persons who manage the <br />system or those persons directly responsible for gathwmg the information the information submitted s, <br />to the best of my knowledge and belief true accurate and complete I am aware that there are <br />gnifiwnt penaltss for cubnrtbrg false information mUUdog the possibility of fine and imprconment for <br />now°ng violations <br />IG TURE OF PRI 'NCIPA EXECUTIVE OFFICER OR <br />AUTHORIZED AGENT <br />TELEPHONE <br />DATE <br />/ <br />TYPED OR PRINTED <br />�e O2 <br />l r �( <br />--cod. <br />NUMBER <br />M <br />COMMENTS AND EXPLANATION OF ANY VIOLATIONS (Reference all attachments here) <br />Report LC50 - Statistical point estimate which is lethal to 50% of test organisms, and attach acute toxicity test report form to DMR. <br />EPA Form 3320 -1 (Rev.01106) Previous editions may be used. <br />08/26/2013 <br />Page 1 <br />