2014-04-08_HYDROLOGY - C1981022 (2)

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PERMITTEE NAME/ADDRESS (Include Facility Name/Location if Different) NAME: Oxbow Mining LLC ADDRESS: PO Box 535 Somerset, CO 81434 FACILITY: ELK CREEK MINE LOCATION: 3737 HWY 133 SOMERSET, CO 81434 ATTN: Mike Ludlow, Exec VP NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) DISCHARGE MONITORING REPORT (DMR) COG850064 015 -W PERMIT-NUMBER DISCHARGE UM R MONITORING PERIOD MM/DD/YYYY MM/DD/YYYY 01/01/2014 03/31/2014 DMR Mailing ZIP CODE: MINOR Form Approved �. OMB No. 2040 -0004 ay 81434 Acute WET Testing for 015B External Outfall No Discharge it NAMFJTITLE PRINCIPAL EXECUTIVE OFFICER I cerbty under a=ril n law that the document and all attachments were prepared rsonn under my direction er supenvisron m accordance vatlr a system desgned to assure that qualified personnel properly gather aluate the nfonnation submitted Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submded is, to the beat of my knowledge and belief true, accurate, and complete 1 am aware that there are significant penalties for submitting false information, ncludtng the possibility of fine and imprisonment for wug�b QUANTITY OR LOADING QUALITY OR CONCENTRATION NO. FREQUENCY SAMPLE PARAMETER SIGNATURE OF PRINCIPAL EXECUTIVE OFFICER OR AUTHORIZED AGENT EX OF ANALYSIS TYPE VALUE VALUE UNITS VALUE VALUE VALUE UNITS LC50 Static Renewal 48Hr Acute SAMPLE «+* ++. " «• *.• • "•• *" • "••« »+.•" Daphnia magna MEASUREMENT TAM3C 1 0 PERMIT * * * «++ * : + + ++ + +++++ 100 + + * + ++ * *++*. % Quarterly GRAB Effluent Gross REQUIREMENT MN VALUE LC50 Statre 96Hr Acute Pimephales SAMPLE * « *•++ " * + « *« " *•••" .* ** . ++•.+. MEASUREMENT TAN6C 1 0 PERMIT • " * "•• • *•••• * *•••' 100 ••""" `"'"•• % Quarterly GRAB Effluent Gross REQUIREMENT MN VALUE NAMFJTITLE PRINCIPAL EXECUTIVE OFFICER I cerbty under a=ril n law that the document and all attachments were prepared rsonn under my direction er supenvisron m accordance vatlr a system desgned to assure that qualified personnel properly gather aluate the nfonnation submitted Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submded is, to the beat of my knowledge and belief true, accurate, and complete 1 am aware that there are significant penalties for submitting false information, ncludtng the possibility of fine and imprisonment for wug�b /\ (i �j '" � TELEPHONE DATE I- LAa 6 L� (� _ 1^ /7v J l+r,� 8� e/ / 0 & SIGNATURE OF PRINCIPAL EXECUTIVE OFFICER OR AUTHORIZED AGENT TYPED OR PRINTED AREA coa NUMBER MMIDD/YYW COMMENTS AND EXPLANATION OF ANY VIOLATIONS (Reference all attachments here) Report LC50 - Statistical point estimate which is lethal to 50% of test organisms, and attach acute toxicity test report form to DMR. EPA Form 3320 -1 (Rev.01 /06) Previous editions may be used. 08/26/2013 Page 1