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 -X PERMI NUMB R DISCHARGE NUMBER MONITORING PERIOD MWDD/YYYY MWDD/YYYY 01/01/2014 03/31/2014 Form Approved r , OMB No. 2040 -0004 DMR Mailing LP CODE: 81434 MINOR Chronic WET Testing for 0158 External Outfall No Discharge QUANTITY OR LOADING QUALITY OR CONCENTRATION NO. FREQUENCY SAMPLE PARAMETER DATE EX OF ANALYSIS TYPE VALUE VALUE UNITS VALUE VALUE VALUE UNITS Toxicity [chronic], Ceriodaphnia dubi i SAMPLE « * *' *» ' *` »'" " **"" '• "'•` " "`•'• MEASUREMENT 61426 P 0 PERMIT *` "` »• ••'•`• '•" ** Req. Mon. ""' " "" • "' "•' tox chronic Quarterly GRAB -3 See Comments REQUIREMENT SINGSAMP Toxicity [chronic], Ceriodaphnia dubii i SAMPLE * * *' ** *'••" " * *••' ' ""•' " "••• MEASUREMENT 61426 S 0 PERMIT • * *••' `•' * «* ""'•• Req. Mon. " *•' "" " "• "' tox chronic Quarterly GRAB -3 See Comments REQUIREMENT SINGSAMP Toxicity [chronic], Pimephales SAMPLE "•*** • * * *'• `**•~ * " " "` • * * *•` promelas [Fathead Minnow] MEASUREMENT 61428 P 0 PERMIT " "••* * *` * "• * * "'• Req. Mon. """` '•"'" tox chronic Quarterly GRAB -3 See Comments REQUIREMENT SINGSAMP Toxicity [chronic), Pimephales SAMPLE • * *• *« • "• *'• '• *•`* '• * "' ' *•••• promelas [Fathead Minnow] MEASUREMENT 61428 S 0 PERMIT • " "• » * "•' "'•`• Req. Mon. • "'" "" "• "' tox chronic Quarterly GRAB -3 See Comments REQUIREMENT SINGSAMP %Effect Static Renewal 7 Day Chron c SAMPLE •• * *'• ' " "••• "' * "• " "'* » *• "` Ceriodaphnia dubia MEASUREMENT TCP3B P 0 PERMIT •••• ** •'" "' *•"`• Req. Mon. • """ •" " "" % Quarterly GRAB -3 See Comments REQUIREMENT SINGSAMP %Effect Static Renewal 7 Day Chron c SAMPLE ` » "•` " "• "" "' *`• " "`•' `•`"*• Cenodaphnia dubia MEASUREMENT TCP3B S 0 PERMIT •• *• *• * * » »"" • *`*" Req. Mon. `••••' '•'"'• % Quarterly GRAB -3 See Comments REQUIREMENT MN VALUE %Effect Static Renewal 7 Day Chron c SAMPLE *• * * "* •` » " ** " ""'» " «• *•' ••• * *• Ceriodaphnia dubia MEASUREMENT TCP36 T 0 PERMIT *`• "• »' *'*' '*«"*• 100 '" » "•' '" *"` % Quarterly GRAB -3 See Comments REQUIREMENT MN VALUE NAMEITITLE PRINCIPAL EXECUTIVE OFFICER 1 cerbfy under penalty of law that the document and all attachments — prepared under my direction or supervision in accordance information with a system designed on my i to assure that person o qualified personnel property gather and alwte the information ¢ubmdted Based on my inquiry of the pennon or persons who manage the system, or those persons directly responsible for gathering the information, the information submlded e, to the best of my krwwledge and belief, true, accurate, and complete I am aaere Mat there are significant penalties for submdbng false information, including the possibility of fine and imprisonment for mo.ng violations ^ ^ ` a, V, ,.�_}.^( G K TELEPHONE DATE \ (' k7,1 6- 2rP54 _ q 9 �Q Z/ - 'qQ OY 02 SIGNATURE OF PRINCIPAL EXECUTIVE OFFICER OR AUTHORIZED AGENT TYPED OR PRINTED pREp CoM NUMBER MMID COMMENTS AND EXPLANATION OF ANY VIOLATIONS (Reference all attachments here) Rpt lowest % at which statistically signif cliff between test 8r control using test code "S ". Rpt IC25 using test code "P ". Use test code 'T" to report highest % reported between IC25 and statistically signif cliff for cenodaphnia and pimephales. EPA Form 3320 -1 (Rev.01106) Previous editions may be used. 08/26/2013 Page 1