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PERMITTEE NAME/ADDRESS (include Facility Name/Location i(Different) NAME: Twentymile Coal LLC ADDRESS: 29515 Routt CR 27 _ Oak Creek, CO 80467 FACILITY: MINES 1&2 AND ECKMAN PARK MINE LOCATION: 29515 RCR #27 OAK CREEK, CO 80467 ATTN: Patrick Sollars, GM NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) DISCHARGE MONITORING REPORT (DMR) C00027154 MON-7 PERMIT MBER DISCHARGE NMBER MONITORING PERIOD MM/DD/"YY MM/DD/YYYY 03/01/2014? 1 1 03/31/2017 Form Approved OMB No. 2040-0004 DMR Mailing ZIP CODE: 80467 MAJOR (SUBR JC) ROUTT MINE 1, POND F TO FOIDEL CREEK External Outfall No Discharge 071 NAMEITITLE PRINCIPAL EXECUTIVE OFFICER Ieemlyunderpenettyof to. that this documenland alledachmemswere pra"redLmdarmydueefwnor •upervismn m eacordance with a system designed to assure that qualm d personnel property gather and lust. the Idormatton autandted. Based m my mqu" d the person or p—. ho manage the system, Of aloe. persons d-dy respon . for gather g the mrormaWn, the 14— 1— fubmitled to the best d my knowledge and boW, true, &=rate. and —mpkte I am aware that there ate agndksMperueesforsubmMmgfakepdwmatgn.eaWftthe p.—Wydgnearal-pnsonmemfor 4,—whona QUANTITY OR LOADING QUALITY OR CONCENTRATION NO. FREQUENCY SAMPLE PARAMETER SIGNATURE OF PRINCIPAL EXECUTIVE OFFICER OR AUTHORIZED AGENT EX OFANALYSIS TYPE VALUE VALUE UNITS VALUE VALUE VALUE UNITS Arsenic, total [as As) SAMPLE ''"" """ MEASUREMENT 0100210 PERMIT •••'•' `aa••• '•'•`• "•*" Req. Mon. Req. Mon. ug/L Monthly GRAB Effluent Gross REQUIREMENT 30DA AVG DAILY MX Zinc, potentially dissolved SAMPLE e••"' 'e"" MEASUREMENT 013031 0 PERMIT ••'•*• """ """ """ Req. Mon. Req. Mon. ug/L Monthly GRAB Effluent Gross REQUIREMENT 30DA AVG DAILY MX Chromium, trivalent, potentially SAMPLE ""' """ """ """ dissolvd MEASUREMENT 0131410 PERMIT "'••• """ "'•" """ Req. Mon. Req. Mon. ug/L Monthly GRAB Effluent Gross REQUIREMENT 300A AVG DAILY MX Lead, potentially dissolvd SAMPLE '""" """ """ MEASUREMENT 013181 0 PERMIT **•'** """ """ """' Req. Mon. Req. Mon. ug/L Monthly GRAB Effluent Gross REQUIREMENT 300A AVG DAILY MX Nickel, potentially dissolvd SAMPLE """ ""•' "*"* MEASUREMENT 013221 0 PERMIT `••••' """ "*'*' ""*' Req. Mon. Req. Mon. ug/L Monthly GRAB Effluent Gross REQUIREMENT 30DA AVG DAILY MX Selenium, potentially dissolvd SAMPLE **•'*' •""' '**•" ''""" MEASUREMENT 013231 0 PERMIT "••" """ """ """` Req. Mon. Req. Mon. ug/L Monthly GRAB Effluent Gross REQUIREMENT 30DA AVG DAILY MX NAMEITITLE PRINCIPAL EXECUTIVE OFFICER Ieemlyunderpenettyof to. that this documenland alledachmemswere pra"redLmdarmydueefwnor •upervismn m eacordance with a system designed to assure that qualm d personnel property gather and lust. the Idormatton autandted. Based m my mqu" d the person or p—. ho manage the system, Of aloe. persons d-dy respon . for gather g the mrormaWn, the 14— 1— fubmitled to the best d my knowledge and boW, true, &=rate. and —mpkte I am aware that there ate agndksMperueesforsubmMmgfakepdwmatgn.eaWftthe p.—Wydgnearal-pnsonmemfor 4,—whona TELEPHONE DATE / ^ v /t ' 1 q 7C1 I SIGNATURE OF PRINCIPAL EXECUTIVE OFFICER OR AUTHORIZED AGENT ARF.Acaw NUMBER MMIDDMYY TYPED OR PRINTED COMMENTS AND EXPLANATION OF ANY VIOLATIONS (Reference all attachments here) EPA Form 3320-1 (Rev.01106) Previous editions may be used. 08/26/2013 Page 1