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PERMITTEE NAME/ADDRESS (include FacilltyName/Location ii Different) NAME: Twentymile Coal LLC ADDRESS: 29515 Routt CR 27 Oak Creek, CO 80467 FACILITY: MINES 1812 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 007-Q ITN BER I DISCHARGENUMBER MONITORING PERIOD MM/DD/YYYY MM/DD/YYYY 01/01/2017- 031:31/2017 Form Approved OMB No. 2040.0004 DMR Mailing ZIP CODE: 80467 MAJOR (SUBR JC) Quarterly Monitoring for 007A External Outfall No Discharge NAMEITITLE PRINCIPAL EXECUTIVE OFFICER 1ce".nderpenehydlawdmtthusdocumentand all ell—hments,—efaef—d under mydvebm- supervaon m arcadance wdfi a :ysiem dosignetli a assure Ual ryuu�ed persannN properly gaNer aM l"te, the aformahon suhmuled Based an my aN-y of the person a persmn ado menage the system,st a# my persons"Vnd elief,ve,forgate, and themfele I an, them"IthersuhmAted a, s the bast a my krawledge and belief, true, maturate, erq arrplele t em aware dmi there are sgndr2d permluesfor submrdag false,nfwmatien, induct rg the pwsiCAAyd fine and rmpnsrnmerdfor nmwngww 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 Conductivity SAMPLE '•"'• '••"• '•••" •••"• MEASUREMENT --- 00094 1 0 PERMIT *••"* "**•' '*•*•` ••''•' Req. Mon. Req. Mon. umho/cm Quarterly GRAB Effluent Gross REQUIREMENT QRTR AVG QRTR MAX Solids, settleable SAMPLE ""'•" ""•` •""• *'•`• MEASUREMENT 005451 0 PERMIT Req. Mon. Req. Mon. mUL Quarterly GRAB Effluent Gross REQUIREMENT QRTR AVG QRTR MAX Solids, settleable SAMPLE • •... ...... *...,, ...... MEASUREMENT 0054500 PERMIT '**'•' ""`* ""•' '••` Req. Mon. Req. Mon. m L Quarterly GRAB See Comments REQUIREMENT QRTR AVG QRTR MAX Iron, total [as Fe] SAMPLE '•'"' *""' """ "•"• MEASUREMENT 010451 0 PERMIT '*"`* •***•* •""* """ Req. Mon. Req. Mon. ug/L Quarterly GRAB Effluent Gross REQUIREMENT QRTR AVG QRTR MAX Iron, total [as Fe] SAMPLE ••.... "• " "*•" ••^•• MEASUREMENT 0104500 PERMIT •••'•• '•"'• ••••*• "•••. Req. Mon. Req. Mon. ug/L Quarterly GRAB See Comments REQUIREMENT QRTR AVG QRTR MAX Oil and grease SAMPLE ...... .•'.'• •••••• •••••• "•••• MEASUREMENT 0358210 PERMIT '•*"* `•"•` """ •*•••• `... 10 mg/L Contingent GRAB Effluent Gross REQUIREMENT INST MAX Solids, total dissolved SAMPLE """ ''"•' '•"" •"•'•• MEASUREMENT 702951 0 PERMIT """ *"'•' *""* Req. Mon. Req. Mon. mg/L Quarterly CALCTD Effluent Gross REQUIREMENT QRTR AVG QRTR MAX NAMEITITLE PRINCIPAL EXECUTIVE OFFICER 1ce".nderpenehydlawdmtthusdocumentand all ell—hments,—efaef—d under mydvebm- supervaon m arcadance wdfi a :ysiem dosignetli a assure Ual ryuu�ed persannN properly gaNer aM l"te, the aformahon suhmuled Based an my aN-y of the person a persmn ado menage the system,st a# my persons"Vnd elief,ve,forgate, and themfele I an, them"IthersuhmAted a, s the bast a my krawledge and belief, true, maturate, erq arrplele t em aware dmi there are sgndr2d permluesfor submrdag false,nfwmatien, induct rg the pwsiCAAyd fine and rmpnsrnmerdfor nmwngww /j r TELEPHONE DATE ' f((a /V•V{E/l LYS�� (� _ � (r *70 Z 7.s G ¢ —� c^ , /� SIGNATURE OF PRINCIPAL EXECUTIVE OFFICER OR AUTHORIZED AGENT TYPED OR PRINTED AREA cede NUMBER MMlDDlYYYY 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