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PERMITTEE NAME/ADDRESS (Include Facility Name/Location if 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) 000027154 002-A PERMITNUMBEIR I I DISCHARGENUMBER MONITORING PERIOD MM/DD/YYYY MM/DD/YYYY 04/01/201& 04/30/20 Form Approved OMB No 2040-0004 DMR Mailing ZIP CODE: 80467 MAJOR (SUBR JC) ROUTT MINE 1, POND T TO FOIDEL CREEK External Outfall No Discharge = NAMErnTLE PRINCIPAL EXECUTIVE OFFICER 1 termly under penalty at law that this document and as attachments were prepared under my d-clion or superman ai accordanca wath a system demgned to assure that qualified personnel property gather erd vaWate the trdorrrlabon submitted Based on my ingtnry of the person or persons who manage the system or those persona directly responsible for gotha ng the nlormabon, the mfurmatlon submated rs, u the a m�e5oar dge sub and false Wa. .bon in and complete I am aware that there we a� para submitting fated mtarmabon �ncnKang the pou�mdd r the and anpdsmmant ra novengwdatlon: 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 pHSAMPLE MEASUREMENT ...,.. ..,... ...... ....., v C 0040010 PERMIT ••••« ""'• '•"•' 6.5 """ 9 SU Weekly GRAB Effluent Gross REQUIREMENT MINIMUM MAXIMUM Solids, total suspended SAMPLE MEASUREMENT """' •"•••• ...... ««•• S- 2r r/-7 0053010 PERMIT '•"" """ ""'• ""•• 35 70 mg/L Weekly GRAB Effluent Gross REQUIREMENT 30DA AVG DAILY MX Solids, total suspended SAMPLE MEASUREMENT •••"` .'...• •"••• "•••` /V� �,fia (/-� /• 0053000 PERMIT •"••' "••"• "'•" ••'«• Req. Mon. Req. Mon. mg/L Weekly GRAB See Comments REQUIREMENT 30DA AVG DAILY MX Solids, settleable SAMPLE MEASUREMENT ."'•` ••"'• "'••' ""•' -1" G , / C r / G v 005451 0 PERMIT '••"` •••'•• ••"'• ""'• Req. Mon. 5 mUL Weekly GRAB Effluent Gross REQUIREMENT 30DA AVG DAILY MX Solids, settleable SAMPLE MEASUREMENT •••... ...... ...... ".••` /v,/4- w A l 0054500 PERMIT "*••• '•'•" •""" ••••« Req. Mon. Req. Mon. mL/L Weekly GRAB See Comments REQUIREMENT 30DA AVG DAILY MX Iron, total [as Fe) SAMPLE MEASUREMENT ...... ••"•• «•«' ••'••• Z( 4s Z4 �'G Q /7 0104510 PERMIT ••«" '•'••• ""'« """ 3500 7000 ug/L Weekly GRAB Effluent Gross REQUIREMENT 30DA AVG DAILY MX Iron, total [as Fe] SAMPLE•""' MEASUREMENT •""• •""' ""'" /` A N >� N /� / 0104500 PERMIT •`•••' "'«' .'••" •••«' Req. Mon. Req. Mon. ug/L Weekly GRAB See Comments REQUIREMENT 30DA AVG DAILY MX NAMErnTLE PRINCIPAL EXECUTIVE OFFICER 1 termly under penalty at law that this document and as attachments were prepared under my d-clion or superman ai accordanca wath a system demgned to assure that qualified personnel property gather erd vaWate the trdorrrlabon submitted Based on my ingtnry of the person or persons who manage the system or those persona directly responsible for gotha ng the nlormabon, the mfurmatlon submated rs, u the a m�e5oar dge sub and false Wa. .bon in and complete I am aware that there we a� para submitting fated mtarmabon �ncnKang the pou�mdd r the and anpdsmmant ra novengwdatlon: /� X'1 r 1 TELEPHONE DATE sr , /,� �C I j►"�`Jy-. ^� 0'7O 1 � ( C %O z—JSZ/ S Z SIGNATURE OF PRINCIPAL EXECUTIVE OFFICER OR AUTHORIZED AGENT TYPED OR PRINTED -EAC— NUMBER MMIDD YY COMMENTS AND EXPLANATION OF ANY VIOLATIONS (Reference all attachments here) ALTERNATE LIMITS FOR TSS (MLOC=O) APPLY IF 10YR/24HR PRECIP EVENT CLAIMED. ALTERNATE LIMITS FOR IRON &SETTLEABLE SOLIDS (MLOC=O) APPLY ONLY IF <=10YR,24HR PRECIP. EVENT CLAIMED. OIL & GREASE - SEE I.C.19,PAGE 16 EPA Form 3320-1 (Rev.01106) Previous editions may be used. 08/26/2013 Page 1