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PERMITTEE NAME/ADDRESS (Include Facility Name/Location if Different) NAME: Seneca Coal Co LLC ADDRESS: PO Box 670 Hayden, CO 81639-0670 FACILITY: SENECA MINE COMPLEX LOCATION: 37766 RCR 53 HAYDEN, CO 81639 ATTN: Scott Cowman/Sr Env Specialist NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) DISCHARGE MONITORING REPORT (DMR) C00000221009 -A PERMIT NUMBER DISCHARGE NUMBER MONITORING PERIOD MM/DD/YYYY MM/DD/YYYY 04/01/2015 06/30/2015 Form Approved OMB No. 2040-0004 DMR Mailing ZIP CODE: 81639 MAJOR ROUTT DSCHG TO TRIB/SAGE CREEK External Outfall No Discharge NAMEITITLE PRINCIPAL EXECUTIVE OFFICER 1 certify undeipenalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system to , or those persons directly responsible for gathering the nformabon, the mformaeon submrtled is, the best of my knoviledge and belief, true. accurate, and complete. I am aware that there are significant penalties for submitting false information. includling the possibility of fine and imprisonment for knowng violations. QUANTITY OR LOADING QUALITY OR CONCENTRATION NO. FREQUENCY SAMPLE PARAMETER SIGNATURE OF PR IPALEXECUTIVEOFFICEROR THC l,, AGENT EX OF ANALYSIS TYPE VALUE VALUE UNITS VALUE VALUE VALUE UNITS pH SAMPLE ...,.. MEASUREMENT 0040010 PERMIT **«*** ~'•'~ """ 6.5 ''**'* 9 SU Monthly INSITU Effluent Gross REQUIREMENT MINIMUM MAXIMUM Solids, settleable SAMPLE ****** *~**** *'~"' MEASUREMENT 005451 0 PERMIT aa.«*« .*..a. **~** «««««« Req. Mon. .5 mL/L Monthly GRAB Effluent Gross REQUIREMENT 30DA AVG DAILY MX Oil and grease SAMPLE ****** *«**** MEASUREMENT 0358210 PERMIT "*"«** •~~•'* ~*•~' •`•~' '•"'"" 10 mg/L Contingent GRAB Effluent Gross REQUIREMENT INST MAX Flow, in conduit or thru treatment SAMPLE "*"*"« *"*""* '**"*" '*'*** plant MEASUREMENT 500501 0 PERMIT Req. Mon. Req. Mon. MGD """`" "*""** "'"' ''*"* Monthly INSTAN Effluent Gross REQUIREMENT 30DA AVG DAILY MX Solids, total dissolved SAMPLE "*'«** '***** "** MEASUREMENT 702951 0 PERMIT ~''a"` **"*** ****** '•***` Req. Mon. Req. Mon. mg/L Quarterly GRAB Effluent Gross REQUIREMENT QRTR AVG DAILY MX Oil and grease visual SAMPLE "*"* "«* ...*.. .....* MEASUREMENT 840661 0 PERMIT """**" Req. Mon. Y=1;N=0 '•~*•' """ ""** ""*' Monthly I VISUAL Effluent Gross REQUIREMENT INST MAX NAMEITITLE PRINCIPAL EXECUTIVE OFFICER 1 certify undeipenalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system to , or those persons directly responsible for gathering the nformabon, the mformaeon submrtled is, the best of my knoviledge and belief, true. accurate, and complete. I am aware that there are significant penalties for submitting false information. includling the possibility of fine and imprisonment for knowng violations. �, TELEPHONE DATE t \ l <_ J h �,� ` SIGNATURE OF PR IPALEXECUTIVEOFFICEROR THC l,, AGENT TYPED OR PRINTED AREA Code NUMBER MMIDDIVYVV COMMENTS AND EXPLANATION OF ANY VIOLATIONS (Reference all attachments here) OIL & GREASE - SEE 1.6.1.X. TDS MONITORING - 1.B.2. EPA Form 3320-1 (Rev.01/06) Previous editions may be used. 04/20/2015 Page 1