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NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) <br />DISCHARGE MONITORING REPORT (DMR) <br />PERM ITTEE NAME/ADDRESS (Include Facility Name/Location if Different) <br />NAME: Colowyo Coal Company LP <br />ADDRESS: 5731 State Highway 13 <br /> Meeker, CO 81641 <br />FACILITY: COLOWYO MINE <br />LOCATION: 5731 SOUTH HIGHWAY 13 <br /> MEEKER, CO 81641 <br />000045161 012-A <br />PERMIT NUMBER DISCHARGE NUMBER <br />MONITORING PERIOD <br />MM/DD/YYYY MM/DD/YYYY <br />FROM 10/01/2010 TO 12/31/2010 <br />Form Approved <br />OMB No. 2040-0004 <br />DMR Mailing ZIP CODE: 81641 <br />MINOR <br />(SUBR JC) MOFAT <br />SEC. 28 TO GOOD SPRING CREEK <br />External Outfall <br />ATTN: KEITH HALEY, MINE MANAGER <br />No Discharg"el29 <br />PARAMETER QUANTITY OR LOADING QUALITY OR CONCENTRATION EX FREQUENCY <br />OF ANALYSIS STYPPEE <br /> VALUE VALUE UNITS VALUE VALUE VALUE UNITS <br />pH SAMPLE ,.,,,, ...... ...... <br /> MEASUREMENT <br />0040010 PERMIT ,..... ...•.. 6.5 9 SU <br />Effluent Gross REQUIREMENT MINIMUM MAXIMUM Monthly INSITU <br />Solids, total suspended SAMPLE ...... .... ,. ...... <br /> MEASUREMENT <br />005301 0 PERMIT ...... 35 70 mg/L <br />Effluent Gross REQUIREMENT 300A AVG DAILY MX Monthly GRAB <br />Solids, settleable SAMPLE ,..... ...... ....., <br /> MEASUREMENT <br />005451 0 PERMIT Req. Mon. Req. Mon. rnUL <br />Effluent Gross REQUIREMENT 30DA AVG DAILY MX Monthly GRAB <br />Iron, total recoverable SAMPLE <br /> MEASUREMENT <br />009801 0 PERMIT 1 Req. Mon. mg/L <br />Effluent Gross REQUIREMENT 30DA AVG DAILY MX Monthly GRAB <br />Oil and grease SAMPLE <br /> MEASUREMENT <br />035821 0 PERMIT «••`•• 10 mg/L <br />Effluent Gross REQUIREMENT INST MAX Contingent GRAB <br />Flow, in conduit or thru treatment plant SAMPLE <br /> MEASUREMENT <br />500501 0 PERMIT Req. Mon. Req. Mon. Mgal/d '•«... «..... «.,.,, «,.««« <br />Effluent Gross REQUIREMENT 30DA AVG DAILY MX Monthly INSTAN <br />Solids, total dissolved SAMPLE ..,.,, <br /> MEASUREMENT <br />702951 0 PERMIT Req. Mon. Req. Mon. mg/L <br />Effluent Gross REQUIREMENT 30DA AVG DAILY MX Quarterly GRAB <br />EPA Form 3320.1 (Rev.01/06) Previous editions may be used. Page 1 <br />COMMENTS AND EXPLANATION OF ANY VIOLATIONS (Reference all attachments here) <br />SETTLEABLE SOLIDS LIMIT APPLIES ONLY IF <=10YR,24HR PRECIP EVENT IS CLAIMED. IF CLAIM APPROVED BY WQCD,TSS & IRON LIMITS WILL NOT BE APPLIED TO REPORTED MEASUREMENTS -SEE I.A.2, PG. <br /> 3 FOR <br />BURDEN OF PROOFREQUIREMENTS. OIL & GREASE- 1.B.1.B, PG. 5. QRTRLY SAMPLING INSTRUCTIONS - I.C.11, PG. 5.