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STATE OF COLORADO <br />John W, Hickenlooper, Governor <br />Christopher E. 4lrbina, MD, MPH do Cora <br />Executive Director and Chief Medical Officer <br />Dedicated to protecting and improving the health and environment of the people of Colorado * y? <br />4300 Cherry Creek Dr. 5. Laboratory Services Divisio * f876 �. <br />Denver, Colorado 80246 -1530 8104 Lowry Blvd. - - <br />Phone (303) 692 -2000 Denver, Colorado 84230 -69 Colorado Department <br />Located in Glendale, Colorado (303) 692 -3090 JUL 3 U 201 <br />of Public Health <br />http:llwww.odphe.state.co.us H and Environment <br />CDPS Number 000000132 - July 24, 2012 <br />James Cooper, Executive Vice President <br />Oxbow Mining LLC f <br />PO Box 535 <br />Somerset, CO 81434 -0535 <br />COMPLIANCE, ADVISORY — FAILURE TO SUBMIT A COMPLETE DISCHARGE MONITORING <br />REPORT (DMR) SANBORN CRK & ELK CRK MINES, C00000132 <br />Dear Sir or Madam: <br />Oxbow Mining LLC is subject to the Colorado Discharge Permit System, Permit No. C00000132 (the "Permit "). The <br />Permit authorizes Oxbow Mining LLC to discharge treated wastewater subject to the specific effluent limitations and <br />other conditions of the Permit. Section 61.8, 5 CCR 1002 -61, requires a permittee to comply with all the terms and <br />conditions of the permit. <br />The Colorado Department of Public Health and Environment -Water Quality Control Division ( "Division ") has received <br />your Discharge Monitoring Report (DMR) for the following monitoring periods. The DMR(s) as submitted is missing <br />the following required monitoring data. <br />outfall <br />Mon Period <br />Begin <br />Mo eriod <br />End <br />Parameter <br />Stat Base <br />016A <br />311/12 <br />3131112 <br />00400 - pH <br />MAXIMUM <br />016A <br />311112 <br />3131112 <br />00400 - pH <br />MINIMUM <br />016A <br />311112 <br />3131112 <br />00530 - Solids, total suspended <br />30DA AVG <br />016A <br />311112 <br />3131/12 <br />00530 - Solids, total suspended <br />DAILY MX <br />016A <br />311112 <br />3131112 <br />00545 - Solids, settleable <br />30DA AVG <br />016A <br />311112 <br />3139112 <br />00545 - Solids, settleable <br />DAILY MX <br />016A <br />311112 <br />3131112 <br />01045 - Iron, total as Fe <br />30DA AVG <br />016A <br />311112 <br />3131/12 <br />01045 - Iron, total as Fe <br />DAILY MX <br />016A <br />3/1112 <br />3131112 <br />03582 - Oil and grease <br />iNST MAX <br />016A <br />311112 <br />3/31112 <br />50050 - Flow, in conduit or thru treatment plant <br />30DA AVG <br />016A <br />3/1112 <br />3131112 <br />50050 - Flow, in conduit or thru treatment plant <br />DAILY MX <br />016A <br />311 /12 <br />3131112 <br />84066 - Oil and grease visual <br />INST MAX <br />Failure to submit the DMR with all required monitoring data within the required timcframe constitutes a violation of <br />your permit. <br />