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,41-1977- 30,0 <br />STATE OF COLORADO <br />Big Ritter, Jr., Governor <br />Martha E. Rudolph, Executive Director <br />Dedicated to protecting and improving the health and environment of the people of Colorado <br />4300 Cherry Creek Dr. S. <br />Denver, Colorado 80246-1530 <br />Phone (303) 682-2000 <br />TDD Line (303) 681-7700 <br />Located in Glendale, Colorado <br />Laboratory Services Division <br />8100 Lowry Blvd. <br />Denver, Colorado 80230-6928 <br />(303) 692-SOW <br />httpJPovww.cdphe.state.co,us <br />July 29, 2010 <br />John S. Hamrick, VP Milling <br />Cotter Corporation <br />P.O. Box 1750 <br />Canon City, CO 81215 <br />t•C <br />( O <br />*f876* <br />Colarado Department <br />of PublicHea&h <br />andFmvironnnent <br />RE: Notice of Violation/Cease. and Desist Order, Number: I0-100601-1 ? <br />Cotter's 200-am 'Water Treatment System at Schwartzwalder Mine <br />Dear Mr. Hamrick: <br />The Colorado Department of Public Health and Environment's Water Quality Control Division (the <br />"Division") received Cotter Corporation's ("Cotter") July 7, 2010, technical memorandum outlining <br />Cotter's plans to implement a water treatment system for the alluvial area at Schwartzwalder Mine <br />with a 200-gpm design capacity and nominal flows of 100-gpm. The 200-gpm treatment system is <br />being installed to comply with paragraph 28.a. of the Notice of Violation/Cease and Desist Order, <br />Number: 10-100601-1 (the "NOV/CDO"), that the Division issued to Cotter on June 1, 2010. <br />The Division hereby grants Cotter temporary authorization to discharge from the 200-gpm water <br />treatment system, from the outfall location described in the July 7, 2010 technical memorandum, <br />and in accordance with the following additional terns and conditions: <br />1. The Division expects that Cotter's discharge from the 200-gpm water treatment system will be <br />monitored at the. frequencies outlined below and will not contain effluent parameter <br />concentrations that exceed the following limitations: <br /> Ef4uisiat ?nitatioas.tntltm ?anaelate'atians. Mfleitotring?Requiremcntg <br /> <br />Eitlnent Par.•eate#er <br />3aDaY <br />Av a <br />7-Da?v.: <br />Ay <br />D • ' <br />u <br />Year <br />Avers a <br /> <br />Soucy <br /> <br />Sttttoarlile Tyioe <br />Effluent Flow (MGD) 0.288 Report Continuous Recorder <br />pH (su) 6.5-9 5 Days / week Grab <br />COD (mg/1) 1100 200 Weekly Composite <br />TSS, effluent (m&11) 20 30 3 Days / Week Composite <br />Oil and Grease (mg/1) 10 5 DayslWeek Visual <br />TDS (mg/1) Report Report Quarterly Composite <br />