Laserfiche WebLink
COLORADO DEPAR77NEM OF PUBLlC HEALTH AND ENVIRONMENT, Water Quality Control Division <br />Rarionale -Page 4, Permit No. CO-0027146 <br />Table /V-I -Chemicals <br />Chemical Name Pollutants of Concern Acceptable/Unacceptable <br />Sulfuric Acid sulfuric acid acceptable <br />Nalco 9806 Flocculent hydrocarbons acceptable <br /> <br />* Initial review showed this chemical appeared to be toxic to the environment. However the manufacturer's <br />representative has assured the Division that the chemical, after mixing with wastewater and breakdown over <br />normal detention time, would be nomoxic to the receiving water. On this bans, the Division has approved this <br />chemical. <br />B. Wastewater Treahnent Description <br />Several sedimentation ponds serve this site. They are summarized in Table II-1. Mine drainage from three areas goes to <br />three separate pond rystems. Fifteen sedimemarion pond systems have been engineered to serve to control runoff from <br />various areas. The discharge from Pond 4 (outfall 006) was formerly directed to the Governmem High[ine Cana[, however <br />the owners of the canal did not want this source discharged to the canal. /nstead, the pond will primarily serve as a <br />nondischarging ryslem, possible because there is sufficient volume available for containment of the 25-year, 24-hour <br />precipitation event in the pond. If the need to discharge arises, the permittee will pump the flow to Coal Creek. In this <br />renewal, the specified receiving water will change from the Government Highline Cana[ to Coal Creek. <br />The preparation plant is served by anon-discharging system. Water used in the prep plant is recirculated, none is <br />discharged to state waters normally. During a major upset, there potentially could be a discharge to sedimentation pond 8, <br />whose outfall is no. 008. This permit does not authorize discharges from the preparation plant. <br />The flocculent and coagulant shown in Table IV-1 are used in the refuse fines thickener circuit. <br />Sanitary wastes, including bathhouse water goes to anon-discharging aerated lagoon system. The system was designed jot <br />0.0075 MGD, 5 days/week or 0.00536 MGD (30-day average). This equates to a population of 250, we!! within the range <br />of current and furore employees at the site. <br />Pursuant to the authority of Article 9, Title 25, Regltlarions for the Certi,[t~ttion of Water Treatment Plant and Wastewater <br />Treatment Plant Opg ar tors. this facility may require a terrified industrial operator. The permittee should comact the <br />Colorado Plam Operators Certification Board at (303) 692-3550 jot further informarion. <br />V. PERFORMANCE HISTORY <br />A. Monitoring Data <br />1. Discharge Monitoriny~~rorts: Tables V-1, V-2 and V-3 summarize the efJluetu data for outfalls 001, 002 and 004 ar <br />the Powderhorn Coal Company facility reported on the nine quarterly Discharge Monitoring Reports (DMR's) from <br />January 1995 through March 1997. The permittee reported "no discharge" for outfalls 005, 006, 007, 008, 009, 010. <br />011, 012 013, 014 and OIS for the etuire period reviewed. <br />ante v- - ~ ~ - nuonn esuu yr u au vvr <br />e .orted . :.. ... .. :: Previrius ; :: 1Vo.. o <br />R <br />C. <br />... .. ... . ~ once tratians ~ ~ : ~ ~ ~ ~ ~ ~. Permit ~ ... ~Limitatwn ~ . <br />Parameter Avg/Min/Mas ' . limttatian '.. Escursions <br />Flow, MGD <br />30-day avg 0.0397/0.0069/0.0699 none <br />daily max 0.4176/0.2376/0.6336 none <br />