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iiiiiiiiiiiiiiiiii <br />Doc Date:12/11I2001 <br />~ X~;~ l/oG 3 <br />STATE OF COLORADO <br />Roy Romer, Governor <br />Patti Shwayder, Executive Director <br />Dedicated to protecting and improving the health and environment of the people of Colorado <br />4300 Cherry Creek Dr. 5. Laboratory and RadiaOon Services Division <br />Denver, Colorado 80246-1530 8100 Lowry BHd. <br />Phone (303) 692-2000 Denver CO 80220-6928 Z <br />Located in Glendale, Colorado (303) 692-3090 ~ /~~ , `I Q /~ <br />http://www.cdphestate.co.us ~~ ~ ~ 1/ <br />Water Quality Control Division ' <br />WQCD-PERMITS-B2 A <br />(303) 692-3500 FAX (303) 782-0390 l{.' <br />November 14, 1997 <br />Jerry H. Koblitz <br />Greystone <br />5990 Greenwood Plaza Blvd. <br />Englewood, CO 80111 <br />RE: Chemical Review <br />Picketvvire Processing, LLC -New Elk Mine <br />CDPS No. CO-0000906 <br />Las Animas County <br />Dear Mr. Koblitz: <br />~~Qp. <br />„s <br />a <br />•.__.. s <br />Colorado ent <br />of Public Haltb <br />and Fnvirortmrnt <br />• The Division has reviewed your request for use of a chemical in waters that will or may be discharged to <br />waters of the state from the above referenced facility. <br />• Nalco 7888 Clariticatioa Aid: The aquatic toxicity data supplied in the Material Safety Data Sheet <br />(MSDS) for this chemical show that it is essentially non-toxic to slightly toxic to aquatic life. The proposed <br />application rate is 50 ppm. The only aquatic species that appears affected at this rate is Ceriodaohnia <br />dubia• Since the chemical is a flocculant, most of it is expected to remain with sludge and not be <br />discharged with the effluent. So, it is likely that the concentration in the discharge would be nontoxic to this <br />species as well. <br />On this basis, it is acceptable for use in wastestreams that may be discharged to state waters. We will approve <br />this chemical for use at application rates recommended by the manufacturer. Please contact me at (303) 692- <br />3605 if you have questions. <br />~~,~~- <br />Jon C. Kubic <br />Environmental Protection Specialist <br />Permits Unit, Water Quality Protection Section <br />xc: MS-3 File <br />EPA Technical Enforcement Program (8ENF-T) <br />Local Health Deparunent <br /> <br />