Laserfiche WebLink
III IIIIIIIIIIIII III <br />©,' <br />Twentymile Coal Company <br />29515 Routt County Road 1127 <br />Oak Creek, Colorado 80467 <br />(970) 879.3800 ~ ~ ~~ _ ~~ ~J <br />October 27, 2000 <br />Ms. Carla Lenkey <br />Colorado Department of Public Health and Environment <br />Water puality Control Division -Permits and Enforcement <br />4300 Cherry Creek Drive South <br />Denver, CO 80222-1530 <br />RE: PERMIT CO-0036684: 3R° QUARTER 2000 DMR SUBMITTAL <br />Dear Ms. Lenkey: <br />OCT 31 2000 <br />Division of Minerals & Geology <br />Please find enclosed the above referenced discharge monitoring reports for the period from July 1, 2000 through September <br />30, 2000. No permit limitation exceedences occurred during this quarter. <br />Quarterly Whole Effluent Toxicity (WET) tests were conducted for Out(all 001, indicating no toxicity to P. Promelas or C. Dubia. <br />The "Concentration with Statistically Significant Difference in Lethality" was >100°I° for both species. Copies of the CDPS <br />WET Test Report Forms for both species are included with this submittal. <br />The WET tests conducted this quarter required extra visits to this site, thus producing additional field parameter values which <br />were calculated into the statistics reported on the DMRs. <br />Outfall 001 is being tested for Hardness in addition to the required parameters. A copy of those results is included in this <br />submittal. <br />Please contact me at (970) 870-2750 for any further questions or additional information. <br />Twentymile Coal Company p- <br />Stephen L. Millei P.E. <br />Sr. Mining Engineer <br />enclosures <br />cc: DMG <br />CWPS Permit No. CO-0036684 file <br />