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Kennecott <br />Energy <br />Mine <br />November 5, 2004 <br />COLOVV'YO COAL COMPAA"S L.P. <br />C. Crellin Scott <br />RECEIVED <br />Ms. Carla Lenkey N~V 0 $ 204 <br />Colorado Department of Public Health and Environment <br />Water Quality Control Division Division ~f Minerals and Geology <br />4300 Cherry Creek Drive South <br />Denver, CO. 80222-1530 <br />RE: COLOWYO COAL COMPANY L.P. (COLOWPO); CDPS NO. CO-00045161 <br />REVISED THIItD QUARTER 2004 DISCHARGE MONTI'ORING REPORTS (DMR) <br />Dear Ms. Lenkey, <br />Colowyo is submitting the third quarter discharge monitoring reports to the Water Quality Control Division for calendar <br />yeaz 2004. Please find the DMR reports attached for your review. <br />Measurable discharge for the third quarter occurred at outfalls OOIA and 007A. Outfall OOIA discharged continuously <br />throughout the third quarter. <br />Field measurements of outflow were taken four times in July, four times in August and five times in September at <br />outfall 001 A. Outfall 007A discharged for approximately seven days in July. Field measurements of outflow were <br />taken twice during this period of time. Laboratory samples were taken at outfall 001 A in July (I sample), August (1 <br />sample) and September (1 sample). A single laboratory sample was taken at outfa11007A in July while the pond was <br />dischazging. <br />The laboratory sample taken at Outfall 007A on July 22 exceeded the allowances for Total Suspended Solids (114 <br />mglL) and Settleable Solids (3 ml(L*). Results from the laboratory sample taken at Outfall OOIA on August 10, <br />exceeded the allowance for Total Suspended Solids (230 mg/L). Please see the attached CDPS Exceedance Reports for <br />more detailed information about these exceedences. Water monitoring forms for these samples are also attached. We <br />believe that sampling errors were responsible for these exceedences. <br />Thank you for your consideration. Please feel free to contact me if you have any questions or concerns. I can be <br />reached at (970)824-1532. <br />Sinc~elyC/%/~~~ - <br />C. Crellin Scott <br />~.~- <br />Sr. Environmental Engineer <br />Encls. <br />C: CDMGByron W. w/encl <br />NPDES Reports Binder w/encl <br />Attachment <br />"Due to contusion created by the unit reported with Settleable Solids in the previous letter (October 20) regarding the submittal at Colowyo's 3'rd <br />Quarter 2004 DMR Reports, the unit has been modified to reOeM the proper presenmtton o[the Settleable Sonds concentration in the sample collected <br />from Onifea 007A on July 22, 2004. Additional eopiea of Colowyda 3'rd Quarter 2004 DhIR Reports are not being sent with this communintion. <br />C.F. 21.1.2 w/encl <br />s ~• .. - ,. _ _, ._~ _.. _ .. _ ~, ~ _ ee, <br /> <br />