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-iii iiiiiiiiiiiiiiii <br />999 <br />C c~~us <br />"'a Yampa Valley <br />Cyprus Yampa Valley Coal Corporation <br />29587 Routt County Road #27 <br />Oak Creek, Colorado 80467 <br />303-679-3800 <br />September 22, 1998 <br />Ms. Carla Lenkey <br />Colorado Department of Public Health and Environment <br />Water Quality Control Division - Permiu and Enforcement <br />4300 Cherry Creek Drive South <br />Denver, CO 80222-1530 <br />RE: P RMiT CO-0027154: A ST 1998 DMR MiTTA . <br />Dear Ms. Lenkey: <br />RECEIVED <br />SEP 2 5 i~~9 <br />DIV. OF MINFae~ c <br />Pleaze find enclosed the above referenced discharge monitoring report for the period from August ], 1998 through <br />August 31, 1998. Two permit limitation exceedences aze reported for this period. <br />Outfall 003 incurred a permit limitation exceedence on 8/4/98 for the monthly maximum of Total <br />Suspended Solids. An exceedence for the monthly average waz also incurred due to the high value from 8/4/98. <br />The field notes for that day describe the sample water az dark and murky and having a flow rate of only 0.04 mgd. <br />Two samples were taken at the end of August, having TSS values of 6 and 18, well within the required limitations <br />that this Outfall typically demonstrates. <br />Outfall 001 shows an extra value for the Silver parameter, due to in-house sampling being done at the time. <br />Outfalls 002, 004, 006, 007, 008, 009 and 017 did not discharge during this period. Outfall 020 haz not been <br />constructed yet; therefore, there is no discharge to enable chemical or toxicological testing co date. <br />Outfalls 001, 005, and 007 are being tested for Hardness in addition to the required parameters. TCC is conducing <br />some internal sampling to further explain some issues that have previous]y been in question with the NPDES <br />requirements. A copy of these results is included in the submittal. <br />Please contact me at (970) 879-3800, act. 2805 for any further questions or additional information. <br />COLORADO Y~A COAL C~ 1 <br />ephanie S. Cart ~ <br />Environmental Specialist ~' <br />enclosures <br />cc: DMG <br />CWPS Permit No. CO-0027154 file <br />