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Colowyo Coal Company, L. P. <br />5731 State Highway 13 //- Kennecott <br />Meeker, Colorado 81641 <br />(970)824-1531 ~ . Ener9Y. <br />(970) 824-1598 FAX <br />vn,r~e.,~:y Y <br />Kimberley A. Wolf Colowyo Caal Company L.P <br />Environmental Engineer ,y <br />April 20, 1999 <br />RECEIVED <br />Mr. Byron Walker qpR 21 9999 <br />Environmental Protection Specialist <br />Colorado Division of Minerals and Geology Df'~SionotMinerals&6eo1 <br />1313 Sherman, Room 215 ~ <br />Denver, CO 80203 <br />RE: COLOWYO COAL COMPANY L.P. (COLOWYO), CDMG PERMIT C-81-019; <br />BASELINE MONITORING PROPOSAL, SOUTH TAYLOR AREA <br />Dear Mr. Walker: <br />Colowyo Coal Company L.P. (Colowyo) is preparing to begin a baseline monitoring program for <br />surface and ground water associated with the South Taylor Area. The purpose of this letter is to <br />request the Division review the proposed sampling parameters for baseline water collection. <br />Please note we are proposing some exceptions from both the 1982 CMLRD Guidelines for baseline <br />sampling or the Water Quality Control Division regulations. One, we have not included dissolved <br />oxygen as a field parameter for surface waters as it is not a limiting water quality condition associated <br />with coal mining. Two, oil and grease monitoring will be visual only for surface water samples. Three, <br />we are proposing the analysis of the dissolved form of metals in ground waters, consistent with our <br />current operational monitoring plan. Lastly, we are proposing the analysis of the total recoverable <br />form of metals in surface waters, consistent with our current operational monitoring plan. <br />The proposed Sampling Parameters and Associated Minimum Detection Limits are shown in Table 1. <br />The Field Parameter List is shown in Table 2, and Monitoring Frequencies are shown in Table 3. <br />We request you review this proposed parameter list with the Water Quality Control Division to ensure <br />adequate interpretation of portions of the Water Quality Regulations. Please let us know at your <br />earliest convenience if this information is adequate. <br />We will be contacting your office in the near future to schedule a meeting to discuss our future South <br />Taylor mine plan expansion and the proposed ground water and surface water monitoring locations. <br />Sinc/ <br />xd~ 1~~ //~.C' <br />Kimberley A. Wolf C/~~ <br />Attachment <br />cc. MH Gibson <br />JA Kiger <br />C Begej - Greystone <br />