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• <br />~!B Cyprus Yampa Valley Coal Corporation <br />An Allilufe of Cyprus Minerals Company <br />November 21, 1988 <br />David Berry <br />Colorado f4ined Land Reclamation Division <br />1313 Sherman Street, Room 215 <br />Denver, CO 50203-2273 <br />Dear Mr. Berry: <br />• III IIIIIIIIIIIII III <br />29587 Routt County Roatl M27 <br />Oak Creek, CO 80467 ' <br />Phone (303) 8793800 <br />I~~~.~FJ~~® <br />NOV 281988 <br />MINED LAruC) <br />DECLAMATION DIVISION <br />Re: Minor Revision 88-31 - Hydrologic Monitoring Parameter List at <br />Mines 1, 2, and Eckman Park: Permit C-81-071 <br />As discussed in our mutual written correspondence of September 16 and <br />26, 1988, Colorado Yampa Coal Company (CYCC) requests minor revision <br />approval to clarify three parameters listed on the hydrologic monitoring <br />parameter list. CYCC is clarifying the parameter list to show that calcium, <br />sodium and magnesium are analyzed as dissolved. CYCC and the U.S. <br />Geological Survey (USGS) have traditionally analyzed for major ions in the <br />dissolved phase. Analyses for major ions normally include the cations <br />calcium, magnesium, sodium and potassium. The important factors for <br />analyzing in the dissolved phase are the consistency (and comparability) <br />with long term data bases (USGS, CYCC) and the maintenance of analytical <br />integrity and balance of water samples collected and preserved in the <br />field. A final point is that dissolved calcium, sodium and magnesium are <br />essential components in the calculation of SAR. This revision is necessary <br />to eliminate the confusion surrounding calcium, sodium and magnesium. <br />Attached is a revised Table 101, Hydrologic Monitoring Parameter List. <br />If you have any questions or concerns, please call me. <br />Sincerely, <br />P~Q~~.-~ \~Qrcn <br />Richard Hughes <br />Environmental Specialist <br />RMH:dg <br />Attachments <br />~~~~ <br />