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~y . • • <br />PEAEODY COAL COMPANY <br />Wsetern Dlvltlon ; ; ,,. <br />i .~.. <br />Vii, i3 a~r.~ <br />.. ,.a~~ <br />"''~ ' ~ ~` `' ,,:+November 4, 1987 <br />o ~ ,~= .. <br />Mr. Peter O'Connor :~ <br />Colorado Mined Land Reclamation Division <br />423 Centennial Building <br />1313 Sherman Street <br />Denver, CO 30203-2273 <br />RE: Changes in Water Quality Parameters Monitored at <br />Peabody's Colorado Mines <br />Dear Mr. O'Connor: <br />As a result of <br />and discussions <br />MLR, Peabody he <br />quality sample <br />Colorado mines. <br />agreed upon. <br />changes to the Colorado stream standards <br />with John Duerfer and Steve Renner of the <br />s revised their ground and surface water <br />parameter and analysis lists for their <br />The following documents the major changes <br />1. Phosphorous as phosphate ana Si0 will be dropped <br />from the ground water parameter lit. _ <br />2. Total phosphorous, Si0 and-oil and yrease will be <br />dropped from the surfac22 water parameter list. <br />1300 Sauth Vale <br />Flagaraff, Arizona 86001 <br />(602) 774-5253 <br />~°r~ <br />,~ <br />,~r'~ • ~ <br />3. Orthophosphate will be added to the surface water <br />parameter list. <br />4. Ba, Ni, Ag, Cr, S and NO /N will be added to the <br />ground and surface water parameter lists. <br />5. Li, Be, Co and V will be analyzed for in ground water <br />samples representative of each aquifer at etch mine. <br />These parameters will be analyzed for onlyronce. <br />~~ <br />6. Ca, Mg, Na and K in surface water samples will be <br />analyzed as dissolved concentrations rather than <br />totals. <br />7. Trace metals in surface water samples will be <br />analyzed as total recoverable concentrations rather <br />than totals analyses involving a more rigorous <br />digestion. <br />~.:~r~ <br />