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• <br />MINED LAND RECLAMATION DIVISION <br />Department of Nafura~ Resources <br />t 3t3 Sherman Sf.. Room 2t5 <br />Denver. CO 80203 <br />303 866-3567 <br />r•ax 303 832 Bt06 <br />June 15, 1990 <br />Mr. Murari Shrestha <br />Western Fuels Utah-Inc. <br />405 Urban Street, Suite 305 <br />Lakewood, CO 80228 <br />Re: Coal Refuse Revegetation Plots, File No. C-81-018 <br />Dear Mr. Shrestha: <br />o~~~~a <br />~ ' #~ <br />~ ~ ~9 <br />Neli.,,.e,r'a Iv <br />r8'!6 <br />Roy Romer, <br />Go~emor <br />Fretl R eama. <br />Dwisio~ Gregor <br />We received the coal waste and topsoil analysis from the sample Tim Chervick <br />and I split on April 24, 1990 as well as the additional subsoil analysis from <br />the sample Tim subsequently collected from sub area #4. <br />Though some variation exists between sample splits for certain parameters, <br />both refuse data sets indicate highly sodic, moderately saline material, No <br />apparent problems were indicated for topsoil or subsoil material. As I <br />indicated by letter of June 8, 1990, upward diffusion of salts into replaced <br />cover soils could be a potential reclamation concern. I would recommend the <br />following sampling be conducted upon completion of plot construction this <br />summer: <br />In both the north facing and south facing study area, at least one <br />representative sample should be taken from the 12" cover depth plots. <br />Also in both study areas, at least one representative sample should be <br />taken from each 12" cover soil increment in the 48" cover depth plots. <br />Sampling procedures and locations will need to be documented to allow for <br />valid comparison based on future sample results. Each sample should be <br />analyzed for texture, electrical conductivity and sodium adsorption <br />ratio. By repeating the sampling in future years, i4 should be possible <br />to determine whether any upward migration of salts is occurring. The <br />results should provide some indication of the rate and extent of upward <br />migration, if any, and the effect, if any, of soil depth and slope <br />exposure on salt migration. <br />Please let me know if you have any questions. <br />Sincerely, <br />,`~~ ~ -- <br />Dan T. Mathews <br />Reclamation Specialist <br />DTM/ern <br />cc: Jim Stevens, MLRD <br />Tom Gillis, MLRD <br />iiiiiiiiiiiiiiiiiii <br />STATE OF COLORADO <br />8043E <br />