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JD-6 Mine Report
<br />Geoscience Services
<br />Even using such conservative assumptions, results of the modeling simulations
<br />showed that no contamination reached the underlying groundwater system. For all of the
<br />analytes tested, none will migrate through the Salt Wash Member of the Morrison
<br />Formation. The Summerville Formation provides an additional bamer preventing the
<br />constituents of concern from impacting the groundwater in the underlying Entrada
<br />Sandstone.
<br />In summary, mining operations at the JD-6 mine poses no significant threat to
<br />groundwater resources in the area.
<br />References
<br />ACRi, 2000, PORFLOW Users Manual, Version 4.Q, Rev. 4, Bet Air, California.
<br />Blumb, A. C., C. L. Murphy, and L. G. Everett, 1992, "A Comparison of Three Functional Forms
<br />for Representing Soil Moisture ChazacteriStics," Ground Water, Vol. 30, No. 2, pp. 175-
<br />185,
<br />Cater, Fred W., 1955. Geologic Map of the Naturita NW Quadrangle, Colorado. U. S.
<br />Geological Survey Map GQ 65, Washington D.C.
<br />Freeze, R.A., and J.A. Cherry, 1979. Groundwater. Prentice Hall, Inc. New Jersey.
<br />Lohman, S. W., 1965. Geology and Artesian Water Supply Grand Junction Area Colorado.
<br />Geological Survey Froffesional Paper 451, Washingron, D.C.
<br />Sheppard, M. L, and D. H. Thibault, 1990. Default Soil Solid/Liqutd Partition Coeffrcieuts, K,ts,
<br />for Four Major Soi! Types: A Compendium. Health Physics, Vol. 59, pp. 471-482.
<br />Van Genuchten, R., 1978, Calculating the Unsaturated Hydraulic Conductivity with a New
<br />Closed-Form Analytical Model, Princeton University, Rpt. 78-WR-08, Department of Civil
<br />Engineering, Princeton, New Jersey.
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