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Table 2.04.6-5 WDEO Overburden Suitabilitv Criteria <br />Parameter Units Suitable Marginal Unsuitable <br />pH 5.5-8.5 5.0-5.5 <br />8.5-9.0 <br />5.0 <br />9.0 <br />Electrical Conductivity mmhos/cm 0-8 8-12 12 <br />Saturation 25-80 25 <br />80 <br />Texture clay, silty clay, silt <br />Sodium Adsorption Ratio 0-10 10-12 <br />10-15 <br />12 <br />15 <br />Selenium ppm 0.3 0.3 Not established <br />Boron ppm 5.0 5.0 <br />Molybdenum ppm 1.0 1.0 Not established <br />Nitrate as N ppm 50 50 <br />Aquifer restoration only <br />Acid -Base potential T CaCO3/ 1000 T 5 5 <br />Coarse Fragment vol 25% 25-35 35 <br />Taken from Wyoming Department of Environmental Quality, Land Quality Division Guidance for overburden geochemical suitability <br />For fine -textured soils only