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<br />Table 80 <br />Wyoming DEQ Guidelines for <br />Suitability Ratings for Soils as Sources of Topsoiling Material <br />v <br />N <br />0 <br />10 - 15 <br />high <br />(over 30%) <br />very firm <br />very hard <br />Soil Characteristic <br />pH 1/ <br />Conductivity (Ec) <br />mmhos/cm @ 25° <br />Saturation Percent- <br />age (SP) <br />Texture class <br />Sodium Adsorption <br />Ratio (SAR) <br />Calcium Carbonate 2/ <br />Moist Consistence <br />Dry Consistence <br />Selenium 3/ <br />Boron 4/ <br />Degree of Soil Suitability <br />Good Fair Poor <br />6.0 - 8.4 5.5 - 6.0 5.0 - 5.5 <br />8.4 - 8.8 8.8 - 9.0 <br />Under4 4-8 8-16 <br />25 - 80 Over 80 <br />Under 25 <br />sl, 1, sil, cl, sicl, c, sic, s <br />scl <br />Under 6 <br />none - slight <br />(0 - 15%) <br />friable <br />loose, soft <br />sc, is <br />6 - 10 <br />moderate <br />(15 - 30%) <br />loose, firm <br />slight hard, <br />hard <br />2 ppm or less <br />5 ppm or less <br /> <br />Unsuitable <br />Under 5.0 <br />Over 9.0 <br />Over 16 <br />Over 15 <br />greater than 2 ppm <br />greater than 5 ppm <br />