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<br />' Table 2 <br />1 • <br /> Criteria for Evaluating Sail Suitability <br />Parameter-Unitsl Suitability Leve12 <br /> 0-B <br />5 <br />S <br /> . <br />pH <br />. <br /> Conductivity (mmhos/cm )' 0.0-8.0 <br /> 26-BO <br />~ <br /> Saturation percentage ( <br />) <br /> 4 <br /> Sodium adsorption ratio 0-10 <br />' Calcium carbonate percentage 0-15 <br /> S <br /> All soil textures except: <br />Particle si ze <br />' s, ls, sic, c, and sc <br /> (greater than 40 ec) <br /> Rock fragments (~) 0-35~ <br /> ABP, tons CaC0 <br />per 1000 tons of topsoil -5-15 <br /> 3 <br />' Boron (ppm) O.S-S <br /> Copper (ppm) 0.5-30 <br /> Zinc (ppm) 1'.0-70 <br />' 0-1 <br />m) 0 <br />0 <br />M <br />l <br />bd <br />( <br /> . <br />. <br />y <br />enum <br />pp <br />o <br /> Selenium (ppm) 0.0-0.1 <br />' lSecondary suitability criteria including depth to bedrock, depth to ground water, <br /> consistence, organic matter content, and slope steepness were also utilized to determine <br />' topsoil salvage depths. <br /> 2 <br />The threshold levels are to be used as a guide in evaluating the suitability of a soil <br /> material for reclamation. An evaluation should take into account the "total system". <br /> Interactive parameters may either nullify or verify the significance of a potential <br /> problem. <br />' 3The actual maximum acceptable salt level will depend on the plant species proposed in the <br />' revege to tion plan and the potential for upward salt movement. <br />4 <br /> 5pecific level depends upon clay mineralogy, soil texture, and saturation percentage <br /> according to Dollhopf, 1983. <br />' SThe specific percentage of clay or sand allowed wilt depend upon clay mineralogy, organic <br /> matter content, consistence, spoil characteristics, and size of sand fraction. <br /> <br />