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Table 2 <br /> <br />Criteria for Evaluating Soil Suitability <br />Pa rameter-Unitsl Suitability Leve12 <br /> pH 5.0-8.5 <br /> Conductivity (mnhos/an)a 0.0-8.0 <br /> Saturation percentage (S) 26-80 <br /> 4 <br /> Sodium adsorption ratio 0-10 . <br /> Calcium carbonate percentage 0-IS <br /> e <br /> Particle siz All soil textures except: <br /> s, 15, sic, c, and se <br /> (greater than 40~e) <br />• Rock fragments (3) 0-35+ <br /> per 1000 tons of topsoil <br />ABP, tons CaC0 -5-15 <br /> 3 <br /> Boron Ippm) 0.5-5 <br /> Copper (ppm) 0.5-30 <br /> Zinc (ppm) 1.0-70 <br /> Molybdenum (ppm) 0.0-1.0 <br /> Selenium (ppm) 0.0-0.1 <br /> 1 <br /> Secondary 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 [o 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 /> 3 <br /> The actual maximum acceptable salt level will depend on the olant species proposed in the <br /> revegetation plan and the potential for upward salt movement. <br /> 4 <br /> 5peci fic level depends upon clay mineral ogy, soil texture, and saturation percentage <br />. <br /> according to Dollhopf, 1983_ <br /> SThe specific percentage of clay or sand allowed will depend upon clay mineralogy, organic <br /> matter content, consistence, spoil chara cteristics, and size of sand fraction. <br />