Laserfiche WebLink
<br />Topsoil salvage depths were based on average depths to the suspect parameter or average profile <br />depths (if the entire profile was suitable) across the study area based on numerous soil profile <br />descriptions obtained for each soil type. <br />Table 2.04.9-2 <br />Criteria for Evaluating Soil Suitability <br />PARAMETER -UNITS <br />THRESHOLD SUITABILITY LEVEL' <br />PH <br />Conductivity (mmhos/cm) <br />Saturation percentage (%) <br />• Sodium adsorption ration <br />Calcium carbonate percentage <br />Selenium (ppm) <br />Particle size° <br />Coarse fragments (%) <br /><8.1->7.8 <br />4.02 <br />>80% <br /><25% <br />>4 <br />15% <br />>2 ppm <br />All soil textures except: <br />s, Is, sc, sic, c <br />15%5 <br />' The threshold levels are to be used as a guide in evaluating the suitability of a soil material for <br />reclamation. An evaluation should take into account the "total system". Interactive parameters <br />may either nullify or verify the significance of a potential problem. <br />2 The actual maximum acceptable salt level will depend on the plant species proposed in the <br />revegetation plan and the potential for upward salt movement. <br />s Specific level depends upon clay mineralogy, soil texture, and saturation percentage according <br />• to Doilhopf et al., 1983. <br />(Revised march zoos) 2.04.9-13 <br />