Laserfiche WebLink
Table 2.04.9 -2: Criteria for Pre -Mine Soil Evaluations (Original Soil Sampling) <br />PARAMETER - UNITS <br />pH <br />Conductivity (mmhos /cm) <br />Saturation percentage ( %) <br />Sodium adsorption ratio3 <br />Calcium carbonate percentage <br />Selenium (ppm) <br />Particle size <br />Coarse fragments ( %) <br />THRESHOLD LEVEL' <br /><6.1, >7.8 <br />4.O2 <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 quality 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 />3 Specific level depends upon clay mineralogy, soil texture, and saturation percentage according <br />to Dollhopf et al., 1983. <br />4 The specific percentage of clay or sand allowed will depend upon clay mineralogy, organic matter <br />content, consistence, soil lift, spoil characteristics, and size of sand fraction. <br />August 2013 (PR 08) 2.04.9 -11 <br />