Laserfiche WebLink
<br />Daub & Associates, Inc. Page 3-38 2015 NS Mine Plan Modification <br />1/5/2016 Section 3 General Site Conditions <br /> <br />Parameter Good Fai r Poor Unsuitable <br />pH 6.0 - 8.4 5.5 - 6.0 5.0 - 5.5 < 5.0 <br />8.4 - 8.8 8.8 - 9.0 > 9.0 <br />0-4 4-8 8-16 > 16 <br />> 8 may prove <br />difficult to <br />revegetate <br />> 80 <br />< 25 <br />Texture (a) s1, 1, sil, scl, <br />vfs1, fs1 <br />ci, sic1,sc, ls, lfs c, sic,s <br />SAR < 6 6-10 10 - 15 > 15 <br />10 - 12 (b) >12 (b) <br />Selenium < 2.9 ppm > 2.0 ppm <br />Boron < 5.0 ppm > 5.0 ppm <br />Calcium <br />Carbonante 0-15% 15-30% over 30% <br />Coarse Frag <br />3-10 in. 0 - 15 15 - 25 25 - 35 > 35 <br />(%, Vol ) <br />> 10 in. 0 - 3 3 - 7 7 - 10 > 10 <br />Moist <br />Consistency vfr, fr lo, fi vfi, exfi <br />Dry Consistency lo, so sh, h vh <br />(a) SCS. 1978. National Soils Handbook, Notice 24. <br />(b) For fine textured soils (Clay > 40%) (Gee et al., 1978). <br />Source: WDEQ (1981) <br />Saturation <br />Percentage <br />TOPSOIL SUITABILITY CRITERIA <br />EC <br />(Conductivity) <br />mmhos/cm <br />Suitable <br />25-80 <br /> <br />Table 3-10. Topsoil suitability criteria. <br /> <br />Long periods of stockpiling topsoil will cause some loss of microorganisms and <br />consequently, a loss of organic matter and nitrogen. During topsoil removal, some <br />subsurface materials will be mixed with topsoil and consequently will lower total soil <br />fertility. Some mixing of alkali material with topsoil material will occur. All these soil <br />conditions will be considered so the proper reclamation practices and mitigation <br />techniques are used.