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86 <br /> TAB 9 <br /> ATTACHMENT 9-2B <br /> TOPSOIL STOCKPILE SOIL QUALITY <br /> INTRCDUCTION <br /> Topsoil soil quality was investigated for all stockpiles to deter- <br /> mine the plant medium characteristics. This investigation will <br /> identify the soils plant growth limitations which include acidity, <br /> alkalinity, potential toxicity, or other inhibitory characteristics. <br /> Topsoil quality ratings will be assigned to each stockpile. These <br /> ratings are based upon topsoil suitability guidelines established <br /> by the Wyoming Department of Environmental Quality and Montana <br /> Department of State Lands. <br /> METHODS <br /> Topsoil quality ratings for stockpiles 1 through 10 are contained <br /> in the Soil Survey, Tab 9. Additional soil samples were collected <br /> at topsoil stockpile sites 11, 12, and 13 (see Exhibit 9-2) on <br /> October 25, 1979 to determine their soil chemical and physical <br /> characteristics. The samples were shipped to and analyzed at <br /> Peabody's Central Laboratory in Freeburg, Illinois. Standard <br /> laboratory handling and analysis procedures were used (Appendix 6-3) . <br /> RESULTS <br /> The chemical and physical parameter concentrations for topsoil <br /> stockpile sites 11, 12, and 13 are listed in Table 9-6. Recom- <br /> mended inhibitory concentrations are also listed in Table 9-6. <br /> These chemical and physical values are all within the reccnm-ended <br /> concentration limits set for selecting suitable reclamation top- <br /> soil material. There are no excess salt or sodium problems nor <br />