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RULE 2 PERMITS
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<br />At each soil site, the following information was recorded: sample site number, date, soil series name, map
<br />unit number, location, soil classification, vegetation, pazent material, physiography, slope gradient (%)
<br />and aspect, erosion condition, moisture status at time of sampling, drainage class, depth to groundwater if
<br />encountered, salts or alkali if present, permeability, horizon designations and depths, soil color (dry and
<br />moist), texture, coarse fragment content, structure, consistence, roots, effervescence (presence of
<br />carbonates), and horizon boundary.
<br />Soil samples were collected from each major horizon and sub-horizon at the sample sites. Approximately
<br />two quarts of soil material per sample were collected into clean Ziploc plastic bags. Sample material was
<br />field screened over a #10, 2 mm, soil screen to provide improved estimates of coarse fragment content
<br />(percent by volume). Soil samples with hard clods, particularly in the "C" horizon substratum, were not
<br />field screened, although estimated coarse fragment content was recorded.
<br />Forty soil samples, collected from eleven sample sites, were delivered to Colorado State University's Soil
<br />Testing Laboratory in Fort Collins, Colorado, for standard analysis. The list of parameters included all
<br />tests that were analyzed for the previous South Taylor/Lower Wilson investigation completed by
<br />Greystone in 1999. The current laboratory analysis included:
<br />• pH;
<br />• Particle size (texture);
<br />• Saturation percentage;
<br />• Electrical Conductivity (EC);
<br />• Soluble Ca, Mg, and Na (meq/L);
<br />• SAR (calculation);
<br />• Lime estimate
<br />• Boron (mg/kg);
<br />• Selenium (mg/kg);
<br />• Organic Matter (Walkley-Black);
<br />• NO3-N;
<br />• P (phosphorus), ppm;
<br />• K (potassium), ppm;
<br />• Zn (zinc), ppm;
<br />• Fe (iron), ppm;
<br />• Mn (manganese), ppm; and
<br />• Cu (copper), ppm.
<br />An evaluation of soil suitability was conducted on all major soils in map units in the Lower Wilson
<br />mining area. The suitability of soils for use as topsoil during reclamation was determined in accordance
<br />with standard procedures in use in Colorado and adjacent states, particularly Wyoming (WDEQ, 1994).
<br />These guidelines are generally applicable to Colorado which has no state topsoil and overburden
<br />suitability guidelines and aze compared to criteria stated in Table 2.04.9-5.
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<br />South TaylorlLower W ilso° -Rule 2, Page 55 Revision Date: 3/30/07
<br />Revision No.: PR-02
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