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88 <br /> Table 9-6. Chemical and Physical Properties of Stockpiled <br />• Topsoil at Nucla Mine, Montrose County, Colorado. <br /> ' Stockpile Location NumberZ <br /> Parameter Inhibitory <br /> Units Concentration 11 12 13 <br /> Sand, 8 >70 54.7 56.8 55.9 <br /> Silt, $ -- 18.2 16.4 24.0 <br /> Clay, ~ >40 27.1 26.8 20.0 <br /> Soll TextllTe3 5,15,C,SC,S1C SCl scl SCl <br /> Organic Mather, ~ -- 1.0 0.7 1.9 <br /> Saturation Percentage <25, >80 44.2 44.2 43.0 <br /> pH [-log(H+)] <5, >9 7.7 7.7 7.9 <br /> E.C.° <br />mmhos/cRn >8 2.0 2.7 0.7 <br /> , <br /> Sodium, meq/1 -- 1.0 1.1 1.1 <br /> Calcium, meq/1 -- 20.3 29.2 6.2 <br /> Magnesium, meq/1 -- 5.4 9.1 1.3 <br /> SARS >12 0.3 0.2 0.6 <br /> Sulfur, 8 -- 0.04 0.14 0.04 <br />. Acid Potential, ~ -- 0.13 0.44 0.13 <br /> Base Potential, 8 -- 7.06 8.08 5.93 <br /> Excess Hase, 8 >15 6.93 7.64 5.80 <br /> Molybdenum, ppm :>0.3 <1.0 <1.0 <1.0 <br /> Horon, ppm >8 0.6 0.6 0.5 <br /> Zinc, ppm >35 1.1 1.2 <1.0 <br /> Selenium, pPrn >2.0 <0.01 <0.01 <0.01 <br /> Nickel, ppm >1.0 <0.3 0.9 0.3 <br />'Parameter values listed are means of three datwn. <br />ZSee Map 2, Exhibit 9-2. <br />3s-sand; is-loamy sand; scl-sandy clay loam; c-clay; sc-sandy clay; and <br />and sic-silty clay. <br />°E.C. - Electrical Conductivity. <br />SSAR - Sodium Pdsorption Ratio. <br />• <br />