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c <br />'~. materials in terms of inherent fertility status. As noted in section 2.1, samples were not analyzed for <br />saturation percentage or organic carbon. <br />TABLE 5 <br />~o- SUMMARY OF LABORATORY ANALYSES-JULY, 1994 SAMPLING PROGRAM <br />(:~ <br />tea. <br />Range of Range of <br />'°" Parameter Values Parameter Values <br />pH 5.7-8.8 P (ppm) 0.3-4.4 <br />f(. 7 Electrical conductivity (mmhos/cm) 0.4-4.4 K (ppm) 90.0-696.0 <br />e'=' Percent organic matter 0.5-53.9 Zn (ppm) >0.1-19.5 <br />Lime estimate Low-medium Fe (ppm) 6.3-113.0 <br />Acid base potential (ABP) 4.16-24.88 Mn (ppm) 0.5-52.1 <br />Texture Sandy loam-sandy clay Cu (ppm) 0.8-16.7 <br />Sodium adsorption ratio (SAR) 0.8-7.1 B (ppm) 0.16-0.64 <br />:;, <br />NO3-N (ppm) <1.0-7.0 Se (ppm) <0.008-0.612 <br />fFfp+; Coarse fragment content (% by vol.) <5-95 <br />F~ Note: Typical organic matter percentages range from 0.5 to 7.8. Values of 31.5 and 53.9 based on <br />"weight loss on ignition" procedure and represent undisturbed coal seam material. <br />~~ 3.2.1 Chemical Parameters <br />3 <br />:~i Chemically, all overburden and soil material samples display numerical values within the range classed <br />4 as "suitable" for a topsoil substitute, with few exceptions. Wyoming guidelines (Land Quality Division <br />:/j 1989) indicate that pH values within the range of 5.5 to B.5 are suitable for materials to be used as a topsoil <br />substitute. All values for the July sample set ranged from 5.7 to 8.5 with the exception of one sample with <br />a value of 8.8. This sample, though having a slightly excessive pH value, also exhibits a low electrical <br />conductivity (EC) value, low lime estimate, and a suitable (5.2) SAR. Therefore, it is not believed that this <br />material will pose a problem with respect to reclamation potential. The Wyoming guidelines also rank <br />~~ material suitable if the EC value is below a value of 8.0. The maximum EC value for the 60 samples <br />collected is 4.4, well below the Wyoming suspect level. Wyoming guidelines for establishing overburden <br />~, suitability indicate that an acid base potential in excess of -5 tons of CaCO3 equivalenU1,000 tons of <br />material is a suitable level. All values Tor the samples collected in July exceed this value and range from <br />}; 4.16 to 24.88 CaCO3 equivalent/1,000 tons. The suspect level for B is 5.0 ppm with values in excess of <br />~'' S.0 considered to represent unsuitable material. Values for the 60 collected samples range from 0.16 to <br />0.64 indicating that all sample materials can be considered suitable. Values for Se typically range from <br /><0.008 to 0.079, all of which fall into the suitable category. Two samples exceeded the 0.1 suitability limit <br /> <br />9 <br />x~ <br />