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_2- <br />• the unground material which indicates a low water holding potential. <br />The less than 1 mm fraction would have a much greater water holding <br />potential as indicated by the relatively fine texture. The percent <br />organic matter is relatively high, probably due to the abundance of <br />coal in the material. <br />The pH of the samples is high when compared to agricultural soil, <br />and sample number 2 has a pH sufficiently high so as to restrict <br />the growth of plant roots into the material. Salt content is low as <br />evidencedby low electrical conductivities. The sodium adsorption ratios <br />(SAR) of the samples are high, although there are not sufficient <br />concentrations of sodium to warrant a hazard. <br />Essentially no nitrate- nitrogen was detected; however, phosphorus <br />and potassium are present in quantities sufficient to support plant <br />growth. Relatively low concentrations of iron, manganese, copper <br />and zinc were found with the exception of the iron content in sample <br />number 2. <br />No hazards are presentedby the extremely low concentrations of <br />heavy metals in the samples. <br />Conclusions <br />The samples as tested indicate a relatively low potential for <br />pollutant hazards. The somewhat higher concentrations of chemical <br />constituents in sample number 2 may be the result of a small pocket <br />of more concentrated elements found in that particular geologic stratum. <br />• <br />