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M98168GE • • <br />2.2 Site Conditions <br />The proposed plant site slopes down to the northwest at an <br />inclination of about twenty (20) to one (1) (horizontal to <br />vertical). The proposed plant site contains a medium dense cover <br />of Utah juniper and pinion pine trees and a ground cover of native <br />brushes. <br />2.3 Subsurface Conditions <br />The subsurface exploration consisted of observing, describing and <br />sampling the soil materials encountered in five (5) auger advanced <br />test borings at the proposed plant site. The approximate locations <br />of the test borings are shown on Figure 2. The logs describing the <br />soil materials encountered in the teat borings are presented in <br />Appendix A. <br />The soil materials encountered in the teat borings consisted of <br />silty and sandy clay material with some gravel to a depth of about <br />one (1) to three and one half (3-1/2) feet. The silty and sandy <br />clay soils may have a low swell potential when wetted and may <br />consolidate under light loading conditions. <br />Formational material was encountered in the teat borings at a <br />depth of about one (1) to three and one-half (3-1/2) feet. The <br />formational material was a sandy and clayey siltstone. The <br />formational material tested has a low swell potential when wetted <br />and may consolidate under heavy loading conditions. <br />Due to the very hard nature of the formational material we <br />anticipate that the samples of the formational material may have <br />been somewhat disturbed during the sampling process. The swell and <br />consolidation tests were performed on the samples tested to help <br />identify the swell potential of the samples tested however the test <br />results were not used to predict settlement. The settlement <br />analysis discussed below was based on the modulus of elasticity of <br />the formational material calculated from an unconfined compressive <br />strength tests performed of a rock core sample of the formational <br />material. <br />No free subsurface water was encountered in the teat borings at <br />the time of our field study. Due to the shallow nature of the <br />formational material we anticipate that temporarily perched free <br />subsurface water may exist on the surface of the formational <br />material during wetter seasons. <br />3 <br />~Lamberr ana ~~~ociate,~ <br />fgMlOITIMO Of OTlCYMI{'jl fYOMlffp BYO <br />WTf111tl I[lTIMO <br />