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- 18 - <br />1 <br />1 <br /> <br /> <br /> <br /> <br />1. The absence of ground water is verified by drilling <br />the monitoring wells during the period of snow melt. <br />2. Appropriate construction procedures are maintained <br />as will be discussed later. <br />3. The final, non-toxic cover is installed as an im- <br />permeable cover to prevent seepage of the surface runoff <br />into the pile. <br />4.5 CONSTRUCTION PROCEDURES <br />All topsoil should be removed from the foundation area <br />and stored for subsequent use. In addition, any materials <br />which could weaken or otherwise adversely influence the <br />foundation should be removed. These include such material <br />(in addition to topsoil) as unusually loose materials, vege- <br />table matter, including stumps and roots, and any other <br />perishable or objectionable materials that could reduce the <br />strength of the foundation. <br />After the topsoil removal, the foundation should be <br />graded so that no slope exceeds the gradient of 1 (v) <br />2.8 (h). The entire area should be free-draining and without <br />any local depression so that water could not pond or accumul.a <br />either prior to or during the construction of .the pile. Waste <br />rock should not be placed directly on ponded water, saturated <br />soil, snow or ice during construction of the pile. <br />The waste rock should be adequately compacted during con- <br />struction to prevent spontaneous combustion, to obtain adequat <br />strength, and to prevent excessive settlements. <br />~~wRO coswim+c, iNC. <br />