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• D.5.3 Rock Mechanics and Subsidence Monitoring <br />dock mechanics data specific to the site are currently being developed. <br />This information will be supplied under separate cover. <br />In the unlikely event that subsidence should occur, any surface expression <br />of subsidence will be monitored. Details of the monitoring program will <br />also be forthcoming under separate cover. <br />D.5.4 Erosion Control <br />The total disturbed area associated with the Pilot Plant operations is 13.9 <br />acres. Of this total, 7.9 acres represent the evaporation ponds, 2.4 acres <br />represent the well field, 2.4 acres represent the topsoil stockpiles, and <br />the remaining 1.2 acres are associated with the plant site. The plant site <br />area will be leveled, and parking areas will be graveled. Drainage control <br />• ditches, as shown on figure D-1, will be constructed to divert precipitation <br />runoff from undisturbed areas to the dry drainage. Precipitation runoff <br />from disturbed areas +3nd the plant site will be intercepted by ditches, and <br />will be directed to the retention pond for desiltation and subsequent <br />discharge to the dry drainage. Any disturbed slopes steeper than 30 percent <br />will be stabilized with water bars and contour furrowing. Topsoil storage <br />piles will be seeded to protect against erosion (see Exhibit E). <br />Erosion control measures such as water bars, culverts, windrowing, and <br />contour furrowing will be utilized, as required, to control erosion along <br />the plant access road. Cut and fill areas will be contoured, seeded, and <br />mulched to minimize Erosion. Ditches along the road will be constructed <br />with energy absorbers to regulate flow velocity and prevent excessive <br />erosion. Rock rip-rap will be installed at the culvert out-falls to <br />dissipate energy and prevent erosion. <br />D.5.5 fugitive Dust Control <br />• The only source of fugitive dust associated with the operation of the Pilot <br />Plant relates to vehicle traffic induced emissions. The access road and the <br />D-14 <br />