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41, <br />e <br />until good grass cover or other vegetation is established. The SWDD schedules <br />"policing" of blowing solid waste on the site and on the property and roads in the <br />vicinity of the site. Litter fences are installed adjacent to the active area to limit the <br />amount of wind-blown solid waste outside of the working fence area. These measures <br />prevent the introduction of solid waste into the stormwater collection/conveyance <br />systems. <br />The importance of good vegetative cover on slopes of the Segment 1 the infill segment, <br />and the Segment 2 landfill to prevent erosion cannot be overemphasized. The final <br />cover layer components installed on the sideslopes at these segments are engineered to <br />limit the amount of infiltration and subsequent production of leachate. The sideslope <br />vegetation also retards the overland flow velocity of stormwater runoff. The top <br />vegetation is designed to hold the upper foot of soil (non -barrier layer soil) together, <br />protecting the barrier layer and geonet drainage system underneath. Vegetation also <br />transpires moisture from the drainage layer reducing subsurface saturation. The <br />vegetation cover layer, especially on the 3:1 to 4:1 slopes of landfill cells must be <br />maintained to encourage root development for erosion control. The slopes should be <br />mowed as needed to encourage vigorous growth and to limit the introduction of bushes <br />and other brush. <br />Conveyance ditches vary in size from terrace ditches on the Segment 1 solid waste cell <br />sideslopes (2 to 3 feet wide) to the perimeter ditches (12 to 30 feet wide) at the bottom of <br />the landfill. Conveyance ditch maintenance is necessary to assure that local runoff is <br />collected efficiently and routed to the perimeter ditches, internal ditches, and the <br />stormwater pond. <br />F-34 <br />