ARCHIVED REPORTS_1988_6 - Laserfiche WebLink

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C C C • A 18 -inch -thick (minimum) top cover soil layer suitable for vegetative growth over the low -permeability soil Sufficient final cover soils are not available on site, but an on-site limited stockpile can be used for daily and intermediate cover. In the areas now at final grade, the final cover foundation layer has been placed; however, the thickness will be field -verified. Table 4 shows soil needs for continued operation and closure of the site. The soil quantities have been increased by 10 percent to allow for soil lost in excavation, hauling, and placement. These soils will be obtained from a private contractor or other sources. A stockpile for the needed soil will be developed starting in the fall of 1988. The top soil cover will be vegetated with the annual grass Panoche Red Brome to provide a plant growth coverage that limits erosion. The seeding and fertilization rates are 15 pounds per acre of Panoche Red Brome and 250 pounds per acre of 16-20-0 (N -P -K), as recommended by the Soil Conservation Service. The seed will be dry -broadcast on a scarified surface and then covered evenly with 2 tons per acre of straw mulch. The straw will be anchored in place by a crimping disk or a Caltrans -type straw roller. The vegetation selected should germinate without irrigation, reseed itself annually, and require minimum maintenance. By sequentially completing the landfill, the vegetation will be firmly established over a major portion of the site before final closure (Drawing 1). Throughout construction, a registered civil engineer will observe the work to document that all construction has been performed in accor- dance with the approved plans and specifications. The construction report prepared by the engineer will conclude the technical closure requirements and initiate the postclosure period. PJ9 9390310.00D 16 cmrrnn A�c,ai,.•e�