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Foothill Landfill <br />Storm Water Pollution Prevention Plan <br />Page 44 <br />Row <br />No.Minimum Permit Requirement Facility-Specific Implementation <br />containers that can be contaminated by contact <br />with industrial materials or wastes. <br />8.1.5 Erosion and Sediment Controls <br />Foothill Landfill covers approximately 800 acres; of <br />which approximately 670 acres are intended for <br />waste disposal. The remaining area is comprised of <br />the parking lots, access roads, storm water <br />conveyance systems, sediment basin, setbacks for <br />environmental monitoring, and firebreaks. Most of <br />the facility and the areas permitted to receive refuse <br />consist of either permeable surfaces with a <br />vegetative cover to minimize erosion or minimally <br />paved withcrushed rock. The climate is “semi-arid” <br />with the approximate average annual precipitation <br />near the landfill of 18 inches. The landfill is not <br />irrigated and, therefore, the surface vegetation <br />becomes dormant in the dry months. Annual and <br />perennial grasses include California Brome, rye, <br />fescue, and clover. <br />Daily cover material is obtained by excavating from on-site borrow areas or stockpiled soil or <br />by the use of tarps. Waste is covered with a minimum thickness of six inches of soil and/or <br />with tarps at the end of each operating day to control vectors, fires, odor, blowing litter, and <br />scavenging. Daily cover reduces percolation of liquids through the waste. <br />Intermediate cover, consisting of at least 12 inches of soil in addition to daily cover, is placed <br />on surfaces of the fill where no additional refuse will be placed within 180 days. <br />CASQA <br />Reference <br />No. <br />Soil Erosion <br />BMPs <br />CASQA <br />Reference <br />No. <br />Soil Erosion <br />BMPs <br />EC-1 Scheduling EC-8 Wood <br />Mulching <br />EC-3 Hydraulic <br />Mulch EC-9 <br />Earth Dikes <br />and <br />Drainage <br />Swales <br />EC-4 Hydroseeding EC-10 <br />Velocity <br />Dissipation <br />Devices <br />EC-5 Soil Binders EC-11 Slope <br />Drains <br />EC-6 Straw Mulch EC-12 Streambank <br />Stabilization <br />Table 8.1.5.A – Erosion Control BMPs <br />Figure 17 – Vegetated slopes, down-slope <br />piping, and vegetated swales help prevent <br />erosion of landfill slopes and conveyance <br />swales.