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<br /> <br />Foothill Sanitary Landfill Page 21 of 52 San Joaquin County DPW - Solid Waste <br />Joint Technical Document Revised 01/05/2026 <br /> <br />5.4.1. Cover Materials <br />On-site soil will be used as cover for operations layer, daily cover, intermediate cover <br />and closure cap (Tables 3 and 4). Soil for cover will be excavated from the borrow areas of <br />each module (Figure 5). The on-site soil meets the requirements for operational use at the <br />Landfill as well (Appendix D and E). <br /> <br />5.4.2. Cover Frequency <br />Refuse is covered daily. <br /> <br />5.4.3. Intermediate Cover <br />Intermediate cover is placed on surfaces that are not scheduled to receive refuse for 180 <br />days or more. Intermediate cover is typically placed with a 623 scraper from the soil stockpile <br />and spread on the refuse and side slopes. Bulldozers are used on occasion to help spread the <br />soil evenly throughout. <br /> <br />5.4.4. Alternate Daily Cover <br />Foothill Landfill deploys tarps as alternate daily cover (ADC). Tarps are the only <br />approved ADC used at this time (2020). When used, the tarps are removed from the surface of <br />the working area at the beginning of each work day, and placed over the new refuse lift at the <br />end of the day. If the landfill is closed for longer than 24 hours, then soil will be used for cover <br />to comply with Section 20690. <br /> <br />5.4.5. Beneficial Reuse <br />Beneficial reuse at the site includes use of inert materials (demolition debris, etc.) for the <br />construction of roads and winter pads. <br /> <br />Loads that have exclusively inorganic materials (concrete, rebar) may be stored up to <br />180 days for use in building roads and winter pads. Non-putrescible materials, which include <br />mixed demolition materials such as wood, shingles, plasterboard, may be stored up to 14 days <br />before being covered. <br />