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3.3.2.4 Engineering and Chemical Properties of Waste <br /> The engineering properties of municipal solids waste have been collected from literature. <br /> Physical properties include density, moisture content, particle size and distribution, field <br /> capacity, and porosity. Density varies because of the large variety of wastes, the degree of <br /> compaction, state of decomposition, and the amount of daily cover and total waste. In general, <br /> uncompacted waste densities can vary between 110 pounds per cubic yard (cy) for plastic to 550 <br /> pounds per cy for ferrous metals. When waste is compacted with soil, the NCRC&SL currently <br /> estimates that they are getting a combined density of 800 pounds per cubic yard and has an <br /> operating goal of boosting inplace densities to 1,100 pounds per cubic yard. <br /> The chemical properties of wastes are important if evaluating recovery options, especially when <br /> burned for energy recovery. The typical proximate values (moisture, volatile matter, and ash) as <br /> well as densities are shown in Table 5. <br /> North County RC&SL Page 14 of 48 Public Works/Solid Waste <br /> JTD County of San Joaquin—November 30,2004 <br />