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A <br /> r <br /> 4 <br /> R <br /> fast return stroke. The net effect is that the particles move diagonally across the table. Stratification is <br /> k enhanced by riffles that run along the long axis of the table parallel to the vibrations. The small, dense <br /> particles settle down quickly into the riffles near the feed end. These particles travel along the riffles to <br /> the side of the table. The coarser, lighter particles go over the riffles to the front of the table. <br /> z Concentrate, middlings, and tailings can be isolated as required by adjustable splitters placed along-the <br /> 3 <br /> z <br /> edges of the table. <br /> Sheet Piles—vertical groundwater barriers constructed by driving pilings into the formations. <br /> Short-Residence-Time, Intensive Mefters—these waste vitrification melters provide more intensive <br /> mixing, allowing the melter to be smaller. <br /> Short-Term Effectiveness—refers to the control of adverse impacts on human health and the <br /> environment posed during the construction and implementation of an alternative until cleanup goals are <br /> achieved. <br /> Silica Fume—very fine silica dust produced by condensation of silica fumes. <br /> Sludge—in this document, sludge means a viscous semisolid or fluid containing contaminants requiring <br /> treatment. The regulatory definition is any solid, semisolid, or liquid waste generated from a municipal, <br /> commercial, or industrial wastewater treatment plant, water supply treatment plant, or air pollution <br /> control facility with the exception of specific exclusions such as the treated effluent from a wastewater <br /> treatment plant (40 CFR 260.10). <br /> Slurry Walls—are constructed in a vertical trench excavated under a slung. <br /> Soil—loose material on the surface of the earth, as distinguished from solid rock, consisting of mineral <br /> grains and organic materials in varying proportions. <br /> Soil Flushing— involves extraction and injection of aqueous solutions to remove contaminants from the <br /> subsurface without excavation of the contaminated materials. <br /> Soil Washing—a broad term often used to describe any system that effects a physical or chemical <br /> separation/concentration of contaminants using a fluid. <br /> Solid Waste— see RCRA solid waste. <br /> t <br /> Solidification—a process in which materials are added to the waste to convert it to a solid or to simply <br /> j improve its handling and physical properties. The process may or may not involve a chemical bonding <br /> between the waste, its contaminants, and the binder. In solidification, the mechanical binding of <br /> contaminants can be on the microscale (microencapsulation, absorption, or adsorption) or the <br /> t macroscale (macroencapsulation). <br /> Solidification/Stabilization (S'S) —used in this document to encompass the variety of processes that <br /> may contribute to increased physical strength and/or contaminant immobilization. <br /> Solubility—the maximum concentration of a substance dissolved in a solvent at a given temperature. <br /> Solubility Product—a type of simplified equilibrium constant defined for and useful for equilibria <br /> between solids and their respective ions in solution. <br /> Soluble Threshold limit Concentration (STLC) —limit applied to Cal WET leaching results (Ca 22 <br /> California Code of Regulations 66699). <br /> K-13 <br />