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or amount of contaminants at the site. The primary goal of any treatment technology should be to <br /> adequately safeguard human health and the environment. <br /> Refractory Bricks—high-performance ceramic materials used to line high-temperature processing <br /> equipment <br /> Remedial Investigation/Feasibility Study (RI/FS)—see Remedial Investigation (RI) or Feasibility Study <br /> (FS). <br /> Remedial Investigation (RI) — a process undertaken by the lead agency to determine the nature and <br /> extent of the problem presented by a CERCLA site (40 CFR 300.430(d)). <br /> Remediation Manager (RM) —the official designated by the lead agency to coordinate, monitor, or <br /> direct remedial or other response actions under subpart E of the NCP (40 CFR 300.5). <br /> Residual Liiquid —free liquid remaining in the S/S-treated waste after treatment. <br /> Responsible Party (RP)— persons or corporate entities found to be responsible for contamination and <br /> cleanup at a CERCLA site. <br /> Retorting —thermal treatment to extract a metal from a solid matrix by vaporization. <br /> Roasting —thermal treatment to effect a chemical change prior to smelting. For example, heating <br /> mercury compounds to form mercury metal or heating metal sulfides in air to form metal oxides. <br /> ROD —see Record of Decision. <br /> Rotary Kiln—a cylindrical kiln with the axis Inclined at a slight angle. The kiln rotates around the axis. <br /> Scanning Electron Microscopy (SEM)—a microcharacterization method. <br /> Screening —the process of segregating solids according to particle size by passing the solids through a <br /> sieve with specifically sized openings. <br /> Sedimentation—the settling of solid particles in water. <br /> Separation/Concentration Treatment Options—separation/concentration technologies employ <br /> physical, chemical, or thermal processes to separate contaminants from the associated medium. These <br /> technologies do not alter the fundamental nature of the contaminant toxicity or mobility, but rather <br /> function to collect contaminants Into a concentrated form and smaller volume or to transform them into <br /> a different medium (such as by soil washing) that is easier to handle for further treatment and disposal. <br /> Sequential Chemical Extraction (SCE) —a leaching test with a variety of aqueous chemicals used <br /> sequentially to characterize the contaminant bonding. <br /> Sequential Extraction Test (SET) —a leaching test with a series of sequential acid extractions used to <br /> determine the sample buffering capacity. <br /> F <br /> Shaking Table—the shaking table operates according to a principle similar to that of the spiral ' <br /> concentrator. This device consists of a slightly inclined deck to which a 25% solids slurry is introduced <br /> at the higher comer. The flowing film separates the small dense particles (which move quickly to the <br /> lower, slower-moving layer of the film) from the coarse, light particles as shown in Figure 4-14. The ` <br /> effect Is enhanced by vibrating the table at right angles to the water flow in a slow forward stroke and a <br /> ) <br /> K-12 <br />