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Total Waste Analysis (TWA)-total concentration of priority pollutants, organics, and metals in the <br /> waste <br /> Toxicity Characteristic-exhibiting the hazardous characteristic of toxicity as defined in 40 CFR 261.24. <br /> Toxicity Characteristic Leaching Procedure (TCLP)-the primary leach testing procedure required by <br /> 40 CFR 261.24 and the most commonly used test for degree of immobilization offered by an S/S <br /> process. <br /> Transportation-the movement of hazardous waste by air, rail, highway, or water (40 CFR 260.10). <br /> Treatability Study-a study in which hazardous waste is subjected to a treatment process to determine: <br /> (1) whether the waste Is amenable to the treatment process, (2) what pretreatment (If any) is required, <br /> (3) the optimal process conditions needed to achieve the desired treatment, (4) the efficiency of a <br /> treatment process for a specific waste or wastes, or (5) the characteristics and volumes of residuals from <br /> a particular treatment process (40 CFR 260.10). <br /> Treatment-any method, technique, or process, including neutralization, designed to change the <br /> physical, chemical, or biological character or composition of any hazardous waste so as to neutralize <br /> such waste, or so as to recover energy or material resources from the waste, or so as to render such <br /> waste nonhazardous, or less hazardous; safer to transport, store, or dispose of; or amenable for <br /> recovery, amenable for storage, or reduced in volume (40 CFR 260.10). <br /> Triaxial Compression- compression caused by the application of normal stress in lateral directions <br /> (ASTM D 653, p. 152). <br /> Triaxial Shear Test (triaxial compression test) -a test in which a cylindrical specimen encased in an <br /> impervious membrane is subjected to a confining pressure and then loaded axially to failure. <br /> Trommel-cylindrical screen rotated around its centerline, used to attrition scrub and physically grade <br /> coarse particulates. <br /> Unconfined Compressive Strength (UCS)-the load per unit area at which an unconfined cube or <br /> cylindrical specimen of material will fail in a simple compression test without lateral support. <br /> Vertical Barriers-when placed at the perimeter of a metal-contaminated site, can reduce movement of <br /> contaminated groundwater off site or limit the flow of uncontaminated groundwater through the site. <br /> Vitrification Technologies-technologies that apply high-temperature treatment aimed primarily at <br /> reducing the mobility of metals by incorporation in a vitreous material. <br /> Vegetative Uptake- metals are concentrated as they are taken up through the root systems of plants <br /> and deposited in the leaves. <br /> Volatile Organic Compound (VOC)-an organic compound with a low boiling point. <br /> Waelz Kiln-a rotary kiln used to vaporize cadmium, lead, and zinc from a complex oxide/silicate <br /> matrix and recover the vaporized metals as mixed oxide condensed fume. <br /> Wastewater-the water media group includes groundwater, surface water, and contaminated washwater <br /> or process water from sols, sediments, and sludge treatment processes. <br /> K-15 <br />