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Containment Technologies— reduce the mobility of metal contamination through construction of <br /> physical barriers (containment) to reduce the flow of water through contaminated media ru the flow of <br /> contaminated groundwater. <br /> Contaminant—typically undesirable minor constituent that renders another substance impure. <br /> Corrosiveness Characteristic— exhibiting the hazardous characteristic <br /> or failing under the test conditions defined in 40 CFR 261.22 °f corrosivity due to extreme pH <br /> Cost—refers to the initial capital cost to design, purchase, and install the remediation option as well as <br /> the cost of operating and maintaining the option. <br /> Data Ouality Objective (DOO) — a planned quantitative measure of precision, accuracy, and <br /> completeness of data. <br /> Density, Apparent (of solids and liquids) —the mass of a unit volume of a material at a specked <br /> temperature. Only the volume that is impermeable is considered. <br /> Density, Bulk (of solids) —the mass of a unit volume of the material at a specified temperature. <br /> Destruction-removal Efficiency (DRE)—The combined efficiencies of one or more processes intended <br /> to reduce the target contaminant(s). The DRE may be expressed as a ratio or percentage. <br /> Dewatering —reducing the water content of a slurry. <br /> Diffusion— movement of molecules towards an equilibrium driven by heat or concentration gradients <br /> mass transfer without bulk fluid flow). <br /> Diffusivity—diffusion coefficient, the weight of material, in grams, diffusing across an area of 1 square <br /> centimeter in 1 second due to a unit concentration gradient. <br /> Dimensional Stability—the ability of the S S waste e to retain its shape, <br /> Direct Capital Costs—include costs for remedial action construction, component equipment, land and <br /> site development, buildings and services, relocation of affected populations, and disposal of waste <br /> materials. <br /> Disposal Facility—a facility or part of a facility at which waste Is intentionally placed into or on any land <br /> or water, and at which waste will remain after closure. <br /> Durability—the ability of S/S wastes to resist physical wear and chemical attack over time. <br /> Dynamic Leach Test (DLT) —a leaching test where the specimen is exposed to an actual or simulated <br /> flow of the leachant. <br /> Economic Evaluation/Cost Analysis (EE/CA) —CERCLA technology screening process for a removal <br /> action per 40 CFR 300.415. <br /> Electrokinetics—removes metals and other contaminants from soil and groundwater by applying an <br /> electric field in the subsurface. <br /> Electrowinning — recovery of elemental metal from water solution by application of electrical potential- <br /> K-4 <br />