By C. C. Lee
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Extra resources for Environmental engineering dictionary
81-91). Added risk: The difference between the cancer incidence under the exposure condition and the background incidence in the absence of exposure; AR = P(d) - P(0) (EPA-92/12). Addict: Any person who habitually uses any habit-forming narcotic drugs so as to endanger the public morals, health, safety, or welfare, or who is or has been so far addicted to the use of such habit-forming narcotic drugs as to have lost the power of selfcontrol with reference to his addiction (PHSA2-k). Addition agent: A substance, usually an organic material, added to an electroplating solution to improve the properties of an electroplate (EPA-74103d).
Administrative Procedures Act: The Act that establishes rulemaking procedures as well as site-specific licensing procedures, access to agency information, and procedures and standards for judicial review of agency actions. All environmental rulemakings proposed and finalized by EPA include public participation throughout the process (RCRAhazardous-04). Administrative record (AR): A compilation of information established for all CERCLA sites made available to the public at the start of the Remedial Investigation (RI)for remedial actions, or at the time of Engineering EvaluatiodCost Analysis (EEICA) for removal actions.
Addition agent: A substance, usually an organic material, added to an electroplating solution to improve the properties of an electroplate (EPA-74103d). Additional polymerization: The combination of monomers by the direct addition or combination of the monomer molecules with one another to form polymers (EPA-8711Oa). Additive effect (or additivity): The combined effects of two or more chemicals equal to the sum of their individual effects (cf. 6; EPA-85/09). Additive effect: A biologic response to exposure to multiple substances that equals the sum of responses of all the individual substances added together (compare with antagonistic effect and synergistic effect) (SFhealth-04).