دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

abbr: lowest achievable emission rate.

n: (LAER) an air emission standard determined by the states on a case-by-case basis. LAER is applied in nonattainment areas, which do not meet NAAQS, and is more stringent than the BACT applied in attainment areas. Consequently, cost and economic impact are not taken into consideration in determining LAER.

n pl: areas in the United States that fail to meet NAAQS and that are subject to tighter emission controls and more complicated requirements than are attainment areas. Major new or modified air pollution sources in nonattainment areas must get a permit to build, offset the new emission increase by obtaining reducions from existing sources, and must meet the lowest achievable emission rate.