دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: (PSD) a provision under the CAA that prevents deterioration of air quality in areas where the air is already better than NAAQS. Under PSD, major new emission sources must demonstrate that they will not degrade air quality any more than the NAAQS allow in that particular area. Ma- jor air emitters in attainment areas must obtain PSD permits and install the best- available control technology.