...are set forth in this part. (b) National primary ambient air quality standards define levels of ah* quality which the Administrator judges are necessary,...promulgation of national primary and secondary ambient ah- quality standards shall not be considered in any manner to allow significant deterioration of existing...

...Pennsylvania: 5.0 wg/m That standard, according to the Environmental Protection Agency, is adequate to protect the public welfare from any known or anticipated adverse effects associated with the presence of oxides of nitrogen in ambient air. Liquid T ILTP The largest quantity...

...and maintenance of which in the judgment of the Administrator, based on such criteria, is requisite to protect the public welfare from any known or anticipated adverse effects associated with the presence of such air pollutant in the ambient air. Such secondary standards may...

...Quality Standards promulgated by the Environmental Protection Agency. These standards have been set to protect the public welfare from any known or anticipated adverse effects of air pollutants in the ambient air. The index is based upon a combination of pollutants and can include...

...those required to protect the public health. Secondary ambient air quality standards are those required to protect the public welfare from any known or anticipated adverse effects. Table 11.4 lists EPA's standards for certain pollutants. Within nine months after promulgation of ambient...

...define levels of air quality which the adminitsrator judges are necessary, with an adequate magrin of safety, to protect the public health. National...known or anticipated adverse effects of a pollutant. . . . The promulgation of national primary and secondary standards shall not be considered in any manner...

...and maintenance of which in the judgment of the Administrator, based on such criteria, is requisite to protect the public welfare from any known or anticipated adverse effects associated with the presence of such air pollutant in the ambient air. Such secondary standards may...

...standards denne levels of air quality which the Administrator judges are necessary, with an adequate mamm of safety, to protect the public health. National...standards are subject to revision, and additional primary nnd secondary standards may be promulgated as the Administrator deems necessary to protect the public...

...secondary ambient air quality standards define levels of air quality which the Administrator judge* necessary to protect the public welfare from any known...additional primary and secondary standards may be promulnated as the Administrator deems necessary to protect the public health and welfare. <c> The...

...the Environmental Protection Agency (EPA). " National secondary standards: The levels of air quality necessary to protect the public welfare from any known or anticipated adverse effects of a pollutant. Each State must attain the secondary standard within a reasonable time after implementation plan is...