...contribute to air pollution which may reasonably be anticipated to endanger public health or welfare; (B) the presence of which in the ambient air results...numerous or diverse mobile or stationary sources;... The Act further specifies that (2) ...Air quality criteria for an air pollutant shall accurately reflect...

...the issuance of national ambient air quality standards. First, the Administrator must list pollutants the presence of which in the ambient air results from..."numerous or diverse mobile or stationary sources," "which may reasonably be anticipated to endanger public health or welfare." Next, an air quality criteria...

...contribute to air pollution which may reasonably anticipated to endanger public health or welfare; » * (B) the presence of which in the ambient air results from numerous or diverse mobile or statutory sources; and. (0) (or which air quality eritegia had net boon ioouod before Dooombor 31;...

...contribute to air pollution which may reasonably anticipated to endanger public health or welfare; • * (B) the presence of which in the ambient air results from numerous or diverse mobile or statutory sources; and. f&) — for which air quality efitogia hod net boon — ioouod before — Dooonvbor...

...contribute to air pollution which may reasonably anticipated to endanger public health or welfare; * (B) the presence of which in the ambient air results from numerous or diverse mobile or statutory sources; and. (C) for which aip quality criteria had net in ioouod boforo Dooombor 31 , 1970...

...the issuance of national ambient air quality standards. First, the Administrator must list pollutants the presence of which in the ambient air results from "numerous or aiverse mobile or stationary sources," "which may reasonably be anticipated to endanger public health...

...which may reasonably be anticipated to endanger public health or welfare; i/ Id. 36-594 0-84-42 - 4 (B) the presence of which in the ambient air results...numerous or diverse mobile or stationary sources; and (C) for which he plans to issue air quality criteria under this section. 42 USC I 7408(a)(l). Once...

...contribute to air pollution which may reasonably be anticipated to endanger public health or welfare; (B) the presence of which in the ambient air results...numerous or diverse mobile or stationary sources; and 1970, but for which he plans to issue air quality criteria under this section. (2) The Administrator...

...contribute to air pollution which may reasonably be anticipated to endanger public health or welfare; (B) the presence of which in the ambient air results...numerous or diverse mobile or stationary sources; and (C) for which air quality criteria had not been issued before the date of enactment of the Clean...

...contribute to air pollution that may reasonably be anticipated to endanger public health or welfare . . . the presence of which in the ambient air results from...numerous or diverse mobile or stationary sources." Under section 109, the EPA identifies pollutants that meet this definition and prescribes national...