15A NCAC 02D .0403 TOTAL SUSPENDED PARTICULATES
(a) The ambient air quality standards for total suspended particulate matter are:
(1) (2)
75 micrograms per cubic meter annual geometric mean, 150 micrograms per cubic meter maximum 24-hour concentration not to be exceeded more than once per year.
(b) Sampling and analysis shall be in accordance with procedures in Appendix B of 40 C.F.R Part 50 or equivalent methods established under 40 CFR Part 53.
History Note:
Authority G.S. 143-215.3(a)(1); 143-215.107(a)(3); Eff. February 1, 1976; Amended Eff. July 1, 1988; July 1, 1984; October 15, 1981.
