Air Contaminant | Standards (Maximum Permissible Concentrations) |
Sulfur oxides (sulfur dioxide) | 0.030 parts per million (80 micrograms per cubic meter of air) maximum annual arithmetic mean concentration, not to be exceeded in a calendar year. |
0.14 parts per million (365 micrograms per cubic meter of air) maximum 24-hour concentration, not to be exceeded more than once per calendar year. |
The standards in Table 2 will remain in effect until one year after the effective date of the designation for the one-hour sulfur dioxide standard pursuant to Section 107 of the Federal Clean Air Act except for areas designated nonattainment with respect to the standards in Table 2 and areas not meeting the requirements of a state implementation call with respect to requirements for the national ambient air quality standards in Table 2. The standards in Table 2 will apply to those areas until that area submits, and the environmental protection agency approves, an implementation plan providing for attainment of the one-hour sulfur dioxide standard.
N.D. Admin Code tit. 33.1, art. 33.1-15, ch. 33.1-15-02, tbl. 2