Unless otherwise specified, interpretation of all ambient air quality standards contained in this Article shall be in accordance with 40 CFR 50, incorporated by reference in Appendix 2 of this Chapter.
Ariz. Admin. Code § R18-2-216
Unless otherwise specified, interpretation of all ambient air quality standards contained in this Article shall be in accordance with 40 CFR 50, incorporated by reference in Appendix 2 of this Chapter.
Ariz. Admin. Code § R18-2-216