Ariz. Admin. Code § R18-2-202 - Sulfur Oxides (sulfur Dioxide)
A. The primary ambient air quality standards
for sulfur oxides, measured as sulfur dioxide, are:
1. 0.03 parts per million (ppm) (80
µg/m3) -- annual arithmetic mean.
2. 0.14 parts per million (ppm) (365
µg/m3) - maximum 24-hour concentration not to be exceeded more than once
per calendar year.
3. 75 parts per
billion (ppb) - maximum one-hour concentration. The one-hour primary standard
is met at an ambient air quality monitoring site when the three-year average of
the annual 99th percentile of the daily maximum one-hour average concentrations
is less than or equal to 75 parts per billion, as determined according to 40
CFR 50, Appendix T.
B.
The secondary ambient air quality standard for sulfur oxides, measured as
sulfur dioxide, is 0.5 parts per million (ppm) (1300 µg/m3) -- maximum
three-hour concentration not to be exceeded more than once per year.
C. The level of the standards shall be
measured by a reference method based on 40 CFR 50, Appendix A or A-1, or by a
Federal Equivalent Method designated according to 40 CFR 53.
D. The standards in subsections (A)(1) and
(2) shall apply:
1. In an area designated
nonattainment for a standard in subsection (A)(1) or (2) as of August 23, 2011,
and areas not meeting a state implementation plan call for a standard in
subsection (A)(1) or (2), until the state submits pursuant to section 191 of
the Act, and the Administrator approves, a state implementation plan providing
for attainment the standard in subsection (A)(3) in that area.
2. In areas other than those identified in
subsection (D)(1), until the effective date of the designation of that area,
pursuant to section 107 of the act, for the standard in subsection
(A)(3).
Notes
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