February 14 , 1975IN THE MATTER OFPROPOSED AMBIENT AIRQUALITY STANDARDS FOR ) R72-7SULFUR DIOXIDEORDER OF THE BOARD (by Mr.
The secondary ambient air
quality standard for sulfur oxides measured as sulfurdioxide is a maximum 3—hour concentration not to beexceeded more than once per year of 1,300 microgramsper cubic meter (0.5 ppm).
(c) Measurement Period.
On May 3, 1973 the
Board enacted the air quality standards with the exceptionof Rule 308: Sulfur Oxide which was again proposed for finalcomment.
John Finklea, R.
8 to 85,
Exhibits 1, 2 and 3;Testimony of Gary Patzlaff, R. 114 to 178;Testimony of F. Frazer Ross, R....
Allowed
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