Maine Revised Statutes
Chapter 4: PROTECTION AND IMPROVEMENT OF AIR
38 §584-C. Establishment of ambient increments -- Class II regions

§584-C. Establishment of ambient increments -- Class II regions
In addition to the ambient air quality standards set forth in section 584‑A, any Class II region or part thereof within the State is subject to a maximum allowable increase in concentration of particulate matter, sulfur dioxide and nitrogen oxides over the baseline concentration of that pollutant. An increase shall not be exceeded more than once annually for any period other than an annual period. The maximum allowable increase consists of:   [PL 1989, c. 860, §3 (AMD).]
1.  PM10.  In regards to PM10:  
A. An increase in the annual arithmetic mean at any location not to exceed 17 micrograms per cubic meter; and   [PL 1995, c. 493, §13 (AMD).]
B. An increase in concentration for any 24-hour period at any location not to exceed 30 micrograms per cubic meter;   [PL 1995, c. 493, §13 (AMD).]
[PL 1995, c. 493, §13 (AMD).]
2.  Sulfur dioxide.  In regards to sulfur dioxide:  
A. An increase in the annual arithmetic mean at any location not to exceed 20 micrograms per cubic meter;   [PL 1979, c. 381, §7 (NEW).]
B. An increase in concentration for any 24-hour period at any location not to exceed 91 micrograms per cubic meter; and   [PL 1979, c. 381, §7 (NEW).]
C. An increase in concentration for any 3-hour period at any location not to exceed 512 micrograms per cubic meter; and   [RR 1993, c. 1, §128 (COR).]
[RR 1993, c. 1, §128 (COR).]
3.  Nitrogen oxides.  In regards to nitrogen oxides:  
A. An increase in the annual arithmetic mean at any location not to exceed 25.0 micrograms per cubic meter to be expressed as nitrogen dioxide.   [PL 1989, c. 860, §4 (NEW).]
[PL 1989, c. 860, §4 (NEW).]
SECTION HISTORY
PL 1979, c. 381, §7 (NEW). PL 1989, c. 860, §§3,4 (AMD). RR 1993, c. 1, §§127,128 (COR). PL 1995, c. 493, §13 (AMD).

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