A. In addition to
the ambient air quality standards adopted by the Board and enacted as
38
M.R.S.A.,584-A, any Class I Region or part
thereof within the State (including those federal lands designated by the
Clean Air Act Amendments of 1977 shall be subject to a maximum
allowable increase in concentration of PM2.5,
PM10, sulfur dioxide, and nitrogen dioxide over the
baseline concentration of such pollutants. The maximum allowable increase for
any period other than an annual period, shall not be exceeded more than once
annually. Such maximum allowable increase shall consist of:
(1)
PM
2.5
(a) An
increase in the annual arithmetic mean at any location shall not exceed 1
microgram per cubic meter.
(b) An
increase in concentration for any 24-hour period at any location shall not
exceed 2 micrograms per cubic meter.
(2)
PM10
(a) An increase in the annual arithmetic mean
at any location shall not exceed 4 micrograms per cubic meter.
(b) An increase in concentration for any
24-hour period at any location shall not exceed 8 micrograms per cubic
meter.
(3)
Sulfur
Dioxide
(a) An increase in the annual
arithmetic mean at any location shall not exceed 2 micrograms per cubic
meter.
(b) An increase in
concentration for any 24-hour period at any location shall not exceed 5
micrograms per cubic meter.
(c) An
increase in concentration for any three-hour period at any location shall not
exceed 25 micrograms per cubic meter.
(4)
Nitrogen Dioxide
(a) An increase in the annual arithmetic mean
at any location shall not exceed 2.5 micrograms per cubic meter.
B. In addition to the
ambient air quality standards adopted by the Board and enacted as
38 M.R.S.A.,
584-A, any Class II region or part thereof
within the State shall be subject to a maximum allowable increase in
concentration of PM2.5,PM10,
sulfur dioxide and nitrogen dioxide over the baseline concentration of such
pollutants. The maximum allowable increase for any period other than an annual
period, shall not be exceeded more than once annually. Such maximum allowable
increase shall consist of:
(1)
PM
2.5
(a) An
increase in the annual arithmetic mean at any location shall not exceed 4
micrograms per cubic meter.
(b) An
increase in concentration for any 24-hour period at any location shall not
exceed 9 micrograms per cubic meter.
(2)
PM10
(a) An increase in the annual arithmetic mean
at any location shall not exceed 17 micrograms per cubic meter.
(b) An increase in concentration for any
24-hour period at any location shall not exceed 30 micrograms per cubic
meter.
(3)
Sulfur
dioxide
(a) An increase in the annual
arithmetic mean at any location shall not exceed 20 micrograms per cubic
meter.
(b) An increase in
concentration for any 24-hour period at any location shall not exceed 91
micrograms per cubic meter.
(c) An
increase in concentration for any three-hour period at any location shall not
exceed 512 micrograms per cubic meter.
(4)
Nitrogen Dioxide
(a) An increase in the annual arithmetic mean
at any location shall not exceed 25 micrograms per cubic meter.
C. In addition to the
ambient air quality standards adopted by the Board and enacted as
38 M.R.S.A.,
584-A, any Class III Region or part thereof
within the State shall be subject to a maximum allowable increase in
concentration of PM2.5, PM10,
sulfur dioxide and nitrogen dioxide over the baseline concentration of such
pollutants. The maximum allowable increase for any period other than an annual
period, shall not be exceeded more than once annually. Such maximum allowable
increase shall consist of:
(1)
PM
2.5
(a) An
increase in the annual arithmetic mean at any location shall not exceed 8
micrograms per cubic meter.
(b) An
increase in concentration for any 24-hour period at any location shall not
exceed 18 micrograms per cubic meter.
(2)
PM10
(a) An increase in the annual arithmetic mean
at any location shall not exceed 34 micrograms per cubic meter.
(b) An increase in concentration for any
24-hour period at any location shall not exceed 60 micrograms per cubic
meter.
(3)
Sulfur
dioxide
(a) An increase in the annual
arithmetic mean at any location shall not exceed 40 micrograms per cubic
meter.
(b) An increase in
concentration for any 24-hour period at any location shall not exceed 182
micrograms per cubic meter.
(c) An
increase in concentration for any three-hour period at any location shall not
exceed 700 micrograms per cubic meter.
(4)
Nitrogen Dioxide
(a) An increase in the annual arithmetic mean
at any location shall not exceed 50 micrograms per cubic meter.
