§ 60.44a
Standard for nitrogen oxides.
(a) On and after the date on which the initial performance test required to be conducted under § 60.8 is completed, no owner or operator subject to the provisions of this subpart shall cause to be discharged into the atmosphere from any affected facility, except as provided under paragraphs (b) and (d) of this section, any gases which contain nitrogen oxides (expressed as NO2) in excess of the following emission limits, based on a 30-day rolling average, except as provided under § 60.46a(j)(1):
(1) NO
x
emission limits.
Fuel type
Emission limit for heat input
ng/J
(lb/million Btu)
Gaseous fuels:
Coal-derived fuels
210
0.50
All other fuels
86
0.20
Liquid fuels:
Coal-derived fuels
210
0.50
Shale oil
210
0.50
All other fuels
130
0.30
Solid fuels:
Coal-derived fuels
210
0.50
Any fuel containing more than 25%, by weight, coal refuse
(1 )
(1 )
Any fuel containing more than 25%, by weight, lignite if the lignite is mined in North Dakota, South Dakota, or Montana, and is combusted in a slag tap furnace2
340
0.80
Any fuel containing more than 25%, by weight, lignite not subject to the 340 ng/J heat input emission limit2.
Subbituminous coal
210
0.50
Bituminous coal
260
0.60
Anthracite coal
260
0.60
All other fuels
260
0.60
1 Exempt from NOX standards and NOX monitoring requirements.
2 Any fuel containing less than 25%, by weight, lignite is not prorated but its percentage is added to the percentage of the predominant fuel.
(2) NO
x
reduction requirement.
Fuel type
Percent reduction of potential combustion concentration
Gaseous fuels
25
Liquid fuels
30
Solid fuels
65
(b) The emission limitations under paragraph (a) of this section do not apply to any affected facility which is combusting coal-derived liquid fuel and is operating under a commercial demonstration permit issued by the Administrator in accordance with the provisions of § 60.45a.
(c) Except as provided under paragraph (d) of this section, when two or more fuels are combusted simultaneously, the applicable standard is determined by proration using the following formula:
En=[86 w+130×+210 y+260 z+340 v]/100
where:
En is the applicable standard for nitrogen oxides when multiple fuels are combusted simultaneously (ng/J heat input);
w is the percentage of total heat input derived from the combustion of fuels subject to the 86 ng/J heat input standard;
x is the percentage of total heat input derived from the combustion of fuels subject to the 130 ng/J heat input standard;
y is the percentage of total heat input derived from the combustion of fuels subject to the 210 ng/J heat input standard;
z is the percentage of total heat input derived from the combustion of fuels subject to the 260 ng/J heat input standard; and
v is the percentage of total heat input delivered from the combustion of fuels subject to the 340 ng/J heat input standard.
(d)(1) On and after the date on which the initial performance test required to be conducted under § 60.8 is completed, no new source owner or operator subject to the provisions of this subpart shall cause to be discharged into the atmosphere from any affected facility for which construction commenced after July 9, 1997 any gases which contain nitrogen oxides (expressed as NO2) in excess of 200 nanograms per joule (1.6 pounds per megawatt-hour) gross energy output, based on a 30-day rolling average, except as provided under § 60.46a(k)(1).
(2) On and after the date on which the initial performance test required to be conducted under § 60.8 is completed, no existing source owner or operator subject to the provisions of this subpart shall cause to be discharged into the atmosphere from any affected facility for which reconstruction commenced after July 9, 1997 any gases which contain nitrogen oxides (expressed as NO2) in excess of 65 ng/Jl (0.15 pounds per million Btu) heat input, based on a 30-day rolling average.
[44 FR 33613, June 11, 1979, as amended at 54 FR 6664, Feb. 14, 1989; 63 FR 49453, Sept. 16, 1998; 66 FR 18551, Apr. 10, 2001; 66 FR 42610, Aug. 14, 2001]