SAN DIEGO COUNTY AIR POLLUTION CONTROL DISTRICT
RULE 260.44a - STANDARD FOR NITROGEN OXIDES
(a) On and after the date on which the initial performance test required to be conducted under Rule 260.8 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 Section (b) of this rule, any gases which contain nitrogen
oxides in excess of the following emission limits, based on a 30-day rolling average.
|
Emission Limit Fuel TypeHeat Input |
||
| Gaseous fuels: | |||
| Coal-derived fuels All other fuels |
210 86 |
(0.50) (0.20) |
|
| Liquid fuels: | |||
|
Coal-derived fuels Shale oil All other fuels |
210 210 130 |
(0.50) (0.50) (0.30) |
|
| Solid fuels: | |||
| Coal-derived fuels Any fuel containing more than 25% by weight, coal refuse |
210 | (0.50) | |
|
Exempt from NOx standards and NO2 monitoring requirements |
|||
| Any fuel containing more than 25%, by eight, lignite if the lignite is mined in North Dakota, South Dakota, or Montana, and is combusted in a slag tap furnace. | 340 | (0.80) | |
| Lignite not subject to the 340 ng/J heat input emission limit | 260 | (0.60) | |
| Subbituminous coal | 210 | (0.50) | |
| Bituminous coal | 260 | (0.60) | |
| Anthracite coal | 260 | (0.60) | |
|
Percent reduction of Fuel Typeconcentration |
||
| Gaseous fuels |
25% |
||
| Liquid fuels |
30% |
||
| Solid fuels |
65% |
||
(b) The emission limitations under Section (a) of this rule 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 Rule 260.45a.
(c) When two or more fuels are combusted simultaneously, the applicable standard is determined by proration using the following formula:
where,
ENO2 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 standards;
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; and
z is the percentage of total heat input derived from the combustion of fuels subject to the 260 ng/J heat input standard.