Oklahoma Gas & Electric Muskogee Generating Station Best ...

Oklahoma Gas & Electric
Muskogee Generating Station – BART Determination
May 28, 2008
during periods of high capacity utilization. Therefore, baseline emissions (lb/hr) represent the
highest 24-hour block emissions reported during the baseline period. Baseline emission rates
(lb/mmBtu) were calculated by dividing the maximum hourly mass emission rate by the full load
heat input to the boiler.
Table 2-1
Plant Operating Parameters for BART Evaluation
Parameter Muskogee Unit 4 Muskogee Unit 5
Plant Configuration Pulverized Coal-Fired Boiler Pulverized Coal-Fired Boiler
Firing Configuration tangentially-fired tangentially-fired
Plant Output 572 MW (gross) 572 MW (gross)
Maximum Input to Boiler 5,480 mmBtu/hr 5,480 mmBtu/hr
Primary Fuel subbituminous coal subbituminous coal
Existing NOx Controls combustion controls combustion controls
Existing SO2 Controls low-sulfur coal low-sulfur coal
Existing PM10 Controls
Baseline Emissions
electrostatic precipitator electrostatic precipitator
Pollutant
Baseline Actual Emissions Baseline Actual Emissions
lb/hr lb/mmBtu lb/hr lb/mmBtu
NOx 2,710 0.495 2,863 0.522
SO2 4,384 0.800 4,657 0.850
PM10 101 0.018 134 0.024
2.1 Presumptive BART Emission Rates
In the final Regional Haze Rule EPA established presumptive BART emission limits for SO2 and
NOx for certain electric generating units (EGUs) based on fuel type, unit size, cost effectiveness,
and the presence or absence of pre-existing controls. 1 The presumptive limits apply to EGUs at
power plants with a total generating capacity in excess of 750 MW. For these sources, EPA
established presumptive emission limits for coal-fired EGUs greater than 200 MW in size. The
presumptive levels are intended to reflect highly cost-effective technologies as well as provide
enough flexibility to states to consider source specific characteristics when evaluating BART.
The BART SO2 presumptive emission limit for coal-fired EGUs greater than 200 MW in size
without existing SO2 control is either 95% SO2 removal, or an emission rate of 0.15 lb/mmBtu,
unless a state determines that an alternative control level is justified based on a careful
consideration of the statutory factors. For NOx, EPA established a set of BART presumptive
1 See, 40 CFR 51 Appendix Y Part IV, and 70 FR 39131.
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