Appendix B - Appendix B to Part 72—Methodology for Conversion of Emissions Limits
For the purposes of the Acid Rain Program, all emissions limits must be expressed in pounds of SO
The factor for converting pounds of sulfur to pounds of SO
Table B-1—Conversion Factors
[Emission limits converted to lbs SO
Unit measurement | Plant fuel type | Bituminous coal | Subbituminous coal | Lignite coal | Oil | Lbs sulfur/ MMBtu | 2.0 | 2.0 | 2.0 | 2.0 | % sulfur in fuel | 1.66 | 2.22 | 2.86 | 1.07 | Ppm SO | 0.00287 | 0.00384 | 0.00167 | Ppm sulfur in fuel | 0.00334 | Tons SO | 2,000,000/(HEATRATE*SUMNDCAP*capacity factor) 1 | Lbs SO | 1,000/(HEATRATE*SUMNDCAP*capacity factor) 1 |
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1 In these cases, if the limit was specified as the “site” limit, the summer net dependable capability for the entire plant is used; otherwise, the summer net dependable capability for the unit is used. For units listed in the NADB, “HEATRATE” shall be that listed in the NADB under that field and “SUMNDCAP” shall be that listed in the NADB under that field. For units not listed in the NADB, “HEATRATE” is the generator net full load heat rate reported on Form EIA-860 and “SUMNDCAP” is the summer net dependable capability of the generator (in MWe) as reported on Form EIA-860.
Table B-2—Assumed Average Energy Contents
Fuel type | Average heat content | Bituminous Coal | 24 MMBtu/ton. | Subbituminous Coal | 18 MMBtu/ton. | Lignite Coal | 14 MMBtu/ton. | Residual Oil | 6.2 MMBtu/bbl. |
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