# 40 CFR Part 72, Appendix C to Part 72 - Actual 1985 Yearly SO2 Emissions Calculation

Appendix C to Part 72—Actual 1985 Yearly SO

*2*Emissions CalculationThe equation used to calculate the yearly SO

*2*emissions (SO2) is as follows:SO2 = (coal SO

*2*emissions) (oil SO*2*emissions) (in tons)If gas is the only fuel, gas emissions are defaulted to 0.

Each fuel type SO

*2*emissions is calculated on a yearly basis, using the equation:fuel SO

*2*emissions (in tons) = (yrly wtd. av. fuel sulfur %) × (AP-42 fact.) × (1−scrb. effic. %/100) × (units conver. fact.) × (yearly fuel burned)For coal, the yearly fuel burned is in tons/yr and the AP-42 factor (which accounts for the ash retention of sulfur in coal), in lbs SO

*2*ton coal, is by coal type:Coal type | AP-42 factor |
---|---|

Bituminous, anthracite | 39 lbs/ton |

Subbituminous | 35 |

Lignite | 30 |

For oil, the yearly fuel burned is in gal/yr. If it is in bbl/yr, convert using 42 gal/bbl oil. The AP-42 factor (which accounts for the oil density), in lbs SO

*2*/thousand gal oil, is by oil type:Oil type | AP-42 factor |
---|---|

Distillate (light) | 142 lbs/1,000 gal |

Residual (heavy) | 157 |

For all fuel, the units conversion factor is 1 ton/2000 lbs.

**Title 40 published on 2013-07-01**

no entries appear in the Federal Register **after** this date.