{"data":{"id":"us/40-cfr-appendix-c-to-part-72","jurisdiction":"us","citation":"40 CFR Appendix C to Part 72","heading":"Appendix C to Part 72—Actual 1985 Yearly SO2 Emissions Calculation","body":"The equation used to calculate the yearly SO2 emissions (SO2) is as follows:\nSO2 = (coal SO2 emissions) + (oil SO2 emissions) (in tons)\nIf gas is the only fuel, gas emissions are defaulted to 0.\nEach fuel type SO2 emissions is calculated on a yearly basis, using the equation:\nfuel SO2 emissions (in tons) = (yrly wtd. av. fuel sulfur %) × (AP-42 fact.) × (1−scrb. effic. %/100) × (units conver. fact.) × (yearly fuel burned)\nFor 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 SO2 ton coal, is by coal type:\nCoal type AP-42 factor\nBituminous, anthracite 39 lbs/ton\nSubbituminous 35\nLignite 30\nFor 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 SO2/thousand gal oil, is by oil type:\nOil type AP-42 factor\nDistillate (light) 142 lbs/1,000 gal\nResidual (heavy) 157\nFor all fuel, the units conversion factor is 1 ton/2000 lbs.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 72—PERMITS REGULATION"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"1f5ce19de9a0f4c629c34b6f158c10b63bf12a9fb9eb99506263148003e5c0c5","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-appendix-b-to-part-72","next":"us/40-cfr-appendix-d-to-part-72"},"notice":"GroundRules: Original legal text. Not legal advice."}