{"data":{"id":"us/40-cfr-table-25-to-subpart-g-of-part-63","jurisdiction":"us","citation":"40 CFR Table 25 to Subpart G of Part 63","heading":"Table 25 to Subpart G of Part 63—Effective Column Diameter (Fc)","body":"Column type Fc (feet)\n9-inch by 7-inch built-up columns 1.1\n8-inch-diameter pipe columns 0.7\nNo construction details known 1.0","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 63—NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES","Subpart G—National Emission Standards for Hazardous Air Pollutants From the Synthetic Organic Chemical Manufacturing Industry for Process Vents, Storage Vessels, Transfer Operations, and Wastewater"],"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":"2003deb7447b53810ebd02986d9b71053894500d954ded2c0799bc278d934efa","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-table-24-to-subpart-g-of-part-63","next":"us/40-cfr-table-26-to-subpart-g-of-part-63"},"notice":"GroundRules: Original legal text. Not legal advice."}