{"data":{"id":"us/40-cfr-table-24-to-subpart-g-of-part-63","jurisdiction":"us","citation":"40 CFR Table 24 to Subpart G of Part 63","heading":"Table 24 to Subpart G of Part 63—Typical Number of Columns as a Function of Tank Diameter for Internal Floating Roof Tanks With Column Supported Fixed Roofs a","body":"Tank diameter range (D in feet) Typical number of columns, (NC)\n0 \u003cD ≤85 1\n85 \u003cD ≤100 6\n100 \u003cD ≤120 7\n120 \u003cD ≤135 8\n135 \u003cD ≤150 9\n150 \u003cD ≤170 16\n170 \u003cD ≤190 19\n190 \u003cD ≤220 22\n220 \u003cD ≤235 31\n235 \u003cD ≤270 37\n270 \u003cD ≤275 43\n275 \u003cD ≤290 49\n290 \u003cD ≤330 61\n330 \u003cD ≤360 71\n360 \u003cD ≤400 81\na Data in this table should not supersede information on actual tanks.","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":"775a6254c30f5ed38006ba8f41be10ea430af070ced9736692929c896c68c5a8","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-table-23-to-subpart-g-of-part-63","next":"us/40-cfr-table-25-to-subpart-g-of-part-63"},"notice":"GroundRules: Original legal text. Not legal advice."}