Federal regulations · Through 2026-08-25 · Newer source version available

40 CFR Table 24 to Subpart G of Part 63: 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

Where this section sits in the code

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

Tank diameter range (D in feet) Typical number of columns, (NC)

0 <D ≤85 1

85 <D ≤100 6

100 <D ≤120 7

120 <D ≤135 8

135 <D ≤150 9

150 <D ≤170 16

170 <D ≤190 19

190 <D ≤220 22

220 <D ≤235 31

235 <D ≤270 37

270 <D ≤275 43

275 <D ≤290 49

290 <D ≤330 61

330 <D ≤360 71

360 <D ≤400 81

a Data in this table should not supersede information on actual tanks.

Collected 2026-08-27T02:26:04Z. Source file · JSON