Regulations last checked for updates: May 17, 2024

Title 40 - Protection of Environment last revised: May 15, 2024
Appendix - Table 1 to Subpart LL of Part 63—Potline TF Limits for Emission Averaging
Type Semiannual TF limit (lb/ton) [for given number of potlines]
2 lines 3 lines 4 lines 5 lines 6 lines 7 lines 8 lines
CWPB11.71.61.51.51.41.41.4
CWPB22.92.82.72.72.62.62.6
CWPB32.32.22.22.12.12.12.1
SWPB1.41.31.31.21.21.21.2
VSS22.62.52.52.42.42.42.4
[80 FR 62424, Oct. 15, 2015
authority: 42 U.S.C. 7401
source: 57 FR 61992, Dec. 29, 1992, unless otherwise noted.