Regulations last checked for updates: Nov 22, 2024

Title 40 - Protection of Environment last revised: Nov 20, 2024
Appendix - Figure 1 to Subpart QQQ of Part 63—Data Summary Sheet for Determination of Average Opacity

Figure 1 to Subpart QQQ of Part 63—Data Summary Sheet for Determination of Average Opacity

Clock time Number of converters blowing Converter aisle activity Average opacity for
1-minute interval
(percent)
Visible emissions interference observed during 1-minute interval?
(yes or no)
Average opacity for 1-minute interval blowing without visible emission interferences
(percent)
authority: 42 U.S.C. 7401
source: 57 FR 61992, Dec. 29, 1992, unless otherwise noted.