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Regulations last checked for updates: Mar 14, 2025
Title 40 - Protection of Environment last revised: Nov 14, 2025
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Title 40
Chapter I
Part 63
Subpart QQQ
Appendix - Figure 1 to Subpart QQQ of Part 63—Data Summary Sheet for Determination of Average Opacity
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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.
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