Code of Federal Regulations > Title 40 > Chapter I > Part 1037 > Subpart I > Appendix Appendix E -

Regulations last checked for updates: Nov 23, 2025

Title 40 - Protection of Environment last revised: Nov 23, 2025

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Appendix Appendix E -

Time (min)	Utility factor fraction
0	0
10	0.1
20	0.18
30	0.24
40	0.31
50	0.36
60	0.4
70	0.44
80	0.47
90	0.51
100	0.54
110	0.57
120	0.6
130	0.64
140	0.66
150	0.69
160	0.71
170	0.74
180	0.76
190	0.77
200	0.79
210	0.8
220	0.82
230	0.83
240	0.85
250	0.86
260	0.87
270	0.88
280	0.88
290	0.89
300	0.9
310	0.9
320	0.91
330	0.92
340	0.93
350	0.93
360	0.94
370	0.95
380	0.95
390	0.96
420	0.96
430	0.97
460	0.97
470	0.98
520	0.98
530	0.99
580	0.99
590	1

[81 FR 74048, Oct. 25, 2016. Redesignated at 88 FR 4658, Jan. 24, 2023]

authority: 42 U.S.C. 7401—7671q

source: 81 FR 74048, Oct. 25, 2016, unless otherwise noted.

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