49 CFR Appendix A to Part 210 - Summary of Noise Standards, 40 CFR Part 201

Paragraph and section	Noise source	Noise standard—A weighted sound level in dB	Noise measure 1	Measurement location
	All Locomotives Manufactured on or Before 31 December 1979
201.11(a)	Stationary, Idle Throttle Setting	73	Lmax (slow)	30 m (100 ft)
201.11(a)	Stationary, All Other Throttle Settings	93	......do	Do.
201.12(a)	Moving	96	Lmax (fast)	Do.
	All Locomotives Manufactured After 31 December 1979
201.11(b)	Stationary, Idle Throttle Setting	70	Lmax (slow)	Do.
201.11(b)	Stationary, All Other Throttle Settings	87	......do	Do.
201.12(b)	Moving	90	Lmax (fast)	Do.
201.11(c) and 201.12(c)	Additional Requirement for Switcher Locomotives Manufactured on or Before 31 December 1979 Operating in Yards Where Stationary Switcher and other Locomotive Noise Exceeds the Receiving Property Limit of	65	L90 (fast) 2	Receiving property
201.11(c)	Stationary, Idle Throttle Setting	70	Lmax (slow)	30 m (100 ft)
201.11(c)	Stationary, All Other Throttle Settings	87	......do	Do.
201.12(c)	Moving	90	Lmax (fast)	Do.
	Rail Cars
201.13(1)	Moving at Speeds of 45 mph or Less	88	......do	Do.
201.13(2)	Moving at Speeds Greater than 45 mph	93	......do	Do.
	Other Yard Equipment and Facilities
201.14	Retarders	83	Ladjavemax (fast)	Receiving property
201.15	Car-Coupling Operations	92	......do	Do.
201.16	Locomotive Load Cell Test Stands, Where the Noise from Locomotive Load Cell Operations Exceeds the Receiving Property Limits of	65	L90 (fast) 2	Do.
201.16(a)	Primary Standard	78	Lmax (slow)	30 m (100 ft).
201.16(b)	Secondary Standard if 30-m Measurement Not Feasible	65	L90 (fast)	Receiving property located more than 120 m from Load Cell.

1 Lmax = Maximum sound level; L90 = Statistical sound level exceeded 90% of the time; Ladjavemax = Adjusted average maximum sound level.

2 L90 must be validated by determining that L10-L99 is less than or equal to 4dB (A).

[48 FR 56758, Dec. 23, 1983; 49 FR 1521, Jan. 12, 1984]