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 L max (slow) 30 m (100 ft) 201.11(a) Stationary, All Other Throttle Settings 93 ......do Do. 201.12(a) Moving 96 L max (fast) Do. All Locomotives Manufactured After 31 December 1979 201.11(b) Stationary, Idle Throttle Setting 70 L max (slow) Do. 201.11(b) Stationary, All Other Throttle Settings 87 ......do Do. 201.12(b) Moving 90 L max (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 L 90 (fast) 2 Receiving property 201.11(c) Stationary, Idle Throttle Setting 70 L max (slow) 30 m (100 ft) 201.11(c) Stationary, All Other Throttle Settings 87 ......do Do. 201.12(c) Moving 90 L max (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 L adjavemax (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 L 90 (fast) 2 Do. 201.16(a) Primary Standard 78 L max (slow) 30 m (100 ft). 201.16(b) Secondary Standard if 30-m Measurement Not Feasible 65 L 90 (fast) Receiving property located more than 120 m from Load Cell. 1 L max = Maximum sound level; L 90 = Statistical sound level exceeded 90% of the time; L adjavemax = Adjusted average maximum sound level. 2 L 90 must be validated by determining that L 10 -L 99 is less than or equal to 4dB (A). [48 FR 56758, Dec. 23, 1983; 49 FR 1521, Jan. 12, 1984]