[Code of Federal Regulations]

[Title 40, Volume 24]

[Revised as of July 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 40CFR201.25]



[Page 79]

 

                   TITLE 40--PROTECTION OF ENVIRONMENT

 

         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)

 

PART 201_NOISE EMISSION STANDARDS FOR TRANSPORTATION EQUIPMENT; INTERSTATE 

RAIL CARRIERS--Table of Contents

 

                     Subpart C_Measurement Criteria

 

Sec.  201.25  Measurement location and weather conditions for measurement 

on receiving property of the noise of retarders, car coupling, locomotive 

load cell test stands, and stationary locomotives.



    (a) Measurements must be conducted only at receiving property 

measurement locations.

    (b) Measurement locations on receiving property must be selected 

such that no substantially vertical plane surface, other than a 

residential or commercial unit wall or facility boundary noise barrier, 

that exceeds 1.2 meters (4 feet) in height is located within 10 meters 

(33.3 feet) of the microphone and that no exterior wall of a residential 

or commercial structure is located within 2.0 meters (6.6 feet) of the 

microphone. If the residential structure is a farm home, measurements 

must be made 2.0 to 10.0 meters (6.6 to 33.3 feet) from any exterior 

wall.

    (c) No measurement may be made when the average wind velocity during 

the period of measurement exceeds 19.3 km/hr (12 mph) or when the 

maximum wind gust velocity exceeds 32.2 km/hr (20 mph).

    (d) No measurement may be taken when precipitation, e.g., rain, 

snow, sleet, or hail, is occurring.