[Code of Federal Regulations]
[Title 49, Volume 4]
[Revised as of October 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR227.105]

[Page 390]
 
                        TITLE 49--TRANSPORTATION
 
       CHAPTER II--FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF 
                             TRANSPORTATION
 
PART 227_OCCUPATIONAL NOISE EXPOSURE--Table of Contents
 
 Subpart B_Occupational Noise Exposure for Railroad Operating Employees.
 
Sec.  227.105  Protection of employees.

    (a) A railroad shall provide appropriate protection for its 
employees who are exposed to noise, as measured according to Sec.  
227.103, that exceeds the limits specified in appendix A of this part.
    (b) In assessing whether exposures exceed 115 dB(A), as set forth in 
paragraph (a) of this section and appendix A to this part, the apparent 
source of the noise exposures shall be observed and documented and 
measurement artifacts may be removed.
    (c) Except as set forth in paragraph (d) of this section, exposure 
to continuous noise shall not exceed 115dB(A).
    (d) Exposures to continuous noise greater than 115 dB(A) and equal 
to or less than 120 dB(A) are permissible, provided that the total daily 
duration does not exceed 5 seconds.