On Board Trains Occupational Health and Safety Regulations

7.20 (1) No employee shall be exposed to a concentration of

• (a) an airborne chemical agent in excess of the value for that chemical agent adopted by the American Conference of Governmental Industrial Hygienists in its publication entitled Threshold Limit Values and Biological Exposure Indices for 1986-1987; or

• (b) an airborne hazardous substance, other than a chemical agent, that is hazardous to the safety or health of the employee.

(2) Where there is a possibility that an employee may be exposed to a concentration of an airborne chemical agent in excess of the value referred to in paragraph (1)(a), the air shall be sampled by a qualified person and the concentration of the chemical agent determined by a test in accordance with

• (a) the standards set out by the American Conference of Governmental Industrial Hygienists in its publication entitled Manual of Analytical Methods Recommended for Sampling and Analysis of Atmospheric Contaminants, dated 1958;

• (b) the standards set out by the United States National Institute for Occupational Safety and Health in the NIOSH Manual of Analytical Methods, third edition, volumes 1 and 2, dated February, 1984; or

• (c) a method set out in the United States Federal Register, volume 40, number 33, dated February 18, 1975, as amended by volume 41, number 53, dated March 17, 1976.

(3) A record of each test made pursuant to subsection (2) shall be kept by the employer for three years after the date of the test.

(4) A record referred to in subsection (3) shall include

• (a) the date, time and location of the test;

• (b) the chemical agent for which the test was made;

• (c) the sampling and testing method used;

• (d) the result obtained; and

• (e) the name and occupation of the qualified person who made the test.