OHS Code

Published Date: July 01, 2009
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Part 16 Noise Exposure

Section 219 Noise exposure assessment

(1) If workers are, or may be, exposed to noise at a work site in excess of 85 dBA Lex and the noise exposure limits in Schedule 3, Table 1, an employer must do a noise exposure assessment under section 7.

(2) A person who assesses noise exposure at a work site must measure the noise in accordance with CSA Standard Z107.56-06, Procedures for the Measurement of Occupational Noise Exposure.

(3) A person who measures noise exposure at a work site must use

(a) a sound level meter meeting the requirements for a Type 2 instrument as specified by ANSI Standard S1.4-1983 (R2006), Specification for Sound Level Meters,

(b) a noise dosimeter meeting the requirements for a Type 2 instrument as specified by ANSI Standard S1.25-1991 (R1997), Specification for Personal Noise Dosimeters, and set at

(i) a criterion level of 85 dBA with a 3 dB exchange rate,

(ii) a threshold level at or below 80 dBA or “off”, and

(iii) slow response,

(c) an integrating sound level meter meeting the requirements as specified by ANSI Standard S1.43-1997, Specifications for Integrating-Averaging Sound Level Meters, or IEC Standard 61672-1 (2002), Electroacoustics – Sound Level Meters – Part 1: Specifications and IEC Standard 61672-2 (2003), Electroacoustics – Sound Level Meters – Part 2: Pattern evaluation tests, or

(d) equipment approved by a Director of Occupational Hygiene.

(4) An employer must ensure that a noise exposure assessment is

(a) conducted and interpreted by a competent person, and

(b) updated if a change in equipment or process affects the noise level or the length of time a worker is exposed to noise.