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PDFWAC 296-307-630

Scope.

The purpose of this part is to:
• Prevent employee hearing loss by minimizing employee noise exposures
and
• Make sure employees exposed to noise are protected.
These goals are accomplished by:
• Measuring and computing the employee noise exposure from all equipment and machinery in the workplace, as well as any other noise sources in the work area
• Protecting employees from noise exposure by using feasible noise controls
• Making sure employees use hearing protection, if you cannot feasibly control the noise
• Training employees about hearing loss prevention
• Evaluating your hearing loss prevention efforts by tracking employee hearing or periodically reviewing controls and protection
• Making appropriate corrections to your program.
Reference:
Table 1 will help you determine the hearing loss prevention requirements for your workplace. For the specific requirements associated with Noise Evaluation Criteria, see WAC 296-307-63410 of this part.
Table 1
Noise Evaluation Criteria
Criteria
Description
Requirements
85 dBA TWA8
Full-day employee noise exposure dose. If you have one or more employees whose exposure equals or exceeds this level, you must have a hearing loss prevention program
– Hearing protection
– Training
– Audiometric testing
90 dBA TWA8
Full-day employee noise exposure dose. If you have one or more employees whose exposure equals or exceeds this level, you must reduce employee noise exposures in the workplace
– Noise controls
and
– Hearing protection
– Training
– Audiometric testing
115 dBA measured using slow response
Extreme noise level (greater than one second in duration)
– Hearing protection
– Signs posted in work areas warning of exposure
140 dBC measured using fast response
Extreme impulse or impact noise (less than one second in duration)
Hearing protection
[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060. WSR 05-01-166, § 296-307-630, filed 12/21/04, effective 4/2/05.]
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