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PDFWAC 296-856-30010

Periodic exposure evaluations.

Exemption:
Periodic employee exposure monitoring is not required if exposure monitoring results conducted to fulfill requirements in this chapter, Exposure evaluations, WAC 296-856-20050, are below both the action level (AL) and 15-minute short-term exposure limit (STEL).
You must obtain employee exposure monitoring results as specified in Table 2 by repeating Steps 1 and 7 of the exposure evaluation process found within this chapter, in Exposure evaluations, WAC 296-856-20050.
Note:
If you document that one work shift consistently has higher exposure monitoring results than another for a particular operation, then you may limit sample collection to the work shift with higher exposures and use those results to represent all employees performing the operation on other shifts.
Table 2
Periodic Exposure Evaluation Frequencies
If employee exposure monitoring results
Then
Are above the action level (AL) of 0.5 ppm
Conduct additional exposure monitoring at least every six months for the employees represented by the monitoring results
Are above the short-term exposure limit (STEL) of 2 ppm
Repeat exposure monitoring at least once a year, or more often as necessary to evaluate employee exposure
Have decreased to below the AL and the STEL
You may stop periodic employee exposure monitoring for employees represented by the monitoring results.
 
AND
 
Note: You need to monitor again if there is a change in any of the following that may result in new or increased employee exposures:
The decrease is demonstrated by two consecutive exposure evaluations made at least seven days apart
Production
Processes
Exposure controls, such as ventilation systems or work practices
Personnel
Equipment
[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060. WSR 18-22-116, § 296-856-30010, filed 11/6/18, effective 12/7/18; WSR 06-08-087, § 296-856-30010, filed 4/4/06, effective 9/1/06.]
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