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 | ||