Exemption:

• Periodic exposure evaluations aren't required if exposure monitoring results conducted to fulfill requirements in Exposure evaluation, WAC 296-848-20060, are below the action level (AL).

You must obtain employee exposure monitoring results as specified in Table 2 by repeating Steps 2, 4, and 5 of the Exposure Evaluation Process found within this chapter, in Exposure evaluations, WAC 296-848-20060.

Note:

If you document that one work shift consistently has higher exposure monitoring results than another for a particular operation, then you limit sample collection to the work shift with higher exposures and can use results to represent all employees performing the operation on other shifts.

Table 2

Periodic Exposure Evaluation Frequencies

If 8-hour employee exposure monitoring results:	Then:
Are between the: – Action level (AL) of 5 micrograms per cubic meter (µg/m3); AND – Permissible exposure limit (PEL) of 10 µg/m3	Conduct additional exposure evaluations at least every six months for the employees represented by the monitoring results.
Are above the PEL	Conduct additional exposure evaluations at least every three months for the employees represented by the monitoring results.
For employees previously above the PEL, have decreased: – To a concentration between the PEL and AL; AND – The decrease is demonstrated by two consecutive exposure evaluations made at least seven days apart	You may decrease your evaluation frequency to every six months for the employees represented by the monitoring results.
Have decreased to below the AL; AND The decrease is demonstrated by two consecutive exposure evaluations made at least seven days apart	You may stop periodic employee exposure evaluations for employees represented by the monitoring results.

PDFWAC 296-848-30010

Periodic exposure evaluations.