Exposure Assessment

If initial monitoring shows that employee exposure is below the action level, the employer can discontinue monitoring these employees. Where monitoring indicates that exposure is at or above the action level but below the PEL, the employer is required to repeat the scheduled monitoring within six months of the most recent monitoring.

In addition, where monitoring indicates that exposure is at or above the PEL, employers must repeat the monitoring within three months of the most recent monitoring.

Employers must reassess employees whenever there is a change in the workplace that may cause additional exposures at or above the action level, as follows:

• Production
• Process
• Control equipment
• Work practices

Employees must be notified of monitoring results within 15 working days, five working days for the construction industry, of completing the exposure assessment.

To learn more about Silica Safety visit our General & Maritime Silica Safety Online Training web page.