Monitoring is to be conducted on employees exposure to chemical hazardous to health listed in Schedule II of the USECHH Regulation 2000 and where CHRA recommend monitoring to be conducted in accordance with an approved method of sampling and analysis for the chemical hazardous to health. Workplace exposure monitoring also may be required for other reason such as:
To ensure the employees exposure level are maintained below the Permissible Exposure Limits
To ensure the maintenance of adequate control measure
To quantify exposure during new process set-up
To assess the effects of a change in process specification
To ensure that the risk assessment is still valid.