ABSTRACT
This chapter discusses Globally Harmonized System classification of hazardous substances, and the requirements of control of substances hazardous to health regulations. It presents different survey techniques for health risks. An occupational exposure limit (OEL) or workplace exposure limits must not be exceeded. OELs are normally established by competent national authorities and enforced by appropriate legislation. There are two time-weighted averages: the long-term exposure limit and the short-term exposure limit. The chapter discusses principles of good practice for the control of exposure to substances hazardous to health, hierarchy of control measures, and preventative control measures. Personal protective equipment is the control measure of last resort. Asbestos is a possible chronic health risk. If asbestos is discovered during the performance of a contract, work should cease immediately and the employer should be informed. Wood dust can be hazardous, particularly from hard woods and composite boards.
