This unit covers the nature of various laboratory hazards and the precautions and safety procedures technicians must practice to protect themselves while working in the laboratory environment. Specifically, this unit looks at the hazards presented by chemicals, equipment, and microorganisms. Protective clothing and equipment as well as safe work procedures for preventing exposure and contamination are described. Practical information on detecting and treating chemical exposures and properly dealing with emergencies is also given. Housekeeping responsibilities and personal hygiene are presented as ways of promoting personal safety.