The Occupational Exposure to Hazardous Chemicals in Laboratories standard (29 CFR § 1910.1450) defines the Chemical Hygiene Plan (CHP) as a written program developed and implemented by the employer which sets forth procedures, equipment, personal protective equipment and work practices that are capable of protecting employees from health effects associated with hazardous chemical use in the laboratory.  The plan applies to all employees working in laboratories involving use of hazardous chemicals. Personnel covered by the plan should be familiar with the CHP and have continuous access.