The Standard entitled “Occupational Exposure to Hazardous Chemicals in Laboratories” (29 CFR 1910.1450; the “Standard”) applies to laboratories that use hazardous chemicals in accord with the Standard’s definitions for “laboratory use of hazardous chemicals” and “laboratory scale.” The Standard requires these laboratories to maintain worker exposures at or below the permissible exposure limits specified for the hazardous chemicals in 29 CFR part 1910, subpart Z. The laboratories do so by developing a written Chemical Hygiene Plan (CHP) that describes the following: standard operating procedures for using hazardous chemicals; hazard-control techniques; equipment-reliability measures; worker information and training programs; conditions under which the employer must approve operations, procedures, and activities before implementation; and medical consultations and examinations. The CHP also designates personnel responsible for implementing the CHP and specifies the procedures to be used to provide additional protection to workers exposed to particularly hazardous chemicals.