California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 7 - General Industry Safety Orders › Group 16 - Control of Hazardous Substances › Article 107 - Dusts, Fumes, Mists, Vapors and Gases › Section 5154.1 - Ventilation Requirements for Laboratory-Type Hood Operations

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) Scope. When
						laboratory-type hoods, also known as laboratory fume hoods, as defined below
						are used to prevent harmful exposure to hazardous substances, such hoods shall
						conform to all applicable provisions of Article 107, and shall conform to
						provisions of this section.
EXCEPTION NO . 1: Inspection doors or clean-out doors
						  in exhaust ducts required by Section
						  5143(a)(3) do not
						  apply to laboratory-type hood operations.
EXCEPTION NO . 2: Biological safety cabinets as defined
						  below are exempt from the requirements of this section. Class II biological
						  safety cabinets may be used to prevent harmful exposure to cytotoxic agents
						  during their compounding or preparation for parenteral use. Biological safety
						  cabinets may be used to control harmful exposure to aerosols and particulate
						  matter, provided the presence of the substance in the biological safety cabinet
						  does not present a risk of fire or explosion. When biological safety cabinets
						  are used to control exposure to these hazards they shall meet the requirements
						  of Section 5154.2.
(b) Definitions.
Biohazard agent means a replication capable pathogen
						  which is a disease causing microorganism and is capable of causing diseases in
						  humans including viruses, microbes and sub viral agents. The agent includes the
						  agent, products of infectious agents, or the components of infectious agents
						  presenting a risk of illness or injury.
Biohazardous materials are any materials that would
						  harbor biohazardous agents such as human blood, body fluids, or tissues that
						  may be contaminated with biohazardous agents.
Biological safety cabinet. A ventilated cabinet which
						  serves as a primary containment device for operations involving biohazard
						  agents or biohazardous materials. Three classes of biological safety cabinets
						  are described in Section
						  5154.2.
Hazardous Substance. One which by reason of being
						  explosive, flammable, poisonous, an irritant, or otherwise harmful is likely to
						  cause injury or illness if not used with effective control methods.
Laboratory-Type Hood. A device enclosed except for
						  necessary exhaust purposes on three sides and top and bottom, designed to draw
						  air inward by means of mechanical ventilation, operated with insertion of only
						  the hands and arms of the user, and used to control exposure to hazardous
						  substances. These devices are also known as laboratory fume
						  hoods.
(c) Ventilation
						Rates.
(1) Laboratory-type hood face
						velocities shall be sufficient to maintain an inward flow of air at all
						openings into the hood under operating conditions. The hood shall provide
						confinement of the possible hazards and protection of the employees for the
						work that is performed. The exhaust system shall provide an average face
						velocity of at least 100 feet per minute with a minimum of 70 fpm at any point,
						except where more stringent special requirements are prescribed in other
						sections of the General Industry Safety Orders, such as Section
						5209. The minimum velocity
						requirement excludes those measurements made within 1 inch of the perimeter of
						the work opening.
(2) When a
						laboratory-type hood is in use to contain airborne hazardous substances and no
						employee is in the immediate area of the hood opening, the ventilation rate may
						be reduced from the minimum average face velocity of at least 100 feet per
						minute to a minimum average face velocity of 60 feet per minute if the
						following conditions are met:
(A) The
						reduction in face velocity is controlled by an automatic system which does not
						require manual intervention. The automatic system shall increase the airflow to
						the flow required by (c)(1) when the hood is accessed.
(B) The laboratory-type hood has been tested
						at the reduced flow rate according to the tracer gas method specified in
						Section 7, Tracer Gas Test Procedure, of
						ANSI/ASHRAE 110-1995, Method of Testing Performance of Laboratory Fume Hoods,
						which is hereby incorporated by reference, and has a hood performance rating of
						4.0 AU 0.1 or less. The test may be performed with or without the mannequin
						described in the ANSI/ASHRAE 110-1995 tracer gas method.
The tracer gas test need only be performed once per
						  hood. However, if employers have chosen to perform the tracer gas test on
						  subsequent occasions, it is the most recent record of test results and test
						  configuration that shall be maintained pursuant to subsection
						  (c)(2)(C).
(C) The record of
						the most recent tracer gas test results and the "as used" test configuration
						shall be maintained as long as the automatic system is operable and thereafter
						for five years.