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 5140 - Definitions

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
As used in Article 107:
Abrasive-blasting respirator. A continuous flow
						  supplied-air respirator constructed so that it will cover the wearer's head,
						  neck, and shoulders to protect him from airborne dust and rebounding
						  abrasive.
Abrasive wheels. An abrasive wheel is a power-driven
						  wheel consisting of abrasive particles held together by artificial or natural,
						  mineral or organic bonds. Metal, wooden, cloth or paper wheels or discs having
						  a layer or layers of abrasive on the surface are not included. Natural
						  sandstones (quarried) are not included.
Administrative control. Any procedure which limits
						  exposure by adjustment of the work schedule.
Blast-cleaning enclosures. These include rotary blast
						  cleaning tables, blast cleaning barrels and drums, abrasive blasting cabinets,
						  blast cleaning rooms, abrasive separators, and similar enclosures. In blast
						  cleaning rooms the operator works inside to operate the blasting nozzle; at
						  blasting cabinets the operator directs the nozzle through openings in the
						  cabinets. In other types of enclosures operation is automatic.
Branch duct. The part of an exhaust system piping or
						  ductwork that is connected directly to the hood or enclosure.
Duct. Any pipe, flume, or channel, forming a part of a
						  ventilating system, used to convey air, dusts, fumes, mists, vapors or
						  gases.
Dust. Particles of solid matter, other than fumes, in
						  such a state of comminution that they may be inhaled.
Engineering controls. Methods of controlling
						  occupational exposure to injurious materials or conditions by means of general
						  or local exhaust ventilation, substitution by a less hazardous material, by
						  process modification, or by isolation or enclosure of health hazard-producing
						  operations or machinery.
Exhaust purifier device. It is given a broad
						  interpretation as any reliable and identifiable appliance added to an internal
						  combustion engine to reduce toxic exhaust products. Special fuel additives may
						  be certified as part of a device provided that other toxic components of
						  exhaust are not increased significantly.
Exhaust system. A complete suction installation
						  including all hoods, ducts, fans, jets, separators, and receptacles when
						  required, and any other part necessary for the proper installation and
						  operation thereof.
Fan. A rotary machine which creates the movement of air
						  in the exhaust or ventilation system.
Fumes. Solid particles generated by condensation from
						  the gaseous state, generally after volatilization from molten metals, etc., and
						  often accompanied by a chemical reaction such as oxidation.
Gas. An aeriform fluid.
General ventilation. That type of ventilation which
						  provides for general movement of air throughout rooms or buildings by either a
						  gravity system or a mechanical system.
Gravity system of ventilation. One which depends wholly
						  upon relative air density.
Harmful exposure. An exposure to dusts, fumes, mists,
						  vapors, or gases:
(a) In excess of any
						permissible limit prescribed by Section
						5155; or
(b) Of such a nature by inhalation as to
						result in, or have a probability to result in, injury, illness, disease,
						impairment, or loss of function.
Hazard. A source of risk, danger, or peril capable of
						  causing injury. As used in Article 107, this meaning refers to dusts, fumes,
						  mists, vapors, gases or chemicals capable of producing adverse health
						  effects.
Hood. A shaped inlet designed to capture contaminated
						  air and conduct it into the exhaust duct system.
Isolated operation. One which is carried on in a
						  location where, or at such time that, no employee except those actually engaged
						  in the operation involved is exposed to the hazards resulting therefrom.
Local exhaust ventilation. A mechanical ventilation
						  system in which a hood is located at or near the point of release of dusts,
						  fumes, mists, vapors or gases.
Main duct. A pipe or duct into which one or more branch
						  ducts enter and which connects such branch ducts to the remainder of the
						  exhaust system.
Mechanical ventilation system. One which depends upon
						  power-driven equipment for its operation.
Mists. Suspended liquid droplets generated by
						  condensation from gaseous to liquid state or by breaking up a liquid into a
						  dispersed state, as by splashing, foaming, or atomizing.
Pitot traverse. The measurement of the air velocity in
						  a duct using a pitot tube at several points in order to obtain an accurate
						  average value of air velocity in the duct.
NOTE: The number of points to be measured depends on
						  the size and shape of the duct. For guidance see Industrial Ventilation, 13th
						  Ed. (1974), American Conference of Governmental Industrial Hygienists.
Separator/collector. The part of the exhaust system in
						  which entrained material is separated from the air which conveys it.
Spray booth or Room. A power-ventilated structure
						  provided to enclose or accommodate a spraying operation, to confine and limit
						  the escape of spray, vapor and residue, and to safely conduct or direct them to
						  an exhaust system.
Toxic material. A material in concentration or amount
						  which exceeds the applicable limit established by a standard, such as Sections
						  5155,
						  5208, and
						  5209 or, in the absence of an
						  applicable standard, which has the capacity to produce personal injury or
						  illness to persons through ingestion, inhalation, or absorption through any
						  body surface.
Vapor. The gaseous form of a substance normally liquid
						  or solid.(Title 24, T8-5140)
1.
						  Repealer and new section filed 7-18-75; effective thirtieth day thereafter
						  (Register 75, No. 29).
2. Amendment filed 7-16-76; effective
						  thirtieth day thereafter (Register 76, No. 29).
3. Amendment filed
						  7-27-77; effective thirtieth day thereafter (Register 77, No.
						  31).
4. Amendment of definition "Harmful Exposure" filed 5-25-79;
						  effective thirtieth day thereafter (Register 79, No.
						  21).
Note: Authority cited: Section
							 142.3, Labor
							 Code. Reference: Section
							 142.3, Labor
							 Code.