Los Angeles County Municipal Code Part I Definitions

Section 1. - Definition of Terms

For the purposes of these rules and regulations the following definitions shall apply.

Corrosive—Any substance which on contact will cause destruction or damage to living tissue by chemical action. This

term shall not refer to action on inanimate surfaces.

General ventilation—Introduction of uncontaminated air into an area, room or building or exhausting air therefrom by

other than local exhaust ventilation systems.

Hood—Any air intake device connected to an exhaust ventilation system or duct to capture and remove dusts, fumes,

gases, vapors, mists, smoke, heat or otherwise provide local exhaust ventilation.

Irritant—Any substance not necessarily corrosive as defined in Section 1.4., but which on either immediate, prolonged or

repeated contact with normal living tissue will induce an inflammation or irritation.

Lateral exhaust—Local exhaust ventilation designed with slots at the periphery or along the midsection of a surface or

tank for the purpose of preventing escape of significant amounts of contaminants to the breathing zone.

Local exhaust ventilation—A ventilating system intended to capture air contaminants at or near their point of origin and

transport them to an approved exhaust system.

Non-ionizing radiation—As related to industrial sources comprises electromagnetic radiation within the spectral range

of approximately 50 to 3 X 1010; including ultraviolet, coherent light, visible infrared and microwave radiation.

Strong sensitizer—A substance which will cause on normal living tissue through an allergic or photodynamic process a

hypersensitivity which becomes evident on reapplication of the same substance.

Maximum Acceptable Concentration—Exposure to dust, fumes, mists, vapors or gases of such concentration as to

produce effects herein defined as harmful. Concentrations which are considered to be the Maximum Acceptable

Concentrations for various substances are listed in Part IX Supplement, Appendix C, Maximum Acceptable Concentrations.