Cal. Code Regs. tit. 8, § 1534 – Flammable Vapors.

(a) Flammable vapors shall be controlled so as to avoid hazard to workers.
(b) No source of ignition such as smoking, gas pilot lights, or operating electrical equipment, other than explosion-proof or equivalent, shall be allowed in a room or building when hazardous concentrations of flammable vapors are present.

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

1. Amendment filed 12-13-84; effective thirtieth day thereafter (Register 84, No. 50).