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(a) Vapor areas shall be limited to the smallest practical space by maintaining a properly designed system of mechanical ventilation arranged to move air from all directions towards the vapor origin area to a safe outside location. Ventilating systems shall conform to Section 5154.
(b) Required ventilating systems shall be so arranged that the failure of any ventilating fan shall automatically stop any dipping conveyor system.
(c) When a required ventilating system serves associated drying operations utilizing a heating system which may be a source of ignition, means shall be provided for pre-ventilation before heating system can be started; the failure of any ventilating fan shall automatically shut down the heating system; and the installation shall otherwise conform to NFPA Standard for Ovens and Furnaces (NFPA No. 86A1977).
NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
1. Amendment of subsections (a) and (c) filed 11-18-76; effective thirtieth day thereafter (Register 76, No. 47).
2. Amendment of subsection (c) filed 12-5-86; effective thirtieth day thereafter (Register 86, No.51).
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