Cal. Code Regs. Tit. 8, § 1530 - General Requirements of Mechanical Ventilation Systems
(a) Design and Operation.
(1) When local exhaust ventilation is used,
the system (including exhaust fans, jets, ducts, hoods, separators, and all
necessary appurtenances) shall be designed, constructed, installed, inspected,
tested, maintained, and operated so as to ensure the required protection by
maintaining a volume and velocity of exhaust air sufficient to gather dusts,
fumes, mists, vapors, or gases from the equipment or processes, and to convey
them to suitable points of safe disposal, thereby preventing their dispersion
in harmful quantities into the atmosphere of work rooms or other places where
persons are employed.
(2) When
general mechanical ventilation is used, the volume and distribution of air
shall be sufficient to dilute airborne contaminant concentrations in employees'
breathing zones to safe levels.
(b) Duration of Operations. The exhaust
system shall be in operation continually during all operations for which it is
designed. The system shall continue to operate some time after the cessation of
said operations, the length of time to depend upon the individual circumstances
and effectiveness of the ventilation system.
(c) Disposal of Exhaust Materials.
(1) The air outlet from every dust
separator/collector and the dusts, fumes, mists, vapors or gases collected by
an exhaust or ventilating system shall discharge to the outside atmosphere,
provided that the exhaust system shall discharge to the outer air in such a
manner that it will not cause a harmful exposure in any accessible workplace.
Collecting systems which return air to work areas may be used if contaminants
which accumulate in the work area air do not result in harmful exposure to
employees.
(2) The air exhausted
from blast-cleaning equipment, grinding, buffing, polishing equipment and all
other equipment requiring exhausting of dust or particulate shall be discharged
through dust-collecting equipment. Dust and refuse discharged from an exhaust
system shall be disposed of in such a manner that it will not result in harmful
exposure to employees.
Notes
2. Amendment filed 12-13-84; effective thirtieth day thereafter (Register 84, No. 50).
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
2. Amendment filed 12-13-84; effective thirtieth day thereafter (Register 84, No. 50).
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