Exhaust from ventilation systems shall discharge in such a manner that the contaminated air being exhausted will not present a health hazard to any workman or reenter buildings in harmful amounts.
[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060. 07-23-072, ยง 296-62-13620, filed 11/19/07, effective 1/2/08.]