| (a) A design must include sufficient ventilation to
eliminate an accumulation of fumes or gases at a level that could
adversely impact human health, safety, welfare, or the environment.
(b) An enclosed area that is accessible to individuals
must have automatic mechanical ventilation. Automatic mechanical ventilation
consists of:
(1) a continuous ventilation system that provides at
least one complete air exchange every 10 minutes; or
(2) an intermittent ventilation system that provides
at least one complete air exchange every two minutes.
(c) A sludge processing unit must prevent nuisance
odors.
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