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Process ventilation.

Municipal Code of Chicago § 14X-6-603.4
in effect
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14X-6-603.4 Process ventilation. Where injurious, toxic, irritating, or noxious fumes, gasses, dusts, or mists are generated, a local exhaust ventilation system must be provided to remove the contaminating agent at the source. Contaminated air must be exhausted to the exterior and not recirculated to any space.
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2676106Fetched: 10/24/2026

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14X-6-603.4 | Corpus