29 CFR Part 1926
§ 1926.57 — Ventilation
OSHA 1926 · Subpart D — Occupational Health and Environmental Controls. Full current text with cross-references on BuildSpec.
§ 1926.57 Ventilation. (a) General. Whenever hazardous substances such as dusts, fumes, mists, vapors, or gases exist or are produced in the course of construction work, their concentrations shall not exceed the limits specified in § 1926.55(a). When ventilation is used as an engineering control method, the system shall be installed and operated according to the requirements of this section. (b) Local exhaust ventilation. Local exhaust ventilation when used as described in (a) shall be designed to prevent dispersion into the air of dusts, fumes, mists, vapors, and gases in concentrations…
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