Attachment 1 Process Specific Ventilation Design ...
gravity exhaust system. If employee health is an issue, additional exhaust ventilation must be used. 29CFR . 29CFR ACGIH Industrial Ventilation . NFPA 30 . Photo Processing . LEV/ GMV . For open tray processing, a local exhaust ventilation system shall be operated to provide 75 fpm air velocity above the furthermost edge of ...