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18-28-502.15.2  Operation.
   The mechanical ventilation system shall operate continuously.
   Exceptions:
      1.   Mechanical ventilation systems that are interlocked with a gas detection system designed in accordance with the Chicago Fire Code.
      2.   Mechanical ventilation systems in garages that are used only for the repair of vehicles fueled by liquid fuels or odorized gases, such as CNG, where the ventilation system is electrically interlocked with the lighting circuit.
18-28-502.16  Tire rebuilding or recapping.
   Each room where rubber cement is used or mixed, or where flammable or combustible solvents are applied, shall be ventilated in accordance with the applicable provisions of NFPA 91.
18-28-502.16.1  Buffing machines.
   Each buffing machine shall be connected to a dust-collecting system that prevents the accumulation of the dust produced by the buffing process.
18-28-502.17  Specific rooms.
   Specific rooms, including bathrooms, locker rooms, smoking lounges and toilet rooms, shall be exhausted in accordance with the ventilation requirements of Article 4, Ventilation.
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