18-28-502.6.4 Dipping operations.

   Vapor areas of dip tank operations shall be provided with mechanical ventilation adequate to prevent the dangerous accumulation of vapors. Required ventilation systems shall be so arranged that the failure of any ventilating fan will automatically stop the dipping conveyor system.

18-28-502.6.5 Electrostatic apparatus.

   The spraying area in spray-finishing operations involving electrostatic apparatus and devices shall be ventilated in accordance with Section 18-28-502.6.3.

18-28-502.6.6 Powder coating.

   Exhaust ventilation for power-coating operations shall be sufficient to maintain the atmosphere below the LFL for the material being applied. Nondeposited, air-suspended powders shall be removed through exhaust ducts to the powder recovery cyclone or receptacle.

18-28-502.6.7 Floor resurfacing operations.

   To prevent the accumulation of flammable vapors during floor resurfacing operations, mechanical ventilation at a minimum rate of 1 cfm/ft 2 [0.00508m 3 /(s x m 2 )] of area being finished shall be provided. Such exhaust shall be by approved temporary or portable means. Vapors shall be exhausted to the exterior of the building.

18-28-502.7 Hazardous materials – general requirements.

   Exhaust ventilation systems for structures containing hazardous materials shall be provided as required in Sections 18-28-502.7.1 through 18-28-502.7.5.