Cabinets shall be braced for seismic activity in accordance with the California Building Code.
Cabinets shall be mechanically ventilated in accordance with the California Mechanical Code with not less than six air changes per hour.
The average velocity of ventilation at makeup air openings with cabinet doors closed shall be not less than 200 feet per minute (1.02 m/s).
Ozone gas generator rooms shall be mechanically ventilated in accordance with the California Mechanical Code with not less than six air changes per hour. Ozone gas generator rooms shall be equipped with a continuous gas detection system that will shut off the generator and sound a local alarm when concentrations above the permissible exposure limit (PEL) occur.
Ozone gas generator rooms shall not be normally occupied, and such rooms shall be kept free of combustible and hazardous material storage. Room access doors shall display an approved sign stating: OZONE GAS GENERATOR—HIGHLY TOXIC—OXIDIZER.
Ozone gas generators shall be designed to shut down automatically under the following conditions:
- When the dissolved ozone concentration in the water being treated is above saturation when measured at the point where the water is exposed to the atmosphere.
- When the process using generated ozone is shut down.
- Failure of the ventilation system for the cabinet or ozone-generator room.
- Detection of ozone at concentrations above the permissible exposure limit (PEL) or failure of the gas detection system in an ozone-gas generator room.