6005.4.3 Signage or marking.

Piping shall be marked, or identified by a durable sign posted on or near the piping that reads, as follows: "OZONE GAS – HIGHLY TOXIC – OXIDIZER".

6005.5 Automatic shutdown.

Ozone gas generators shall be designed to shut down automatically under the following conditions:

   1.   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.

   2.   When the process using generated ozone is shut down.

   3.   When the gas detection system detects ozone.

   4.   Failure of the ventilation system for the cabinet or ozone-generator room.

   5.   Failure of the gas-detection system.

6005.6 Manual shutdown.

Manual shutdown controls shall be provided at the ozone gas generator and, when the generator is in a room, within 10 feet (3048 mm) of the main exit or exit access door.