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20.24.560 CFC Section 6004.1.17 added — Emergency alarm. Section 6004.1.17 is added to read: 6004.1.17 Emergency Alarm. When toxic gases exceeding 10 cu. ft. and any amount of highly toxic compressed gases are transported through corridors or exit enclosures, there shall be an emergency telephone system, a local manual alarm station or an approved alarm- initiating device at not more than 150 -foot (45720 mm) intervals and at each exit and exit - access doorway throughout the transport route. The signal shall be relayed to an approved central, proprietary or remote station service or constantly attended on -site location and shall also initiate a local audible alarm. 20.24.570 CFC Section 6004.2.2.7 amended — Treatment systems. Section 6004.2.2.7 is amended to read: 6004.2.2.7 Treatment systems. The exhaust ventilation from gas cabinets, exhausted enclosures, gas rooms and local exhaust systems required in Sections 6004.2.2.4 and 6004.2.2.5 shall be directed to a treatment system. The treatment system shall be utilized to handle the accidental release of gas and to process exhaust ventilation. The treatment system shall be designed in accordance with Sections 6004.2.2.7.1 through 6004.2.2.7.5 and Section 505 of the California Mechanical Code. Exceptions: 1. Highly toxic, toxic and moderately toxic gases storage. A treatment system is not required for cylinders, containers and tanks in storage when all of the following are provided: 1.1. Valve outlets are equipped with gastight outlet plug or caps. 1.2. Hand wheel- operated valves have handles secured to prevent movement. 1.3. Approved containment vessels or containment systems are provided in accordance with Section 6004.2.2.3. 20.24.580 CFC Section 6004.2.2.10.2 amended — Alarms. Section 6004.2.2.10.2 is amended to read: 6004.2.2.10.2. Alarms. The gas detection system shall initiate a local alarm and transmit a signal to a constantly attended control station when a short-term hazard condition is detected. The alarm shall be both visual and audible and shall provide warning both inside and outside the area where the gas is detected. The audible alarm shall be distinct from all other alarms. 20.24.590 CFC Section 6004.3.3 amended — Outdoor storage weather protection for portable tanks and cylinders.