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2703.5.2 Ventilation Ducting. Product conveying ducts for venting hazardous materials operations shall be labeled with the hazard class of the material being vented and the direction of flow. Add Section 2703.5.4 to read: 2703.5.3 "H" Occupancies. In "H" occupancies, all piping and tubing may be required to be identified when there is any possibility of confusion with hazardous materials transport tubing or piping. Flow direction indicators are required. Amend Section 2703.9.8.1 to read: 2703.9.8 Separation of Incompatible Materials. Incompatible materials in storage and storage of materials that are incompatible with materials in use shall be separated. When the stored materials are in containers having a capacity of more than 5 pounds (2 kg) or 0, 5 gallon (2 L), separation shall be accomplished by: 1. Segregating incompatible materials in storage by a distance of not less than 20 feet (6096 mm) and in an independent containment system, if secondary containment is required. Section 2705 Use, Dispensing and Handling Amend Sec. 2705.4.4 to read: 2705.4.4 Emergency Alarm. When hazardous materials having a hazard ranking of 3 or 4 in accordance with NFPA 704, or 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 (45,720 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. 20.24.270 CFC Chapter 31 amended -Corrosive Materials-Definitions. CFC Section 3102-Definitions amended: Section 3102 Definitions Corrosive Liquid. Corrosive liquid is a liquid which, when in contact with living tissue, will cause visible destruction or irreversible alteration of such tissue by chemical action. Examples include acidic, alkaline or caustic materials. Such material will be considered corrosive when the Ph is 2 or less or 12.5 or more, except for foodstuffs or medicine. Included are Department of Transportation and Title 22, California Code of Regulations, 66261.22 classed corrosives. 20.24.280 CFC Chapter 34 amended -Flammable and Combustible Liquids- Storage. CFC Section 3404-Storage amended: 95