Section 570 - Fire Extinguisher Size and Placement for Class B Fires in Flammable Liquids of Appreciable Depth(a) Portable fire extinguishers shall not be installed as the sole protection for flammable liquid hazards of appreciable depth [greater than 1/4 in. (0.64 cm)] where the surface area exceeds 10 sq. ft. (0.93 m2). EXCEPTION: Where personnel who are trained in extinguishing fires in the protected hazards are available on the premises, the maximum surface area shall not exceed 20 sq. ft. (1.86 m2).
(b) For flammable liquid hazards of appreciable depth, a Class B fire extinguisher shall be provided on the basis of at least two numerical units of Class B extinguishing potential per sq ft (0.0929 m2) of flammable liquid surface of the largest hazard area. For fires involving cooking grease or water-soluble flammable liquids, see 566 (b) and 566 (d). EXCEPTION: AFFF or FFFP type extinguishers may be provided on the basis of a 1B rating of protection per sq ft of hazard.
(c) Two or more extinguishers of lower ratings shall not be used in lieu of the extinguisher required for the largest hazard area. EXCEPTION: Up to three AFFF or FFFP extinguishers may be used to fulfill the requirements provided the sum of the Class B ratings meets or exceeds the value required for the largest hazard area.
(d) Travel distances for portable extinguishers shall not exceed 50 ft (15.25 m) as shown in Table 3.(e) Scattered or widely separated hazards shall be individually protected. An extinguisher in the proximity of a hazard shall be carefully located to be accessible in the presence of a fire without undue danger to the operator.Cal. Code Regs. Tit. 19, § 570
1. New section filed 3-4-92; operative 4-3-92 (Register 92, No. 15).
2. Amendment filed 12-27-2001; operative 1-1-2002 pursuant to Government Code section 11343.4 (Register 2001, No. 52). Note: Authority: Section 13160, Health and Safety Code. Reference: Section 13160, Health and Safety Code.
1. New section filed 3-4-92; operative 4-3-92 (Register 92, No. 15).
2. Amendment filed 12-27-2001; operative 1-1-2002 pursuant to Government Code section 11343.4 (Register 2001, No. 52).