Section 1918.64 - Processing Equipment Location(a) All ignition sources of vapor processing equipment shall be located not less than 18 inches above any tank fill opening, the top of the dispenser island, or grade, whichever is highest. The equipment shall also be located not less than 50 feet from any fuel transfer area and not less than 10 feet from the nearest building or property line which may be built upon. EXCEPTIONS:
(1) Nothing in this section shall prohibit roof mounted equipment.(2) When reduction of the required 50 feet clearance from the fuel transfer area is necessary, as determined by the enforcing authority, ignition sources of vapor processing units shall be installed in conformance with the following table: | Clear Distance Available (Ft) | Required Height Above grade (Inches) | |
| 50 | 18 | |
| 40 | 30 | |
| 30 | 42 | |
| 20 | 48 | |
(b) When the processing unit location site is lower than the tan fill opening or the top of the dispenser island, the difference in elevation shall be added to the elevation requirements set forth in (a) of this section.(c) When the required 10 foot distance to an adjacent property line which may be built upon cannot be obtained, an open-top enclosure of not less than 2-hour noncombustible fire-resistive construction which shall extend from the mounting base or slab to an elevation not less than 18 inches higher than the highest elevation of the processing equipment shall be provided on the property line side. Doors installed in the enclosure walls shall be of noncombustible construction including the door frames. Ventilation openings, except in the property line wall, shall be provided at slab level to eliminate the accumulation of flammable vapors within the enclosure as deemed necessary by the enforcing authority having jurisdiction.(d) Where site configuration makes adherence to equipment location elevation requirements impossible or impracticable and the equipment is located below grade or within roofed enclosures, such below grade or roofed area shall be provided with mechanical ventilation providing not less than 6 complete air changes per hour at all times. All such equipment shall meet Class 1, Division 1 requirements as set forth in Part 3, Title 24, CAC.Cal. Code Regs. Tit. 19, § 1918.64
1. Renumbering and amendment of former Section 1918.64 to Section 1918.65, and renumbering of former Section 1918.63 to Section 1918.64 filed 9-27-85; effective thirtieth day thereafter (Register 85, No. 41). Note: Authority cited: Section 41956, Health and Safety Code. Reference: Sections 41956 and 41958, Health and Safety Code.
1. Renumbering and amendment of former Section 1918.64 to Section 1918.65, and renumbering of former Section 1918.63 to Section 1918.64 filed 9-27-85; effective thirtieth day thereafter (Register 85, No. 41).