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20.24.120 <br />(3) Openings in Buildings Sub- [ii] Where filling shall be <br />ject to Exposure. When an exterior provided with a means of local <br />storage area is located within 75 exhaust, such exhaust shall be <br />feet of a building, openings into designed to capture fumes and <br />the building other than piping vapors. The exhaust shall be <br />shall not be above the height of directed to a treatment system <br />the top of the shielding structure designed in accordance with the <br />referred to in subsection (f)2 of provisions of subsection (e)3 of <br />this section or within 50 feet hori- this section. <br />zontally from the storage area, <br />whether or not protected by a [iii] Stationary tanks shall <br />shielding structure. be provided with a means of <br /> excess flow control on all tank <br />(4) Air Intakes. No exterior inlet or outlet connections. Inlet <br />storage area for regulated materi- connections that are designed to <br />als shall be within 75 feet of any preclude back flow and pres- <br />air intake. sure-relief devices are exempt <br /> from this requirement. <br />(5) Canopies. Portable tanks and <br />cylinders stored outside of build- (7) Gas Cabinets for Leaking <br />ing shall be stored under a canopy Cylinders. <br />constructed of noncombustible <br />materials. Such exterior storage [i] At least one gas cabinet <br />shall not be considered indoor or exhausted enclosure shall be <br />storage. An automatic fire-sprin- provided for the handling of <br />kler system, or alternative systems leaking cylinders. The cabinet <br />as determined by the Fire Chief or enclosure shall be within or <br />for materials incompatible with adjacent to the exterior storage <br />water, shall be provided for cano- area and connected to a treat- <br />pies installed for the storage of ment system as specified in <br />regulated materials. subsection (e)3 of this section. <br />(6) Stationary Tank Controls. [ii] A gas cabinet or ex- <br />Controls on stationary tanks shall hausted enclosure need not be <br />be in accordance with the follow- provided for leaking cylinders if <br />ing: all cylinders are stored within <br />gas cabinets or exhausted enclo- <br />[i] Pressure-relief devices sures. <br />shall be vented to a treatment <br />system designed in accordance (8) Local Exhaust for Leaking <br />with the provisions of subsec- Portable Tanks. <br />tion (e)3 of this section. <br />710-29 (Pleasanton 5-99) <br />