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20.24.120 <br />Sion. Chambers shall be sized to <br />provide protection for piping, <br />valves and instrumentation and <br />to accommodate the expansion <br />of regulated materials. <br />(2) Signage. <br />[i] Stationary above ground <br />tanks shall be placarded with <br />hazard identification signs as <br />specified in Fire Code Standard <br />No. 79-3, for the specific mate- <br />rial contained. <br />[ii] Signs prohibiting <br />smoking shall be posted in <br />indoor storage, use and handling <br />areas and within 25 feet of <br />outdoor storage, use and <br />handling areas. <br />[iii] Signs shall not be ob- <br />scured or removed. <br />[iv] Signs shall be in Eng- <br />lish and such other languages as <br />may be appropriate, as deter- <br />mined by the Fire Chief. <br />[v] Signs shall be durable. <br />[vi] The size, color and <br />lettering shall be in confor- <br />mance with nationally recog- <br />nized standards determined by <br />the Fire Chief to be applicable <br />to the regulated material, (i.e. <br />NFPA 704 System). <br />(3) Inert Gas Purge System. Gas <br />systems for regulated materials <br />shall be provided with individually <br />dedicated inert gas purge systems <br />(e.g., nitrogen, helium, argon and <br />neon). <br />(e) Minimum Threshold Quantity <br />Controls. Responsible persons shall <br />cause materials which do not exceed <br />the Minimum Threshold Quantity to <br />be provided with the controls speci- <br />fied in this subsection (e) and in <br />subsection (f) of this section. <br />(1) Exhaust Ventilation. <br />[i] Storage of cylinders <br />shall be within ventilated gas <br />cabinets, exhausted enclosures <br />or within a ventilated separate <br />gas storage room as defined in <br />the Fire Code. <br />[ii] Storage of portable and <br />stationary tanks shall be within <br />a separate ventilated room with- <br />out other occupancy or use. <br />[iii] If gas cabinets are <br />provided, the room or area in <br />which they are located shall <br />have independent exhaust venti- <br />lation. <br />[iv] Exhaust systems for <br />gas cabinets, exhausted enclo- <br />sures and separate gas storage <br />rooms shall be designed to <br />handle the accidental release of <br />gas. Such exhaust systems shall <br />be capable of diluting, absorb- <br />ing, neutralizing, burning or <br />otherwise processing the entire <br />(Pleasanton 5-99) 710-26 <br />