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Subchapter 7. General Industry Safety Orders
Group 20. Flammable Liquids, Gases and Vapors
Article 145. Tank Storage

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§5596. Tank Openings Other Than Vents for Aboveground Tanks.

(a) Connections for all tank openings shall be vapor-tight and liquid-tight.
(b) Openings for gaging on tanks storing Category 1 or 2 flammable liquids, or Category 3 flammable liquids with a flashpoint below 100oF (37.8oC), shall be provided with a vaportight cap or cover. Such covers shall be closed when not gaging.
(c) For Category 2 flammable liquids and Category 3 flammable liquids with a flashpoint below 100oF (37.8oC), other than crude oils, gasolines and asphalts, the fill pipe shall be so designed and installed as to minimize the possibility of generating static electricity. A fill pipe entering the top of a tank shall terminate within six inches of the bottom of the tank and shall be installed to avoid excessive vibration.
(d) Filling and emptying connections for Category 1, 2, 3 or 4 flammable liquids which are made and broken shall be located outside of buildings at a location free from any source of ignition and not less than five feet away from any building opening. Such connections for any liquid shall be closed and liquid-tight when not in use and shall be properly identified.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
1. Repealer of subsections (b) and (c) and consecutive relettering of subsections (d)-(f) filed 9-18-80; effective thirtieth day thereafter (Register 80, No. 38).
2. Amendment of subsections (b)-(d) filed 5-5-2014; operative 5-6-2014 pursuant to Government Code section 11343.4(b)(3) (Register 2014, No. 19).

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