§ 14a.24a. Tank openings and vents for underground tanks.
(a) Connections for all tank openings shall be liquid tight.
(b) Openings for manual gaging, if independent of the fill pipe, shall be provided with a liquid-tight cap or cover. Covers shall be kept closed when not gaging. If inside a building, each such opening shall be protected against liquid overflow and possible vapor release by means of a spring loaded check valve or other approved device.
(c) Fill and discharge lines shall enter tanks only through the top. Fill lines shall be sloped toward the tank.
(d) For class IB and class IC liquids 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 by terminating within six inches of the bottom of the tank.
(e) Filling and emptying and vapor recovery connections for class I, class II, or class III 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 shall be closed and liquid-tight when not in use and shall be properly identified.
(f) Tank openings provided for purposes of vapor recovery shall be protected against possible vapor release by means of a spring-loaded check valve or dry-break connection or other approved device unless the opening is pipe-connected to a vapor processing system. Openings designed for combined fill and vapor recovery shall also be protected against vapor release unless connection of the liquid delivery line to the fill pipe simultaneously connects the vapor recovery line. All connections shall be vapor-tight.
Source The provisions of this § 13.24a adopted July 17, 1981, effective July 18, 1981, 11 Pa.B. 2571; transferred from 37 Pa. Code and renumbered as 34 Pa. Code § 14a.24a, February 28, 2014, effective March 1, 2014, 44 Pa.B. 1233. Immediately preceding text appears at serial page (259923).
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