Current through Register Vol. 54, No. 38, September 21, 2024
Section 14a.24 - Design, construction and protection of tanks(a)General. Underground tanks shall be designed and constructed to safely withstand the service to which they are subjected. Tanks shall not contain petroleum products containing mixtures of a non-petroleum nature without evidence of compatibility. This shall include ethanol or methanol blends.(b)Materials. Tanks shall be built of steel except as provided in this subsection. Tanks may be built of materials other than steel for installation underground or if required by the properties of the liquid stored. Tanks built of materials other than steel shall be designed to specifications embodying principles recognized as good engineering design for the material used. Unlined concrete tanks may be used for storing flammable or combustible liquids having a gravity of 40 API or heavier. Concrete tanks with special lining may be used for other services if the design is in accordance with sound engineering practice. Tanks may have combustible or noncombustible linings. Special engineering consideration is required if the specific gravity of the liquid to be stored exceeds that of water or if the tanks are designed to contain flammable or combustible liquids at a liquid temperature below 0°F.(c)Fabrication. Underground tank construction shall be in accordance with the following publications: (1) Underwriters' Laboratories, Incorporated, Standard No. 58-1976, Specifications for Underground Tanks for Flammable and Combustible Liquids, sets forth the minimum requirements for construction of steel underground tanks.(2) Underwriters' Laboratories, Incorporated, Standard No. 1316-83T, Specifications for Glass-Fiber Reinforced Plastic Underground Storage Tanks for Petroleum Products, sets forth the minimum requirements for construction of nonmetallic underground tanks.(d)Protection against corrosion. Tanks shall be protected by: (1) Use of protective coatings or wrappings;(2) Cathodic protection; or(3) Corrosion resistant materials of construction such as special alloys, fiber glass reinforced plastic or fiber glass reinforced plastic coatings, or equivalent approved systems.The provisions of this § 13.24 amended June 22, 1984, effective 6/18/1984, 14 Pa.B. 2131. This section cited in 34 Pa. Code § 14a.21 (relating to location); 34 Pa. Code § 14a.141 (relating to scope and application); 34 Pa. Code § 14a.151 (relating to scope and application); and 34 Pa. Code § 14a.161 (relating to general provisions).