§ 13.31. Construction, test and inspection.

 (a)  Liquefied petroleum gas tanks shall be designed, constructed, tested and inspected according to § §  3.141—3.145 and 3.151—3.156.

 (b)  Inspection of aboveground tanks shall be according to regular Department procedure.

 (c)  Safety equipment and connections to underground tanks shall be annually inspected by the Department. Complete inspection of the underground tank itself shall be required at least once every 5 years. To comply with this section, a metal plate at least 60 square inches in area and of substantially the same material and finish as the tank, stamped with the number of the vessel, shall be buried adjacent to the tank and dug up at least once every 5 years. If the plate shows evidence of corrosion the tank itself shall be completely exposed for inspection.

 (d)  Annual certificates of operation shall be obtained as required by the act of May 2, 1929 (P. L. 1513, No. 451) known as Boiler Regulation Law (35 P. S. §  1301—1318.1).

   This section cited in 34 Pa. Code §  3.12 (relating to frequency of inspection); and 34 Pa. Code §  13.4 (relating to scope).