§ 13.15. Location of tanks and cylinders.

 (a)  Tanks and cylinders shall be located outside of buildings other than buildings especially provided and meeting industry standards for this purpose, except that cylinders may be temporarily used indoors under all of the following conditions:

   (1)  If used for demonstration purposes and the cylinder has a maximum water capacity of 12 pounds.

   (2)  If used with a completely self-contained gas hand torch or similar equipment, and the cylinder has a maximum water capacity of 2-1/2 pounds.

   (3)  When used for industrial purposes, the maximum capacity limitation may be extended up to 300 pounds.

   (4)  When used as motor fuel in industrial trucks covered by industry standards.

 (b)  Whenever it is practicable, tanks shall be installed above ground. When installed below ground, they shall conform to all of the following requirements:

   (1)  Before installation they shall be treated with a special corrosive resisting coating, which shall consist of the following:

     (i)   Hot-dip galvanizing.

     (ii)   Two preliminary applications of red lead followed by a heavy coating of coal tar or asphalt, or other approved treatment.

   (2)  During the operation of placement underground, care shall be taken to prevent damage to the coating on the tank.

   (3)  Proper care shall be taken in the selection of the spot where the tank is placed so that adequate precautions can be taken to avoid future shifting and settling.

   (4)  Inspection certificates shall be posted and kept readily available to Department inspectors.

   This section cited in 34 Pa. Code §  13.4 (relating to scope); and 34 Pa. Code §  13.96 (relating to filling of cylinders).