Pennsylvania Code
Title 34 - LABOR AND INDUSTRY
Part I - Department of Labor and Industry
Chapter 14a - STORAGE AND USE OF FLAMMABLE AND COMBUSTIBLE LIQUIDS
Subchapter A - GENERAL PROVISIONS
INSIDE BUILDING STORAGE
Section 14a.33 - Class II and Class III liquids

(a) An unenclosed supply tank larger than 10 gallons shall be placed not less than 5 feet horizontally from any fire or flame either in or external to the appliance being served by the tank.

(b) A supply tank located above the lowest story, cellar or basement shall not exceed 60 gallons capacity, and the total capacity of tanks so located shall not exceed 60 gallons.

(c) Except as set forth in subsection (d), a supply tank shall not be larger than 660 gallons. Not more than one 660 gallon tank or two tanks of aggregate capacity of 660 gallons or less shall be connected to one oil-burning appliance, and the aggregate capacity of such tanks installed in the lowest cellar or basement of a building shall not exceed 1,320 gallons. Such tanks may be installed outside aboveground adjacent to buildings, provided the distance to the line of adjoining property is not less than that required by § 14a.1 (relating to relative location to property) and tanks shall be suitably protected from physical damage incident to outside use. Outside supply tanks may be equipped with an approved manually operated dispensing device that takes suction through the top of the tank for the purposes of dispensing fuel for use in supplemental heating devices which use identical fuels as that stored in the supply tank. Domestic use of beneath building tanks or of inside storage tanks or containers (including drums) that exceed the requirements of § 14a.44 (relating to manner and limitation of storage) is prohibited.

(d) Tanks exceeding 660 gallons individual capacity or 1,320 gallons aggregate capacity in an individual building or in a section of a building separated by fire walls shall be installed in an enclosure constructed in a manner approved by the fire marshal.