1.1 This Standard covers the design and construction of aboveground steel non-pressure tanks intended for installation inside or outside buildings and for the storage of:

1. A Combustible liquid intended to be used as heating fuel and/or generator fuel; and

2. B Lubricating oil.

In addition to this Standard’s traditional safety requirements that primarily evaluate structural integrity and mitigate fire and environmental hazards from loss of liquid containment under expected normal conditions; optional construction and/or performance requirements, and associated ratings intended to address more severe conditions associated with the effects of Climate Change are included in Appendix D.

NOTE 1: These tanks may also be used for the storage of used oil as a heating and/or generator fuel. For tanks intended for the collection of used oil, refer to CAN/ULC-S652, Standard for Tank Assemblies for the Collection, Storage and Removal of Used Oil.

NOTE 2: For generator-base tanks and workbench tanks, refer to CAN/ULC-S601, Standard for Shop-Fabricated Steel Aboveground Tanks for Flammable and Combustible Liquids.

1.2 This Standard covers single wall tanks, tanks with secondary containment (of double wall and open or closed secondary containment) and double bottom tanks.

1.3 This Standard covers tanks having a maximum capacity of 2500 L.

1.4 This Standard covers tanks fabricated, inspected and tested for leakage before shipment from the factory.

1.5 This Standard covers the design and construction of tanks for use in stationary installations. These tanks are not designed for the transportation of fuel.

1.6 The installation of such tanks shall be in accordance with, but not limited to, any of the following documents:

1. A National Fire Code of Canada, Part 4;

2. B CAN/CSA-B139, Installation Code for oil burning equipment;

3. C CCME Environmental Code of Practice for Aboveground and Underground Storage Tank Systems Containing Petroleum and Allied Petroleum Products; and

4. D Regulations of the appropriate authority having jurisdiction.

1.7 Except for optional Climate Change Adaptation requirements in Appendix D, these requirements do not cover special evaluations for resistance to, or use after, earthquakes, floods, high wind events, or other natural disasters.

NOTE: See the Note at the beginning of Appendix D for further information on the terms “Adaptation” and “Mitigation”, as they pertain to Climate Change.