Summary of Topics

This revision of CAN/ULC-S679 dated September 20, 2021 includes Equivalent Product Leak Test; 6.2.2.

1 SCOPE

1.1 This Standard sets forth minimum requirements for primary carrier, secondary containment, integral primary/secondary, normal vent and vapour recovery, metallic, composite and nonmetallic pipe, fittings, and systems (products) intended for use underground for the distribution and venting applications of petroleum-based flammable and combustible liquids, alcohols, and alcohol-blended fuels as identified in this document.

1.2 For the purpose of this Standard, flammable and combustible liquids mean gasoline, fuel oil, kerosene and diesel fuel, including gasoline with small amounts of additives such as detergents, solvents for detergents and anti-icing chemicals; diesel with up to 5 % biodiesel and gasoline with up to 15 % ethanol.

1.3 This Standard covers metallic, composite and nonmetallic thermoplastic (flexible) and thermoset (rigid) plastic piping with manufacturer-supplied fittings for underground use only. The products covered by this Standard have been evaluated for assembly in normal soil applications by qualified persons in accordance with the manufacturer's instructions.

1.4 The products covered by this Standard have not been evaluated for applications in sumps [more

than 305 mm (12 in)

1.5 Products covered by this Standard are intended to be installed and used in accordance with, but not limited to, any of the following documents:

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

2. B CCME PN 1326, Environmental Code of Practice for Aboveground and Underground Storage Tank Systems Containing Petroleum and Allied Petroleum Products.