Standard for Containment Sumps, Fittings and Accessories for Flammable & Combustible Liquids

Note: The scope for this NOI (originally published on September 21, 2021) was updated by the responsible SDO on May 25, 2022.

1.1 This Standard sets forth the minimum requirements for containment sumps, and associated sump fittings and accessories (products) intended for below-grade or at-grade use as an enclosure for the housing of, and access to, underground piping, connector piping, and other fueling system components (such as pumps, valves, sensors, wiring, etc.) in addition to temporary containment of typical liquid fuels as identified in this Standard. These products are intended for use in commercial (public) or private (fleet) automotive fueling station applications or similar fuel dispensing applications, and in piping systems for fuel supply to generators, burners or similar equipment. Some sump fitting or sump accessory products may be optionally evaluated for repair or replacement applications in containment sumps that have been in service.

1.2 Containment sumps may be either primary or secondary constructions of metallic, nonmetallic or composite materials. Typical containment sump types are:

a) Tank sumps - Sumps intended for installation above underground flammable and combustible liquid storage tanks;

b) Dispenser sumps - Sumps intended for installation below flammable and combustible liquid dispensing equipment;

c) Transition sumps - Sumps intended for access to liquid or vapour piping run manifolds, fittings and valves in a fueling system; and

d) Fill/vent sumps - Sumps intended for housing of fill and/or vent pipe ends, drain valves, gauges or monitors connected to the tank.

1.2.1 Sump fittings may be included as either an integral part of the containment sump, or as a field-installed kit, and may include but are not limited to the following sump applications:

a) Penetration fittings - Fittings intended for sealing pipe penetrations through the sump wall;

b) Termination fittings - Fittings intended for connecting pipe terminations at the sump wall;

c) Internal fittings - Fittings intended for connection of working components inside the sump; and

d)Test and monitor fittings - Fittings intended for periodic testing or continuous monitoring of the sump and/or pipe.

1.2.2 Sump accessories may be included as either an integral part of the containment sump, or as a field-installed kit, and may include but are not limited to the following sump applications:

a) Sump covers and sump lids - Covers or lids intended to limit access to the sump with structural and leak resistance features;

b) Sump frames - Frames intended to provide structural support of the sump walls and/or components above or in the sump;

c) Sump brackets - Brackets intended to provide structural attachment points for components inside the sump; and

d) Chase pipe - Soil pipe intended to provide a structural conduit for routing underground carrier pipes for flammable and combustible liquids to and from the sump.

1.3 Containment sumps, fittings and accessories are intended for containment of automotive fuels and exposure to soil fluids that have similar chemical, physical and material compatibility properties as represented by the test liquids in these requirements based on fuels formulated in accordance with 40 CFR Part 80, Regulation of Fuels and Fuel Additives, and meeting the following ASTM Fuel Specifications and blend limitations: Refer to Annex B (Informative) List of Standards on Fuels, for a list of Standards on fuels and other liquids.

a)     ASTM D975, Standard Specification for Diesel Fuel Oils, with biodiesel blends up to a maximum of 5 percent (B5), or CAN/CGSB-3.520, Automotive Low-Sulphur Diesel Fuel Containing Low Levels of Biodiesel Esters (B1-B5);

b)     ASTM D7467, Standard Specification for Diesel Fuel Oil and Biodiesel Blends (B6 to B20), with low biodiesel blends from 6 to 20 percent (B6 to B20), or CAN/CGSB-3.522, Diesel fuel containing biodiesel (B6–B20);

c)     ASTM D4814 Standard Specification for Automotive Spark-Ignition Engine Fuel, gasoline or oxygenated gasoline, with limited ethanol blends up to a maximum of 10 percent (E10), or CAN/CGSB 3.511, Oxygenated Automotive Gasoline Containing Ethanol;

d)     ASTM D5798, Standard Specification for Ethanol Fuel Blends for Flexible-Fuel Automotive Spark-Ignition Engines, with high gasoline/ethanol blends from 51 to 83 percent (E51 - E83), or CAN/CGSB-3.512, Automotive ethanol fuel (E50-E85 and E20-E25); and

e)     Mid Range Ethanol Blends (E11 to E50) using variable mixtures of ASTM D4814 or CAN/CGSB-3.511, Low Blend Ethanol and ASTM D5798 or CAN/CGSB-3.512, High Blend Ethanol.

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

a) In Canada:

1. National Fire Code of Canada, Part 4;
2. CSA B139, Installation code for oil-burning equipment;
3. CCME PN 1326, Environmental Code of Practice for Aboveground and Underground Storage Tank Systems Containing Petroleum and Allied Petroleum Products;

b) In the United States:

1. NFPA 30, Flammable and Combustible Liquids Code;
2. NFPA 30A, Code for Motor Fuel Dispensing Facilities and Garages;
3. NFPA 1, Uniform Fire Code;
4. International Fire Code published by the International Fire Council;
5. Other Applicable Federal and State regulations for the specific product or application it is being utilized in.

1.5 These products are factory manufactured and intended for on-site field assembly, inspection and leak testing for the specified applications and use conditions by qualified persons in accordance with the manufacturer's instructions and local requirements.

1.6 These products are intended to be periodically inspected and maintained for continued service, or taken out of service if necessary by qualified persons in accordance with industry recommended practices and/or the manufacturer's instructions.

1.7 These products have not been evaluated for use after natural disasters, fires or exposures to chemicals not representative of the test liquids or excessive physical damage beyond the expected assembly, installation and uses as identified in these requirements.

1.8 These products have not been evaluated for special use applications where exposed to heavy or continuous physical abuses, excessive mechanical stresses; or environments that operate outside of the expected atmospheric conditions and ambient use temperature range.

1.9 These requirements do not cover underground piping products which are found in the Standard for Nonmetallic Underground Piping for Flammable Liquids, UL 971, the Outline of Investigation for Metallic Underground Piping for Flammable Liquids, UL 971A, CAN/ULC-S660, Standard for Nonmetallic Underground Piping for Flammable and Combustible Liquids, or CAN/ULC-S667, Standard for Metallic Underground Piping for Flammable and Combustible Liquids.

1.10 These requirements do not cover connector piping products which are found in the Standard for Safety for Flexible Connector Piping for Fuels, UL 2039, or CAN/ULC-S663, Standard for Flexible Connector Piping for Fuels, or tank accessories, which are found in the Standard for Fuel Tank Accessories for Flammable and Combustible Liquids, UL/ULC 2583, or CAN/ULC-S633, Standard for Flexible Underground Hose Connectors for Flammable and Combustible Liquids.