CAN/ULC-S675.2-14 Standard for Nonvolumetric Precision Leak Detection Devices for Underground and Aboveground Storage Tanks and Piping for Flammable and Combustible Liquids

National Standard of Canada. The Standards Council of Canada. Underwriters Laboratories of Canada (ULC). This First Edition. Approved by October 2014. 28 p. This Standard provides minimum requirements for primary containment leak detection that uses qualitative characteristics to detect leaks in the primary containment.
Nonvolumetric leak detection devices may be categorized, but not restricted to, one of the following types:
A, Internal Devices designed to operate within a primary containment to assess one or more physical characteristics that would indicate a leak in the primary containment;
B. External Devices designed to operate outside of a primary containment to assess physical characteristics that would indicate a leak in the primary containment; and
C. Interstitial Devices designed to operate within a secondary containment interstice to assess physical characteristics that indicate a leak in the primary containment.