ULC 668

This Standard sets forth minimum requirements for the material properties and performance of liners used for secondary containment under and around the area of tanks that are installed aboveground for the storage of flammable liquids and combustible liquids.

Liners used for secondary containment are intended for permanent installation to contain spills or leakage of product for a temporary period. In the event of spills, the removal and cleanup should be done within a period not exceeding 14 days.

NOTE 1: These secondary containment liners are not intended for long term or permanent storage of product spills or leakage. Adequate means of monitoring and cleanup is required along with proper use and installation in accordance with Codes and regulations of the authority having jurisdiction. Please see Clause 1.8.

NOTE 2: In case of product spills or leakage, the secondary containment liners shall be re-evaluated according to the requirements of the authority having jurisdiction.