CAN/ULC-S656:2024

1.1 This Standard provides minimum requirements for shop fabricated single-wall or double-wall oil-water separators intended to collect and separate free oil from water by gravity separation at an inlet free oil concentration not exceeding 2 000 mg/L. 1.2 These oil-water separators are also installed for the capture and retention of oil spills under dry weather conditions up to the free oil retention capacity of the oil-water separator. 1.3 These oil-water separators are intended for installation and operation in accordance with, but not limited to, the following: A Manufacturer’s instructions; B CCME PN 1326, Environmental Code of Practice for Aboveground and Underground Storage Tank Systems Containing Petroleum and Allied Petroleum Products; C CPPI Code of Practice for Management of Water Effluent Quality at Petroleum Storage and Distribution Facilities; and D Regulations of the authority having jurisdiction. NOTE 1: Collection and disposal of the effluent, free oil, and separated solids from oil-water separators is beyond the scope of this document. Consult the authority having jurisdiction for disposal requirements for these substances. NOTE 2: The accumulated solids are to be removed as recommended in the Manufacturer’s Operation and Maintenance Instructions to ensure no adverse effect on the performance of the oil-water separator. 1.4 The requirements of this Standard apply to all oil-water separators. Users are advised that the requirements of AHJs may impose additional performance and testing criteria beyond those described in this document.