Warning This information has been archived because it is outdated and no longer relevant.

Archived Content

Information identified as archived on the Web is for reference, research or recordkeeping purposes. It has not been altered or updated after the date of archiving. Web pages that are archived on the Web are not subject to the Government of Canada Web Standards. As per the Communications Policy of the Government of Canada, you can request alternate formats on the "Contact Us" page.

4.3.7.2.(1)
ApplicationIntent
OS1OS1OS1OP1OP1OH5OP1OH5
ObjectiveOS1 Fire Safety
Attribution
(a) [F20-OS1.1] Applies to the base and walls of secondary containments being designed, constructed and maintained to withstand full hydrostatic head.
Application
Application 1: 
Design, construction and maintenance of bases and walls of secondary spill containments for aboveground storage tanks--and portable tanks that have a capacity greater than 2 500 L [as stated in Sentence 4.2.1.1.(3)]--for flammable liquids and combustible liquids, in buildings, structures and open areas.
Exceptions: 
except:
  • as exempted in Sentences 4.1.1.1.(2) and (3), which apply to unique hazards at process plants, in transportation, for oil burning equipment, on farms and isolated construction projects, and the storage of aerosol products, and
  • as stated in Sentence 4.10.1.1.(2) and provided in Subsection 4.10.3., which apply to distilled beverage alcohol at distilleries.
Top of Page
Intent
Intent 1: 
To limit the probability that the inability of the secondary containment to resist the hydrostatic load of the liquid it holds will lead to failure of the secondary containment, which could lead to the escape and spread of liquid outside of the secondary containment, which could lead to the ignition of vapour from a nearby ignition source, which could lead to harm to persons.
Top of Page