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4.11.2.4.(2)
OS1OP3
ObjectiveOS1 Fire Safety
Attribution
Application
Application 1: 
Maximum duration for vehicle operators to leave tank vehicles unattended outside buildings, when parked in a parking space:
  • that is located not less than 15 m from a building, and
  • where the tank vehicle is not exposed to undue hazard from accident or collision.
This applies to tank vehicles for flammable liquids and combustible liquids, while located on properties covered by this Code.
Exceptions: 
except as stated 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.
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Intent
Intent 1: 
To supersede the time limitation of Sentence 4.11.2.4.(1) in order to permit a tank vehicle to be left unattended for more than 1 hour if certain conditions are met.
This is to limit the probability that:
  • the tank vehicle will become involved in a vehicular accident or other impacts, which could lead to damage to the tank vehicle, which could lead to the escape of liquid, which could lead to the ignition of vapour from a nearby ignition source, which could lead to harm to persons nearby, and
  • a fire or explosion involving the tank vehicle will spread to a nearby building, which could lead to harm to persons in the adjacent building.
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