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4.6.6.5.(5) | Application | Intent |
| OS1 | OP1 | OH5 |
| Objective | OS1 Fire Safety |
| Attribution | |
| Application | Application 1: Provision and location of automatically operated valves
designed to open only when the dispenser is being operated and to prevent
gravity draining of the tank in the event of a rupture of the supply line
to the dispenser, at marine fuel-dispensing stations,
where:
Exceptions:
except as exempted in Sentences 4.1.1.1.(2) and (3), which apply to specific 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 limit the probability that damage or rupture of the supply
line to the dispenser will lead to gravity draining of the tank, which could
lead to the escape and spread of liquid, which could lead to the ignition
of vapour from a nearby ignition source, which could lead to harm to persons.
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