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4.3.4.2.(1) | Application | Intent |
| OS1 | OH5 |
| Objective | OS1 Fire Safety |
| Attribution | |
| Application | Application 1: Normal and emergency venting of aboveground storage tanks for unstable 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.
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| Intent | Intent 1: To limit the probability that chemical reaction or exposure
to fire will lead to excessive internal tank pressure, which could lead to
the failure of the tank, which could lead to the escape of liquid, which could
lead to the ignition of vapour, which could lead to a fire or explosion, which
could lead to harm to persons. |
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