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8.2.2.1.(1)
OS5OS5
ObjectiveOS5 Safety at Construction and Demolition Sites
Attribution
Application
Application 1: 
Water buildup in excavations.
This applies to excavation work at sites where buildings are undergoing construction, alteration or demolition, including any incomplete or abandoned buildings.
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Intent
Intent 1: 
To limit the probability that water will cause the failure of the sides of the excavation, which could lead to the ground surrounding the excavation collapsing into the excavation, which could lead to harm to persons.
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