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4.2.2.1.(1)
OS2OP2OP4
ObjectiveOS2 Structural Safety
Attribution
Application
Application 1: 
Subsurface investigation, including groundwater conditions, for the design and construction of excavations and foundation systems.
This applies to buildings described in Sentence 1.3.3.2.(1) of Division A and buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A] that are required to be designed to the requirements of Part 4.
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Intent
Intent 1: 
To limit the probability that the ground conditions below any proposed building will not be taken into account in the design and construction of the excavation and foundation system, which could lead to structural failure, including the collapse of the excavation, which could lead to harm to persons.
Intent 2: 
To facilitate, through qualification of persons involved with the investigation, the determination of compliance with this requirement.
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