4.2.4.1.(1)

Intent 1:

To limit the probability that the method of design of foundations, excavations and soil- and rock-retaining structures will not be based on:

• a subsurface investigation carried out in accordance with Section 4.2., and
• generally accepted geotechnical and civil engineering principles, established local practice or in situ testing of foundation units.

This is to limit the probability of excessive displacement of the ground, which could lead to damage to adjacent buildings.

Intent 2:

To facilitate, through qualification of persons involved with the design and testing, the determination of compliance with this requirement.