(1) Details of piled foundations shall be submitted for the approval of the local authority as [part of the working-drawings provided for in section 14 of chapter 2, and shall include-

a) drawings and complete specifications for the piles and the loads which they have been designed to carry; and

b) if required by the local authority, the designed calculations and the methods proposed for driving or constructing piles.

(2) If deemed necessary by the local authority, tests shall be made, at the owner’s expense, to determine whether the piles will safely carry the loads specified.

(3) Complete field record, giving full details of the construction and the placing or driving of the piles, shall be kept for each pile in all piled foundations by the person constructing such foundations.

(4) Such records shall be available for the inspection by the local authority at all reasonable times.