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Paragraph 16

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Vibro-piling must be used as standard, with percussive piling only used if required to drive a pile to its design depth. If percussive piling is necessary soft-start procedures must be used to ensure incremental increase in pile power over a set time period until full operational power is achieved.

(a)

The sort-start duration must be a period of not less than twenty minutes.

(b)

Should piling cease for a period greater than ten minutes, then the soft start procedure must be repeated.