Paragraph 18 During Construction, Operation and MaintenanceI1

Vibratory piling must be used as standard, with percussive piling only used if required to drive a pile to its design depth and where drill or vibratory piling has been unsuccessful. 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.

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

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