Paragraph 16 During Construction, Operation and MaintenanceI1

The undertaker must not discharge waste concrete slurry or wash water from concrete or cement into the river. The undertaker must site concrete and cement mixing and washing areas at least 10 metres from the river or surface water drain to minimise the risk of run off entering the river. If concrete is to be sprayed, suitable protective sheeting must be provided to prevent rebounded or windblown concrete from entering the marine environment. Rebounded material must be cleared away before the sheeting is removed.