Current environmental policies require developers to minimise the impact of new developments on the potential for flooding. To reduce this impact developers need to reduce rapid runoff into water courses and avoid discharging surface water, wherever possible, into existing sewers.
To achieve this it is common for drainage engineers to initially consider whether soakaway construction at the site will viably cater for runoff from pavements and roofs. Many water companies will only allow connection to existing drainage if it can be demonstrated that on site soakaways are not viable.
We can undertake trial pit soakage testing in full accordance with Building Research Establishment (BRE) Digest 365, or alternatively soakage tests within boreholes, to provide infiltration rates for the soils, for use in soakaway design.