Page 43 - Bexley SuDS DESIGN & EVALUATION

Additional considerations for infiltrating soils

■ Discharge to protected waters or protected groundwater (e.g. SSSI or SPZ’s) may require
additional treatment stages and liaison with the environmental regulator.

■ More general discharge to groundwater (usually infiltrating soils) can be referenced in table
26.4 of the SuDS Manual. Concept Design

■ Medium pollution hazard level developments will require risk screening to determine

appropriate mitigation measures. Refer to table 26.5 and 26.6 of the SuDS Manual

■ For developments of a high pollution hazard level a detailed risk assessment will be required.

Typical diffuse urban pollution concentrated at
a conventional gully.

38

Linear swales alongside an entrance path at this
infiltration SuDS project,
Burlish Primary School.

London Borough of Bexley SuDS D & E Guide © 2018 McCloy Consulting & Robert Bray Associates