Sustainable Drainage Systems Major Design Guidance

This advice sets out the requirements that the LLFA has for drainage strategies and surface water management provisions associated with applications for major development.

Standard 4: water quality

The applicant must provide a section within the Drainage Strategy or a standalone document confirming how this standard has been met.

In relation 4.16.1(b) of the National standards for sustainable drainage systems, ‘the vicinity of the site’ relates to within 100 metres of the infiltration feature with evidence of the same hydrogeological conditions.