OK so you have planning and you have to comply with the Mandatory Elements of SUR 1, so what is involved?
A statement from the appropriately qualified professional confirming that they are qualified in line with the Code definition. A qualified assessor must be Chartered and be a Full Member of either the ICE or CIWEM - this means that most architects cannot undertake these assessments but, crucially, Louisa does have the correct qualifications.
The appropriately qualified professional’s report containing all information necessary to demonstrate compliance with the peak rate of run-off and volume of run-off requirements.
The report should include:
• Areas of permeable and impermeable surfaces on the site pre- and post-development. Where the impermeable area has increased post development the report should also include:
• Details of the permeability characteristics of the site pre- and post-development (e.g. infiltration tests etc., where appropriate)
• Peak rates of run-off (l/s) calculations for the 1 year and 100 year events, pre-and post-development, including an allowance for climate change over the Information to demonstrate that the hierarchical approach to reducing the additional volume of run-off was followed
• Information on the calculation methods used, as well as summary results
A Flood Risk Assessment confirming the risk of flooding from all sources of flooding (this may be contained within the appropriately qualified professional’s report)
Drawings showing the pre-development drainage for the site (natural or constructed)
Drawings showing the proposed drainage solution, system failure flood flow routes, potential flood ponding levels and ground floor levels
Confirmation from the appropriately qualified professional that local drainage system failure would not cause an increase in the risk of flooding within dwellings either on or off site.
Do I automatically get 2 Credits?
Not until you obtain the following:
One Credit can be awarded by ensuring that there is no discharge from the developed site for rainfall depths up to 5mm.
One Credit can be awarded for ensuring that the runoff from all of the hard surfaces receives the appropriate Level of Treatment in accordance with The SUDS Manual to minimise the risk of pollution.