Why Source Control?
Source Control is the treatment and controlled release of storm water runoff at or very near its source. Source Control is the preferred technique for the implementation of SUDS according to the Interim Code of Practice for Sustainable Drainage Systems, PPS25 and PPG3 (see extract below).One of the main benefits of using the SEL Source Control System is that water is treated and subsequently attenuated or infiltrated as close to the surface as possible.
Employing the SEL Source Control System in this manner can lead to a dramatic reduction in the amount of earthworks required on site, and is particularly beneficial where specific problems exist, such as high water tables, contamination, or poor ground conditions (i.e. low CBR). The SEL Permavoid® unit is the only product of its type which is designed to create a structural void within the sub-base layer, substituting expensive imported aggregates.
EA Policy (Revised Draft) Sustainable Drainage Systems (SUDS) Policy No. EAS/0102/1/3
Further Information on SUDS is available from CIRIA, EA or SEPA.
