The sewage system in the UK is under increasing demands from the increase in rainfall volume and intensity associated with global warming and from the demand of new housing developments.
These pressures required a change in policy approach to a more sustainable system. On 6th April 2015 the government introduced a new planning policy aiming to lessen the likelihood and impact of surface water flooding from new developments of 10 dwellings or more; or equivalent non-residential or mixed development, by encouraging the use of sustainable drainage systems (SUDS).
Soakaways and permeable paving are two types of SUDS which are used to limit the impact of surface water discharge from new building developments. Designing these systems requires careful measurement of soil permeability. We offer a comprehensive range of testing methods compliant with NHBC (Chapter 5.3) and BRE (Document 365) guidance.
The pressure to building new housing seems to be constantly in the news these days. Developers working to meet this demand are increasingly finding that they are required to find sustainable methods for disposing of the rainwater from roofs and paved areas. The days when this could just be discharged to the municipal sewer are long gone. Instead, wherever possible, the water must be disposed of into the ground via soakaways or other similar ‘infiltration features’.
Designing these requires careful measurement of soil permeability. We offer a comprehensive range of testing methods, from hand-dug percolation tests for Sustainable Drainage Systems (SUDS – NHBC Chapter 5.3) to machine-dug test pits for full scale soakaway tests (BRE 365). If site access is limited we can even carry out the requisite testing in boreholes drilled as part of our geotechnical/environmental investigation of the site.