Our team have installed a modern Sewage Treatment Plant and Borehole Soakaway at a new build eco house in Berkhamsted. The new Klargester Sewage Treatment Plant was installed to the side of the driveway. Percolation testing was carried out on the subsurface geology at the site, and found to be impermeable heavy clay and as a result a deep borehole soakaway was designed and drilled. We drilled two Soakaway boreholes on site, the first to take away the treated final effluent from the Sewage Treatment Plant. The second borehole is for rainwater collected off the new building.