Percolation testing is carried out using a range of techniques, each particularly suited to a specific end use.
Water for larger soakaway tests is provided through a large water bowser, typically an 1800 gallon tractor-towed bowser or 3000 gallon road bowser. Water for smaller tests is provided from 5 gallon drums.
Testing can take anywhere from a few hours to several days depending upon ground conditions.
Geotest use a calibrated electronic deep meter measuring from a fixed datum pint, to monitor water levels, ensuring accuracy.
All Percolation Tests are set up by a fully qualified Geo-Environmental Engineer to ensure that the test is located in the optimum location and that the soil is recorded accurately.
Percolation testing being carried out on an old soakaway to assess its suitability for reuse. The site was in Kent, and the project involved the replacement of school buildings. The testing demonstrated that storage and infiltration rates were suitable for re-use and avoided the need for costly new soakaways or a mains storm drainage connection.
Percolation testing in a trial pit in Cornwall, to facilitate the design of new storm water soakaways on a housing development near St Ives.
Artesian ground water on a site in Cornwall, Geotest were monitoring groundwater levels prior to construction of a new industrial development. The high groundwater levels were very significant as the main building was proposed to have a raft foundation, which would be highly susceptible to buoyancy.