Percolation Ground Testing
What is a percolation test?
A Percolation test is simply observing how quickly a known volume of water dissipates into the subsoil of a hole of known surface area. This test is used to determine the water absorption rate of your ground type in preparation for the building of a wastewater drainage field or percolation area. The results of a percolation test, comprising three test hole results, are required to properly design a waste water treatment system and mandatory for submission of a discharge consent application.
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The Process
On day 1 we allow a six hour window for the percolation test on test hole 1, If the results of this test are longer than six hours it is considered a fail. (Please note that anything under the six hours will be suitable for standard filter bed, anything more than six hours will require a custom design solution for the filter bed/percolation area). The VP must between 15-100.
If the percolation test exceeds 3.5hours on the first day, we will return to site for a second day and if the test exceeds 4.5hours we will need to return to site for a third day.
It is mandatory for all three test results to be submitted along with a discharge to consent application to NIEA. DTS charge for one day percolation test with agreement from the customer that additional payment, will be paid in full should day 2 and 3 be required. The customer accepts that this is largely unknown until after the first day, we can however advise you based on ground types in your area what to expect.
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