Soil porosity testing

If you are having an off-mains drainage system installed that is going to involve discharging the effluent to a soakaway, you’ll need a soil porosity test. The purpose of the test is to establish whether the soakaway (aka drainage field) is suitable for the job. Here’s Mark Ward of WES explaining:

Some important facts about soakaways / drainage fields:

Soakaways / drainage fields have to pas certain tests to conform with building regulations. They have to be at least 5 metres away from any building; at least 10 metres from any watercourse or permeable drain and a minimum of 50 metres away from any water abstraction point. You also need to make sure that they aren’t near any other drainage fields, as we have to additionally take into account the general porosity capacity of the wider area is not exceeded

Some terms explained:

Porosity – this is how much water the soil can comfortably hold. Porosity explained on wikipedia

Permiability – this describes how quickly water passes through soil

Retention – retention is how much water is left behind during the process

The importance of Soil Porosity Testing

So this is what happens when you don’t carry out the required soil porosity tests?

An expensive mistake leaving a damaged Biodisc Sewage Treatment Plant and surface pollution.  Our clients previous contractor installed a crate soakaway, these are non-compliant for a reason.

You can see the results here:

Importance of soil porosity testing

Please contact us to help you ensure your installation is carried out correctly and in accordance with the regulations.

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