What size is a percolation area?

A typical percolation system is composed of a series of trenches half a meter wide and 18m long.

How do you construct a percolation area?

A percolation test can be carried out by digging a hole at 300mm square to a depth of around 250mm at the site where a septic tank is proposed to be installed. The soil is then saturated fully with water and leave overnight. Refill the hole with water and record the time taken for the water to seep away.

Is a percolation test mandatory?

The percolation test is the LAST of the 3 mandatory tests to determine if a new or replacement soakaway can be installed. You must do the Groundwater Source Protection Zone search and the Trial Site Assesment Hole first. They are only for rainwater and surface water soakaways.

How far does a boundary have to be from a septic tank?

No part of the drainage field should be within 2 metres of a neighbouring boundary. It should be at least 15 metres from any building. It should be at least 50 metres from a water supply (e.g. well). No access roads, driveways or paved areas should be located within the area.

What is a good percolation test result?

A minimum value of 15 ensures that the soil’s percolation rate is slow enough to allow the effluent to be sufficiently treated before reaching the ground water. Any value lower than 15 would mean that the untreated effluent could drain away too rapidly and pollute the groundwater.

What is a percolation field?

A percolation test (colloquially called a perc test) is a test to determine the water absorption rate of soil (that is, its capacity for percolation) in preparation for the building of a septic drain field (leach field) or infiltration basin.

Can I do a percolation test myself?

The test itself is fairly simple; dig a hole of a certain size where you’re drainage field is going to be, fill it with water, and see how long it takes for the water to disappear. To get the most accurate results, and do the test right, there’s a bit more devil in the detail.

Are cesspits legal?

A cesspit is a sealed, fully-enclosed tank that collects and stores sewerage – it doesn’t treat it in any way. If you have a cesspit on your property, you don’t need to register it. However if you plan to install a new one you will need planning permission and building regulations approval to do so.

Where are the percolation test holes in Arizona?

(See set back requirements sheet) The location of the percolation test hole(s), soils evaluations and soils observation trenches test hole(s), by dimensions to property lines. All individual disposal system components including reserve area properly marked and located at specified distances.

How long does a percolation system last for?

If constructed correctly, and the site has the right conditions a standard percolation system will last trouble free for many years with little maintenance. A typical percolation system is composed of a series of trenches half a meter wide and 18m long.

How does a percolation area work in a septic tank?

How does a percolation area work? A percolation system is now standard for all new septic tanks installed in Ireland today. These systems are engineered to treat the partially treated effluent from the septic tank and to distribute this treated liquid into the underlying ground water.

What causes a percolation system to go bad?

Errors are often made when constructing percolation systems, which often lead to failure of the system. It is important that the distribution stone used in the trench is clean as residue on dirty stone can settle on the bottom of the bed creating an impermeable layer causing the percolation area to fail.