An EPA Site Suitability Assessment is required for all developments that will require a sanitation system on all sites which are not serviced. Simply put this assessment accounts for what was called the percolation test in the past. The test is done in accordance with the code of practice EPA 2009, and its purpose is to ascertain whether or not a site is suitable to treat waste water without the risk of pollution.
If a site is deemed unsuitable to treat waste water then it will not receive planning permission. In this regard an EPA test should preferably be carried out early on in the site feasibility process. An EPA assessment will ascertain what type of treatment system is suitable for a site that passes, e.g. a septic tank or a proprietary treatment system, and the type of percolation area required.
Mechanical evacuation works are required in the subject site for the test to be carried out:
• 3 x 900mm minimum deep holes
• 1 x 2.1m minimum deep
• In addition to the above, 6 no. 300mm square x 400mm deep holes need to be dug by hand with a spade and bar.
The holes will be excavated in a location chosen by Declan Noonan & Associates and close to where the percolation area will be placed, but importantly not within that area. Declan Noonan & Associates attend on site on the day the holes are being excavated at no extra charge in order to pre-empt any unexpected ground conditions being encountered. The holes should also be secured in order to prevent someone or livestock accidentally falling into them. The holes normally will need to be left open for the duration of the planning process unless the Local Authority direct otherwise.
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