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Percolation Test results

  • 23-10-2007 10:15am
    #1
    DBIreland
    Registered Users, Registered Users 2 Posts: 640 ✭✭✭


    Hi all,
    I got the percolation test results this morning, T=7 and P=11.
    In the section where the recommendation is made he has put "Septic Tank and soil percolation area discharging to groundwater".
    I had been told that septic tanks without some kind of filtering had all but been banned. Will I be allowed to have what he has proposed or can the council force me to take a more advanced system?

    Building in County Limerick by the way.

    Any advice appreciated.


Comments

  • #2
    tak
    Closed Accounts Posts: 394 ✭✭tak


    There is some chance that you may be allowed to have a septic tank.
    But the likelihood is that you will be obstructed and encouraged to use a proper sewage treatment unit.
    The filtering is in the percolation trenching that carries the effluent from your septic tank or (I sincerely hope for the sake of your land) a sewage treatment unit. The fact that you have a low percolation time allows you to use a lesser degree of percolation trenching than those of us with a longer percolation time. (The dry weather helped you, maybe.) There is a minimum amount of percolation trenching by the EPA guidelines for single houses, depending on your T/P value and the number of people in your house. Look at page 50 of
    http://www.epa.ie/downloads/advice/water/wastewater/house/epa_wastewater_treatment_single_houses.pdf

    BUT the real thing you ought do, regardless of your being officially able to use a septic tank, is to voluntarily specify a sewage treatment unit as part of your chosen system on the planning application form.
    The proper description of the STU + percolation trenching system is "Mechanical Aeration & Soil Polishing Filter".
    That way the Planning Officer can't obstruct you on environmental grounds.
    Personally I'd also go for a concrete STU as the plastic/fibreglass ones just cannot last long with the sort of bathroom and kitchen bleaches/chemicals being used today.
    When I applied to Kerry CoCo the initial application for Outline Permission was delayed by 2 months when the Planning Officer sought more information and drawings, including a section through the proposed sewage disposal system. They have ways of holding up apparently legitimate applications . . .

    So, basically, for the sake of the land and the expedition of the planning application process you ought voluntarily specify a proper sewage treatment unit and pass up the possibility of using a septic tank.:)


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