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RAISED BED PERCOLATION AREA

  • 19-06-2008 10:38am
    #1
    fiestaman
    Registered Users, Registered Users 2 Posts: 1,151 ✭✭✭


    Hi can anyone give rough explanation of this system. also would it be expensive to do.


Comments

  • #2
    sydthebeat
    Subscribers Posts: 41,942 ✭✭✭✭sydthebeat


    see paragraph 4.2 and figure 12

    http://www.epa.ie/downloads/advice/water/wastewater/house/epa_wastewater_treatment_single_houses.pdf

    allow the base line of figure 12 be your water table or rock level and work upwards...


  • #3
    RKQ
    Registered Users, Registered Users 2 Posts: 2,292 ✭✭✭RKQ


    Good quality top soil, with correct T value, for your site. Expect to pay €180 to €200 per load. The raised area needs to be at least 1000mm deep under the percolation pipes, so it could have an overall depth of 1200 - 1500mm.

    The size of the percolation area will be specified on your Soil Suitability Report.The soil on your site soaks too quickly or too slowly. The raised bed is designed to clean the nitrates from the percolation water, before it reaches your site soil.

    Do get the correct soil, at whatever price it is, its extremely important. A good draining brown top soil. The system will fail it you use incorrect soil.

    It will cost more that an ordinary Septic tank installation, due to the construction of the mould before excavation of pipe runs etc. A slow percolating site will require a much larger raised bed.

    You will also need to install a pump, to pump percolation water from the tank up to the pipes in the mound.

    Some people don't like the look of the retangular mound in their garden. There is nothing to stop you blending the mould into your garden, with extra soil. Don't change the mound, just slope the garden around it. A good Landscaper will sort it out. It can look quite attractive.


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