Percolation testing

Offaly County Council no longer completes Site Suitability Assessments for On-site Wastewater Treatment (Percolation Testing).

All applicants proposing to submit a Planning Application, where on-site wastewater treatment is required, must engage a suitably qualified Assessor to undertake a Site Suitability Assessment.  

The role of the assessor is to:

  • Conduct the Site Suitability Assessment in accordance with the EPA Code of Practice; Waste Water Treatment & Disposal Systems serving Single Houses (p.e ≤ 10) (2009) or any subsequent amendments. 
  • Recommend suitable type of treatment systems and effluent disposal routes

A suitably qualified person is defined as a person holding professional indemnity of at least €1,000,000, who undertakes the assessment in accordance with the 2009 EPA Code of Practice; Waste Water Treatment & Disposal Systems serving Single Houses (p.e ≤ 10).

Two weeks before completing the assessment a Notification Form is required to be submitted to the Environment & Water Services Section detailing the location, and the proposed date for the test.  The details required are outlined in the attached Notification Form. 

To ensure best practice in the overall context of the proper planning and sustainable development of the area, Offaly County Council will adopt a monitoring/auditing role in relation to this process and will carry out inspections to verify results as required.

The Explanatory Note, also attached, outlines the information to the submitted with the Site Suitability Assessment Report including the EPA Site Characterisation Form.  This information will be submitted as part of the planning application for the proposed development.

 

Details relating to submitting the Site Suitability Assessment are also located on the Planning Section pages at http://www.offaly.ie/eng/Services/Planning/Forms-Including-Planning-Application-Form-/

 

Offaly County Council request that a Site Suitability Assessment be carried out on the development site prior to submitting the application for planning permission.

All commercial developments providing private effluent treatment systems shall comply with the provisions of EPA Wastewater Treatment Manual; Treatment Systems for Small Communities, Business, Leisure Centres and Hotels and any subsequent amendments.

Notification Form - link

Explanatory Notes – link

 

Application for Extension of Appropriate Period (Planning)

If you require an extension of appropriate period and the development includes a septic tank/effluent treatment system, if your Site Suitability Assessment/Percolation Test was undertaken before 2009, you are required to undertake a new assessment in accordance with the EPA Code of Practice; Waste Water Treatment & Disposal Systems serving Single Houses (p.e ≤ 10) (2009) and the criteria outlined above. 

The results of the new assessment and details of any required changes to the proposed septic tank/effluent treatment system should be attached to the planning application for permission to extend the appropriate period.