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Hydrogeology

Hydrogeological assessments would typically be required for facilities in two instances:

  1. For facilities that have had technical amendments to their licence (IPC/IED/Waste) requiring that they assess their impacts on groundwater and compliance with the Groundwater Regulations, 2010. Such licensees must demonstrate compliance with the regulations before the 22nd of December 2015.
  2. For facilities that have discharges to ground. The first step is to describe the receiving environment and develop a Conceptual Site Model detailing pollution sources, pollution pathways and sensitive receptors.

This is then followed by a determination of the appropriate tier of hydrogeological assessment required.

  • Tier 1 – Preliminary site assessment (for low risk sites)
  • Tier 2 – Generic Quantitative Risk Assessment (for moderate risk sites)
  • Tier 3 – Detailed Quantitative Risk Assessment (for high risk sites)

Tier 1 assessment comprises an assessment of past monitoring data, past hydrogeological assessments and publicly available data (e.g. EPA, GSI databases).

Tier 2 assessment involves the above, in addition to further monitoring and a comparison of monitoring results with Generic Assessment Criteria (e.g. Groundwater limits stipulated as per the Groundwater Regulations, 2010).

Tier 3 Assessment involves the above, in addition to a comparison of monitoring results with site specific criteria, calculated in accordance with EPA Guidance on the subject (e.g. using the UK CLEA Model). Typically a Tier 3 assessment would require an in-situ intrusive investigation and a 3rd party contractor would typically be procured to carry out such works.

Upon completion of the hydrogeological assessment we can determine whether a client complies with the Groundwater Regulations of 2010 / the Water Framework Directive ‘Prevent or limit’ Objective. A hydrogeological assessment report will be the final product provided to the client.

Verde have a team of hydrogeologists who are experienced in analysing, controlling and protecting groundwater. We offer our clients the following comprehensive range of hydrogeological assessment services:

  • Source Protection Zones.
  • Geothermal assessments.
  • Water Quality Monitoring.
  • Dewatering design services.
  • Borehole decommissioning.
  • Water treatment installations.
  • Discharge licence applications.
  • Hydrogeological site investigations.
  • Groundwater flooding assessments.
  • Groundwater resource development.
  • Groundwater Abstraction feasibility assessment.
  • Numerical groundwater flow and contaminant transport modelling.
  • Hydrogeological impact assessments and Environmental Impact Statements.
  • Water resource evaluation studies including aquifer testing and interpretation.
  • Groundwater monitoring programmes and use of telemetry monitoring systems.
  • Recharge feasibility assessments and design of trial and full scale recharge systems.
  • Hydrogeological studies on authorisation of discharge to groundwater for wastewater systems.
  • Geothermal feasibility studies and design of abstraction and discharge wells for geothermal systems

Relevant Projects

Hydrogeological and Appropriate Assessment at a site in Co. Kildare

Kinvarra, Co. Galway – Waste Water Treatment System

Irish Distillers Pernod Ricard Ltd, Cork – Hydrological flow monitoring assessment

Tier 2 Hydrogeological Assessment

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