EPA Guidance On Borehole Construction & Wellhead Protection Ms. Criona Doyle Office of Environmental Enforcement Environmental Protection Agency 19 th April 2018. 1
Introduction Why important ? • Guidance documents • Groundwater flow and potential contamination • Critical factors in design & construction • Further information •
Why Important ?
Why important ? 170,000 private wells • Estimated up to 30% have E. coli • Microbial pathogens e.g. E. coli cause gastrointestinal disease • Increase in VTEC in recent years • VTEC cases 4 times more likely where private well water • consumed
VTEC Figures
Guidance Documents
Guidance Documents IGI Water Well Guidelines (2007) – 3 booklets • http://igi.ie/publications/guidelines/ EPA Advice Note 14: Borehole Construction & Wellhead • Protection (2013) https://www.epa.ie/pubs/advice/drinkingwater/EPA_DrinkingW ater_AdviceNoteNo14b_web.pdf
Groundwater Flow
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Checklist Surface water ingress ? • Well Cap ? • Well Grouted ? • Borehole log ? • Water tested ? •
Design – IGI Guidelines Recommended distances to likely pollution sources • Casing materials • Minimum depth of casing & grout • Headworks details & concrete pad • Pump house •
Installation of Borehole Important Elements • Pump Chamber • Grouting • Pump Position • Well Head Completion •
Grouting
Wellhead Protection Insert picture of •
Well Head Protection
Well Head Protection AIM - PROTECT PUBLIC HEALTH
Further Information EPA Website – Householder Information on Private Wells • http://www.epa.ie/water/dw/hhinfo/
EPA Infographic Insert text •
Web App & Animation Insert text •
How Can You Help ? http://www.epa.ie/pubs/a • dvice/drinkingwater/SS%2 0Wells%20Web.pdf
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