Water Framework Directive. Groundwater Monitoring Programme. Site Information. Lanesboro - ESB

Transcription

1 Water Framework Directive Groundwater Monitoring Programme Site Information Lanesboro - ESB ImagePath1: Lanesboro - ESB\Laneboro Borehole.jpg Lanesboro ESB is a borehole that is part of the Lanesboro public water supply. The borehole is abstracting approximately 2000m³/day. August 2011

2 Site Name: RBD: Site Use: Lanesboro - ESB Shannon IRBD Easting: Northing: Drinking Water (PWS) Hydrometric Area: 26 Townland: Ownership: Water Quality Monitoring Network: RATHCLINE Co Co SITE INFORMATION County: EU Reporting Code: GWB Name: GWB Code: Drinking Water Code: Water Level Monitoring Network: Level Lanesborough IE_SH_G_ PUB1009 Surveillance Operational (Point) Operational (Diffuse) N N N N Flow N Site Comments: Lanesboro PWS comprises a borehole at the ESB power station and a further two boreholes at Lisreevagh - See Lanesboro Lisreevagh. Location and Access Information: SITE DIRECTIONS In Lanesborough, the ESB site is on the right hand side leaving the village before the river. Additional Comments: Monitoring Point Type: Borehole Log Available: Top of Casing (m agl): BH WELL INFORMATION Abstraction Rate (m³/d): 2000 Ground Elevation (m OD): 45 Total Drilled Depth (m bgl): Depth to Bedrock (m bgl): Upper Casing Diameter (mm): Lower Casing Diameter (mm): Final Borehole Depth (m): Upper Casing Bottom Depth (m bgl) : Lower Casing Bottom Depth (m bgl): Screen Interval (m bgl): Grout Type (cement,bentonite): Gravel Pack Interval (m bgl): Potential Yield (m³/day): Screen Type (PVC,Steel,other): Screen Slot Size (mm): Grouted above (m bgl): Grout Volume Injected (m³): Gravel Pack Volume (m³): Open Hole Interval (m bgl): PH Mc Carthy are engineers working on the scheme. Specific Capacity (m³/d/m): Comments on Monitoring Site: Static Water Level (m bgl): Scheme Name: Source Report Info: Lanesboro PWS Number of Abstraction Points in the Scheme: 3 Source Report Available N Scheme Summary: Lanesboro consists of three boreholes (1 at ESB and 2 at Lisreevagh) abstracting approximately 4000m³/day. ESB BH provides approximately 2000m³/day. BH 1 at Lisreevagh abstracts 1100m³/day and BH 3 abstracts 800m³/day. Page 2 of 5

3 HYDROGEOLOGY GEOLOGY Soil: Subsoil: Bedrock: Made/Built land (Made) n.a. (Made) Dinantian Pure Bedded Limestones Subsoil Permeability: Moderate HYDROGEOLOGY ZONE OF CONTRIBUTION Aquifer Category: Estimated ZOC Size (): ZOC Delineation Comments: Rkc Vulnerability at Monitoring High Flow Regime: Karstified site: 5.85 ZOC Delineated By: TOBIN (CK) Recharge Est Recharge (mm/yr): Estimate (mm/yr): ZOCS prepared for boreholes at Lisreevagh and ESB. Highly difficult to delineate ZOCs which are based on geology, topography, abstraction rate and assumed groundwater flow directions (SE-NW / E-W). ZOCs require considerable field mapping to define flow direction. The ZOC accounts for 100% of the abstraction rate; assumed that there is hydraulic connection with the Shannon. 129 Groundwater Vulnerability within ZOC (% area): Extreme (X) 3.08 Extreme (E) 3.65 High Moderate Low High to Low 0 Unclassified 0.43 Hydrochemical Signature: Ca-HCO3 HYDROCHEMISTRY Alkalinity (mg/l HCO3): Hardness (mg/l CaCO3): Conductivity (us/cm): Monitoring Record Period: Pressure (e.g., Nitrates, Phosphates, Abstractions): Average: Average: Average: 550 From: 2001 Diffuse Range: Range: Range: To: 2007 Additional Water Chemistry Information: RISK ASSESSMENT Typical Contaminants: Phosphate Risk Category: At risk, high confidence GWB Status: Poor Impact Potential within ZOC (% area): Extreme: 0.00 High: 2.84 Moderate: Low: Negligible: OTHER INFORMATION Page 3 of 5

4 Boreholes Boreholes Sampling Tap Page 4 of 5

5 Data Summary Sheet - July 2011 Disclaimer: The data in this document are based on the best available information and understanding at time of writing. Neither the Environmental Protection Agency, nor the individual bodies supplying data for this document and accompanying maps will be responsible for any loss or damage from the use or interpretation of these data. Rock Unit Geology Map: GSI, 2009 Aquifer Type Map: GSI, 2009 Groundwater Vulnerability Map: GSI, 2009 Soils & Subsoils Type: Teagasc, 2007 Recharge Map: GSI, 2009 Impact Potential Map: EPA, 2009 Risk Assessment Map: EPA WFD Risk Assessment, 2006 Groundwater Body Status: EPA WFD Status Assessment, 2008 Water Quality Data: EPA WFD Monitoring, 2008 Groundwater Threshold Values Groundwater threshold values for selected parameters: Nitrate - General Chemical Test/ Drinking Water Test (37.5 mg/i N03) Ammonium - Drinking Water Test (0.175 mg/i N) / Surface Water Test (0.065 mg/l N) Molybdate Reactive Phosphorus (MRP) - Surface Water Test (0.035 mg/i P) Chloride -Saline/Intrusive Test (24 mg/i) / Drinking Water Test (175 mg/i Cl) Electrical Conductivity -Saline/Intrusive Test (800 µs/cm) / Drinking Water Test (1,875 µs/cm) Further information on groundwater threshold values is contained in the Groundwater Regulations (S.I. No.9 of 2010). General Downgradient Distances General Downgradient Distances (XL) applied to boreholes sourced in bedrock aquifers are constrained to estimate approximate limits based on data at the GSl. ln some cases they may be higher or lower depending on local conditions. Rk, Rkd, Lk Lm Ll, PI 225 m 150 m 60 m It is assumed that groundwater downgradient of a spring cannot flow back up to the spring, however a precautionary 30m buffer is generally applied which allows for instances where pumping under dry weather periods may induce a drawdown or where the ground may be sloping toward the spring from the downgradient side. Version 0: Version 1: Version 2: Version 3: Version 4: Prepared by Date: Prepared by Tobin (CK) Date: Apr 2011 Prepared by Date: Prepared by Date: Prepared by Date: Page 5 of 5

6 Location Map for Lanesboro-ESB

7 Rkc Rkc Aquifer Category Map for Lanesboro-ESB Rkc

8 Bedrock Map for Lanesboro-ESB Dinantian Pure Bedded Limestones

9 Groundwater Vulnerability Map for Lanesboro-ESB H (High) Water E (Rock near surface or Karst) M (Moderate) E (Extreme) L (Low)

10 Subsoils Map for Lanesboro-ESB Made ground Till derived from limestones Water Cutover raised peat Till derived from Lower Palaeozoic sanstones and shales Alluvium Lacustrine sediments Karstified bedrock outcrop or subcrop

11 Soils Map for Lanesboro-ESB Basic Deep Poorly Drained Mineral Cutover/Cutaway Peat Water Acid Deep Poorly Drained Mineral Basic Poorly Drained Peaty Mineral Mineral Alluvium Acid Poorly Drained Peaty Mineral Basic Shallow Well Drained Mineral Lacustrine Basic Deep Well Drained Mineral Basic Shallow Poorly Drained Mineral Made