Oola PWS - Carrigmore BH

Transcription

1 Water Framework Directive Groundwater Monitoring Programme Site Information Oola PWS - Carrigmore BH ImagePath1: Oola PWS - Carrigmore BH\OolaPWSCarrigmore1.jpg Oola PWS Carrigmore BH is a borehole used to supplement Oola and Doon PWS. It has an average abstraction rate of 150 m³/day. August 2011

2 Site Name: RBD: Site Use: Oola PWS - Carrigmore BH Shannon IRBD Easting: Northing: Drinking Water (PWS) Hydrometric Area: 25 Townland: Ownership: Water Quality Monitoring Network: CARRIGMORE Co Co. South east corner of small field bordering road. SITE INFORMATION County: EU Reporting Code: GWB Name: GWB Code: Drinking Water Code: Water Level Monitoring Network: Level Slieve Phelim IE_SH_G_ PUB1043 Surveillance Operational (Point) Operational (Diffuse) N N N N Flow N Site Comments: Location and Access Information: SITE DIRECTIONS Additional Comments: Tom Carmody is the contact for Doon, Oola, Pallas Green. Monitoring Point Type: Borehole Log Available: Top of Casing (m agl): BH WELL INFORMATION Abstraction Rate (m³/d): 150 Ground Elevation (m OD): 90 Total Drilled Depth (m bgl): Depth to Bedrock (m bgl): Upper Casing Diameter (mm): 250 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): Screen Type (PVC,Steel,other): Screen Slot Size (mm): not grouted Grouted above (m bgl): Grout Volume Injected (m³): Gravel Pack Interval (m bgl): Potential Yield (m³/day): Gravel Pack Volume (m³): Open Hole Interval (m bgl): Specific Capacity (m³/d/m): Comments on Monitoring Site: Static Water Level (m bgl): Scheme Name: Source Report Info: Oola PWS/Doon PWS Number of Abstraction Points in the Scheme: 3 Source Report Available N Scheme Summary: Oola PWS comprises 2 developed springs. A BH at Carrigmore is used to feed into both Oola and Doon, it abstracts 150 m³/day. It is also known that water from the Shannon is occasionally brought into the network. Page 2 of 5

3 HYDROGEOLOGY GEOLOGY Soil: Subsoil: Bedrock: Shallow well drained mineral (BminSW) Bedrock at or close to surface (Rck) Dinantian Lower Impure Limestones Subsoil Permeability: n/a HYDROGEOLOGY Aquifer Category: Vulnerability Ll at Monitoring X-Extreme Flow Regime: Poorly site: productive ZONE OF CONTRIBUTION Estimated ZOC Size (): ZOC Delineation Comments: 0.31 ZOC Delineated By: TOBIN (CK) Based on geology (fault) and topography and 120% of current abstraction rate. Recharge Est Recharge (mm/yr): Estimate (mm/yr): 211 Groundwater Vulnerability within ZOC (% area): Extreme (X) Extreme (E) High 0 Moderate 0 Low 0 High to Low 0 Unclassified 0 Hydrochemical Signature: Ca-HCO3 HYDROCHEMISTRY No available data. Alkalinity (mg/l HCO3): Hardness (mg/l CaCO3): Conductivity (us/cm): Monitoring Record Period: Pressure (e.g., Nitrates, Phosphates, Abstractions): Average: Average: Average: From: Range: Range: Range: To: Additional Water Chemistry Information: RISK ASSESSMENT Typical Contaminants: Risk Category: At risk, low confidence GWB Status: Good Impact Potential within ZOC (% area): Extreme: 0.00 High: Moderate: 0.00 Low: 0.00 Negligible: 4.45 OTHER INFORMATION Page 3 of 5

4 Borehole Pump House 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 PUB1043 / 13EPA002 Location Map for Carrigmore Abstractions

7 Ll Ll Pl Rkd Ll Rkd / 13EPA002 Ll Ll Aquifer Category Map for Carrigmore Abstractions Ll Pl Fault Rkd

8 PUB1043 / 13EPA002 Bedrock Map for Carrigmore Abstractions Fault Dinantian (early) Sandstones, Shales and Limestones Dinantian Lower Impure Limestones Dinantian Pure Unbedded Limestones

9 PUB1043 / 13EPA002 Groundwater Vulnerability Map for Carrigmore Abstractions E (Rock near surface or Karst) M (Moderate) Water E (Extreme) L (Low) No Data H (High) HL (unmapped - High to Low)

10 PUB1043 / 13EPA002 Subsoils Map for Carrigmore Abstractions Alluvium Bedrock outcrop or subcrop Lacustrine sediments Till derived from Devonian sandstones Karstified bedrock outcrop or subcrop

11 PUB1043 / 13EPA002 Bedrock Map for Carrigmore Abstractions Acid Deep Well Drained Mineral Acid Deep Poorly Drained Mineral Basic Shallow Poorly Drained Mineral Mineral Alluvium Basic Shallow Well Drained Mineral Lacustrine