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WSNTG Annual Conference September 2007 Water Services National Training Group 11 th Annual...
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Transcript of WSNTG Annual Conference September 2007 Water Services National Training Group 11 th Annual...
WSNTG Annual Conference September 2007
Water Services National Training Group
11th Annual Conference
6th September 2007
WSNTG Annual Conference September 2007
Drinking Water – 2007 Regs & Crypto Risk Management
Oliver Fogarty
Senior Adviser
DEHLG
Outline of Presentation
PROTECTION OF PUBLIC HEALTH Background to DW Regulations ECJ Judgment & Ireland’s Response to
Date New Regulations & Summary of Key
Changes
Crypto Risk Management
Background to Regulations
Surface Water Directive 75/440/EEC S.I. No. 294 of 1989
Drinking Water Directive 80/778/EEC S.I. No. 81 of 1988 S.I. No. 177 of 2000 S.I. No. 259 of 2003
Drinking Water Directive 98/83/EC S.I. No. 439 of 2000
ECJ Proceedings & Decision
Case No C-316/00 that Ireland failed: In respect of 850 public WSS (T & F
Coli) In respect of > 810 GWSS (T & F Coli) In respect of transposition vis a vis
GWSS
THREAT OF FINES
Response to ECJ
PROTECTION OF PUBLIC HEALTH Section 83 of Local Gov Act
Reduces 88 Sanitary Auth. to 34 City & County Councils
Further amendment of S.I. No. 439 of 2000 Water Services Act (passed May 07)
Streamlines water services legislation Annual WSIP with record funding
EXPENDITURE 1994 - 2007
€0
€100
€200
€300
€400
€500
€600
Total €m
WSIP €m
RWP €m
EXPENDITURE 1994 - 2007
€0€20€40€60€80
€100€120€140€160
0
10
20
30
40
50
RWP €m
RWP %
Response to ECJ
Pilot Source Protection Plan Manual on TS for single houses (EPA) REPS and Good Farming Practice Nitrates Directive/Action Programme WFD Drinking Water National Monitoring NRWMC
Response to ECJ
Implementation of DBO Quality Assurance Scheme (GW) Training & Development (WSNTG) Ongoing reporting to Cion Revised Regulations / Urgent
New Regulations
PROTECTION OF PUBLIC HEALTH
S.I. No. 106 of 2007 08th March 2007, WSP5/07 Incorporated most modifications
S.I. 278 of 2007 12th June 2007, WSP6/07, WSP7/07 Indictable offences, revised Fluoride standard
S.I. 278 of 2007 - General
European Communities (Drinking Water) (No. 2) Regulations 2007
WSP 7/07 (summary) WSP8/07 (letter to group schemes) Largely replicates original 2000 Regs Implementation WG
DEHLG, EPA, CCMA, NFGWSS, NRWMC, WSNTG
Guidance from EPA
Key Changes – Supervision
EPA supervises sanitary authority supplies
Sanitary authority supervises all other supplies
Supervisory authority to carry out periodic audits
Supervisory authority – powers of direct intervention – cost recovery
Key Changes – Offences
Failure to comply with directions Failure to inform SA of incidents Failure to maintain records Failure to inform consumers of incidents Failure to maintain internal plumbing
(where water supplied to public) in safe condition
Summary and Indictable offences
Key Changes – Supervision
PROTECTION OF PUBLIC HEALTH Water Suppliers must comply Intervention (where public health risk)
will be subject to agreement with HSE Maintain register Keep data on monitoring and make
available to public (may be electronic)
Key Changes – Monitoring
Sanitary (Water Services) Authority monitors all supplies
Monitoring programmes subject to approval of EPA
EPA has enforcement powers in respect of monitoring
Key Changes – Water Suppliers
Must inform consumer WS must maintain records of incidents
and general operations and make available to supervisory authority
Key Changes – Remedial Action
PROTECTION OF PUBLIC HEALTH Investigation Discovery of non-compliance Remedial Action Timelines
WSNTG Annual Conference September 2007
Drinking Water – 2007 Regs & Crypto Risk Management
Oliver Fogarty
Senior Adviser
DEHLG
Crypto – Background
Circular Letter L7/98 Protection of Drinking Water Supplies against
contamination from Crypto Guidelines on reducing risk Review action plans and training programmes Good prevention measures Ensure good liaison with Health Boards and
EPA
Crypto – Risk Assessment Crypto (Scottish Water) Directions 2003 NDSC 2004 & EPA Handbook on DW Regs,
Implementation for Sanitary Authorities Quantitative scoring system to determine if high,
moderate or low risk Directions specify frequency of sampling for raw
(catchment risk score + Q) Directions specify frequency of sampling for
treated (catchment risk score +treatment risk score + Q)
Risk Assessment - Model
Quantitative Assessment The degree of exposure to oocysts Agricultural practices Sewage inputs Water source type River and intake management Water treatment Treatment works monitoring Performance and operational factors
Risk Assessment - Model
Score = N x 0.4 x log10(population)
Range Very High > 100 High 76 – 100 Moderate 50 – 75 Low < 50
Crypto Incidents
Incidents linked to Water Supply Mullingar Ennis Carlow Roscommon Portlaw Galway Clonmel
Risk Reduction
Risk Reduction – TreatmentShort Term Operate plant at its optimum design level Avoid overloading plant Avoid bypassing Deal with UFW & leaks
Risk Reduction – TreatmentShort Term Avoid surges in filter operation Never restart without backwashing Allow filters to “ripen” Avoid recycling of backwash when risk is high Evaluate value of coagulant aids Install turbidity monitors on each filter
Generic Monitors
Risk Reduction – TreatmentShort Term Ensure coagulant (dose, brand, type etc) are
optimal Optimise pH for coagulation Evaluate use of flocculant aids Ensure adequate mixing Check sludge bleeds regularly Minimise sludge blanket disturbance by flow
variation or wind effects Backwash filters as frequently as possible
Risk Reduction – TreatmentShort Term Ensure adequate depth of media If possible run filters to waste on start up Strive for lowest possible levels of turbidity Monitor filter headloss For rapid filters consider use of polyelectrolyte
as conditioner Do not use backwash or process water without
special treatment. Flush mains regularly Inspect and clean reservoirs – repair defects
Risk Reduction – CatchmentMedium to Long Term
Catchment management plans – grazing (monthly inspections)
Nitrates Action programme REPS WFD Management of slaughtering/meat processing
plants upstream EPA guidance for single houses Ensure integrity of Borehole linings
Risk Reduction – Conclusion
Treatment Plant Catchment Low Cost
WSNTG Annual Conference September 2007
Water Services National Training Group
11th Annual Conference
6th September 2007