Risk Assessment Related to Ontario Drinking Water Quality Standard

Transcription

1 Public Works Hamilton Water Division, City of Hamilton, Ontario Risk Assessment Related to Ontario Drinking Water Quality Standard AAC Conference, Halifax, N.S., Providing services that bring our City to life! Presented by: Susan Girt, BES, MCIP, RPP, EP(EMSLA) Senior Regulatory Coordinator, Hamilton Water 1

2 Purpose of Presentation Hamilton and its Drinking Water Systems (DWS) Stakeholders Legislative Drivers - Walkerton Incident Ontario s Legislative framework Drinking Water Quality Management System (DWQMS) Risk Assessment - Ensuring Drinking Water Quality and Quantity! How are we doing? 2

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4 City Drinking Water Systems (DWSs) DWSs managed by HW Operating Authority: All above systems fall under the scope of the City s Drinking Water Quality Management System (DWQMS) 4

5 Key Stakeholders for DWSs - Internal Owner: Every person who is a legal or beneficial owner of the City s Drinking Water Systems (DWS) Municipally operated systems Mayor and Council Operating Authority: Staff within Hamilton Water responsible for the operation, maintenance and provision of support services to the City s DWSs plus the Systems Management Representative Top Management: GM Public Works & Director Hamilton Water 5

6 Key Stakeholders for DWSs - External Public Health Services (PHS): Authority to direct Operating Authority to take specific actions related to an adverse water incident Memorandum of Understanding between PHS & Operating Authority (Hamilton Water) Ministry of the Environment and Climate Change (MOECC): DWS Inspections Issues & Amends Permits, Licences Author of DWQMS Standard Accreditation Body (QMI-SAI Global): Accreditation audits & corrective actions Issues Accreditation Certificates to Operating Authorities 6

7 Walkerton Incident 7

8 Walkerton Incident Human Impacts Bruce Davidson Spokesperson for Concerned Walkerton Citizens 8

9 Walkerton Inquiry - Recommendations Justice O Connor: 121 recommendations Recommendations focused on: Drinking-water protection from source to tap Multi-barrier approach Drinking water standards Monitoring & testing Provincial, Owner and Operator roles Quality management Dedicated enforcement Competency of operators and staff 9

10 Drinking Water Legislation Prehistoric Legislation Ontario Water Resources Act Ontario Drinking-Water Objectives Chlorination Bulletin Walkerton Tragedy (May 2000) Post-Walkerton Legislation Ontario Water Resources Act Drinking Water Protection Ontario Drinking Water Standards Chlorination Procedure B13-3 Walkerton Inquiry Reports, Parts 1 & 2 (January & May 2002) Post-Inquiry Legislation Safe Drinking Water Act (SDWA) & Regulations Drinking Water Systems, O. Reg. 170/03 Ontario Drinking Water Quality Standards, O.Reg.169/03 Procedure for Disinfection of Drinking-Water Ontario Water Resources Act & Regulations Water Opportunities & Water Conservation Act Clean Water Act & Regulations 10

11 The Multi-Barrier Approach Walkerton Report identified protective barriers: Water treatment barriers: Source water quality Treatment plant Distribution system Monitoring, testing and reporting Legislative barriers: Safe Drinking Water Act (SDWA) Clean Water Act Institutional barriers: Owner Operator Inspector/regulator 11

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13 Safe Drinking Water Act Requirements: Achieve and maintain Operating Authority accreditation (s.13) Develop & implement a DWQMS (s. 21) Use accredited testing laboratory (s. 11) Develop Operational Plan (s. 16) Obtain Drinking-Water Works Permit (s. 40) Prepare & Submit Annual Report to Council (O. Reg. 170, Schedule 22) 13

14 Municipal Drinking Water Licence Program Drinking Water Works Permit Permit to Take Water Licence to Manage & Operate Financial Plan Accreditation Operational Plan Drinking Water Quality Management Standard 14

15 Elements of the DWQMS Standard 21. Continual Improvement 19. Internal Audits 20. Management Review 1. Quality Management System 2. Quality Management System Policy 3. Commitment and Endorsement 4. Quality Management System Representative 5. Document and Records Control 6. Drinking Water System 7. Risk Assessment 8. Risk Assessment Outcomes 9. Organizational Structure, Roles, Responsibilities and Authorities 10. Competencies 11. Personnel Coverage 12. Communications 13. Essential Supplies and Services 14. Review and Provision of Infrastructure 15. Infrastructure Maintenance, Rehabilitation and Renewal 16. Sampling, Testing and Monitoring 17. Measurement and Recording Equipment Calibration and Maintenance 18. Emergency Management 15

16 Element 2: DWQMS Policy Approved by Council Included In Operational Plan Posted at 26 locations throughout City facilities On the City Web-Site 16

17 Element 7: Risk Assessment The Operational Plan shall document a risk assessment process that: a) Identifies potential hazardous events and associated hazards b) Assesses the risks associated with the occurrence of hazardous events c) Ranks the hazardous events according to the associated risk d) Identifies control measures to address the potential hazards and hazardous events e) Identifies critical control points f) Identifies a method to verify at least once a year, the currency of the information and the validity of the assumptions used in the risk assessment g) Ensures that a risk assessment is conducted at least once every 36 months h) Considers the reliability and redundancy of equipment 17

18 Element 8: Risk Assessment Outcomes The Operational Plan shall document: a) The identified potential hazardous events and associated hazards b) The assessed risks associated with the occurrence of hazardous events c) The ranked hazardous events d) The identified control measures to address the potential hazards and hazardous events e) The identified critical control points and their respective critical control limits f) Procedures and/or processes to monitor the critical control limits g) Procedures to respond to deviations from the critical control limits h) Procedures for reporting and recording deviations from the critical control limits 18

19 Identification of Risks Risk Assessments must consider: Climate change Long-term risks Source water shortfall Extreme weather Large temperature changes of heat and cold Chemical spill to system Sustained pressure loss Backflow 19

20 Identification of Risks Risk Assessments must consider: Terrorism Vandalism Sudden change in raw water Algae blooms Equipment failure If the risks don t apply, then it must be documented somewhere that they were considered but are not applicable. 20

21 Hamilton s Risk Assessment Process Documented procedure Risk Assessment database Risk Assessment Teams Annual interim meetings to review risks for: Horizontal (distribution) Vertical treatment (plant) Vertical wells Every three years redo Data collection for inputs to Risk Assessment meetings Identify hazards and assess risks Confirm operational controls 21

22 Assessing Risk Likelihood: 1 to 5 indicating the probability of the hazard occurring including redundancy of function and reliability of equipment Severity: 1 to 5 indicating the severity of the consequence Risk Factor = Likelihood x Severity 22

23 Assessing Risk Critical Control Risk (CCR): a Risk Factor score of > 10 CCRs can also be identified for medium scores of > 6 < 10 if in professional opinion of team CCRs required for safety become Critical Control Points (CCPs) Control Points required by regulations to meet minimum primary and secondary disinfection are automatically considered CCPs 23

24 Risk Assessment Outcomes - Database 24

25 Risk Assessment Control Measures 25

26 CCPs, CCLs, Emergency & Risk Related Procedures 26

27 Drinking Water: Report Cards Chief Drinking Water Inspector: Annual Report, (released 2015) City of Hamilton recognized for Lynden DWS long-term drinking water advisory due to the presence of lead Drinking Water System Name Inspection Rating Drinking Water Quality (% tests meeting standards) Carlisle 97.29% 100% Freelton 100% 99.57% Greensville 100% 100% Fifty Road 100% 99.16% Woodward 97.23% 99.78% Lynden 96.97% 100% 27

28 Emerging Risks to the DWS Algae Study Blue-green algae (cyanobacteria) in source waters and the toxins (microcystins) they can produce is an increasing concern for water utilities Lake Erie event in Summer 2014 triggered a drinking water ban in Toledo, Ohio Climate Change Frozen Water Services 28

29 Drinking Water Responsibilities It s Our Duty Statutory Standard of Care Legal consequences for negligence Be Informed Ask questions Know and understand procedures Read Council Reports related to DWSs Be Vigilant Complacency can pose greatest risk to our DWSs Health of our community depends on our collective diligence & oversight of the DWSs 29

30 Susan Girt, Hamilton Water Ext