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Session structure Overview Definition & examples Actions Outputs Challenges Exercises

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Module 4 Control measures & risk reassessment. Session structure Overview Definition & examples Actions Outputs Challenges Exercises. Module 4 Control measures & risk reassessment. Overview Document existing and potential control measures Assess their effectiveness (validation) - PowerPoint PPT Presentation
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Page 1: Session structure Overview Definition & examples Actions Outputs Challenges Exercises

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Page 2: Session structure Overview Definition & examples Actions Outputs Challenges Exercises

Session structure

•Overview

•Definition & examples

•Actions

•Outputs

•Challenges

•Exercises

Module 4 Control measures & risk reassessment

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Page 3: Session structure Overview Definition & examples Actions Outputs Challenges Exercises

Overview

• Document existing and potential control measures

• Assess their effectiveness (validation)

• Recalculate risks accounting for existing control measures

• Prioritize risks

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Module 4 Control measures & risk reassessment

Page 4: Session structure Overview Definition & examples Actions Outputs Challenges Exercises

Control measure definition:

Any action or activity that can be used to prevent, eliminate or reduce to an acceptable level any water safety hazard

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Module 4 Control measures & risk reassessment

Page 5: Session structure Overview Definition & examples Actions Outputs Challenges Exercises

Examples – Control measures – low tech

Cover

Well headDesignated bucket

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Module 4 Control measures & risk reassessment

Page 6: Session structure Overview Definition & examples Actions Outputs Challenges Exercises

Examples – Control measures

Module 4 Control measures & risk reassessment

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Source water protected from livestock

Automated chlorine dosing system

Module 4 Control measures &

Page 7: Session structure Overview Definition & examples Actions Outputs Challenges Exercises

Actions

•Identify existing controls

•Document need for new control measures as necessary

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Identify control measures

Assess effectiveness

Reassess risks Prioritize risks

Module 4 Control measures & risk reassessment

Page 8: Session structure Overview Definition & examples Actions Outputs Challenges Exercises

Actions continued...

•Assess effectiveness (normal & exceptional circumstances)

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ValidationInvestigative activity to identify the effectiveness of

control measures. It provides the evidence that elements of the WSP can effectively meet the water

quality targets.

Module 4 Control measures & risk reassessment

Page 9: Session structure Overview Definition & examples Actions Outputs Challenges Exercises

Actions continued...

•Assess effectiveness (normal & exceptional circumstances)

•Monitoring

•Not in isolation but as part of process chain

•Data from studies / historical records

•Introducing contaminant – testing removal

•Sanitary surveys

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Module 4 Control measures & risk reassessment

Page 10: Session structure Overview Definition & examples Actions Outputs Challenges Exercises

Actions continued...

• Reassess risks accounting for effectiveness of control measures

•Based on long-term average performance

•Highlight where controls are not in place

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Module 4 Control measures & risk reassessment

Page 11: Session structure Overview Definition & examples Actions Outputs Challenges Exercises

Actions continued...

•Prioritize all identified risks

•Rank the reassessed risks

•Screen for critical risks

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Module 4 Control measures & risk reassessment

Page 12: Session structure Overview Definition & examples Actions Outputs Challenges Exercises

Outputs

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Module 4 Control measures & risk reassessment

Page 13: Session structure Overview Definition & examples Actions Outputs Challenges Exercises

Challenges

•Uncertainty in prioritizing risks

•Lack of knowledge

•Poor data

•Different approaches = different outcome

•Qualitative versus quantitative

•Assessing effectiveness of certain controls

•Catchment – how to measure/enforce?

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Module 4 Control measures & risk reassessment

Page 14: Session structure Overview Definition & examples Actions Outputs Challenges Exercises

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Exercise•In small groups•Part 1 (5 minutes)

• Match up hazardous events with suitable control measures

• Identify possible control measures for three hazardous events

•Part 2 (5 minutes)• Describe how these control measures can be validated

•Part 3 and 4 (20 minutes)• Reassess the likelihood and severity by considering the

implementation of control measures and rank the risks again from highest to lowest

Module 4 Control measures & risk reassessment


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