DRINKING WATER SAFETY PLANS

Reviewing our DWSP’s and Incorporating DWSP’s into ‘Business as Usual’

Catherine Fearon

Water Quality Manager

South East Water

9th March 2010

Introduction

� The Risk based approach at SEW

– Development of DWSP’s before the Merger

– DWSP’s and the PR09 Process

– SEW DWSP Communication Strategy

� DWSP Review Process

– SEW’s Review Process for Drinking Water

– Safety Plans

� Future Strategies for the Development and Implementation for a Business as Usual Approach to DWSP’s

– Development of the Database

– Improvements to the Intranet site

– Use within the business

Timeline and Milestones

Draft Non PR09 Notices submittedNov 2009

Review – Event Trigger / In line with Audits / Risk basedOngoing

Resubmission following DWI Feedback for additional informationMar 2009

Draft PR09 Undertakings submitted – Signed in January 2010Oct 2009

Embed DWSP database / RA tool into ‘business as usual’Apr 2011

DWI issued guidance on WSP’s. First indications of a merger but ban on communication between companies because of the competition commission.

Oct 2006

Amendments to the Water Supply Regulations 2000: Risk assessments required for all water companies. All PR09 schemes require a valid DWSP and risk assessment. MKW and SEW merge.

Dec 2007

DWI Guidance on submission of Reg 28 forms.Aug 2008

All risk assessments are submitted by this date. SEW (after the merger) submitted 96 Reg 28 forms using the DWI template.

Oct 2008

Former MKW and SEW begun working on WSP’s independently.2005 -

Workshop based DWSP’s

� Likelihood

– Rare (1), Unlikely (2), Possible (3), Likely (4) to Certain (5)

� Consequence

– Insignificant (1), Minor (2), Moderate (3), Major (4) to Catastrophic (5)

� Risk = Likelihood x Consequence

0 = No risk No action required

1-5 = Low risk Control Measure in place within 12 months

6-10 = Medium Risk Control Measure in place within 6 months

11-15 = High Risk Control Measure in place within 1 month

16-25 = V High Risk Control Measure in place immediately

Mid Kent Water Risk Matrix

Data based DWSP’s

Very High Risk Very High Risk Very High RiskHigh RiskModerate Risk5

Very High Risk Very High RiskHigh RiskHigh RiskModerate Risk4

Very High Risk Very High RiskHigh RiskModerate RiskLow Risk3

Very High RiskHigh RiskModerate RiskLow RiskLow Risk2

High RiskModerate RiskModerate RiskLow RiskLow Risk1

EDCBA

CatastrophicEOne off dose

MajorD

ModerateC

MinorB Varies on

Consequence

to health

Cumulative dose

InsignificantA

Severity

Always over PCV(Once a day to once a week)Certain5

Over PCV in most samples(Once a week to once a month)Likely4

Over PCV in half samplesOnce a month to once a year)Possible3

Over PCV occasionally(Once a year to once every 10 years)Unlikely2

Never present in water(Over once every 10 yearsRare1

Likelihood

Former South East Water Risk Matrix

PR09 AMP 5 Programme

An UNACCEPTABLE RISK is one that after control measure (if this exists) risk is still designated as a high risk or very high risk to the customer.

UNACCEPTABLE RISKS identified in DWSP’s formed PR09 application to OFWAT. Quality Scheme approval by DWI and other risks incorporated into Capital Maintenance

AMP5 Programme developed following determination.

RISK BASED APPROACH when planning timescales for programme in conjunction with WQ.

Paddock Wood No. 1

Coggins Mill BH 5

Poverty Bottom WTW

PR09 Notices and UndertakingsSEW currently have:

� 22 PR09 Undertakings and Notices– 11 Cryptosporidium– 6 Metaldehyde– 1 Pesticide– 2 Discolourations– 1 Taste and Odour– 1 Ammonia

� 53 Non-PR09 Notices – 28 Turbidity Monitors– 17 Ingress– 6 Contamination– 1 Oxadixyl– 1 Hydrocarbons

� 36 areas where already addressed Unacceptable Risks (to be updated and submitted to DWI by 31st March 2010)

� 30 Acknowledged Actions

SEW Communication Strategy

INTERNAL COMMUNICATION

During development of DWSP’s� Workshops� Site Visits� Dedicated Intranet Site

Continued Review Process� Water Quality liaison meetings

– Kent– Sussex– Western

� Water Resources liaison meetings� Operations planning liaison meetings� Water Quality team meetings� Customer Technical Centre liaison

meetings

EXTERNAL COMMUNICATION

During development of DWSP’s� EA Workshops� HPA Seminars� LA Attendance at Workshops

Continued Review Process� Bulk supply liaison meetings� EA / Water Company Forums� Annual WQ Meetings with Local

Authorities

Control Measure Reviewed

Review of DWSP’S

Identify Teamand

Responsibilities

Hazard Assessment

Risk Assessment

Control Measures

Management Documentation

Intranet

Resource

Asset

Customer Services

Leakage

Control Room

Water Quality

Production

Distribution

Environmental Team

Risk score evaluated

Relevant control measure emplaced

Evaluated and created by the teams

Established control measure reviewed and validated – is it effective at controlling risk?

Includes hygiene codes, treatment management and DOMS

Development of risk assessments and statements

Current documentation accessible to all teams

Event Triggers

Review Process (in line with audits)

Validation Monitoring

Internal communication

External communication

Data collection, review of monitoring data (samples and levels) and compliant reviews leading to development of DWSP Excel risk spreadsheets

Engineering

Unacceptable Risk created?

AMP5 Programme

The next steps - DWSP Database

Database will provide a single systematic approach to DWSP’s.

Initial Requirements: To collate sample data from LIMS

– Risk score modified automatically as failures occur

– To provide audit trail for changes to plans / risks

– To produce risk characterisation based on trigger levels

– Reg 28 forms to be automatically produced

– Prompts review process

– Linked with GIS, Asset Management System, Lab systems, SCOPE, Maximo

WQ’s exact requirements to be finalised during the workshop with Mouchel on the 18th March 2010.

Enhancement of our Intranet Site

Aim of Enhancement of Intranet Site: To provide reliable and up-to-date water quality risk information to every department

within SEW.

� Water Quality– DWSP’s (initially Reg 28 forms)– Geographical representation of assets and WQ risk information– Up to date interpreted Water Quality data

� Customer Services– Water Supply Zone Data Summaries– To provide internal information on the science behind water

quality� Operational Risk Assessments for use in compiling Method Statements for

planned work.� Relevant Process Science Information� Relevant Laboratory Information

The Benefits of a Proactive Drinking Water Safety Plan:

� To safeguard water quality from catchment to consumer

� To ensure highest standards of drinking water supplied to all customers. Resulting in positive impact on consumer confidence in SEW’s supply area

� To minimise the risks of water quality failure aiming for excellent compliance figures, few incidents and as few as possible WQ complaints

� DWSP Database designed to manage and retrieve information which will facilitate a proactive approach to Water Quality

� DWSP’s become fully incorporated as ‘business as usual’.

� Collective ownership of finalised DWSP’s is the key to protecting WQ.