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Kotte Water Supply Scheme

OIC Kotte

WATER SAFETY PLAN (WSP)

Managing Drinking Water Quality from Catchment to Consumer

Prepared By

Water safety plan team Kotte

NATIONAL WATER SUPPLY AND DRAINAGE BOARD

Revision II

December 2019

Revision II

Contents

1. Introduction........................................................................................................................................1

1.1 Background.........................................................................................................................................2

1.2 Main Risks in the System.....................................................................................................................2

1.3 Objectives of the WSP Development..................................................................................................3

1.4 Key Reference Material for the WSP...................................................................................................3

1.4.1 Water Quality Standards.....................................................................................................................4

1.4.2 Hazard Analysis Critical Control Points Matrix....................................................................................4

1.4.3 Monitoring..........................................................................................................................................4

1.4.4 Management procedures....................................................................................................................4

1.4.5 A system of independent surveillance................................................................................................4

2. Water Safety Plan Team......................................................................................................................5

2.1 History of the team development.......................................................................................................5

2.2 WSP Teams, Roles of the Teams and Responsibility...........................................................................5

2.2.1 Assembling WSP Working team from NWS&DB.................................................................................5

2.2.2 Identification of Stakeholders for the WSP at Kotte WSS....................................................................8

2.2.3 Supporting team for the WSP.............................................................................................................9

2.2.4 Detail of Water Safety Plan Meetings schedule................................................................................10

3. System Description...........................................................................................................................11

3.1 General Information on the Supplier................................................................................................11

3.1.1 Vision of the Organization.................................................................................................................11

3.1.2 Mission of the Organization..............................................................................................................11

3.1.3 Principles and Values of the Organization.........................................................................................11

3.1.4 Functions of the Organization...........................................................................................................12

3.1.5 Goals of the Organization..................................................................................................................12

3.2 Kotte Water Distribution System......................................................................................................13

3.2.1 Zone 01 (Rajagiriya)...........................................................................................................................15

3.2.2 Zone 02 (Nawala)..............................................................................................................................15

3.2.3 Zone 03 (EthulKotte).........................................................................................................................15

3.2.4 Zone 04 (Pita Kotte)..........................................................................................................................16

3.2.5 Zone 05 (Mirihana)............................................................................................................................16

3.2.6 Zone 06 (Madiwela)..........................................................................................................................16

3.3 Valve details in Kotte Area................................................................................................................16

3.4 Flow Diagram....................................................................................................................................22

3.5 Intended user/users (Consumer)......................................................................................................23

3.6 Water Quality....................................................................................................................................26

3.7 Sample Location –AE Kotte...............................................................................................................28

3.7.1 Operational Monitoring....................................................................................................................28

3.7.2 Verification monitoring.....................................................................................................................33

3.7.3 Water Quality Analysis......................................................................................................................34

4. HAzard Identification and Assessment of Risks.................................................................................35

4.1 Risk Assessment Methodology..........................................................................................................35

4.2 Hazards Risk Table.............................................................................................................................38

5. Identifying Existing Controls and Reassess Risk with Controls..........................................................40

5.1 Risk prioritizing table.........................................................................................................................45

5.1.1 Distribution System...........................................................................................................................45

5.1.2 Consumer Interface...........................................................................................................................47

6. Identify and Develop Improvement Plan..........................................................................................48

7. Operation Monitoring and Corrective Actions..................................................................................52

8. Verification Procedure......................................................................................................................56

8.1 Compliance monitoring.....................................................................................................................57

8.2 Consumer Satisfaction......................................................................................................................58

9. Management Procedures..................................................................................................................59

10. Supporting Programme.....................................................................................................................61

11. Review of WSP..................................................................................................................................62

12. Incident Response Plan.....................................................................................................................65

13. Achievements....................................................................................................................................67

13.1 Rajagiriya Bridge Crossing.................................................................................................................67

13.2 Yakbedda Bridge Crossing Rajagiriya & Kolonnawa Ends..................................................................68

List of Tables

Table 1: WSP Operation Team.....................................................................................................6

Table 2: WSP Stakeholders' Identification...................................................................................8

Table 3: Supporting Team............................................................................................................9

Table 4 Distribution Pipe detail in Kotte area...........................................................................13

Table 5: No of connection as GND wise.....................................................................................18

Table 6 Consumer survey analysis report (Physical parameters)...............................................24

Table 7 Consumer survey analysis report (Water usage analysis).............................................24

Table 8 Water storage analysis..................................................................................................24

Table 9 Water storage cleaning process analysis......................................................................24

Table 10: Details of uses in Kotte Area.....................................................................................25

Table 11: Consumer Categorization of Kotte WSS.....................................................................25

Table 12: Standard for Water Quality – Physical Requirement.................................................26

Table 13: Standard for Water Quality – Biological Requirement...............................................26

Table 14: Standard for water quality: Chemical Requirement...................................................27

Table 15: RCL location point at operational monitoring............................................................28

Table 16: RCL location point at Verification monitoring...........................................................33

Table 17: Description of Likelihood or Frequency.....................................................................35

Table 18: Description of the Severity of the Consequences......................................................35

Table 19: Semi Quantitative Risk Matrix for Risk Assessment...................................................36

Table 20: Prioritizing Matrix......................................................................................................37

Table 21: Hazard / Risk Table....................................................................................................38

Table 22: Reassessment of Risk with Existing Controls..............................................................40

Table 23: Risk prioritizing table-Distribution system.................................................................45

Table 24: Risk prioritizing table- Consumer interface................................................................47

Table 25: Improvements to the Kotte WSP...............................................................................48

Table 26: Operation Monitoring and Corrective Actions...........................................................52

Table 27: Verification –Compliance monitoring........................................................................57

Table 28 : Verification – Consumer satisfaction........................................................................58

Table 29: Management Procedures..........................................................................................59

Table 30: Supporting Programme..............................................................................................61

Table 31: Review Schedule........................................................................................................62

Table 32: WSP auditing arrangement........................................................................................64

List of Figures

Figure 1 WSP Operation Committee............................................................................................5

Figure 2 Type of Distribution Pipe as percentages....................................................................13

Figure 3: Kotte area zonal map..................................................................................................14

Figure 4: Valve Detail.................................................................................................................16

Figure 5 GNDS –Area Engineer Kotte.........................................................................................17

Figure 6: Jubilee new reservoir..................................................................................................19

Figure 7: Jubilee Old Reservoir..................................................................................................19

Figure 8:Edirisinghe Water Tower.............................................................................................20

Figure 9: Moragasmulla water tower........................................................................................20

Figure 10: Pagoda Water tower.................................................................................................21

Figure 11:Madiwela Booster Pump house.................................................................................21

Figure 12: flow diagram.............................................................................................................22

Figure 13 :Trend curve for RCLConsumer end...........................................................................30

Figure 14: RCL Summery report at jubilee reservoir..................................................................31

Figure 15: Trend curve for RCL (Operational Monitoring).........................................................32

Figure 16: Trend curve for RCL..................................................................................................34

Figure 17: Planning Cycle...........................................................................................................65

Figure 18: Before & after WSP at Rajagriya bridge crossing......................................................67

Figure 19: Before & after WSP Yakbadda Bridge crossing Rajagiriya end..................................68

Figure 20: Before & after WSP Yakbaddabridge crossing Kolonnawa end.................................68

Figure 21 Before & after WSP consumer meter location..........................................................69

Figure 22 : Stakeholder meeting...............................................................................................69

List of Annex

Annex 01- Individual Responsibilities of WSP Operational Team

Annex 02- WSP Stakeholders Individual role & responsibilities

Annex 03 - WSP Supporting team Individual responsibilities in WSP team

Annex 04 - Meeting Calendar, Action Plan

Annex 05- Distribution network -Area engineer Kotte

Annex 06 - Valve location map

Annex 07- RCL Location point Map

Annex 08- Water Quality Analysis Report

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C:\\Users\\User\\Desktop\\final\\Annex\\Complete\\2.1 DISTRIBUTION NETWORK.pdf

REFERENCES

(n.d.). Guidlines for Drinking Water Quality.

(2019). MIS Report. Kotte: Manager Office.

(2017,2018). Sampath Pathikada. Kotte,Maharagama: M.C, U.C.

(2016)A practical guide to Auditing water safety plans(World Health Organization)

(2014)Urban Water Safety Planning capacity training-Participant Hand book

(2018)Water Safety Plan Internal Audit Report Kolonnawa

(2016)Water Safety Plan External Audit Report Panadura water supply Scheme

Abbreviations

ADB – Asian Development Bank

AE – Area Engineer

AGM – Assistant General Manager

CBO – Community Based Organization

CO – Commercial Officer

DGM – Deputy General Manager

DI – Ductile Iron

DS – Divisional Secretariat

EAP – Emergency Action Plan

EE – Electrical Engineer

GDP – Gross Domestic Product

GND – GramaNiladhari Division

MCM – Mega Cubic Metre

ME – Mechanical Engineer

Mn – Manganese

MOH – Medical Officer of Health

MSL – Mean Sea Level

n/a – Not Applicable

NGO – Non Government Organization

NWSDB/NWS&DB – National Water Supply & Drainage Board

O&M – Operation and Maintenance

OIC – Officer-in-Charge

PAC – Powder Activated Carbon

PE – Poly Ethylene

PHI – Public Health Inspector

PT – Plant Technician

PVC – Poly Vinyl Chloride

RCl – Residual Chlorine

RDA – Road Development Authority

RM – Regional Manager

RSC (S) – Regional Support Centre (Southern)

SLS – Sri Lanka Standard

SOP – Standard Operation Procedure

SOBE _ State Organization Business Enterprise

TOC – Total Organic Carbon

TP – Treatment Plant

UB –Unobjectionable

UDA – Urban Development Authority

UNICEF – United Nations International Children Emergency Fund

uPVC – un plasticized Poly Vinyl Chloride

WHO – World Health Organization

WSP – Water Safety Plan

WSS – Water Supply Scheme

WTP – Water Treatment Plant

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1. INTRODUCTION

Water is a challengeable natural resource for many countries and studies predicted that the

world will face water dilemma in 2025-2030, if not consumed in sustainable way. Moreover,

population growth, climate change, and industrialisation are critical factors that impact on the

water sector and ultimately result in freshwater shortage and continued water pollution.

There is no such thing as naturally pure water. In nature, all water contains some impurities.

As water flows in streams, sits in lakes, and filters through layers of soil and rock in the

ground, it dissolves or absorbs the substances that it touches. Some of these substances are

harmless. In fact, some people prefer mineral water precisely because minerals give it an

appealing taste. However, at certain levels, minerals, just like man-made chemicals, are

considered contaminants that can make water unpalatable or even unsafe.

Over one billion men, women and children all over the world do not have access to clean, safe

drinking water. Roughly two million people die each year of diarrhoea caused by infectious

water-borne diseases; roughly 70% are children (The 3rd United Nations World Water

Development Report: Water in a Changing World, 2009). Children's bodies aren't strong

enough to fight waterborne diseases.

Outbreaks of waterborne disease continue to occur in both developed and developing

countries, leading to loss of life, disease and economic burden for individuals and

communities (Davison, et al., 2005). It is a fact that access to safe water directly combines

with a nation’s social and economic development.

Over the past decade, sustainable access to water supply has emerged as one of the most

critical development challenges facing the developing world (Water Demand Management

Strategy and Implementation Plan, 2006). Sri Lanka is blessed with naturally reliable water

sources which keeps Sri Lanka at the level of the developed countries considering access to

the potable water. But still there exists the challenge of protecting and safe guarding the

reliability of the country’s water sources perspective of the quality of the raw water. Raw

water can be identified as rain water, surface water or ground water that has not subjected to

any of the treatment processes. The public investment on the infrastructure development

programme in Sri Lanka amounted to Rs. 407.5 billion (6.2 per cent of Gross Domestic

Product/GDP) in 2011 (Central Bank Annual Report, 2011). Hence, being a developing nation,

it is always better to focus on protecting raw water than treating it after been contaminated.

Not only the water supply but the water demand also arises rapidly in all over the world.

Population growth, rapid urbanization, and overall expansion in economic activities are major

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causal factors underlying such increases in water consumption. Urban and regional demand

for freshwater in Sri Lanka has grown significantly over the last decade (Hussain, Thrikawala, &

Barker, 2002). Hence it is very clear, National Water Supply & Drainage Board (NWSDB), as the

water supplier of the nation, challenges with the not only the supply of the safe, reliable

drinking water to the nation but also provide water in consistent, sufficient and desirable

quantity.

Therefore, the time has come to think about a holistic, systematic, and integrated

management approach used to identify and prioritize potential threats to water quality at

each step in a specific system’s water supply chain from catchment to consumer and

implement best practices to mitigate those threats and ensure drinking-water quality which is

in other words can be identified as the Water Safety Plan (WSP).World Health Organization

(WHO) promoting water safety plans as the most effective means of consistently ensuring the

safety of drinking water supply and it safe guard drinking water form catchment to consumer.

1.1 Background

Water Safety Plan (WSP) is the most effective way of ensuring access to the safe drinking

water in sufficient quantity provided that the word “safe” stands for the water that does not

contain harmful contaminants in concentrations that could make a person sick and the word

“sufficient” stands for the quantity of the water that is fair enough for the day to day activities

such as drinking, cooking and personal hygiene. Safe and sufficient drinking water prevents

the occurrence of waterborne diseases and directly contributes to any community’s social

development with sustainable family livelihood and hence the economic development of the

community. The WSP clearly a multiple barrier process but emphasizes on prevention. The

WSP helps to identify, prioritize and assess risks, that could threatened the reliability of the

water supply, and then to control and manage the identified risks, finally to monitor and verify

the procedures. As it is continuously being on operation, WSP is but a live process of managing

water quality from catchment to the consumer, not a prepared document. WSP is but a

continuous process, not an ending business.

1.2 Main Risks in the System

Industrial development and intensive agriculture are essential for development process. Since

many pollutants are added to water sources by the aforementioned development activities, a

lot of public money is invested to advanced water treatment processes and still prevails the

possibility of affecting to the health of the public. At present Sri Lanka is in a difficult situation

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to prevent source pollution by focusing point source pollution (eg: - industrial pollution) and

non-point source pollution (eg: - agricultural runoff).Some research studies show that present

heavy metals and persistent chemical concentration in water increasing day by day possibly

due to adverse agrochemical usage. Strengthening pollution prevention lows and legislations,

declaration of boundary protection zones and rendering legal power to water supplier for

involving in catchment protection are identified as helpful legislative approach to the

catchment protection. Further financing shall be ensured at the national level by introducing a

penalty scheme for polluters under “Polluter Pays” principle.

1.3 Objectives of the WSP Development

The objectives of a water safety plan are to ensure safe drinking-water through a better water

supply practice, that is:

To prevent water source contamination;

To treat water to reduce and/or remove contamination that could be present to the

extent necessary to meet the water quality targets; and

To prevent re-contamination during storage, distribution and handling of drinking

water.

The water supplier is the key player in a WSP but other stakeholders play their own significant

roles. As the principal water supplying authority in Sri Lanka, National Water Supply &

Drainage Board (NWSDB) bears the responsibility to implement Water Safety Plan for Water

Supply Schemes at their possession in the island. The objective of this document is to ensure

benefits of the WSP to the water consumers depending on Kotte Water Supply Scheme (WSS)

by implementing the WSP.

1.4 Key Reference Material for the WSP

The World Health Organization’s guide line for drinking water quality, aims to protect public

health. Adaption of WSP can be identified as the key approach to ensure this goal. WSP is the

most effective mean of consistently ensuring the safety of drinking water supply, through the

use of a comprehensive risk assessment and risk management approach that encompasses all

steps in water supply from catchment to consumer. This WSP is dynamic and practical.

WSP approach of WHO Guide Lines (2004) is a preventive management framework for safe

drinking water that consists with 11 learning modules.

3

1.4.1 Water Quality Standards

Sri Lanka Standard (SLS), health based targets (based on the evaluation of health

concerns)

1.4.2 Hazard Analysis Critical Control Points Matrix

System assessment to determine whether the water supply chain from catchment to

the point of consumption as a whole can deliver water of a quality that meets the

health based targets.

1.4.3 Monitoring

Monitoring of the control measures in the supply chain, which are of particular

importance in securing drinking water safety. (Monitoring Plan for monitoring of multi

barriers or control measures)

1.4.4 Management procedures

Documentation and communication the system assessment and monitoring describing

actions to be taken in normal operation and incident conditions including upgrade and

improvement plans through –Standard Operation Procedures (SOP), Incident

management plans, Preventive maintenance Programme, Rehabilitation and

improvement plans

1.4.5 A system of independent surveillance

Verifies that the above all are operating properly. (Water Quality Surveillance

Programme carried out by Health Department)

Water Supplier should get involved the stakeholders in the catchment to consumer of the

water supply system in preparation of the WSP.

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2. WATER SAFETY PLAN TEAM (MODULE 01)

2.1 History of the team development

Since the water safety plan deals with catchment to consumer approach of water safety,

NWS&DB along could not guarantee a proper implementation and execution of WSP. Hence

three teams were formed to coordinate with WSP development, monitoring and

implementation.

Hence, teams were assembled for the preparation of the WSP for Kotte Water Supply Scheme

(WSS).

2.2 WSP Teams, Roles of the Teams and Responsibility

Relevant officers of the NWS&DB were selected based on their field expertise for the

preparation, monitoring implementing and reviewing of the WSP for Kotte WSS.

2.2.1 Assembling WSP Working team from NWS&DB

According to the preliminary step of WHO Guideline, a team was assembled for the

preparation of WSP for Kotte WSS. Relevant officers of the NWSDB were selected considering

their field of expertise for the preparation and continuous monitoring of the performance and

carry out periodic review of the WSP.

5

Figure 1 WSP Operation Committee

Table 1: WSP Operation Team

No Name Section Designation Role of WSP

Contact Information

Reference(Responsibility)

01 Mr.AbeykoonBandara Manager Office, Kotte

Manager

(O&M)

Team Leader 0777633713 WSP/Kotte/

OIC/02

02 Mrs.M.L.R.K. Perera RSC .Western Central Senior Chemist Team

member 0718064184 WSP/Kotte/OIC/02

03 Mr.D.A.D.U.Nishantha A.E Office, Kotte

Area Engineer, Kotte

Deputy team leader

0714426642 WSP/Kotte/OIC/02

04 Mr.S.M.R.C.JayathilakaRSC Western Central

Priority Engineer Team member 0774098152 WSP/Kotte/

OIC/02

05 Mr.H.P.N. C. Siriwardana

Manager Office, Kotte

Development Engineer

Team member 0714870574 WSP/Kotte/

OIC/02

06 Mr.D.P.DeZoysa O.I.C Office, Kotte OIC (Kotte) Coordinat

or 0714437046 WSP/Kotte/OIC/02

07 Mr.D.S.R. Kolambaarachchi

O.I.C Office, Kotte

E.A. (Sp.) Civil Zone Officer. Rajagiriya


OIC/02

08 Ms.R.S. Kannangara O.I.C Office, Kotte

E.A.(Sp.) Civil Zone Officer,Ethul kotte

Secretary 0714444898 WSP/Kotte/OIC/02

09 Mr.T.K.Pathirana O.I.C Office, Kotte

E.A. Civil Zone Officer,Nawala


OIC/02

10 Mr.K.K.C. Jayawardana O.I.C Office, Kotte

E.A. Civil Zone Officer,Pitakotte


OIC/02

11 Mr.M.Y.Dhammika O.I.C Office, Kotte

E.A. Civil Zone Officer,Mirihana


OIC/02

12 Mr.H.M.C.Senevirathne O.I.C Office, Kotte

E.A. Civil Zone Officer,Madiwela Facilitator 711116346 WSP/Kotte/

OIC/02

No Name Section Designation Role of Contact Reference

6

WSP Information (Responsibility)

13 Ms.H.T. N. Jayawardana

AE office, Kotte E.A. Civil Team


14 Ms.B. A. Pathirathna AE office, Kotte E.A. Civil Team


15 Mr.D.A.S.Dematagoda Manager Office, Kotte E.A Mechanical Team


16 Mr.I.B.Dissanayaka Manager Office, Kotte E.A.Electrical Team


17 Mr.K.D.S.P. Jayweera O.I.C Office, Kotte

Meter Reader Inspector


OIC/02

18 W.S.N.De Silva O.I.C Office, Kotte

Management Assistant HR 0713472540 WSP/Kotte/

OIC/02

19 Ms.D.R. Thisera O.I.C Office, Kotte

Management Assistant

(Covering)


OIC/02

20 Mr.S.G.Sugath O.I.C Office, Kotte Meter Reader Media

Officer 0750458944WSP/Kotte/OIC/02

21 Mr. K.A. Indrajith O.I.C. Office, Kotte Store Keeper Team


22 Mr.N.Jayathissa O.I.C Office, Kotte Pipe Fitter Team

member 0721239587WSP/Kotte/OIC/02

23 Mr.U.I. Amarasinghe O.I.C. office,Kotte Driver Team


24 Mr.Pradeep Rangana O.I.C. office,Kotte Pump Operator Team


25 Mr. A.T.R Pathirana O.I.C. Office, Kotte Labour Team

Member 0754338205 WSP/Kotte/OIC/02

26 Mr. A.M. Vipulasena O.I.C.office , Kotte Labour Team

member 0711907956WSP/Kotte/OIC/02

Refer Annex 1 -Individual Responsibilities of WSP Operational Team

7

2.2.2 Identification of Stakeholders for the WSP at Kotte WSS.

Officers from other relevant organizations and stake holders were selected for the WSP team.

Table 2: WSP Stakeholders' Identification

Stakeholder's Organization

Job Title Contactperson

TelephoneNumber


01 Divisional Secretary Office Divisional Secretary

(Maharagama)Ms.W.Dilrukshi(Kotte)Mrs.Y.K.Shiromi Jeewamala.

0713848629

0714409103

WSP/Kotte/OIC/03/II

02 Police –Mirihana, Walikada Officer in Charge OIC Walikada

OIC Mirihana07185916500718591644

WSP/Kotte/OIC/03/II

03 Central Environmental Authority

Environmental Officer Kotte

Mr. K. P. Sanjeewa 0112862173 WSP/Kotte/OIC/03/II

04 Municipal Council Kotte Municipal Engineer Mr. Thiwahari 0777383528 WSP/Kotte/OIC/03/II

05Lanka Electricity Company Pvt. Ltd. Nugegoda

Electrical Engineer Mr. Nuwan Danapala 0112856380 WSP/Kotte/OIC/03/II

06 ConsumerMember of Community Police unit-Arunodaya mw.

K. A. Athula Premalal 0779441453 WSP/Kotte/OIC/03/II

07Medical Officer of Health(MOH) office- Kotte&Maharagama

MOH,

Kotte&Maharagama

PitakotteDelkanda

0112862973

0112852718WSP/Kotte/OIC/03/II

08 Sri Lanka TelecomRegional Telecom Office

Manager

Mr.

V.Weerasekara0711300312 WSP/Kotte/OIC/03/II

09Road Development Authority

Executive EngineerMrs.

T.D.Maheshani0714457192 WSP/Kotte/OIC/03/II

10

Provincial Road Development Authority (Mulleriyawa)

Executive Engineer Mrs.K.M.P.Fernan

do

0714393288 WSP/Kotte/OIC/03/II

11Provincial Road Development Authority (Moratuwa)

Executive EngineerMr.Lal

Jayaneththi0718192967 WSP/Kotte/OIC/03/II

12NWSDB Production,

Ambathale

Chief Engineer Mr. Rajapaksa0772984165 WSP/Kotte/OIC/03/II

13 NWSDB Sewarage. Area Engineer Mrs. Ganga de Alwis

0714870566 WSP/Kotte/OIC/03/II

Refer Annex 2- Individual role & responsibilities of WSP Stakeholders

8

2.2.3 Supporting team for the WSP

Supporting team was nominated to guide and to arrange necessary financial support and

higher management attention.

Table 3: Supporting Team

Name Designation Role within Team

Contact details


1 Eng. K.P.R.SSamarasinghe

DGM WC Team Leader 0777725294 WSP/Kotte/OIC/03/III

2 Eng.A.K.Kapuruge AGM O&M Team Member 0777891511 WSP/Kotte/OIC/03/III

3 Eng. T.Abewardene AGM develop Team Member 0777562373 WSP/Kotte/OIC/03/III

4 Mr.L.P.R.J. WijesingheAGM (Laboratory Service)

Team Member 0777250375 WSP/Kotte/OIC/03/III

5 Mrs. V.P.I.Jayawardana

Chief chemist Team Member 0718221968 WSP/Kotte/OIC/03/III

6 Eng. K. L. Edirisinghe NRW(AGM) Team Member 0777717652 WSP/Kotte/OIC/03/III

7 Eng.G.G. R. Chandani CE coordination Team Member 0718478135 WSP/Kotte/OIC/03/III

8 Eng.G.A. Dinesh Chief Eng. E&M Team Member 0714418337 WSP/Kotte/OIC/03/III

9 Ms.Shiromi Karunathilaka

Se.Public R. O. Team Member 0773044933 WSP/Kotte/OIC/03/III

10 Mr.Nalin Paranawithana

Training Officer Team Member 0714470714 WSP/Kotte/OIC/03/III

Annex 3 - Individual role & responsibilities of WSP Supporting team

9

Meeting Frequency Meeting minutes(Reference)

Calendar(Reference)

01 Operational Team Meeting Once per month (WSP/KOTTE/OIC/01/I)

WSP/KOTTE/OIC/01/IAnnex 04

02 Supporting Team Meeting Once per 3 month (WSP/KOTTE/OIC/01/I)

03 Stakeholders Team Meeting Once per year (WSP/KOTTE/OIC/01/I)

04 Other Special Meeting As per requirement (WSP/KOTTE/OIC/01/I)

05 WSP progress meetings with manager Once per month

Progress meeting minutes(Kotte Region)

2.2.4 Detail of Water Safety Plan Meetings schedule

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3. SYSTEM DESCRIPTION (MODULE 02)

3.1 General Information on the Supplier

National Water Supply & Drainage Board has its beginning as a sub department under the

Public Works Department with responsibility for the water supply and drainage system of Sri

Lanka. From 1965, it functioned as a division under various ministries until January 1975 when

it was converted to Statutory Board by an Act of Parliament. Hence now, the National Water

Supply & Drainage Board is a statutory board established under National Water Supply &

Drainage Board Act No. 2 of 1974. An addendum was introduced to the initial act by the

National Water Supply & Drainage Board Amendment Act No. 13 of 1992.

Around 80% of the population has access to the safe drinking water of which 30% (in 2010) is

through piped water supply system of the NWSDB. National Water Supply & Drainage Board

being the principal water supplying authority in Sri Lanka has a responsibility to supply water

to meet the social aspiration of the people in terms of safety, reliability and effectively. Safe

drinking water access is a one of the most important criteria in millennium development goals.

Often in Sri Lankan drinking water supply was developed focusing the quantity or the

treatment than the catchment protection or the consumer side water safety.

3.1.1 Vision of the Organization

To be the most prestigious utility organization in Sri Lanka through technological and service

excellence.

3.1.2 Mission of the Organization

Serve the nation by providing sustainable water and sanitation solutions ensuring total user

satisfaction.

3.1.3 Principles and Values of the Organization

Commitment to total customer needs

Motivation of staff towards creativity to achieve organizational objectives

Maintain Ethics and Professionalism in all activities

Facilitate for Prevention of Environmental Degradation

Positive contribution to National Economic Growth respecting Government Policy

initiatives

Work as a Team with Honesty, Integrity and Transparency

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3.1.4 Functions of the Organization

Primary Functions

o Identification of the “unserved”, especially those prone to health problemso Preliminary Investigations, Planning, Design and Construction of Water Supply ando Sewerage Projects with local funds and donor assistance. Study all possible

options & carry out feasibility studies, Comprehensive analysis (including social economic impact, environmental impact, health aspects, etc.) cost estimation & Environmental Impact Assessment of such projects

o Operation and maintenance of Water Supply and Sewerage Schemes to provide satisfactory service to customers

o Billing and Collection through affordable tariff setting

Secondary Functions

o Human Resource Planning and Developmento Research & Development for service improvement utilizing innovative techniqueso Budgeting and Financial Controlo Publicity and Consumer awareness programs on effective use of water and

reduction of non-revenue watero Corporate Planning and Strategic Managemento Laboratory Services for quality monitoring and controlo Overall responsibility to monitor the drinking water quality of the people of the

country and to provide Technical Assistance to Community Based Organizations, Local Authorities, State Agencies and Private/ Public Sector Institutions on their water supply and sanitation facilities.

o Consultancy Services on water supply & sanitationo Project formulation and Managemento Coordination with sector actors and stakeholderso Information Management

3.1.5 Goals of the Organization

Goal 1 - Increase the water supply and sanitation coverage

Goal 2 - Improve Business Efficiency

Goal 3 - Improve greater accountability & transparency.

Goal 4- Ensure safe drinking water supply and sanitation to rural and underserved

communities

12

3.2 Kotte Water Distribution System

The average daily water demand is 37600 cum. Total No of Population 177866 (Sampath

Pathikada 2017).There are three elevated towers named as

Moragasmulla(2000cum),Edirisinghe Road(2000cum) and Pagoda(1500cum). Ground

reservoirs called Jubilee New and Jubilee old capacities are 11250cum and 4500cum. water.

Distribution system is approximately 371km.

Table 4 Distribution Pipe detail in Kotte area

Figure 2 Type of Distribution Pipe as percentages

There are some areas low pressure due to lack of water. (Moragasmulla,

Rajagiriya,Nawala).Total affected no of connections are 15000. It has 50290 connections and

water coverage is 98%.The total area divided into six zones as below.

Refer annex 5- Distribution network -Area engineer Kotte

13

PVC74%

Cact Iron21%

Ductile Iron3%

Galvanize Iron1%

Type Length (Km)

PVC. 276.3

Cast Iron 80

Ductile Iron 13

Galvanize Iron 4

Total Length 373.3

D:\\office\\WSP Final Report june 2019\\ANNEX 05-Kotte WSP DIS F OIC.pdf

Figure 3: Kotte area zonal map

14

3.2.1 Zone 01 (Rajagiriya)

Zone is directly fed from Kolonnawa WSS

No of service connections -10016

Distribution lines are under the road carriage way

More time taken for leak repairing

Apply 4 hr water interruption daily due to lack of water and available some

low pressure areas.

Majority of the customers not collected the water in the storage tank

Water quality monitoring of the system is done once a week

Population density is very high

3.2.2 Zone 02 (Nawala)

Water received to system from both Kolonnawa and Kotte WSS

No of service connections - 7983

Majority of the customers collected the water in the storage tank

Water quality monitoring of the system is done once a week

Apply 4hr water interruption daily due to lack of water and available low

pressure areas.

3.2.3 Zone 03 (EthulKotte)

Water supplied to system from Kotte WSS


Above 1 bar pressure is maintained in the system


Distribution system is under the road carriage way.

Water quality monitoring of the system is done once a week.

15

3.2.4 Zone 04 (Pita Kotte)

Water supplied to system for Kotte WSS


Population density is high

Above 1 bar pressure is maintained in the system


3.2.5 Zone 05 (Mirihana)


No of service connections - 8381


Low pressure area due to cast iron pipe lines and smaller diameters.


3.2.6 Zone 06 (Madiwela)




Low pressure area due to higher elevation.

Majority of the customers are not collected the water in the storage tank

3.3 Valve details in Kotte Area

Figure 4: Valve Detail

Valve Total NoCritical no of

valveReference

Main Sluice Valve 257 30 WSP/KOTTE/OIC/PMP/M1 Annex 06

Fire Hydrant Valve 6 6

WSP/KOTTE/OIC/PMP/M2 Annex 06Air Valve 12 12

Washout Valve 14 14

Total 289 62

16

All of these valves are servicing as the Preventive maintenance programme.

(WSP/KOTTE/OIC/PMP)

Figure 5 GNDS –Area Engineer Kotte

17

Table 5: No of connection as GND wise

DS DIVISION

GND No GND NAME NO. OF CONNECTION

POPULATION

Mah

arag

ama

1 523 Mirihana North 2002 6458

2 523A Mirihana South 1928 6760

3 524 Madiwela 1828 6225

4 524A Pragathipura 1693 6056

5 525 Thalapathpitiya 1882 6543

6 525A Udahamulla East 1840 6620

7 525B Udahamulla West 1426 4958

8 526B Gangodawila South 1510 4947

9 526C Wijerama 825 3217

10 526D Jambugasmulla 1401 4862

11 527 Nawinna 1635 1170

Sri

Jaya

war

dena

pura

Kotte

12 514 Walikada East 1960 8022

13 514A Walikada West 1969 7420

14 514B Rajagiriya 1068 4333

15 514B Obeyasekarapura 2157 12501

16 514D Walikada North 1660 5085

17 519 Nugegoda 1220 5543

18 519A Pagoda 1773 5673

19 519B Nugegoda West 1520 5861

20 519C Pagoda East 1675 6540

21 520 Nawala West 1301 4306

22 520A Koswatta 2010 6963

23 520B Nawala East 1710 5740

24 521 EthulKotte 2016 6339

25 521A EthulKotte West 1124 3603

26 522 PitaKotte West 1699 5603

27 522A PitaKotte East 1493 4115

28 522B PitaKotte 1105 4650

29 526 Gangodawila North 1610 6097

30 526A Gangodawila South 2231 4947

31 526C Gangodawila East 1019 3484

Total 50290 174641

18

Figure 6: Jubilee new reservoir

Figure 7: Jubilee Old Reservoir

19

CAPACITY- 11325CUM

T W L - 36.57 MSL

B W L - 27.43 MSL

CONSTRUCTED ON - 1992

WASHOUT - FUNCTION

LEVEL INDICATOR - FUNCTION

STRUCTURE - CONCRETE

OVERFLOW -FUNCTION

INLET - FUNCTION

OUTLET -FUNCTION

FLOW METER -FUNCTION

RESPONSIBILITY-OIC

CAPACITY - 4530 CUM

T W L- 36.57 MSL

B W L -27.43 MSL


WASHOUT - FUNCTION

LEVEL INDICATOR - FUNCTION


OVERFLOW - FUNCTION

INLET - FUNCTION

OUTLET - FUNCTION

FLOW METER – FUNCTION

RESPONSIBILITY- OIC

Figure 8: Edirisinghe Water Tower

Figure 9: Moragasmulla water tower

20

CAPACITY - 2000CUM

T W L - 36.57 MSL

B W L - 27.43 MSL


WASHOUT - FUNCTION

LEVEL INDICATOR- FUNCTION


OVERFLOW -FUNCTION

INLET - FUNCTION

OUTLET - FUNCTION

FLOW METER - AVAILABLE

RESPONSIBILITY-ZONE OFFICER

CAPACITY -1500CUM

T W L - 35.66 MSL

B W L - 28.48 MSL


WASHOUT - FUNCTION

LEVEL INDICATOR- FUNCTION


OVERFLOW -FUNCTION

INLET - FUNCTION

OUTLET - FUNCTION

FLOW METER –NOT FUNCTION

RESPONSIBILITY – ZONE OFFICER

Figure 10: Pagoda Water tower

Figure 11:Madiwela Booster Pump house

CAPACITY - 108M3 /H

HEAD - 26M

TOTAL COST -25MILLION


RESPONSIBILITY-OIC

21

CAPACITY - 2000CUM

T W L - 38.7 MSL

B W L - 31.4 MSL


RESPONSIBILITY - AE

ABANDANT WATER

TOWER

USED AS RECORD ROOM

AND AUDITORIUM

Edirisighe rd. Pumps210m3/h

3.4 Flow Diagram

Figure 12: flow diagram

22

Mah

arag

ama

WSS

900m

3/h

Jubilee pumps1200m3/h

Colo

mbo

W

SS22

00m

3/h

Edirisinghe tower

Gravity main450m3/h

Jubilee Reservoir

Ambathale WTP

Kolonnawa reservoir

Distribution system

Distribution system

Distribution system

Gravity main (Baddagana)110m3/h

Distribution system

Moragasmulla tower

Madiwela B.Pumps108m3/h

Distribution MainTransmission Main Pumps750m3/h

Kolonnawa Reservoir

Transmission Main

Transmission Main

Legend

Transport step Storage step Combined step

Operation

step

3.5 Intended user/users (Consumer)

Since this WSP discusses catchment to consumer approach of water safety, it is essential to

follow best practices from the consumer interface to ensure the water quality at the point of

consumption.

Improved water supply for domestic use brings about several benefits to water users including

prevention water borne diseases, saving of time spent on water fetching and storage,

maintaining clean and domestic environment and enhanced convenience. Similarly, better

sanitation results in prevention of water borne and water related diseases through safe

disposal of human waste and clean living environment. As people enjoy healthy living, they

can save time and energy that was spent on arduous water fetching, and be engaged in

economically beneficial activities and management of household affairs such as caring for

children.

Domestic consumers of Kotte WSS use water mainly for drinking, preparation of foods,

personal hygiene, washing of clothes, domestic livestock. Non-domestic consumers use water

for their business purposes in addition to the uses of water by the domestic consumers.

It is necessary to keep attention for the hospitals which are located in Kotte area.

Consumption of Sri Jayawardanapura Hospital is 36000m3 /month. They use water for drink,

cooking, A/C machine laundry, Theaters and personal hygiene purpose. Also special attention

to be delivered to the major consumers as Navi Camp 7500 m3/month ,Madiwala M P

quarters2500 m3/month&2000 plaza building2000 m3/month etc. They use water for

drinking, washing, laundry, personal hygiene & vehicle washing purpose. Further schools in

weekdays, religious places in important religious festival days (eg: - temples in Poya Days) shall

be identified as critical places where special attention is required periodically.

We have done a consumer survey under the OIC Kotte area. It has done by through the zone

officers and covered all the 6 zones. Data were analyzed by the WSP team and the results are

shown as below. The data has been included in Consumer Survey analysis report

(WSP/KOTTE/OIC/04)

23

Table 6 Consumer survey analysis report (Physical parameters)

Parameter Bad Not bad Good Very Good

Taste 2% 5% 73% 20%

Colour 2% 7% 73% 18%

Odor 1% 5% 73% 21%

Turbidity 2% 5% 71% 22%

Table 7 Consumer survey analysis report (Water usage analysis)

Description Percentage

Direct water use 54%

Boil water use 29%

Filter use 11%

Bottle water use 6%

Table 8 Water storage analysis

Description Percentage

Overhead tank only 35%

Sump & Overhead tank 13%

Use direct tap 52%

Table 9 Water storage cleaning process analysis

Monthly Once in 3 month

Once in 6 month Once in year Over one

yearWater storage cleaning (Percentage)

5% 12% 12% 20% 51%

It has given special attention to the Sri Jayewardene Hospital & taken their observation with in

the consumer survey. Hospital requirement has been satisfied with water board standards

(Standard (SLS) 2013: 614).Thus there are no differences between water board requirement &

24

the hospital requirement. However the location of the hospital included in the sample testing

point.

Table 10: Details of uses in Kotte Area

Consumer Category

No of Connecti

onsIntended Uses

Domestic 44560 Drinking, Washing, Sanitary purpose, Bathing,Laundry,Food processing

Commercial 5123 Drinking, Washing, Laundry, Food processing, manufacturing

Schools 32 Drinking, Washing, Gardening

Government Institution 32 Drinking, Washing, Bathing, Food processing, Gardening

Religious 124 Drinking, Washing, Bathing, Food processing

Tourist / Guest Houses 1 Washing, Bathing, Food processing

Hospitals 2 Drinking, Washing, Mechanical Plants, Laundry

Army Camps 2 Drinking, Washing, Bathing, Food processing, Gardening

Table 11: Consumer Categorization of Kotte WSS

Category No Customer Category No of Connections10 Domestic 4459111 Board Quarters 812 Schools 3013 Govt Quarters 14114 Tenaman Garden 1515 Assisted Schools 218 Condominium 1220 Domestic Samurdhi 2451 Stand Posts 960 Govt Institution 3261 Army 262 Police 565 SOBE 8463 Hospital 270 Commercial Institutes 516971 Tourist/Guest 180 Other Comm and Priv. 1781 Religious 12482 NWSDB premises 1185 Other non-Profit Organizations 10

25

90 Bulk 1Total 50290

3.6 Water Quality

The national targets for provision of water supply and sanitation had been prepared and

revised from time to time since planning stage of International Water Supply and Sanitation

Decade. All the WSSs operate under NWSDB including Kotte WSS follows the Sri Lanka

Standard (SLS) 2013: 614 Part 1 and Part 2. Further NWSDB is interested to comply with WHO

Water Quality Standard and American Standard for Drinking Water and NWSDB’s focus is to

follow the limits whichever the lowest.

Table 12: Standard for Water Quality – Physical Requirement

Item Characteristic Requirement Target Method of Test

1 Colour 15 15 APHA 2120 B

2 Odor Unobjectionable - Sensory

evaluation

3 Taste Unobjectionable - Sensory

evaluation

4 Turbidity 2 NTU 0.5NTU APHA 2310 B

5 pH 6.5 – 8.5 6.5-8.5 APHA 4500- H B

Table 13: Standard for Water Quality – Biological Requirement

Item Characteristic

Requirement

(nos /100ml)

(Max.Allow.)

Target value Method of Test

1 E- Coli 0 0Multiple tube

method

2 Coliform 3 0Multiple tube

method

26

Table 14: Standard for water quality: Chemical Requirement

Item CharacteristicRequirement (mg/l)

Max.Target value Method of Test

1 Chloride (as Cl) 250 - APHA 4500 – Cl B

2Free residual Chlorine

(as Cl)Rcl1.0 0.2 min APHA 4500 – Cl G

3Alkalinity (total as

CaCO3)200 - APHA 2320 – B

4 Free Ammonia 0.06 - -

5 Albuminoidal Ammonia 0.15 - -

6 Nitrate (as NO3) 50 -ALHA 4500 – NO3

E

7 Nitrite (as NO2) 3 -ALHA 4500 – NO3

B

8 Fluoride 1 - APHA 4500 – F C

9 Total Phosphate 2 - APHA 4500 – P C

10 Total Dissolved Solids 500 - APHA 2540 – C

11 Total Hardness 250 - APHA 2340 – C

12 Total Iron 0.3 - APHA 3500 – Fe B

13 Sulphate 250 -APHA 4500 – SO4

E

14 Oil and Grease 0.2 - APHA 5520 B

15 Calcium 100 - APHA 3500 – Ca B

16 Magnesium 30 -APHA 3500 – Mg

B

17 Sodium 200 - APHA 3111B

18 Manganese 0.1 - APHA 3111B

27

3.7 Sample Location –AE Kotte

3.7.1 Operational Monitoring

The water quality is tested weekly under AE Kotte by Zone officers. (Operational Monitoring)

Refer annex 7-RCL Location point Map

Table 15: RCL location point at operational monitoring

Operational Monitoring

Source Tested by No RCL Location Points Reference

Kolonnawa

reservoirzone officer

1 No. 68/C New Kolonnawa Rd,Obeysekarapura

WSP/

KOTTE/OIC/05

2 No. 111/1 Buthgamuwa Rd, Rajagiriya

3 No.04, Bandaranayakapura, Rajagiriya

4 No.18, 4th Lane,Nawala,Koswatta

5 No. 15/3, Nuwarawatta Rd, Nawala

6 No. 129/1, Temple Rd, Nawala

Jubili

reservoir zone officer

7 No.31, D M Colombage Mw,Nawala

8 No.51/12 C, Ananda Balika Mw,Pagoda Rd

9 No. 171, Thlawathugoda rd,Pitakotte

10 No.148, Epitamulla Rd, EthulKotte

11 No.105, Ferry Rd,Ethulk kotte

12 No. 204, Duwa Rd,Beddagana

13 No. E 16, MP Quarters, Madiwela

14 Buddha Mandiraya,Pragathipura Junction

15 No.100/10,Kurunda mw,Thalpthpitiya

16 No. 58/48 B,3rd Lane, Somathalagal mw

17 No.14/3 B, Station Lane,Udahamulla

18 No.366, High Level Rd,Gangodawila

Jubili Reservoir outlet

Pump operator

Pump house outside tap

28

D:\\office\\WSP Final Report june 2019\\ANNEX 07-OIC Kotte WSP RCL.pdf

Figure 13 : Trend curve for RCL Consumer end

January Febuary March April May June0

0.10.20.30.40.50.60.70.8

Water Quality analysis(RCL) Report(Consumer end)2019Tested by:OIC Kotte

RCL(

mg/

l)

29

Figure 14: RCL Summery report at jubilee reservoir

30

Figure 15: Trend curve for RCL (Operational Monitoring)

January February March April May June0.00

0.20

0.40

0.60

0.80

1.00

1.20

Water Quality (RCL)Analysis Report(Jubili Resovoir Outlet)2019(Tested by-OIC Kotte)

RCL(

mg/

l)

31

3.7.2 Verification monitoring

The water quality is tested weekly under Ambathale production unit (Verification Monitoring)

Table 16: RCL location point at Verification monitoring

Verification Monitoring

Source Tested by No RCL Location Points Reference

Jubili

reservoir

Ambathale Production unit

1 "ApiWenuwenApi" Hotel, Kimbulwala junction,

Kotte.

WSP/

KOTTE/OIC/05

2 H/H outside tap at No. 536 A, Kongahawatta Road,

Thalawathugoda.

3 H/H outside tap at Refresh Saloon , Athul Kotte

4 Car wash center, Old kottawa Rd, Kotte.

5 Jubili Reservoir

6 Hospital outside tap at Base Hospital,

Jayawardanapura

32

3.7.3 Water Quality Analysis

Water quality analysis for chemical requirement

Figure 16: Trend curve for RCL

January Feburay March April May June0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

WaterQuality (RCL)Analysis Report-2019 (Consumer end)(Tested by -Ambathale Production unit)

RCL(

mg/

l)

Refer annex 8-Water quality analysis report

33

D:\\office\\WSP Final Report june 2019\\ANNEX 08.pdf

4. HAZARD IDENTIFICATION AND ASSESSMENT OF RISKS (MODULE 03)

A biological, chemical, physical and/or radiological agents in, or condition of water, with the

potential to cause adverse health effect is a hazard. Another word for hazard includes

“contaminants”.

Hazard identification from catchment to the consumer was done and the analysis of risk was

performed with using a semi-quantitative risk matrix. For the matrix frequency of the

identified hazard event and the severity caused by the particular hazard event were taken into

account.

4.1 Risk Assessment Methodology

Semi Quantitative Risk Matrix was developed by frequency of occurring of the particular

hazard event and the severity of the particular hazard event was measured considering the

following guideline.

Table 17: Description of Likelihood or Frequency

Risk Score Likelihood Descriptions

1 Rare Once every 5 years

2 Unlikely Once per year

3 Moderately likely Once per month

4 Likely Once per week

5 Almost certain Once per day

Table 18: Description of the Severity of the Consequences

Risk Score Severity/Consequence Descriptions

1 Insignificant No impact or not detectable

2 Minor Potentially harmful to small population

3 Moderate Potentially harmful to large population

4 Major Potentially lethal to small population

5 Catastrophic Potentially lethal to large population

Based on the frequency index and the severity index of a particular hazard event the risk score

of the event was calculated and the risk rates are as follows;

34

Table 19: Semi Quantitative Risk Matrix for Risk Assessment

Severity or ConsequenceLi

kelih

ood

or F

requ

ency

InsignificantNo impact or not

detectable(1)

MinorPotentially harmful

to small population(2)

ModeratePotentially harmful to large population (3)

MajorPotentially lethal to small population (4)

CatastrophicPotentially lethal to large population(5)

Almost certainOnce per day(5) Low (5) Moderate(10) High(15) High(20) High(25)

LikelyOnce per week(4) Low(4) Moderate (8) High(12) High(16) High (20)

ModerateOnce per month(3) Low(3) Moderate (6) Moderate (9) High(12) High(15)

UnlikelyOnce per year(2) Low (2) Low(4) Moderate (6) Moderate (8) Moderate (10)

RareOnce every five years(1) Low (1) Low (2) Low (3) Low(4) Low(5)

Risk score < 6 6 - 12 12<

Risk rating Low Moderate HighDepending on the risk rating the actions that are to be performed were categorized as follows;

35

Table 20: Prioritizing Matrix

Risk Rating Action

Low risk Manage by routine procedures, keep under review.

Moderate risk

management responsibility must be specifies

Less priority action required; or

Action required, plan and prepare.

High management attention needed

Priority action required to mitigate hazard in short term.

36

4.2 Hazards Risk Table

Table 21 Hazard / Risk Table.

(Refer for Hazard table WSP/KOTTE/OIC/03/IV)

No. Component Hazard Event Hazard Type

Like

lihoo

d

Seve

rity

Row Risk Rating

KD-01 Distribution

Contamination enters into pipe network due to frequent unidentified invisible pipe leakages& pipe burst. Thalapathpitiya Temple Rd

Physical, Chemical, Biologic

4 3 12High

KD-02 Distribution

Contamination enters into pipe network due to unhygienic repair procedure due to high ground water level. Arunodaya mw.

Physical, Chemical, Biological

5 3 15High

KD-03 Distribution

Contamination enters into pipe network due to low pressure in the system. Obeysekarapura,Arunodaya mw, U.E.Perera Mw.

Physical, Chemic al, Biological 5 3 15

High

KD-04 DistributionContamination enters in to pipe lines due to improper valve operationsduring leak repairing.


3 2 6Moderate

KD-05 Distribution

High turbidity water stagnates in pipe network due to low flow velocity in pipe network (dead ends).Mahawatta Road,ThalapathpitiyaKanatta Road.Papiliyana Rd

Physical,Chemical,Biological

4 3 12High

KD-06 Distribution

Contamination enters into pipe network due to scaling in old Cast Iron pipes.Edirisinghe Road,Pangiriwatta Road

Physical, ChemicalBiological

3 3 9Moderate

KD-07 Distribution

Turbidity increase in the pipe system due to intermittent water supplyMoragasmulla,Rajagiriya,Nawala.15000 connection

Physical, ChemicalBiological

4 3 12High

KD-08 DistributionContamination enters in to pipe network system due to illegal tapping or unauthorized water connection.


3 3 9Moderate

KD-09 Distribution

Sewer Contamination enters into network pipe due to close laying of sewerage lines.Mirihana Rd,Maddumagewatta,Hospital-Thalapathpitiya


2 5 10Moderate

37

No. Component Hazard Event Hazard Type

Like

lihoo

d

Seve

rity Row

RiskRating

KD-10 Ground Reservoir

Turbidity and color increasing due to poor maintenance procedures of service reservoirs.Jubili old reservoirJubili new reservoir


3 3 9Moderate

KD-11 Ground Reservoir

Contamination enters to the Reservoir water due to penetration of rain water & other impurities through reservoir top


3 4 12High

KD-12 Water Tower

Contamination enters to the elevated water towers due to uncovered openings (Access by animals / birds through the unscreened vents.)


3 3 9Moderate

KC-01 Consumer Interface

Contamination enters in to the consumer overhead tank due to vulnerable to access by birds/animals


3 2 6Moderate


Contamination enters to the underground sumps due to lack of maintenance, unprotected openings & poor construction (Especially small scale restaurant).


4 3 12High


Contamination enters into network pipe due to poor plumbing practices & materials.(not suitable for portable water)


2 3 6Moderate


Contamination enters in to network system due to backflow from residential commercial & industrial service lines during low pressure in the system.


3 3 9Moderate

38

5. IDENTIFYING EXISTING CONTROLS AND REASSESS RISK WITH CONTROLS (MODULE 04)

Identified risk were reassessed with the existing control measures taken to preventing, removing, inactivating and maintaining of particular hazard event.

Table 22: Reassessment of Risk with Existing Controls

No

Proc

ess S

tep

Haza

rdou

s Eve

nt

Haza

rd T

ype

Risk if there was no controls

BASI

S (R

easo

ns fo

r Se

lecti

on o

f Li

kelih

ood

and

Cons

eque

nce

Scor

es)

Existi

ng C

ontr

ol

Mea

sure

s

If th

is co

ntro

l m

easu

re e

ffecti

ve Risk with existingControls

Impr

ovem

ent P

lan

No

Like

lihoo

d

Cons

eque

nce Ri

sk R

ating

Risk

Ban

d

Like

lihoo

d

Cons

eque

nce Ri

sk R

ating

Risk

Ban

d

KD1

Dist

ributi

on

Contamination enters into pipe network due to frequent unidentified invisible pipe leakages & pipe burst.Thalapathpitiya Temple Rd

B,C,P

4 3 12 H Consumer Complain

.Flushing the line after repairing the leak.Fixing of air Valves.Identify the leak from LD Gang &immediately repair the leak.

yes 3 3 9 M KD1/IP1

KD2

Contamination enters into pipe network due to unhygienic repair procedure due to high ground water level.Arunodaya mw.

B,C,P

5 3 15 H Consumer complain

.Dewatering the pipe trench before repair..Flushing the line.Awareness programme for accurate repair method.

Yes 3 2 6 M

KD2/IP1

KD2/IP2

KD3

Contamination enters into pipe network due to low pressure in the system.Obeysekarapura.Arunodaya mw.U.E.Perera mw.

B,C,P

5 3 15 HInformation

from the public

.Immediately attend to repair leak in low pressure area..Raising & shifting the water meters which are below the ground level.(specially toilet areas& near garbage)

Yes 4 2 8 M

KD3/IP1

KD3/IP2

39

No

Proc

ess S

tep

Haza

rdou

s Eve

nt

Haza

rd T

ype


BASI

S (R

easo

ns fo

r Se

lecti

on o

f Lik

elih

ood

and

Cons

eque

nce

Scor

es)

Existi

ng C

ontr

ol M

easu

res

If th

is co

ntro

l mea

sure

eff

ectiv

e

Risk with existing Controls

Impr

ovem

ent P

lan

No

Like

lihoo

d

Cons

eque

nce

Risk

Rati

ng

Risk

Ban

d

Like

lihoo

d

Cons

eque

nce

Risk

Rati

ng

Risk

Ban

d

KD4

Dist

ributi

on

Contamination enters in to pipe lines due to improper valve operations during leak repairing.

B,C,P

3 2 6 MField visit & consumer complain

.Valve operation is done according to the SOP..Awareness programme.

Yes 2 2 4 L

KD5


P, B 4 3 12 H

Field visit &Consumer complain

.Flushing the pipe lines according to the Preventive maintenance programme . .Fixing washout valve.

Yes 3 3 9 M

KD5/IP1

KD5/IP2

KD5/IP3

KD6

Contamination enters into pipe network due toscaling in old Cast Iron pipes.Edirisinghe Road,Pangiriwatta Road

P, C 4 3 12 H

Field visit & consumer complain

.Descaling cast iron pipe

.Flushing the pipe lines according to the Preventive maintenance programme .

Yes 3 3 9 M

KD6/IP1

KD6/IP2

KD6/IP3

No

Proc

e

Haza

rdo

us

Even

t Risk if there was no controls BA

SIS

(Rea

son

s fo

r Ex

isting

Co

ntr

ol

Mea

sur

es

If th

is Risk with existing Controls Im

pro

vem

ent

Pl

an

40

Like

lihoo

d

Cons

eque

nce

Risk

Rati

ng

Risk

Ban

d

Like

lihoo

d

Cons

eque

nce

Risk

Rati

ng

Risk

Ban

d

KD7

Dist

ributi

on Turbidity increase in the pipe system due to intermittent water supplyMoragasmulla,Rajagiriya,Nawala.15000 connection

P,C 4 3 12 HField visit & consumer complain

.Flushing the pipe lines according to the Preventive maintenance programme

Yes 3 3 9 M KD7/IP1

KD8

Contamination enters in to pipe network system due to illegal tapping or unauthorized water connection.

P,C,B 3 3 9 M

Field visit & consumer complain

.Inspection of illegal connection Yes 3 2 6 M KD8/IP1

KD9

Sewer Contamination enters into network pipe due to close laying of sewerage lines.Mirihana Rd,MaddumagewattaHospital-Thalapathpitiya

B,C,P

2 5 10 MField visit & Consumer complain

.Fix Identification tape in sewer lines..Proper planning at planning stage..When there is a leak immediately contact the relevant officer in sewerage

Yes 2 4 8 M KD9/IP1

41

No

Proc

ess S

tep

Haza

rdou

s Eve

nt

Haza

rd T

ype


BASI

S (R

easo

ns fo

r Sel

ectio

n of

Like

lihoo

d an

d Co

nseq

uenc

e Sc

ores

)

Existi

ng C

ontr

ol M

easu

res

If th

is co

ntro

l mea

sure

eff

ectiv

e

Risk with existing Controls

Impr

ovem

ent P

lan

No

Like

lihoo

d

Cons

eque

nce

Risk

Rati

ng

Risk

Ban

d

Like

lihoo

d

Cons

eque

nce

Risk

Rati

ng

Risk

Ban

d

KD10

Rese

rvoi

r

Turbidity and color increasing due to poor maintenance procedures of service reservoirsJubili old reservoirJubili new reservoir

PC, B 3 3 9 M

.Consumer complain.O&M Report

.Clean the reservoir once in two years Yes 2 3 6 M KD10/IP1

KD11


P,C, B 3 4 12 H .O&M Report

.Clean the debris at top of the reservoir. Yes 3 3 9 M KD11/IP1

KD12

Tow

er


P,C,B 3 3 9 M

.Consumer complain

.O&M Report

.Covered the openings by screen mesh Yes 1 1 1 L

No

Proc

e

Haza

rdo

us

Even

t

Haza

rd Risk if there was no

controls BASI

S (R

eas

ons

Existi

ng

Cont

rol

M

eas

ures

If th

is co

ntr Risk with existing

Controls Impr

ovem en

t

42

ss S

tep

Type

for S

elec

tion

of Li

kelih

ood

and

Cons

eque

nc

ol m

easu

re

effec

tive

Plan

No

Like

lihoo

d

Cons

eque

nce Ri

sk R

ating

Risk

Ban

d

Like

lihoo

d

Cons

eque

nce Ri

sk R

ating

Risk

Ban

d

KC-1

Cons

umer

inte

rfac

eContamination enters in to the consumer overhead tank due to vulnerable to access by birds/animals

P,B,C 3 2 6 M Consumer complain Consumer awareness No 3 2 6 M

KC/IP1KC/IP2KC/IP3

KC-2

Contamination enters to the underground sumps due to lack of maintenance,unprotected openings & poor construction (Especially small scale restaurant).

P,C,B 4 3 12 H Consumer complain

Consumer awareness Yes 3 2 6 MKC/IP1KC/IP2KC/IP3

KC-3


P,C,B 2 3 6 M Consumer complain Consumer awareness No 2 3 6 M

KC/IP1KC/IP2KC/IP3

KC-4


C 3 3 9 M Consumer complain

.Replacing the water meter with non-return valve.Instructions given for fixing non return valve

Yes 3 2 6 M KC4/IP1

43

5.1 Risk prioritizing table

5.1.1 Distribution System

Table 23: Risk prioritizing table-Distribution system

No Hazardous Event

Risk Assessment

before control

measure

Control Measures

Risk Assessment

After control

measures

KD-5


12


9

KD-6


12



9

KD-1

Contamination enters into pipe network due to frequent unidentified invisible pipe leakages & pipe burst. Thalapathpitiya Temple Rd

12

.Flushing the line after repairing the leak.Fixing of air Valves.Identify the leak fromLD Gang &immediately repair the leak.

9

KD-11 Contamination enters to the Reservoir water due to penetration of rain water & other impurities through reservoir top

12 .Clean the debris at top of the reservoir. 9

KD-7


12 .Flushing the pipe lines according to the Preventive maintenance programme

9

KD-3

Contamination enters into pipe network due to low pressure in the system. Obeysekarapura.Arunodaya mw,U.E. Perera mw.

15

.Immediately attend to repair leak in low pressure area..Raising & shifting the water meters which are below the ground level.(specially toilet areas & near garbage)

8

44

No Hazardous Event

Risk Assessmen

tbefore control

measure

Control Measures

Risk Assessmen

tAfter

control measures

KD-9


10

.Fix Identification tape in sewer lines.

.Proper planning at planning stage.

.When there is a leak immediately contact the relevant officer in sewerage

8

KD-2Contamination enters into pipe network due to unhygienic repair procedure due to high ground water level. Arunodaya mw.

15

.Dewatering the pipe trench before repair..Flushing the line.Awareness programmefor accurate repair method.

6

KD-10


9 .Clean the reservoir once in two years 6

KD-8Contamination enters in to pipe network system due to illegal tapping or unauthorized water connection.

9 .Inspection of illegal connection 6

KD-4Contamination enters in to pipe lines due to improper valve operations during leak repairing.

6

.Flushing the pipe lines according to the Preventive maintenance programme . .Awareness programme.

4

KD-12


9 .Covered the openings by screen mesh 1

.

45

5.1.2 Consumer Interface

Table 24: Risk prioritizing table- Consumer interface

No Hazardous Event

Risk Assessme

ntbefore control

measure

Control Measures

Risk AssessmentAfter

control measure

2


12 Consumer awareness 6

4


9.Replacing the water meter with non-return valve.Instructions given for fixing non return valve

6

1Contamination enters in to the consumer overhead tank due to vulnerable to access by birds/animals

6Consumer awareness 6

3


6Consumer awareness 6

6.

46

7. IDENTIFY AND DEVELOP IMPROVEMENT PLAN (MODULE 05)

An improvement plan was developed for the hazard events which does not indicate the green light in the reassessment stage. An improvement plan

were carried out for each of the significant risks with effective or not controls identified in the reassessment of risk recognizing that other less

significant risk can controlled by these improvement measures. Improvement plans can include short, medium or long term programs. These plans

should be monitored to be improved have been made and that WSP has been updated accordingly .(Refer for improvement Plan

WSP/KOTTE/OIC/06)

Table 25: Improvements to the Kotte WSP

Proc

ess S

tep

Hazard EventsImproveme

nt Plan NoImprovement Plan

Responsibi

lityTime frame

Progra

mme

for

Status of

progress

Sourc

e of

Fund

ed

Indicative

Cost

Dist

ributi

on S

yste

m

Contamination enters into pipe network due to frequent unidentified invisible pipe leakages & pipe burst.Thalapathpitiya Temple Rd

KD1/IP1 Proposed new pipe

replacement at Thalapathpitiya Temple rd.

Manager AE

2019- Mar-

2020-DecMediu

m term

Preparation of estimate

RH–

201958million


KD2/IP1 Fixing of 2” washout valve &

Sluice valve at Arunodaya mw.

AE OIC

2019-Apr Short term

Completed O&M 0.1 million

KD2/IP2 Training programme Manager2019 Jan-

DecLong term

On going O&M 0.05 million

47

Proc

ess S

tep

Hazard Events

Improvem

ent Plan

No

Improvement PlanRespon

sibility

Time

frame

Program

me for

Status of

progress

Sourc

e of

Fund

ed

Indicati

ve CostDi

strib

ution

Sys

tem

Contamination enters into pipe network due to low pressure in the system.Obeysekarapura.Arunodaya mw.U.E.Perera mw.

KD3/IP1 Pressure improvement by line

enlargement(110dia.410m PVC pipe laying)Arunodaya Mw.

AE OIC

2018 Sept Medium

termCompleted RH 2

million

KD3/IP2 Proposed new pipe laying by Jubilee system improvement project(ADB) DGM 2018-

2020 Long term

Ongoing ADBDollar million 53

KD3/IP3 Pressure improvement by line

enlargement(110dia.620m PVC pipe laying)UE Perera Mw.

AE OIC

2019 Feb-May Medium

termCompleted O&M 4.7

million

High turbidity water stagnates in pipe network due to low flow velocity in pipe network (dead ends).Mahawatta Road,Thalapathpitiya Kanatta Road.Papiliyana Rd

KD5/IP1 Fixing 2” Washout valve at Mahawatta road.

AE OIC

2018 Mar

Short term Completed O&M 0.1

million

KD5/IP2 Fixing 3” Washout valve at Thalapathpitiya Kanatta Road.

AE OIC

2019 Apr Short term Completed O&M 0.12

million

KD5/IP3 Fixing 4” Washout valve at Papiliyanard

AE OIC 2019 Apr Short

term Completed O & M

0.13million


KD6/IP1 100m new 110dia.PVC pipe laying Pangiriwatta road

Manager

AE Kotte

2018- Dec

Medium term Completed O&M 0.8

million

KD6/IP2 960m new 160Dia.PVC pipe laying Edirisinghe Road

Manager

AE Kotte

2019- feb-2020-Dec

Medium term On going RH 7.4

million

48

Proc

ess S

tep

Hazard Events

Impr

ovem

ent

Plan

No

Improvement PlanResponsibi

lity

Time

Frame

Program

me for

Status of

progress

Sour

ce of

Fund

ed

Indicative

CostDi

strib

ution


KD7/IP1 Proposed new pipe laying by

Jubilee system improvement project

DGM2019-

2021Long term On going ADB

Dollar

million 53


KD8/IP1 Periodically checking &

implement a programme for remove illegal connection

AE2019

Jan-Dec

Short

termOn going

Done by NRW

project


KD9/IP1 Proposed new blue colour

HDPE pipe laying by Jubilee system improvement Project.

DGM2019-

2021

Long

term On going ADB

Dollar

million 53

Rese

rvoi

r


KD10/IP1 Turbidity removal of reservoir OIC2019

May

Short

term

To be

commencedO&M 15,000


KD11/IP1 Cover the holes with suitable material

AE 2019 FebShort

termOn going O&M 15000

49

Proc

ess S

tep

Hazard Events

Impr

ovem

ent

Pla

n N

o

Improvement PlanResponsibi

lity

Time

FrameProgramm

e for

Status of

progress

Sourc

e of

Fund

ed

Indica

tive

CostCo

nsum

er in

terf

ace




KC/IP1 Consumer awareness programme, meeting.

Manager AE

2019

Feb,DecShort term Ongoing O&M 150000

KC/IP2 Announcement

programme Manager AE

2019

Feb,Dec Short term Ongoing O&M 15000

KC/IP3 Publishing Posters,

Banners, & leaflet. Manager AE

2019

Feb,DecShort term Ongoing O&M 100000


KC4/IP1 Meter rectification programme

AE2019

Jan-DecShort term Ongoing O&M 50000

The improvement plan is prioritized based on the level of risk of each hazard event after reassessing the risks, as high, medium and low prioritized

improvement activities.

50

8. OPERATION MONITORING AND CORRECTIVE ACTIONS (MODULE 06)

Hazard events which is controlled by an existing control measures are taken into consideration while developing the operation monitoring programme. The

objective of this operation monitoring and corrective action programme is to dedicate the responsibility of the monitoring of the existing controls, define

alert and critical limits of operational limits and describe the corrective action in a simple way.

Table 26: Operation Monitoring and Corrective Actions

No Hazardous event Control Measure

Operational limits Operational Monitoring of the control measure Corrective Action if the operational limits are

exceeded

Target

Critical

What will be

monitored?

How will it be monitored?

Where will it be

monitored?

Who will be monito

red?

When is it monitored?

What action is to be taken?

Who take the

action?

Who needs to be

informed?

KD-01

Contamination enters into pipe network due to frequent unidentified invisible pipe leakages & pipe burst.Thalapathpitiya temple rd

.Flushing the line after repairing the leak.Fixing of air Valves.Identify the leak from LD Gang &immediately repair the leak.

0.2 0.1 RCL Test Kit End of distribution Dead ends

Zone officer weekly

.Flushing the line

.Bowser supply

.Immediate action taken to repair the leak

Zone officer

AE

Colour Visible inspection

KD-02


.Dewatering the pipe trench before repair..Flushing the line.Awareness programme for accurate repair method.

0.2 0.1 RCL Test Kit Around the leak location

Zone officer

Occasionally .Flushing the line Zone officer

AE

Colour Visible inspection

Weekly

.Collect the water sample & check Chemist

0 1 Per100ml

E-ColiColiform

Micro Biological test

End of the distribution

Chemist Incidentally

KD-03

Contamination enters into pipe network due to unhygienic repair procedure due to high ground water level.Arunodaya mw.ObeysekarapuraU.E.Perera mw.

.Immediately attend to repair leak in low pressure area..Raising or shifting the water meters which are below the ground level.(specially toilet areas& near garbage)

0.2 0.1 RCL Test Kit

End of distribution Dead ends

Zone officer Weekly .Flushing the line

.Bowser supply

.Immediate action taken to repair the leak.Replace the water meter at Toilet area

Zone officer

AEColour Visible

inspection

Chemist

Occasionally Chemist AE0

1 Per100m

E-ColiColiform


No Hazardous event Control Measure Operational limits Operational Monitoring of the control measure Corrective Action if the operational limits are

exceeded

51

Target

Critical

What will be

monitored?

How will it be

monitored?

Where will it be monitored?

Who will be monito

red?

When is it monitored

?


Who take the

action?

Who needs to be

informed?

KD-04

Contamination enters in to pipe lines due to improper valve operations during leak repairing.

.Valve operation is done according to the SOP..Awareness programme.

0.2 0.1 RCL Test Kit Around the leak location

Zone officer

Occasionally

.Flushing the line Zone officer AE

Weekly

KD-05

High turbidity water stagnates in pipe network due to low flow velocity in pipe network (dead ends).Mahawatta Road,ThalapathpitiyaKanatta Road.Papiliyana rd


0.2 0.1 RCL Test Kit End of distribution Dead ends

Zone officer

WeeklyComplain location .Flushing the pipe

lines.Fixing washout valve.

Zone officer AETurbidity Turbidity

meterEnd of distribution Dead ends

Chemist

Occasionally

01 Per100ml

E-ColiColiform


KD-06





End of distribution of Cast iron lines

Zone officer weekly

.Descaling cast iron pipe.Flushing the pipe lines

Zone officer AE

6.5-8.5

6.5>8.5< PH PH meter Chemis

tOccasionally

KD-07


.Flushing the pipe lines according to the Preventive maintenance programme


Complain location

Zone officer

Occasionally

Flushing the line Zone officer AE

Sample locations

Zone officer Weekly

No Hazardous event Control Measure Operational limits

Operational Monitoring of the control measure Corrective Action if the operational limits are exceeded

52

Target Critical What will be

monitored?

How will it be

monitored?

Where will it be

monitored?

Who will be

monitored?



Who take the action?

Who needs to

be informed?

KD-08


.Inspection of illegal connection 0.2 0.1 RCL Test Kit

At illegal connection

NRW Periodically

Inspection & Detect the illegal connection.D\C the illegal connection & line flush.

Zone officer AE

KD-09


.Fix Identification tape in sewer lines..Proper planning at planning stage..When there is a leak immediately contact the relevant officer in sewerage

0.2 0.1 RCL Test KitAt the leak location

Zone officer

Occasionally Immediately repair the leak & Flush the line

Zone officer AE

0 1 Per100ml

E-ColiColiform


Chemist

KD-10


.Clean the reservoir once in two years


At reservoir

Zone officer

DailyOccasionally

Clean the ground reservoir

Zone officer AETurbidity Turbidity

meterChemist Occasionally

0 1 Per100ml

E-ColiColiform


KD-11


.Clean the debris at top of the reservoir

Is there any debris on reservoir top

Visual inspection

At reservoir

Pump Operator Monthly Clean the surface

Pump operatorLabour

OIC

KD-12Contamination enters to the elevated water towers due to uncovered openings

.Covered the openings by screen mesh

Availability of openings

Visual inspection

Inside the towers

Zone officer

Once in three months

Covered the openings Zone officer OIC

53

No Hazardous event Control Measure

Operational limits Operational Monitoring of the control measure Corrective Action if the operational limits are

exceeded

Target Critical What will be monitored?

How will it be

monitored?

Where will it be

monitored?

Who will be

monitored?



Who take the action?

Who needs to

be informed?

KC-01


Consumer awareness 0.2 0.1 RCL Test Kit Consumer

Tap

Zone officer

WeeklyOccasionally

.Instructions given to consumer to cover the overhead tanks.Temporally Supply water by using bourses

Zone officer AE

Chemist

KC-02

Contamination enters to the underground sumps due to lack of maintenance, unprotected openings & poor Construction (Especially small scale restaurant).


Tap

Zone officer

WeeklyOccasionally

.Instructions given to consumer clean the sump and overhead tanks.Temporally Supply water by using bourses

Zone officer AE

Chemist

KC-03



Tap

Zone officer

Weekly Occasionally

.Instructions given to consumer to improve internal pipe system

Zone officer AE

Chemist

KC-04


.Replacing the water meter with non-return valve.Instructions given for fixing non return valve

0.2 0.1 RCL Test Kit Consumer Tap

Zone officer

Weekly Occasionally

. Instructions given to consumer tofix non return valve.Open the washouts.Flush the pipe lines.Temporally Supply water by using bourses

Zone officer

OIC

Chemist

54

9. VERIFICATION PROCEDURE (MODULE 07)

The objective of developing a verification procedure is to build a body of evidence that the produced water by the Kotte WSS is compliance with SLS standard, to confirm whether the WSP is being implementing as suggested and to confirm the appropriateness of adopted operational limits.

There are three key features of the verification procedure as follows;

1. Compliance monitoring- confirmation of compliance with water quality targets

2. Internal and external auditing of operational activities it can have both an assessment and compliance checking role. The frequency audit depends on the level of confidence required by the water utility and the regulatory body.

3. Consumer satisfaction includes checking that consumers are satisfied with the water supplied

55

9.1 Compliance monitoring

Table 27: Verification –Compliance monitoring

Process Step Operational Monitoring Verification Monitoring Quality

ReportsWhat When Who What When Who

Distribution

Network

RCL

Weekly Zone Officer

Chemical

Parameters

RCL Weekly Senior Chemist

(W/C)

WSP/KOTTE/

OIC/05/I

Randomly Zone OfficerOther

chemicalMonthly

Special Cases Chemist (W/C)

Color Weekly Zone OfficerPhysical

Parameters

Colour

Weekly

Senior Chemist

(W/C)PH

TurbiditySpecial Cases Chemist (W/C)

Turbidity

PH

E-ColiSpecial Cases Chemist (W/C)

Bacteriological

Parameters

E-Coli

Coli formsWeekly

Senior Chemist

(W/C)Coli forms

Ground Reservoir

& Over Head Tank

RCL Daily Pump operatorChemical

Physical

Bacteriological Parameters

Monthly

Senior Chemist

(W/C)Turbidity

Occasionally Chemist (C/C)E-Coli

Coli forms

Consumer's

Premises

RCL

Randomly &

When ComplainedZone Officer

Chemical

Physical


Monthly

Senior Chemist

(W/C)Color

Odor

56

9.2 Consumer Satisfaction

It is important that consumers are using the safe, managed water supply rather than less safe alternatives. Verification includes consumers are

satisfied with the water supplied.

Table 28 : Verification – Consumer satisfaction

Process

Step

Operational Monitoring Verification Monitoring Records

What When Who What When Who

WSP/KOTTE/OIC/05Dist

ributi

on N

etw

ork

Complains DailyZone

Officer

Chemical Parameters Monthly Chemist

Physical Parameters

Weekly Chemist


Cons

umer

's

Prem

ises

Complains DailyZone

Officer

Chemical, Physical and

Bacteriological

Parameters

Monthly Chemist

57

10. MANAGEMENT PROCEDURES(MODULE 08)

Management procedures are clear documentation of operational procedures for action to be taken

when the system is operating under normal conditions, and incident situations. The procedures

should be written by experienced staff and should be updated as necessary, particularly in light of

implementation of the improvement / upgrade plan, review of incidents, emergencies and near

misses. It also includes documentation of the system assessment, monitoring and communication

plans and supporting programs.

Management Procedures are discussed basically under five (5) event categories as shown in table.

Table 29: Management Procedures

No. Event Management Procedure Reference

1 NormalOperational Activities Standard Operation Procedure WSP/KOTTE/OIC/07

2 Regular Maintenance Preventive Maintenance Schedule WSP/KOTTE/OIC/PMP

3 Break Downs Operation & Maintenance Manual WSP/KOTTE/OIC/07

4 Incidents Incident Review Plan WSP/KOTTE/OIC/ERP

5 Emergencies Emergency Response Plan WSP/KOTTE/OIC/ERP

6 Health & safety Occupational Health & Safety Plan WSP/KOTTE/OIC/10

Item Frequency

time

Responsible officer Monitoring

Office

1 Ground reservoir

a. Inspect inside the manhole cover Daily Caretaker/Labour OIC

b. Overall cleaning Once in 2

year

OIC/Caretaker/Labour AE

c. Preventive maintenance for valves 6 months Caretaker/Labour OIC

d. Security checking –Fencing & Gates Daily Caretaker/Labour OIC

e. Checking Manhole covers and

ladders- lock & key

Daily Caretaker/Labour OIC

f. Checking Ventilation – cover with

mesh


g. Cleaning of site Monthly Caretaker/Labour OIC

58

Item Frequency

time

Responsible officer Monitoring

Office

2. Tower

a. Inspect inside and man hole cover Daily Caretaker/Labour OIC

b. Overall Cleaning Once in 2

year

OIC/Labour AE

c. Preventive maintenance for valve 6 months Zone officer OIC

d. Security checking –Fencing and Gates Daily Caretaker/Labour OIC

e. Checking Manhole covers and

ladders- lock & key


f. Checking Ventilation – cover with

mesh


g. Cleaning of site Monthly Caretaker/Labour OIC

3. Pipe line distribution System

a. Preventive maintenance for valves

and manhole

6 months Zone Officer AE

b. Thoroughly follow the procedure at

road crossing

Continuous Zone Officer AE

c. Sample collection and analysis up to

the SLS 614;2 guide line

Monthly Chemist AE

D Flush out the line after attending any

repairs

As

required

Zone Officer AE

4. Check & evaluation of Distribution

performance

a. Water quality checking in end point Weekly Zone Officer Chemist

i. Taking corrective action to reduction

of UFW & pollution

Continuous Zone Officer AE

5. System cleaning

a. Drain /Disinfection As per the

programm

e

Zone Officer AE

59

11. SUPPORTING PROGRAMME(MODULE 09)

Operations that are essential for proper operation of control measures and still perform as indirect

support to the water safety are identified in the supporting programme.

Table 30: Supporting Programme

No Activity Purpose Examples Reference01 Training &

awareness programs for WSP

To aware activities of water safety plan for staff, stakeholders and customers.

Awareness programme for customers1.Anousement2.SMS3.Leaflet

Awareness programme for staff members.

WSP/KOTTE/OIC/09

02 Documentation of standard operation procedures, standard preventive & corrective maintenance procedures time schedule.

Upgrade efficiencies and quality of leak repair and preventive maintenance duties

SOP manual Preventive

maintenance & corrective & maintenance manual.

WSP/KOTTE/OIC/07 WSP/KOTTE/OIC/PMP

03 Installing laboratory facility to regional support center.

To upgrade water testing facility.

Upgrade testing facility for the Kotte region

04 Customer complainProtocol

To get consumer feedback to improve water quality.

Complain recording, reporting and analysis

Call center module

60

12. REVIEW OF WSP (MODULE 10)

Review of each component of WSP and itself is discussed under this chapter.

Table 31: Review Schedule

No Activity Table no Relevant file Responsibility How Often?

1 Contact detail update Table 01 WSP/KOTTE/OIC/02 Ms.D.R.Thisera Monthly

2 Stakeholder list update Table 02 WSP/KOTTE/OIC/03/II Ms.D.R.Thisera Semi-annually

3 Supporting team Table 03 WSP/KOTTE/OIC/03/III Ms.D.R.Thisera Semi-annually

4 Distribution map update Kotte GIS Map MS.H.T.N. Jayawardana Monthly

5 Hazard table update Table 21 WSP/KOTTE/OIC/03/IV Mr.D.S.R. Colambaarachchi Semi-annually

6 Control measure update Table 22 WSP/KOTTE/OIC/03/v Mr.D.S.R. Colambaarachchi Semi-annually

7 Improvement plan update Table 25 WSP/KOTTE/OIC/06 Ms. R.S. Kannangara Annually

8 Prioritizing risk update Table 23, 24 WSP/KOTTE/OIC/03/VI Mr.D.S.R. Colambaarachchi Annually

9 Operation monitoring update Table 26 WSP/KOTTE/OIC/03/VII Mr.K.C. Jayawardana. Annually

10 Corrective action plan update Table 26 WSP/KOTTE/OIC/03/VII Mr.K.C. Jayawardana. Annually

11 Verification procedure update Table 27,28 WSP/KOTTE/OIC/05 Mr.T.K.Pathirana Annually

No Activity Table no Relevant file Responsibility How Often?

61

12 Management procedure update Table 29 Area Engineer(Mr. D.A.D.U.Nishantha) Annually

13 Standard operation procedure update WSP/KOTTE/OIC/07 Ms. R.S. Kannangara Annually

14 Preventive maintenance Programme PMP WSP/KOTTE/OIC/PMP OIC(Mr.D.P. Zoyza) Annually

15 Operation & maintenance manual WSP/KOTTE/OIC/07 Ms. R.S. Kannangara Annually

16 Emergency response plan update ERP WSP/KOTTE/OIC/ERP Mr.T.K.Pathirana.

Mr.M.Y.Dammika Annually

17 Supporting program update Table 30 WSP/KOTTE/OIC/09 Area Engineer(Mr. D.A.D.U.Nishantha) Annually

18 WSP document update Ms.B.A.PathirathnaMr.M.Y.Dammika Annually

62

Table 32 : WSP auditing arrangement

Description Schedule date Held on Remarks Reference

Internal informal audit 30 Aug 2018 30 Aug 2018 Conducted by

WSP advisory

unit Peradeniya

WSP/KOTTE/OIC/11

Internal formal audit Apr 2019

External audit Oct 2019

WSP initial report has been completed in August 2018. WSP 1st revision2018 December

63

13. INCIDENT RESPONSE PLAN (MODULE 11)

Incident response is planned in pre-incident stage. Once the incident occurs, emergency response

plan is implemented followed by the recovery activities. It is assumed that after the recovery, again

the cycle return to pre-incident stage and the emergency action plan to be updated using the lessons

learned, i.e. the tacit knowledge turn into the documented knowledge.

Pre-incident planning plays a vital part of emergency response. Emergency response plan is

separately developed and discussed under management procedure in this report. Planning cycle is

described in

Figure 17: Planning Cycle

And once the incident occur incident response can be attended through six main phases as follows;

1. Preparation (described in Figure 4: Planning Cycle)

2. Identification

a. How to note the incident?

b. What tools to be used?

c. Communication Process

3. Classification (what kind of incident?)

64

4. Trace back

a. From where the incident is coming?

b. Where and how it is affecting the existing system?

c. What are the consequences?

5. Reaction

a. Is emergency response plan address the incident?

b. If ”no”, how communicate?

c. What options in the emergency response plan?

d. Which option is the best?

e. Communication Process

6. Post Mortem

a. What was done?

b. What would be preventive measures?

c. How to control?

Eg – Polduwa incident review report

(Polduwa incident review report Refer for Emergency Response Plan

WSP/KOTTE/OIC/ERP)

65

14. ACHIEVEMENTS

14.1 Rajagiriya Bridge Crossing

Figure 18: Before & after WSP at Rajagriya bridge crossing

Before WSP After WSP

66

14.2 Yakbedda Bridge Crossing Rajagiriya & Kolonnawa Ends

Figure 19: Before & after WSP Yakbadda Bridge crossing Rajagiriya end


Figure 20: Before & after WSP Yakbaddabridge crossing Kolonnawa end

Before WSPAfter

WSP

67

Figure 21: Before & after WSP consumer meter location


Figure 22 : Stakeholder meeting

68

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