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TRANSCRIPT
THE ROLE OF THE MICROBIOLOGY LABORATORY IN
INCIDENT RESPONSE MANAGEMENT
VIOLET M PHAHLAMOHLAKA
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PRESENTATION OUTLINE
• Objectives
• Background
• Incident Response Management
• The Critical Role of the Microbiology Laboratory
• Conclusion
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• Discuss the need for emergency protocols in drinking water
quality management
• Demonstrate the critical role that the microbiology
laboratory plays in drinking water quality management during a
crisis situation
OBJECTIVES
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BACKGROUND
• Water quality incidents do occur , it is essential to have
formalised procedures to respond to these incidents
which referred as IRM
• Companywide JW has protocols that form basis of IRM
i.e. Water Quality Monitoring Plan, Disaster Management
plan and Standard Operating Procedures
Incident response management
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• Microbiological testing is an important role of maintaining water
quality free from pathogens or contamination for the protection of
public health
• Providing advice and data which is essential for decision making
at all levels
BACKGROUND
Microbiology Laboratory
2 Confirmed single result or more than 2 failures in a
distribution zone or area, no immediate health risk of any
bacteriological or chemical kind
3 Widespread bacteriological or chemical contamination,
potential health of immediate health risk
BACKGROUND
1 Water quality failure in a single sample, no immediate health
risk of any bacteriological or chemical kind
Emergency Levels
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Key Roles and responsibilities
INCIDENT RESPONSE MANAGEMENT
Communications
Operations
Scientific
Services
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Communications
• Different key stakeholders
• Community and consumers
Loud-hailing and public material
• Political principals
Councillors
National government
• Media handling
Print and broadcast
Media statements
Key roles and responsibilities
INCIDENT RESPONSE MANAGEMENT
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Operations
• Provision of Tankers
• Flushing of pipelines
• Chlorination
Key Roles and responsibilities
INCIDENT RESPONSE MANAGEMENT
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Scientific Services (Microbiology Lab)
Key Roles and Responsibilities
INCIDENT RESPONSE MANAGEMENT
Sampling •Analysis Advisory
Advisory
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THE CRITICAL ROLE OF THE MICRO
LABORATORY
• Proper sampling techniques are
extremely important in obtaining
accurate water quality data
• Extensive sampling takes place
• During crisis samplers and scientist
work 24hrs to monitor the process
- Proper equipment and skill a requirement
- i.e. reading chlorine levels at night
Sampling
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THE CRITICAL ROLE OF THE MICRO
LABORATORY
• Samples are taken in batches after every flushing for
approximately 1 hour for microbiological analysis
Sampling
TEST OPERATIONAL INDICATOR
SANS 241 Ed 1 LIMIT
E.Coli per 100mL Yes 1
Not detected
Total coliforms per 100mL Yes 1
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Heterotrophic plate count per 1mL
5 000
pH 5.0 to 9.7
Total chlorine, mg/L 5.0
Turbidity, NTU 1.0
Colour, Pt-Co 15
Protozoa – Cryptosporidium 2 Not detected
Protozoa – Giardia 2 Not detected
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THE CRITICAL ROLE OF THE MICRO
LABORATORY
• Microbiological analysis are done in accordance with the
SANS 241:6.1
• Quality assurance and control measures are followed to ensure
that the results are accurate and reliable
• Determinants
- E.coli
-Total coliforms
- Heterotrophic Plate Count
Analysis
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THE CRITICAL ROLE OF THE MICRO
LABORATORY
Analysis
• Monitoring progress of remedial actions during crisis
situations
• Providing advice and information which is essential for
decision making at all levels of the organization
CRITICAL ROLE OF MICRO
LABORATORY
KEY STATS
• Surface Area 1626 km2
• 65 km North to South
• 35 km East to West
• 11 000 km water
reticulation
• Serves population of 3.8
million
• 88 Reservoirs
• 33 Towers
Reservoirs
Towers
CASE STUDY
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THE CRITICAL ROLE OF THE MICRO
LABORATORY
• Highest risk is mostly caused by the old superimposed or
parallel pipe systems approximately 2m apart
Case Study
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THE CRITICAL ROLE OF THE
LABORATORY
• Incident happened while upgrading sewer infrastructure
• The sewer line was accidentally broken into reticulation water
line
• Sampling & analysis took place which indicated excessive
contamination
• Shut down the whole area & Emergency Level 3 activated
• Key stakeholders informed
• Water network area isolated
Diesploot crisis
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• Flushing & chlorination
• Flushing for 1hour which improved the water quality
• Microbiological analysis were done until the water complied with standard
• Resume with routine monitoring programme
Diepsloot crisis
THE CRITICAL ROLE OF THE MICRO
LABORATORY
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CASE STUDY:ORANGE FARM
THE CRITICAL ROLE OF THE MICRO
LABORATORY
April 2005 similar incident happened in
Orange Farm township
Superimposed Water and Sewer line
was accidentally broken
This was a widespread severe
contamination which led to 153 people
hospitalized
In addition of flushing the network,
4000 plus households were flushed
individually and over 300 samples
were analysed within a 2 weeks period
• The microbiology laboratory plays a critical role in:
• Protection of public health
• Ensuring water is fit for human consumption
• Restoration of water supply
• Accuracy of analysis very critical
• Monitoring progress of operations' teams remedial actions
• Providing technical advice and information which is essential for
decision making at all levels of the organization
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CONCLUSION
“Thousands have lived without love; not one without water.”
W. B. Auden
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CONCLUSION
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Russell Rimmer
Jones Mnisi
Adam Wilsenach
Ian Cooper
JW Management
ACKNOWLEGEMENTS
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THANK YOU &
QUESTIONS