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South AfricanNational Blood Services Constantion Kloof, Roodepoort

River Embankment incident

Risk assessment

March 2015

Prepared by: Stefan Olivier National Enterprise Risk Manager SANBS

Background.

Registration No. 2000/026390/08

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A project of enhancing and strengthening the embankment alongside the South African National Blood Service (SANBS) Constantia Kloof Campus was initiated and completed over the period 2013 t0 2015. The river passes next to the National Headquarters of the South African National Blood Services. The erosion of the river bank posed a threat to the property and foundation integrity of the buildings of the SANBS. The initial project of enhancement and strengthening with the construction of a bull nose, gabions and weirs, to reduce the impact of both the natural river flow erosion and also flood waters, was completed at the end of 2014 and signed off in the beginning of 2015. Incident On 16 February 2015, initiated by severe rainfall, a flash flood event occurred that on assessment, exceeded the 50 year flood line. Inspection by the SANBS SHE management and in consultation with external environmental specialist and engineers, reported the following observations and structural impact:

1. Gabions structure compromised in certain key contact points and requires emergency repair and reinforcement. 2. Weir 2 – damaged and requires reconstruction / repairs and also reinforcement. 3. Post repairs of existing infrastructure, additional enhancement and reinforcing required. 4. The original risk to the foundation of the SANBS National Head Office property has reemerged due to the incident. 5. Climate trends and rainfall patterns over the past 6 to 12 month period indicate a significant risk of reoccurrence of the flash flood

event. Reference is made to the enclosed areal risk map provided at the time of the original project. Dated 19 July 2013 – produced by Eco Africa. The new incident revisits most of the original risks and we highlight the more focused impact to the operational ability of SANBS to provide our critical service to society, in the further event of not repairing and enhancing the embankment support infrastructure. We take note and subject ourselves to the requirements of relevant national regulations and protocols to be followed, and municipal by-laws relevant to our location.

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Site ref. Infrastructure Infrastructure at Risk Strategic impact Risk impact rating

A Electrical

Transformer Room

&

Electricity

Generator Facility

Backup power source for the critical operations of this SANBS site.

The transformers on the site lie within the high risk area and the oil

used in cooling could potentially enter the watercourse should sudden

collapse occur. This will result in a high risk re. pollution and

environmental health for down-stream users

The standby generators lie within the high risk area and have a diesel

storage capacity of 3,200 liters. This hazardous substance could

potentially enter the watercourse should sudden collapse occur. This

will result in a high risk re. pollution and environmental health for

down-stream users.

Sustainable

business model

Catastrophic

B UPS Facility Interim power supply source for the critical operations of this SANBS

site. The UPS room on the western boundary is a controlled

environment containing hydrogen, which is an explosive gas. A sudden

collapse and damage to the structural integrity of the building could

render this facility an explosive risk.

Sustainable

business model

Catastrophic

C QC National Quality control for the support of equipment and consumable

goods in the blood collection, testing, storage and supply processes.

Safety and risk Critical

D SLS National Special Laboratory Services for the testing and matching of

organ donations in all public sector hospitals

Security of supply Catastrophic

E Radiation Radiation Facility: The Cesium radiation plant on the upper story on

the western side could become compromised if sudden collapse leads

to the structural integrity of the building. This will result in a high risk

re. pollution and broader environmental health.


F Call Centre The Egoli regional call centre for recruitment and scheduling of donors

imacting the supply of blood if not operational due to embankment

Security of supply Significant

G NAT National Blood donation testing for the northern part of the country

impacting blood safety and ability to supply core product


H Processing Egoli blood processing centre impacting regional collections and

supply if impacted

Security of supply Critical

I Maintenance National Maintenance office and also Egoli region support to all critical

operations

Sustainable

business model

Significant

SANBS _ Post flash flood Risk Assessment - 20 Feb 2015

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Site ref. Infrastructure Infrastructure at Risk Strategic impact Risk impact rating

J Plasma Plasma Storage Facility: The national blood plasma storage facility on

the southern boundary lies within the high risk area and should

sudden collapse occur and the controlled environment (-18 degrees

Celsius) be compromised, the 23,000 liters of human plasma will

become infectious and pose a serious risk re. pollution and

environmental health for down-stream users. The loss of this facility

will have a severe impact on the national health care facility.


K Waste station Hazardous Waste Storage Facility: A hazardous waste storage and

collection facility on the south-western corner with a throughput

capacity of approximately 6,160 liters per month lies in close proximity

to the subsiding embankment and within the high risk area. If sudden

collapse occurs, this facility and it’s contents will land up in the water

course. This will result in a high risk re. pollution and environmental

health for down-stream users.

Safety and risk Catastrophic

L River Sudden collapse carries severely high risk of pollution and significant

detrimental impacts to the environment and down-stream, as well as

surrounding users.


M Bridge -

Constantia Blvd

Flooding Risk: The sudden collapse and the potential for further knock

on collapse with result in large volumes of silt being deposited in the

stream and further downstream, potentially resulting in a flood risk to

the bridge over Constantia Boulevard, neighboring properties and

downstream properties.


N Borehole Back up water supply source identified and in process of infrastructure

implementation to support critical functions during utilities suppply

shortage from municipal water / Rand Water.

Sustainable

business model

Significant

SANBS _ Post flash flood Risk Assessment - 20 Feb 2015

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Damaged Gabions Damaged Weir Damaged Gabions and downstream at risk

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Areal map of SANBS infrastructure at risk as per the Risk assessment.

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Evidence of Flood Damage to Other Properties

Damage to CADAC access road adjacent to SANBS Constantia Kloof Campus

Damage to the JRA existing stabilisation and Constantia Blvd support structure

Damage to Residence in Randpark Ridge (source: Randburg Sun)

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Damage to Platina Street Bridge in Jukskei Park (source: Randburg Sun)

Damaged Property in Malanshof (source: SABC News)

Flooded Property in Malanshof (source: SABC News)

south africannational blood services constantion … 1 of 8 south africannational blood services...

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