HHSRS VERSION 2

SEPTEMBER 2004

HHSRS VERSION 2

ASBESTOS

Vulnerable group

Related hazards

All persons

None

Multiple locations

Secondary hazards

Yes

Yes

No

No

A) Base of External wall

A) Fibres on ground

DESCRIPTION OF HAZARDS

A) Front door

Dwelling:

1950s pre-fabricated bungalow.

LIST OF RELEVANT MATTERS

LIKELIHOOD & OUTCOMES

A

# Secondary hazards

A

a

Date of construction

3

-

None

b

Presence of asbestos

3

c

Unsealed asbestos

3

d

Unlabelled asbestos

3

Key

3

Seriously defective

e

Disrepair - damage

3

2

Defective

f

Presence of MMF

-

1

Not satisfactory

-

Satisfactory/NA

External walls: There is evidence that the asbestos sheet insulation to the pre-fabricated wall panels is

breaking down. Where the base of the wall panels has broken or is missing, fibrous material has

accumulated on the ground. This has occurred at several places on the ground and paths around the

base of the house, including positions close to the front door. No hazard warnings are present.

A)

Improved

A B C D E F G H

I

Average likelihood, outcomes and HHSRS score for risk from asbestos for all persons in

1946-79 dwellings, 1997-99.

Score

38

HHSRS VERSION 2

SEPTEMBER 2004

HEALTH AND SAFETY RATING SYSTEM SCORES

1946-79 Bungalow

LIKELIHOOD

Low

High

1 in

180

Average: 1700k

Example

180

4200 2400 1300 750 420 240 130

75

42

24

13

7.5

4

2.5

1.5

Justification

OUTCOMES

Class I

Class II

Class III

Class IV

Justification

RATING

The extent of the breakdown of the asbestos insulation sheets and the accumulation of

fibres on the ground close to the front door means that the likelihood of a hazardous

event occurring within a 12 month period is relatively high, particularly if one includes the

pschological effects caused by the fear of asbestos in and around the home. However,

the problem is confined to outside of the dwelling where the fibres are widely dispersed

by the air, producing a substantially smaller risk than the same problem indoors.

%

Average: 19.0

21.5

1.0

0.0

77.5

Likelihood to

1 in 5,600

Outcomes to

21.5 1.0

0.0 77.5 %

The asbestos sheets have deteriorated too badly to be sealed and their careful removal,

under controlled conditions, is required to eliminate the health and safety risk. Once

cleansed of any residual fibres resulting from the removal, the likelihood would reduce to

that for a minimum exposure background level.

19.0

0.05 0.15 0.3

0.7

1.5

3

7

15

26

38

Av: 1.0

1.0

0.05 0.15 0.3

0.7

1.5

3

7

15

26

38

Av: 0.0

0.0

0.05 0.15 0.3

0.7

1.5

3

7

15

26

38

Av: 80.0

43.6

0.05 0.15 0.3

0.7

1.5

3

7

15

26

38

The spread of possible health outcomes resulting from inhaling asbestos fibres in

relatively small quantities is likely to remain the same regardless of the increased

likelihood of such an event occurring.

Example

C

A B

Average: <1

D E F G H

I

J

1204

Score

RATING SCORES AFTER IMPROVEMENT

Av: <1

J

IMPROVE

Justification

NEW RATING

Av: Nos