Good practice: managing asbestos
The UK now has the highest death rate from mesothelioma in the
world. This shocking statistic was revealed in a recent HSE report
showing that mesothelioma killed 1,740 men and 316 women in the UK
in 2006. In this feature, Connect reminds readers what
they need to do if they’re involved in managing buildings.
What is asbestos?
The three most common types of asbestos usually found in
buildings are chrysotile (white), amosite (brown) and crocidolite
(blue). Asbestos can easily break into tiny fibres which float in
the air and, when inhaled, can cause serious health problems. All
types are dangerous, although crocidolite is considered to be the
most dangerous. Asbestos-related diseases people suffer from
include asbestosis, lung cancer and mesothelioma.
Asbestos in buildings
Many thousands of tons of asbestos have been used in the
construction of buildings for generations – and much of it is still
in place. Around half a million commercial buildings and a million
domestic buildings in the UK are thought to contain
asbestos. Asbestos was finally prohibited (other than for very
specialist uses) in the UK in November 1999 so buildings
constructed (or materials installed in older buildings) since 2000
can be presumed to be free from asbestos. Asbestos is likely to be
present if:
- the building was constructed or refurbished between 1950 and
1980
- the building has a metal frame
- the building has boilers with thermal insulation
Its most common uses were as:
- a coating on concrete walls and ceilings for both fire
protection and insulation
- lagging on pipework
- insulation boards used as partition walls and ceiling
tiles
- asbestos cement products such as roof and wall sheeting, tiles,
cold water tanks, gutters and pipes
Managing asbestos exposure
Anyone who manages the maintenance of
non-domestic buildings that contain, or may contain, asbestos
must consider the risk of exposure to workers and others and must
have a management system in place to identify, assess and manage
any asbestos materials on the premises. The system should
include:
- a survey of all building materials
- an assessment of the risks from any identified asbestos
materials
- a record of all materials identified as containing
asbestos, or suspected of containing it
- appropriate procedures to prevent or control exposure
- monitoring procedures
- emergency procedures if the materials are accidentally
disturbed
- training
- regular review
Asbestos Record or Register
A register must be created containing information on the
materials used and whether they contain asbestos. It’s impossible
to identify materials that contain asbestos just by looking at them
– laboratory analysis is the only way of being certain.
Survey
There are three levels of survey:
- a presumptive survey - all materials are presumed to contain
asbestos unless there's strong evidence that they don't
- a standard sampling survey - samples of materials will be
taken and analysed
- a full access or intrusive survey - material samples are taken
that are not readily accessible. This may mean making
holes in brickwork or concrete to get to the parts of a building
that may contain asbestos. This type of survey is necessary if
there are plans to demolish a building or carry out major
renovations
The survey must be carried out by a 'competent person' - someone
who:
- has appropriate training and experience
- is able to demonstrate independence, impartiality and
integrity
- has an adequate quality assurance procedure
There's no legal requirement to use a survey company accredited
by UKAS to ISO/IEC 17020 for asbestos surveys, but there are
benefits in doing so. It is a legal requirement for
laboratories carrying out bulk sampling and analysis of materials
to identify asbestos to be accredited by UKAS to ISO 17025.
The surveyor should:
- hold a preliminary site meeting with the client
- carry out a study of any existing drawings, floor plans and
specifications and investigate the different construction
phases as well as any history of major renovation work
- prepare the survey plan
- carry out a risk assessment for doing the survey
- specify how the survey data are to be recorded and
presented
Assessment of asbestos-related materials
If asbestos-containing materials are found, then an
assessment will need to be carried out which will consist of a
'Material assessment' and a 'Priority assessment'.
Material assessment
The survey team will rate the material for likelihood of fibres
being released based on factors such as product type (asbestos
cement, asbestos insulating board and friable materials such as
sprayed coatings), damage or deterioration, surface treatment and
asbestos type.
Priority assessment
The occupier of the building should consider the likelihood of
the materials being disturbed. Factors such as general activity,
exposure potential and maintenance activity need to be
considered.
Corrective measures
If any material containing asbestos is in good condition, is not
likely to be damaged, worked on or disturbed, then it's safest to
leave it in place and introduce a management system. It may be
decided that to reduce risk further, certain corrective measures
should be carried out. These measures could include minor repairs,
enclosure (involving the construction of airtight walls and
ceilings around asbestos-containing materials) or encapsulation to
control the release of asbestos fibres in the air. Any corrective
measures must not expose the workers carrying them out, or anyone
else, to risk from the asbestos.
Employers must make sure that all work which may disturb
materials containing asbestos is carried out in accordance with the
Control of Asbestos
Regulations 2006.
The work must be carried out by workers whose employer has a
licence issued by the HSE unless they are minor works with a very
low risk of exposure. Regulation 3(2) of the Asbestos Regulations
has details of the exemption.
Removal
If the decision is made to remove any of the materials, then the
work will usually be carried out by a licensed asbestos removal
contractor. The issue of a licence by the HSE doesn’t, in itself,
confirm competence, so the following should be considered:
- the actual licence issued by the HSE must be produced – not a
photocopy
- what period does the licence cover? A licence issued only for
12 months suggests that the contractor is either new to the work or
the HSE has some concerns
- detailed training records of managers and employees
- examples of method statements prepared for previous jobs
- references from other clients
The contractor must produce a plan of work or method statement
detailing how they will carry out the work. The document should be
agreed before work starts and must be available near the working
area – this is covered under Regulation 7 of
the Asbestos Regulations.
Maintenance
The purpose of an asbestos management system is to make sure
that the right measures are taken by maintenance workers and
outside contractors whenever work is done which could disturb
asbestos-related materials. The system should include:
- an assessment of any work which may disturb the fabric of the
building to be certain that materials containing asbestos
won't be affected
- notice to those working in the building that they must not
disturb the fabric of the building without permission
- informing maintenance teams and outside contractors where
asbestos-containing materials are located
- warning signs or labels on materials containing asbestos
Asbestos-related training
Training courses are required for members of the property
management group and maintenance supervisors and staff. Training
should be given on:
- potential hazards associated with exposure
- location of asbestos-containing materials
- personal protection
- proper handling of asbestos-containing materials
- asbestos waste disposal
- maintenance records
Surveillance
Periodic assessment should be performed on all
asbestos-containing materials which remain in the building. How
frequent the surveillance is will depend on factors such as the
condition of the materials, accessibility and level of activity in
the area.
Our thanks to Terry ap Hywel who contributed to this
article.
Links
HSE
UKAS
IOSH Occupational Health
Toolkit
Asbestos: the hidden killer – IOSH professional
development course Monday 21 September
Asbestos victims to be represented
Stark home asbestos message for global memorial
day