Transcript Please read this before using presentation • This presentation is based on content presented at the industry information session on risk-based hygiene.

Please read this before using presentation
• This presentation is based on content presented at the industry
information session on risk-based hygiene management
planning held in May 2015
• It is made available for non-commercial use (e.g. toolbox
meetings, OHS discussions) subject to the condition that the
PowerPoint file is not altered without permission from
Resources Safety
• Supporting resources, such as brochures and posters, are
available from Resources Safety
• For resources, information or clarification, please contact:
[email protected]
or visit
www.dmp.wa.gov.au/ResourcesSafety
www.dmp.wa.gov.au/ResourcesSafety
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Our commitment
To work with industry to reduce serious accidents and
incidents, and provide tangible support in achieving a
positive cultural change.
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Resources Safety’s focus
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What is risk-based hygiene management
planning and how does it relate to CONTAM?
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Why the change from CONTAM?
CONTAM
• Was initiated to get sites conducting
personal exposure monitoring for
certain contaminants –
specifically dusts and respirable silica
• Targeted contaminants known to be present or generated
in the majority of Western Australian mining operations
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Was it risk-based?
CONTAM
• did not require the identification or investigation of
exceedances, nor the implementation or effectiveness
monitoring of controls
• didn’t allow for
‒ changes in mining operations and work populations
‒ SEG formation
‒ recognition of health hazards other than particulateform atmospheric contaminants
*SEG = similar exposure groups
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So what do we need to do now (May 2015)?
CONTAM will remain as a
results database in the
short-term
Over the next 12 months, sites
will enter their health- and
hygiene-related data directly
into the Safety Regulation
System (SRS)
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What else do we need to do now (May 2015)?
Continue to use the financial year as your time gauge
for sampling programs
That means, getting ready over the next month for the
2015-16 program
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Risk-based Hygiene Management Plan (RBHMP)
• Termed management planning to align with the ‘principal
hazard management planning’ of the proposed new
legislation
• Being risk-based means:
– non-prescriptive
– its effectiveness is wholly based on
the knowledge, competence,
and commitment of the people
involved in its development and
implementation
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RBHMP is an opportunity to …
work out exactly what is going on in your workplaces
• What are your personnel actually and potentially exposed to?
• How are they protected (or not) from those exposures?
• What needs to be done for their protection in the short-term
and long-term?
• How do you confirm whether you got it right (or not) in relation
to control implementation?
• What do you have in place to continuously monitor and
review?
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What is your role?
You have a choice – do it right the first time or don’t
Worst thing you can do is to shirk your responsibility by
going for something generic, and missing out on an
opportunity to identify and manage the health hazards
specific to your site
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Start
Workplace
characterisation
Exposure
assessment
Acceptable
exposure
Uncertain
Unacceptable
exposure
Control
Further information
gathering
Monitor and
review
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Start
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Establish the goals
What does your site want to
achieve from RBHMP?
─ Where is your site in relation to its
mine life and maturity of health
and hygiene management?
Role and responsibility identification
─ Depending on the size of your site and its hierarchical
structure, you might be doing all things, one thing, or
nothing
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Start
Workplace characterisation
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Characterise your workplace
Gather information that will be used to understand the tasks
being performed, materials being used, processes being run
and controls in place, so that a picture of exposure
conditions can be made!
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Gather workplace information
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Break it down
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Break it down further!
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Gather workplace information
Include ‘the forgotten’
• Is there haulage?
• Is exploration happening?
• Is rehabilitation happening?
• Is there an airstrip?
• Is there an accommodation village?
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Gather workforce information
Use a variety of resources:
• Rosters
• Job descriptions
• Worker interviews
• OBSERVATION
• OBSERVATION
• OBSERVATION
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Gather health hazard information
Consider each potentially hazardous agent:
• Physical
─ Noise
─ Vibration
─ Radiation
─ Temperature (heat or cold)
─ Ergonomics
• Chemical
• Biological
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Health effects information
The information you define here will assist with
identifying whether an exposure is acceptable or
unacceptable
• Toxicology and/or health impact potential
• Acute versus cumulative
• OELs and BEIs (and adjustment)
* OEL = Occupational exposure limit
* BEI = Biological exposure index
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Start
Workplace characterisation
Exposure
assessment
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Exposure assessment – Define SEGs
Steps to defining SEGs:
1. Observation
•
•
•
•
•
Classification by task and environmental agent
Classification by task, process and environmental agent
Classification by task, process, job description, and
environmental agent
Classification by work teams
Classification by non-repetitive work tasks or jobs
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Define SEGs
2. Sampling
• Relies on the review of previously collected data to
classify the workforce
• Requires sufficient sample data and high degree of
statistical confidence
• Often difficult to do well, particularly where monitoring
records are poor and information collected about the
sampling environment is sparse
A combined observation and sampling approach is the
most PRACTICAL method of defining a SEG
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Exposure assessment – exposure profiles
Summarises and judges exposures to health
hazards in the workplace
• Combine information from the basic
characterisation with the SEG information
• Exposure rating – use your site criteria
– Estimate of exposure relative to the
OEL
– Considers monitoring data, surrogate
data, prediction
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Start
Workplace
characterisation
Exposure
assessment
Acceptable
exposure
Uncertain
Unacceptable
exposure
Control
Further information
gathering
Monitor and
review
www.dmp.wa.gov.au/ResourcesSafety
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Exposure profile - acceptability
• Acceptable?
• Unacceptable?
• Uncertain?
Acceptable
Unacceptable / Uncertain
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Managing uncertainty and unacceptability Sample number determination
Let’s talk about:
• Confidence limits
• Baseline versus maintenance versus campaign
• Quarterly numbers
• Random selection
N (size of group)
# (number of samples
required)
≤6
7-8
9-11
12-14
15-18
19-26
27-43
44-50
51+
6
6
7
8
9
10
11
12
14
(reference: Leidel, Busch and Lynch, 1977, NIOSH)
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Results strategy
You have to know from the start what you are going to
do in the event that:
• You receive an anomalous result or exceedance
• Your baseline data confirms acceptable or
unacceptable exposures
• Your baseline data confirms SEG unacceptability
• Your maintenance data contradicts baseline
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SEG acceptability
Confirmation of SEG by statistical analysis
Review and redefining the SEG where necessary
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Controls
The list provided in the procedure does not represent all
health hazards and associated controls, and should
only be used as an example
… and what about monitoring and review?
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RBHMP approval, re-assessment and quota
proposal
• What do you do when you have
generated a RBHMP document?
• When should you review and
update it?
• And what about the sampling
numbers?
Contact [email protected] if you need to
know the answers to these questions
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Stay informed!
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