This document summarizes airborne dust monitoring results and discusses best practices for dust control in mining operations. Key points: - Airborne dust monitoring results from 2017-2019 show levels decreasing but some operations still exceeding standards. - Factors contributing to exceedances include increased stone cutting, poor panel ventilation, and inadequate dust controls when cutting. - Examples of good dust control initiatives seen in industry include dust awareness training, respiratory protection policies, pre-start checklists, and use of real-time dust monitors. - Effective dust control requires identifying all sources, implementing controls at each source, monitoring control effectiveness, and having response plans to address changing conditions before exposures occur. Complacency must be avoided to prevent

1. Safety and Health
Representatives
Seminar
Airborne dust update
&
What does good dust
control look like?
September 2019

2. Collected Order 42 Airborne Dust Results
2541
2393
1825
976
1896
1722
1376 1382
811
0
500
1000
1500
2000
2500
3000
2017 2018 2019 YTD (July)
Respirable Dust Quartz Inhalable Dust

3. Order 42 Surface Worker Exposure
Average Result as % of Workplace Exposure Standard (WES)
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019
Workplace Exposure Standard Respirable Dust Quartz Inhalable Dust

4. Order 42 Underground Worker Exposure
Average Result as % of Workplace Exposure Standard (WES)
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019
Workplace Exposure Standard Respirable Dust Quartz Inhalable Dust

5. July 2019 YTD Order 42 Airborne Dust Exceedances
23
10
7
1 1 1UG - Longwall
UG - Continuous mining and bolting
UG - Outbye
UG - Place change mining
UG - Ventilation device installers
UG - Secondary support

6. 2018-2019 YTD Order 42 Respirable Dust and Quartz
Exceedance Rates
0.00%
2.00%
4.00%
6.00%
8.00%
10.00%
12.00%
14.00%
16.00%
Longwall Development Outbye Blast Crew Blast Drillers Field
Maintenance
CHPP
2018
Jul-19

7. 2018-2019 YTD Respirable Dust and Quartz Exceedance Rates
Impact of Proposed SWA Workplace Exposure Standards (WES)
0.00%
2.00%
4.00%
6.00%
8.00%
10.00%
12.00%
14.00%
16.00%
Longwall Development Outbye Blast Crew Blast Drillers Field
Maintenance
CHPP
2018
2018 Proposed
WES
Jul-19
Jul-19 Proposed
WES

8. July 2019 YTD Order 42 Airborne Dust Exceedances
Respiratory Protective Equipment (RPE) use
50.9%
14.6%
10.9%
10.9%
5.5%
5.5%1.8%
P2 Disposable
PAPR
None
P2 Full Face
P2 Half Face
P3 Half Face
Not Reported 0.00%
2.00%
4.00%
6.00%
8.00%
10.00%
12.00%
14.00%
16.00%
2017 2018 Jul-19
% of Exceedance Results
where RPE reported as
“None”

9. 2019 Order 42 Airborne Dust Exceedance Contributing
Factors Review
Positive Trends
 Improved longwall operator positioning practices
 Improved ventilation standards during stopping spraying
 Improved handling and management of stone dust (calcium carbonate)
Improvement Opportunities
 Review controls when cutting increased stone on longwalls
 Enforce continuous miner panel ventilation standards
 Review continuous miner breakaway process dust control

10. Examples of Good Control Initiatives in Industry
 Uptake of Coal Services dust awareness training
 Strengthening of respiratory protection policies
 Pre-start checklists / audits that include dust control considerations
 Consistency of longwall automation across crews
 Use of real time dust monitors by sites
 Job rotation procedures

11. Safety and Health
Representatives
Seminar
What does good dust
control look like?
Takeaways to consider

12. What does good dust control look like?
Identify sources of dust generation in all areas of the mine workings
All dust comes from somewhere – find it.
On a work site, dust will be generated in multiple ways.
Each dust source needs to be individually identified.
Once dust is airborne it is difficult to control, so….
To effectively control dust, it must be controlled at the source

13. What does good dust control look like?
Develop and implement dust controls for each activity on site.
Operating procedures need to be revised to include dust exposure.
Start the review at the original risk assessment.
When conducting risk assessments, do we consider what may harm through
disease, like we consider what may harm through injury?
Follow the hierarchy of control principles to manage the risk of dust exposure to
acceptable limits

14. What does good dust control look like?
Develop a Trigger Action Response Plan (TARP) for the purpose of reducing
personal exposures when conditions change.
Everyone needs to be clear on what we need to do differently in changing
conditions.
Mining conditions are very rarely ‘business as usual’ – conditions are continually
changing.
Be proactively prepared for change.

15. What does good dust control look like?
Review the effectiveness of controls in a systematic way.
Inspect, maintain and monitor controls and equipment.
Consider the use of real time monitors to identify change.
Engineering controls are not ‘set and forget’.

16. What does good dust control look like?
If it’s dustier than usual, there’s probably a damn good reason.
You know your workplace. If it’s dustier than usual don’t ignore it – investigate it.
If you ignore it – you accept it.
“It’s just always dusty when we break away.”
“Nobody else seems to care about cleaning out the cabin.”

17. A word about Complacency
The health impacts of dust exposure are not immediate.
This latency period is fertile ground for growing complacency.
Not controlling dust by simply ‘normalising’ it, has no place in our industry.
Show leadership – the standards you are prepared to accept are the standards
you are teaching our current and next generation of coal workers.

18. Occupational lung disease is 100% preventable
“And always remember:
What’s on your face you can
wash off,
but what’s on your lungs you
can’t.
So be safe, and take care of
yourself.”