The road is straight. It’s the journey that’s twisted. Southeastern District Team. Lexington. Sanford. Knoxville. Franklin. Columbia. Birmingham. Macon. Bartow. San Juan. Health Issues. Southeastern District – MSHA - MNM Spring Thaw Meeting By Dave Rosenau.
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Southeastern District – MSHA - MNM
Spring Thaw Meeting
Is your occupational safety and health
Program on FULL?
Is it heading towards empty ?
Dust and Noise exposures continue to exist…………
A disabling lung disease that is progressive
Medical Definition: A lung disease caused by the inhalation of respirable silica particles. The particles induce an immune response in the human lung causing scar tissue to form within the air exchange sacs of the lung.
Pneumoconiosis (dusty lung) pulmonary conditions related to dust inhalation.
Exposure to Fine Dust
Size in Microns Time to Fall 1 ft.
0.25 u 590 minutes
There are still many theories on the physical impact of crystalline silica on lung
a) Material hardness
b) Sharp edges
d) Electrochemical properties
e) *Immunological response
(macrophage enzymes and free radicals)
Ultimately,..... a person with chronic silicosis may expire from the cumulative cardiopulmonary effects of silicosis.
PERMISSIBLE EXPOSURE LIMIT
PEL = 10 mg / m
% Quartz + 2
Let’s assume we’ve discovered several areas of dust over-exposure .......
a. Engineering control options are to be evaluated first.
b. Look at isolating the employee from the process if possible.
c. Engineering controls can be more cost effective over time.
1) Check ventilation system
2) All ductwork solid ?
3) Fan motor performance
4) Fan motor mounts
5) Belts tight
6) Fan blade wear
7) System balanced
8) System changes
9) Capture velocities
10) Duct transport velocity
11) How often is system
cost vs. payback
the air, did it settle in
the duct ?
Silica in it ?
When the dust contains respirable silica:
1) First priorityis to prevent dust release.
2) Educate employees on what equipment to use,... and how to most effectively do the job. (Document training sessions)
3) Consider HEPA vacuum methods
4) Consider wet collection methods where practical.
Required Elements of a Written Respirator Program
- Identify respirable silica exposures NOW,
- Retrofit with engineering controls,
- As a manager… it is your responsibility to adequately safeguard your employees.
- The cost to companies has been devastating over the years,...and
- The cost to human life ISterminal.
Is your compass just a little off ?
“No one needs to lose his or her hearing in order to earn a living.”
2004 motto by the National Hearing Conservation Association
System of Monitoring...62.110
Audiometric Testing…....62.170 - 62.175
Percent of NRR actually
provided at the ear drum
Have you developed a policy for the type of personal protective to be used at your mine…..and for special tasks ?
silica and noise.
We need your help !
So we ALL benefit.
They’re a phone call away.
1) Effective safety programs have test data on-hand to communicate.
2) Good occupational health data assists educators.
3) Educators freely share knowledge,
Today,..knowledge is the ONLY remaining competitive edge.
Feel free to contact the Macon Field Office
Birmingham District Office:
Crushed Stone, Sandstone, Limestone, Sand & Gravel, Dimensional stone, Dimensional Granite
Sources of Respirable Dust:
Silica may be present in the rock ........
Coal & Metal Mining & Quarrying 18520
Construction 97 10.5
Steelworks and metal finishing 67 7.2
Misc.nonmetallic mineral products 54 5.8
Iron & Steel foundries 46 5.0
All other industries 477 51.0