Use and Care Manual

Source
Ingredient
Material name
TWA
STEL
Peak
Notes
US OSHA Permissible
Exposure Limits (PELs)
Table Z-1
Talc
Particulates Not Otherwise
Regulated (PNOR)- Total dust
15 mg/m3
Not Available
Not
Available
Not
Available
US OSHA Permissible
Exposure Limits (PELs)
Table Z-1
Talc
Particulates Not Otherwise
Regulated (PNOR)- Respirable
fraction
5 mg/m3
Not Available
Not
Available
Not
Available
US NIOSH Recommended
Exposure Limits (RELs)
Talc
Talc (containing no asbestos and
less than 1% quartz) - respirable
2 mg/m3
Not Available
Not
Available
Not
Available
US ACGIH Threshold Limit
Values (TLV)
Talc
Talc: Containing no asbestos
fibers (Respirable particulate
matter)
2 mg/m3
Not Available
Not
Available
A4
US ACGIH Threshold Limit
Values (TLV)
Talc
Talc: Containing asbestos fibers
Not Available
Not Available
Not
Available
A1
Exposure controls
Appropriate engineering
controls
Engineering controls are used to remove a hazard or place a barrier between the worker and the hazard. Well-designed
engineering controls can be highly effective in protecting workers and will typically be independent of worker interactions to
provide this high level of protection.
The basic types of engineering controls are:
Process controls which involve changing the way a job activity or process is done to reduce the risk.
Enclosure and/or isolation of emission source which keeps a selected hazard 'physically' away from the worker and ventilation
that strategically 'adds' and 'removes' air in the work environment. Ventilation can remove or dilute an air contaminant if designed
properly. The design of a ventilation system must match the particular process and chemical or contaminant in use.
Employers may need to use multiple types of controls to prevent employee overexposure.
General exhaust is adequate under normal operating conditions. Local exhaust ventilation may be required in special
circumstances. If risk of overexposure exists, wear approved respirator. Supplied-air type respirator may be required in special
circumstances. Correct fit is essential to ensure adequate protection. Provide adequate ventilation in warehouses and enclosed
storage areas. Air contaminants generated in the workplace possess varying 'escape' velocities which, in turn, determine the
'capture velocities' of fresh circulating air required to effectively remove the contaminant.
Type of Contaminant:
Air Speed:
solvent, vapours, degreasing etc., evaporating from tank (in still air).
0.25-0.5 m/s
(50-100 f/min)
aerosols, fumes from pouring operations, intermittent container filling, low speed conveyer transfers,
welding, spray drift, plating acid fumes, pickling (released at low velocity into zone of active generation)
0.5-1 m/s (100-200
f/min.)
direct spray, spray painting in shallow booths, drum filling, conveyer loading, crusher dusts, gas discharge
(active generation into zone of rapid air motion)
1-2.5 m/s (200-500
f/min.)
grinding, abrasive blasting, tumbling, high speed wheel generated dusts (released at high initial velocity
into zone of very high rapid air motion)
2.5-10 m/s
(500-2000 f/min.)
Within each range the appropriate value depends on:
Lower end of the range
Upper end of the range
1: Room air currents minimal or favourable to capture
1: Disturbing room air currents
2: Contaminants of low toxicity or of nuisance value only.
2: Contaminants of high toxicity
3: Intermittent, low production.
3: High production, heavy use
4: Large hood or large air mass in motion
4: Small hood-local control only
Simple theory shows that air velocity falls rapidly with distance away from the opening of a simple extraction pipe. Velocity
generally decreases with the square of distance from the extraction point (in simple cases). Therefore the air speed at the
extraction point should be adjusted, accordingly, after reference to distance from the contaminating source. The air velocity at the
extraction fan, for example, should be a minimum of 1-2 m/s (200-400 f/min) for extraction of solvents generated in a tank 2
meters distant from the extraction point. Other mechanical considerations, producing performance deficits within the extraction
apparatus, make it essential that theoretical air velocities are multiplied by factors of 10 or more when extraction systems are
installed or used.
Personal protection
Eye and face protection
Safety glasses with side shields.
Chemical goggles.
Contact lenses may pose a special hazard; soft contact lenses may absorb and concentrate irritants. A written policy
Version No:
1.4
Page
7
of
15
Hercules Brush-on Block
Issue Date:
02/28/2022
Print Date:
02/28/2022
Continued...