SiO2
Silica is a chemical compound called
Silicone Dioxide
Grinding, jackhammering, blasting and rock drilling all allow silica dust to what?
Allow silica dust to become airborne
How many workers in the U.S. are potentially exposed to silica?
Nearly 2 million
Medical records must be kept by the employer for how long?
30 years after employment
Workers should not remove dust with
Compressed air
NIOSH suggests a REL for crystalline silica of
0.05 mg/m3
A worker wearing a respirator with an APF of 10 could expect to inhale ______ of the airborne contaminant present.
No more than one-tenth
Wet control methods should use a(n) ______ spray
Continuous
Symptoms of silicosis include
Coughing and shortness of breath
What are 3 engineering controls for silica?
Local exhaust ventilation, substitution, and wet methods
OSHA's PEL for crystalline silica is
approximately 0.1 mg/m3
Voluntarily used respirators must be
NIOSH - certified
Respiratory protection is necessary with _____ levels of silica.
Excess
Workers should have a medical exam at least every two years if they have potential crystalline silica exposure of how many years?
More than 20 years
Air monitoring determines
The effectiveness of engineering controls
The hazardous type of silica referred to throughout this discussion is?
Crystalline
Who is responsible for providing engineering controls?
Employers
OSHA's respiratory protection standard requires worksites to
Have a written respiratory protection plan
Undergo a hazard evaluation
Have periodic program evaluations
The three types of silicosis are
Accelerated, chronic, and acute
Workers with potential silica dust exposure should
Shower and change clothes at work
Silicosis is _______% preventable
100%
Other workers needing to use a respirator should use what kind of respirator?
Respirator with a 100-series filter
Abrasive blasting may also pose a risk for exposure to
Lead, arsenic, and cadmium
A medical exam should occur
At the beginning of employment
Workers performing abrasive blasting should use a
type CE abrasive-blasting respirator