Define silica and identify its most common source materials.
Describe the potential chronic health effects of chronic silica exposure.
Recognize workplace activities that may generate airborne respirable silica.
Describe basic methods to mitigate airborne silica dust.
Describe actions that minimize the risk of exposure to crystalline silica.
Describe the basics of combined protections that can be implemented to prevent exposure to silica-containing compounds.
This lesson is designed to improve the safety of workers in environments where silica exposure hazards exist by increasing employee awareness of this hazard and by demonstrating how the hazard can be recognized and addressed in the workplace.
The Occupational Safety and Health Administration (OSHA) has issued a final rule to curb lung cancer, silicosis, chronic obstructive pulmonary disease and kidney disease in America's workers by limiting their exposure to respirable crystalline silica. The rule is comprised of two standards, one for Construction and one for General Industry and Maritime.
OSHA estimates that the rule will save over 600 lives and prevent more than 900 new cases of silicosis each year, once its effects are fully realized. The Final Rule is projected to provide net benefits of about $7.7 billion, annually.
About 2.3 million workers are exposed to respirable crystalline silica in their workplaces, including 2 million construction workers who drill, cut, crush, or grind silica-containing materials such as concrete and stone, and 300,000 workers in general industry operations such as brick manufacturing, foundries, and hydraulic fracturing, also known as fracking. Responsible employers have been protecting workers from harmful exposure to respirable crystalline silica for years, using widely-available equipment that controls dust with water or a vacuum system.
Reduces the permissible exposure limit (PEL) for respirable crystalline silica to 50 micrograms per cubic meter of air, averaged over an 8-hour shift.
Requires employers to: use engineering controls (such as water or ventilation) to limit worker exposure to the PEL; provide respirators when engineering controls cannot adequately limit exposure; limit worker access to high exposure areas; develop a written exposure control plan, offer medical exams to highly exposed workers, and train workers on silica risks and how to limit exposures.
Provides medical exams to monitor highly exposed workers and gives them information about their lung health.
Provides flexibility to help employers — especially small businesses — protect workers from silica exposure.
Both standards contained in the final rule take effect on June 23, 2016., after which industries have one to five years to comply with most requirements, based on the following schedule:
Construction - June 23, 2017, one year after the effective date.
General Industry and Maritime - June 23, 2018, two years after the effective date.
Hydraulic Fracturing - June 23, 2018, two years after the effective date for all provisions except Engineering Controls, which have a compliance date of June 23, 2021.
Silica and Its Health Effects
Minimizing Your Risk
OSHA's Final Rule to Protect Workers from Exposure to Respirable Crystalline Silica
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