SAFE OPERATIONS MEETING
Lead In Construction
In the construction industry, lead exposure is a serious issue that many workers face every day. Lead exposure can occur during a variety of job activities. Lead is common in a wide range of materials including paints and other coatings, lead mortars, and base metals, which may be welded on or blasted with abasives. Lead presents a potentially serious occupational health hazard when lead-containing dust particles become airborne. Common jobs on a construction site that might expose a worker to lead include:
Exposure to lead occurs through breathing of lead dust, fumes, or mist and by ingestion of lead dust on cigarettes, chewing tobacco, make-up, or food.
How can worker exposure to lead be minimized? Employers of job sites that might contain lead are required by law to recognize the potential hazard. For example, painted surfaces must be presumed to contain lead until all layers of the paint are sampled and analyzed. The detection of any amount of lead in the paint will trigger numerous requirements, even for common tasks such as drywall demolition, manual paint scraping, and manual paint sanding. The employer is required to conduct air sampling to determine the exposure to lead during these tasks and during other tasks that could result in lead exposure. Until actual exposures are determined, workers are required to wear respirators that are appropriate to the task. Detailed requirements are published in the regulatory standards for lead in construction.
All workers who may be exposed to lead must be trained in the hazards of lead. The results of air sampling are used to determine if workers are exposed to lead above the action level (AL) of 30 micrograms per cubic meter of air or above the permissible exposure limit (PEL) of 50 micrograms of lead per cubic meter of air, averaged over an 8-hour shift. Exposures above the AL or PEL will trigger additional requirements including engineering controls, proper housekeeping, facilities for hand and face washing, worker training, respiratory protection, medical monitoring, and air sampling. The employer must have a written compliance plan.
There are many precautions that workers can take to avoid getting overexposed:
Lead may negatively affect the blood system, nervous system, kidneys, and reproductive organs. A worker who is exposed to lead above the action level must have a blood test to determine the amount of lead in the blood. If the blood test results indicate that the worker has been overexposed to lead, then the worker must be removed from working with lead. The employer must maintain the worker’s earnings, seniority, and benefits during medical removal.
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