Silica Safety Training: Lessons From September 11 and the Importance of Protecting Workers
The rescue and recovery efforts following the September 11 attacks demonstrated the serious consequences of uncontrolled dust exposure. As first responders, construction workers, volunteers, and recovery personnel searched for victims, they worked in an environment filled with pulverized concrete, glass, gypsum, smoke, metals, fibers, and other hazardous materials.
Respiratory protection was not always immediately available, consistently worn, or adequate for the conditions. Many responders experienced significant exposure before they fully understood the danger of the dust. In the years that followed, thousands of people involved in the response and recovery developed respiratory illnesses and other health conditions.
The World Trade Center disaster involved a complex mixture of contaminants and should not be attributed to silica alone. However, it remains a powerful reminder that hazardous dust can cause permanent harm—and that workers must be protected before exposure occurs.
What Is Respirable Crystalline Silica?
Crystalline silica is a naturally occurring mineral found in concrete, brick, mortar, stone, sand, tile, and many other construction materials. When workers cut, drill, grind, crush, demolish, or otherwise disturb these materials, they can release extremely small particles called respirable crystalline silica.
These particles are too small to see and can travel deep into the lungs when inhaled. Workers may be exposed even when the amount of visible dust appears minor.
Common silica-producing activities include:
- Cutting or grinding concrete, brick, block, tile, or stone
- Drilling into concrete or masonry
- Jackhammering and chipping
- Crushing or demolishing concrete structures
- Tuckpointing and mortar removal
- Using powered saws on silica-containing materials
- Dry sweeping or using compressed air to clean accumulated dust
Silica-Related Diseases May Take Years to Develop
Silicosis is a permanent lung disease caused by inhaling respirable crystalline silica. Chronic silicosis commonly develops after many years of occupational exposure—often 15 to 20 years. More intense exposure can cause the disease to develop much sooner.
Because symptoms may not appear immediately, workers can continue breathing hazardous dust without realizing that lung damage is occurring.
Exposure to respirable crystalline silica is also associated with:
- Lung cancer
- Chronic obstructive pulmonary disease
- Kidney disease
- Increased susceptibility to tuberculosis
- Progressive and irreversible loss of lung function
There is no cure for silicosis. Prevention is the most effective protection.
Controlling Silica Exposure
Employers must identify tasks that could expose workers to respirable crystalline silica and implement appropriate controls. Depending on the task and applicable OSHA standard, protective measures may include:
- Using tools equipped with integrated water-delivery systems
- Using local exhaust ventilation and dust collection
- Following OSHA’s specified control methods for covered construction tasks
- Restricting access to areas where exposure may occur
- Avoiding dry sweeping and compressed-air cleaning when safer methods are feasible
- Providing appropriate respiratory protection when required
- Conducting exposure assessments when necessary
- Providing required medical surveillance
- Training workers about silica hazards and protective measures
Respirators should not automatically replace effective engineering and work-practice controls. Employers must first use feasible methods to reduce airborne dust and then provide respiratory protection when those controls do not reduce exposure sufficiently or when the applicable standard requires it.
Written Silica Exposure Control Plans
A written exposure control plan is an important part of an effective silica program—and is required for covered work under OSHA’s silica standards.
The plan should identify:
- Tasks involving potential silica exposure
- Engineering controls used to limit exposure
- Work practices workers must follow
- Respiratory protection required for specific tasks
- Housekeeping procedures used to control dust
- Methods for restricting access to affected areas
- The competent person responsible for implementing the construction plan, when applicable
The plan must reflect the employer’s actual tasks and work practices. A generic document that does not match workplace conditions may not adequately protect workers. Employers should review the plan regularly and update it whenever tasks, equipment, materials, or control methods change.
Why do we need Silica Training?
We do the training because most workers dont know the health effects of silica and go to work for a day's pay to have money to enjoy life. I was doing a job site safety inspection one day, and from the room I was inspecting, I watched a worker cutting concrete block. I looked because it was very quiet, and then the saw started. As I looked out, within seconds I lost sight of the worker in a cloud of dust created from cutting the concrete block. 2-3 minutes later, the dust cleared, and I could see him; he had no respirator on. As I started to walk over to advise him that PPE is required for this task on the job site, he started the saw again to cut more block. I eventually talked to him, and he said he didn't know and said he would get a respirator. This is just one of the many times, during job site safety walks, I had to educate workers on the health hazards of silica and that there is no cure. Lung transplants only give a limited benefit, and the overall average life expectancy after a lung transplant is six to six and a half years, though many patients live ten years or longer. Say you are 30 years old; by the time you are 50, you get silicosis. After a lung transplant, you live to 56, maybe 60 if you are lucky.
Silica Safety Training Available Nationwide
KARM Safety Solutions provides practical online silica safety training for workers, supervisors, competent persons, and employers in all 50 states.
Our training helps participants understand how to:
- Recognize materials and tasks that may create silica dust
- Understand the serious health effects of exposure
- Apply appropriate engineering and work-practice controls
- Use respiratory protection correctly when required
- Follow written exposure-control procedures
- Recognize unsafe dust-control and housekeeping practices
- Understand employee and employer responsibilities
We also help employers develop or review OSHA-required written silica exposure control plans based on their actual work activities.
Training is an essential part of prevention, but it must be supported by effective planning, proper equipment, workplace controls, supervision, and employee participation.
Protect Workers Before Symptoms Appear
Silica-related diseases can develop silently over many years. By the time symptoms are noticeable, permanent lung damage may already have occurred.
Employers should not wait for an illness, inspection, citation, or close call before addressing silica exposure. Identifying hazardous tasks, controlling dust, training workers, and maintaining an effective written plan can prevent exposure and save lives.
Contact KARM Safety Solutions to learn more about online silica training or assistance with your written silica exposure control plan.
Building Safer Workplaces—One Training at a Time.













