Enclosed spaces, or confined spaces, present some of the most hazardous working conditions in various industries, from construction and manufacturing to utilities and agriculture. In fact, a recent literature review on confined spaces in the construction sector found multiple instances where a single incident resulted in several fatalities, stating that physical and atmospheric hazards were the most common reasons behind them. Another report on incidents on cargo ships and tankers found that seemingly harmless cargo like wood chips posed a danger. These reports cumulatively demonstrate that the risks associated with enclosed environments are often underestimated, leading to serious injuries and fatalities.
Without proper training, workers may not recognize present dangers, respond effectively to emergencies, or follow necessary safety procedures. It’s vital for companies with employees working in enclosed places to ensure they receive the training they need to carry out their duties safely and remain compliant with existing regulations in British Columbia.
The Hidden Dangers of Enclosed Spaces
WorkSafeBC defines a confined space as ‘an enclosed or partially enclosed area that is big enough for a worker to enter.’ It further clarifies that these places are not designed for human occupancy. Very often they have small entrances and exits or obstructions that make movement difficult. This means that places like swimming pools or crawlspaces with external ventilation do not fall into this category.
Common examples of confined spaces include storage tanks, silos, tunnels, pipelines, manholes, and sewers. These environments pose several risks that can be life-threatening. Additionally, conditions in confined spaces can change rapidly, making a space that is safe one day potentially deadly the next.
Hazardous Atmospheres
Confined spaces can contain hazardous atmospheres, including low oxygen levels, toxic air, or explosive gases, all of which pose serious risks to workers.
Lack of Oxygen
You might be familiar with the old stories where a canary was let down a mine shaft to determine if it was safe. Oxygen deficiency is still one of the most significant hazards workers in enclosed areas face. Low oxygen levels cause brain damage and stop the heart in just a few minutes. Oxygen levels can drop for several reasons including actions carried out by workers themselves, like cutting or welding during maintenance and repair work. Other reasons include rusting metal, rotting organic materials (like those in sewer lines), or the displacement of oxygen by other gases.
Dropping oxygen levels cannot be seen or smelt, but must be checked using oxygen monitors.
Toxic Atmospheres
The lack of oxygen is only one of the hazards posed by the air in confined spaces. The poor ventilation also allows hazardous gases to accumulate. These gases can be toxic, flammable, or both. For example, liquid fuels can evaporate to create a flammable and toxic atmosphere. The inhalation of these gases can cause immediate harm including respiratory failure, loss of consciousness, and death. Workers in these spaces need to use properly set up air monitors with the correct sensors along with ventilation techniques to remain safe.
Fire and Explosion Hazards
Flammable gases, vapors, and combustible dust can create an explosive atmosphere within enclosed spaces. For example, coal dust can explode if it reaches a certain level in the air or chemicals may react with each other to turn explosive. Additionally, faulty equipment brought in by workers can leak explosive materials. Methane from decomposing organic materials can also reach flammable levels. A single spark from equipment, static electricity, or even friction can trigger an explosion.
Entrapment, Engulfment, and Physical Hazards
Enclosed areas can be unstable themselves (think tunnels) or contain shifting materials (grain silos, for example). Falling materials, slip hazards, or unsteady ladders can also pose a threat to workers. Loose materials can trap or suffocate workers while large amounts of liquid can lead to drowning. Extreme temperatures are also real threats. Small entry and exit points can make escape in such situations difficult.
The Importance of Professional Training
Many incidents involving confined spaces can be attributed to a lack of proper training. It’s no surprise that employers are required by law to provide comprehensive confined space entry training for workers. Confined space courses that provide both theoretical and practical hands-on training equip workers to deal with real-world situations and navigate through hazards calmly and confidently.
Professional confined space training typically includes:
1. Identifying Hazards Before Entry
Hazards vary depending on worksites. Workers learn to identify potential confined space hazards before they step into them. This helps them prepare for what lies ahead, including ensuring they have all the necessary PPE. Hazard assessments are essential to determine the level of risk and necessary precautions.
2. Learning Proper Safety Procedures
Safety protocols have been developed for a reason. Training provides workers with knowledge of best practices for confined space entry, including:
- Conducting pre-entry risk assessments
- Using appropriate personal protective equipment (PPE)
- Implementing ventilation and air monitoring systems
- Establishing effective communication methods
Workers must also be trained in the use of confined space permits, which outline safety measures and ensure proper authorization before entry.
3. Safe Use of Equipment
Enclosed space training teaches workers how to properly use critical safety equipment, including gas detectors for monitoring oxygen levels and detecting toxic gases, respiratory protective devices for poor air quality, harnesses and retrieval systems for emergency rescues, and ventilation equipment to maintain a safe atmosphere. Without proper training, workers may misuse or neglect this equipment, increasing the risk of accidents.
4. Emergency Response and Rescue Training
Emergencies in confined spaces demand rapid, well-coordinated responses. Professional training equips workers to evacuate safely during gas leaks, fires, or structural failures, and carry out rescue procedures with minimal risk to themselves. Effective communication is also crucial in these situations, ensuring that all team members stay informed and respond efficiently to prevent further harm
5. Compliance with Regulations
In Canada, occupational health and safety laws require that employers provide confined space training to workers. Failure to comply with these regulations can result in hefty fines, legal consequences, and, most importantly, preventable injuries or fatalities.
The responsibility to keep workers safe ultimately lies with employers. One of the strongest ways to do this is by equipping them with the skills and knowledge they need to do so themselves.
Investing in effective confined space training for your employees not only creates a culture of safety but also ensures you are meeting your legal obligations as well.
Get in touch with us to schedule safety training today!
