Vermiculite and Glass Wool attic insulation
The question of what constitutes a “safe” level of asbestos is complex and often misunderstood. LCS Laboratory Inc. frequently addresses concerns from clients, including this inquiry:
Question:
“I’m hiring a contractor to work in my attic and want to prove it’s safe for them. Is there an official government source that defines what percentages of asbestos are considered safe? Many sites state there is no safe level, but I’m wondering if those are influenced by asbestos removal companies. Could you clarify?”
Understanding Legal Limits vs. Safe Concentrations
Legal Limit:
A legal limit for asbestos is a government-mandated threshold that varies by jurisdiction. In Ontario, Canada, the Ontario Asbestos Regulation 278/05 defines a material as “Asbestos-Containing Material” (ACM) if it contains 0.5% asbestos or more by weight. Below this threshold, the material is not legally considered ACM, and additional asbestos-specific handling requirements do not apply. The regulation also specifies the number of samples required to confirm whether a material is ACM, but this is a different topic.
Safe Concentration:
Safety, however, is situational and depends on how the material is handled. For example:
- A cement board containing 30% asbestos is safe as long as it remains intact and undisturbed.
- Activities such as drilling, cutting, or removal can release hazardous asbestos fibres into the air, making even small percentages unsafe under those conditions.
In short, while the legal definition of ACM provides guidance, the safe handling of materials depends on minimizing fibre release during use or renovation activities.
Is There Really No Safe Level?
Many resources emphasize that no level of asbestos exposure is entirely safe, which reflects a cautious approach given asbestos’s health risks, including mesothelioma and asbestosis. This perspective ensures maximum protection for workers and the public, irrespective of material type or concentration.
When Should You Test for Asbestos?
Testing is essential if you plan to disturb materials that might contain asbestos. It allows contractors to take appropriate precautions and ensures compliance with local regulations.
Ready to Test Your Materials?
LCS Laboratory Inc. offers accurate and timely asbestos testing to help you make informed decisions.
Visit our FAQ page for details on pricing, sample submission, and shipping. For any other questions or to place an order, please email us. Stay safe by identifying and managing asbestos risks effectively.
