How many categories are Asbestos Containing Building Materials (ACBM) divided into?

Asbestos Containing Building Materials (ACBM) are categorized primarily into three main categories based on the amount of asbestos present and the type of material. These categories include:

1. Category I: These are materials that contain a high percentage of asbestos, typically over 1%. Examples include transite panels and thermal system insulation. They are likely to be friable and can release asbestos fibers easily when disturbed.

2. Category II: This category includes materials that contain a lower percentage of asbestos but can still release fibers when disturbed. Examples might include certain types of resilient floor coverings or roofing materials. These materials are generally more stable than Category I but still require careful management.

3. Category III: This includes materials that are non-friable and pose a low risk of releasing asbestos fibers, such as vinyl flooring and certain types of wallboard. While they may still contain asbestos, they are considered safer compared to the previous two categories unless significantly damaged.

Understanding these categories is crucial for anyone involved in asbestos management and abatement, as it helps in assessing the level of risk associated with different types of materials containing asbestos.