An Australian stocks and flows model for asbestos

Area of Science:

• Environmental Science
• Materials Science
• Public Health

Background:

• Asbestos-containing materials (ACMs) persist in Australia's built environment.
• Accurate data on remaining ACMs and their characteristics are crucial for risk assessment.
• Understanding the lifecycle of ACMs is essential for long-term management and removal strategies.

Purpose of the Study:

• To collate data on asbestos consumption in Australia.
• To identify common asbestos-containing materials (ACMs) in the built environment.
• To estimate the lifetime of ACM products and model their future stock and flow until 2100.

Main Methods:

• Data collation on asbestos consumption in Australia.
• Determination of asbestos proportion and product types for common ACMs.
• Estimation of product lifetimes using a Weibull distribution model.
• Development of a user-friendly Excel-based model for projecting ACM stocks and flows.

Main Results:

• Identification of the most common ACMs remaining in Australia's built environment.
• Quantification of asbestos content within various materials.
• Estimation of high, low, and model-specific parameters for product lifetimes.
• A projection model for ACM stocks and flows in Australia up to the year 2100.

Conclusions:

• The developed model provides a framework for projecting the future presence of ACMs.
• The model's user-friendly design allows for parameter adjustments as new data emerge.
• This research supports informed decision-making for managing asbestos risks in Australia.