Environmental Assessment of Friable Asbestos from Soil to Air Using the Releasable Asbestos Sampler (RAS).

Area of Science:

• Environmental Science
• Occupational Health
• Geology

Background:

• Asbestos contamination in soils poses significant environmental and health risks.
• Activity-based sampling (ABS) is a traditional method for assessing airborne asbestos.
• Developing alternative, feasible sampling methods is crucial for effective risk management.

Purpose of the Study:

• To evaluate the feasibility of the releasable asbestos sampler (RAS) as an alternative to ABS for laboratory and field applications.
• To investigate the influence of wind velocity and water content on releasable asbestos from contaminated soils.
• To apply RAS for risk assessment, including Excess Lifetime Cancer Risk (ELCR) estimation, at asbestos-contaminated mine sites.

Main Methods:

• Laboratory and field testing of the modified RAS equipment on soil samples from Jecheon and Jongmin-ri mines.
• Controlled application of varying wind velocities and water content levels.
• Analysis of asbestos concentrations and calculation of ELCR for risk assessment.

Main Results:

• Releasable asbestos levels significantly increased with higher wind velocities and lower soil water content.
• RAS proved feasible as an alternative to ABS for assessing airborne asbestos potential.
• ELCR calculations indicated risks exceeding the threshold in some Jongmin-ri mine soil samples.

Conclusions:

• The RAS is a viable tool for evaluating airborne asbestos from contaminated soils under varying environmental conditions.
• Risk assessment using RAS highlights specific sites, like Jongmin-ri mine, requiring urgent remediation.
• Findings underscore the need for effective control measures for friable asbestos in mine vicinity soils.