What is the primary means of collecting personal air samples in asbestos monitoring?

The primary means of collecting personal air samples in asbestos monitoring is the low-flow, battery-operated pump. This equipment is specifically designed to meet the needs of air sampling for asbestos fibers in occupational settings. The low-flow pump operates at a controlled low flow rate, which is essential for accurately capturing airborne asbestos particles during an individual's work shift.

By using a pump, the sampling can be performed in real-time as the worker goes about their tasks, providing a representative sample of the air they breathe. This method is crucial for assessing exposure levels and ensuring compliance with safety standards. The pumps can be fitted with specific filters that are capable of trapping asbestos fibers, allowing for subsequent analysis in a laboratory to determine fiber concentrations.

The other methods mentioned are not suitable for personal air sampling in this context. Handheld vacuum apparatus might not provide the controlled flow needed for accurate sampling, while standard household fans do not facilitate targeted air collection relevant to monitoring a worker's exposure. High-volume stationary filters are typically used in environmental monitoring or for larger area sampling rather than personal monitoring, as they cannot be easily worn or operated by individuals in a typical working environment. Thus, the low-flow, battery-operated pump stands out as the most effective and appropriate choice for personal air monitoring of asbestos.