Which location is NOT recommended for collecting ambient (area) samples?

When collecting ambient (area) samples for asbestos monitoring, the goal is to assess the air quality in areas where workers or the public may be exposed to asbestos fibers. Collecting samples outside the building is typically not recommended for assessing the internal environment where asbestos disturbance may occur, especially during an abatement project.

Sampling outside could be influenced by various environmental factors such as wind, traffic, and other external sources of airborne particles, which can lead to inaccurate results that do not reflect the actual conditions inside. This increases the likelihood of measuring airborne fibers from sources unrelated to the building or the containment operations.

Meanwhile, areas such as inside containment, outside containment but still within the building, and at the entrance to the Decon chamber are strategically chosen locations more relevant for monitoring the immediate air quality where asbestos is being disturbed or where personnel are transitioning in and out of containment zones. These locations provide a clearer picture of the potential exposure risks workers or building occupants face from asbestos fibers.