Concerning ABS samples, when is it appropriate to use personal samples vs. perimeter samples (upwind or downwind)?
Area samples can be targeted to be co-incident with particular human activities, including those occurring for the purpose of ABS. While personal monitors are the best estimate of exposure to individuals whose activities match those wearing the monitors, area samples may also provide information regarding the surrounding airborne concentration and potential personal exposure. Area samples are also useful in providing data for evaluating: exposure to bystanders, releasability of asbestos from substrates, effectiveness of engineering controls, and selection of personal protection equipment (PPE). In using area samples to judge effectiveness of engineering controls, the samplers are often placed at the perimeter of the ABS area (i.e., upwind and downwind).
