Name a non-destructive method for sampling asbestos.

Using a HEPA vacuum to collect fiber samples without damaging the material is a recognized non-destructive sampling method for asbestos. This approach allows for the collection of airborne fibers while minimizing disturbance to the original material. The HEPA (High-Efficiency Particulate Air) filter ensures that even very small particles, including asbestos fibers, are trapped and collected effectively. This method retains the integrity of the material being tested, making it a preferred choice for assessing potential asbestos contamination without causing additional damage or releasing more fibers into the environment.

In contrast, using a hammer to chip materials or taking a core sample would physically alter or damage the material, rendering those methods destructive. Visual inspection, while valuable for initial assessments, does not provide tangible samples for analysis and therefore does not qualify as a sampling method. The use of a HEPA vacuum for fiber collection encompasses the non-invasive principles necessary for thorough asbestos analysis while protecting the structure being tested.