Under the Asbestos Hazard Emergency Response Act (AHERA), are five transmission electron microscopy (TEM) outside air samples required to be collected with the five inside and the two blanks if the inside samples and blanks are below 70 structures/mm2?
The five outdoor samples must be collected in addition to the five indoor samples, the two field blanks, and the one sealed blank for a total of thirteen air samples. (40 CFR part 763.90(i)(3)) If the five inside samples are below 70 structures/mm2 and the volume of air used for…