A study was conducted to determine whether installing cables above a suspended tile ceiling where a low-density asbestos-containing fireproofing was present on the structural beams and decking would result in elevated airborne concentrations of asbestos. The study was designed to simulate routine cable installation and cleaning typical of that used by service workers when they are unaware of the presence of asbestos. Personal and area air sampling was conducted before, during and after the installation of 12 cables. Personal and area air sampling was also conducted during cleaning activities approximately two hours after the cable installation. All samples and blanks were analyzed by transmission electron microscopy (TEM) using an indirect preparation technique. Results are reported as asbestos structures per cubic centimeter of air (s/cm3).
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