Buildings that contain ACM (asbestos-containing-materials) may present unique problems for custodial workers. The release of asbestos by aging and deteriorated ACM is known to be episodic, relating to a myriad of factors such as activity within the area, vibration, temperature, humidity, airflow, use patterns, etc. Hopefully, for the majority of buildings containing ACM, fiber release is minimal. If a building contains asbestos and releases occur, the custodial worker may be most intensely affected over the long term. If a release occurs, much of the asbestos will eventually settle and attach to the surfaces of the rooms (walls, furnishings, equipment, floors, and carpet). The preliminary analysis of dusty environments is presented for the micro-vac, sonification, and passive air current sampling methodologies.