Are there any other work practices used to control asbestos emissions during removal?
Additional control methods, which can be used alone or together, can control asbestos emissions. These include, but are not limited to: Negative pressure enclosure systems. In a negative pressure enclosure (NPE), air is changed at least 4 times per hour and is directed away from workers within the enclosure and towards a HEPA filtration or a collection device. The NPE is kept under negative pressure throughout the period of its use. There is also a requirement to maintain a minimum of -0.02 column inches of water pressure differential. This is normally accomplished with a manometer. Glove bag systems. A glove bag is a sealed compartment with attached inner gloves for the handling of ACM. Properly installed and used, glove bags provide a small work area enclosure and may be used to remove ACM from straight runs of piping and elbows and other connections. Negative pressure glove bag systems. These are similar to the glove bags described above, except a HEPA vacuum system or other device
