Secondary containment is required for glove-bags over which size threshold?

• A. Over 1 sf or 1 lf
• B. Over 2 sf or 2 lf
• C. Over 3 sf or 3 lf
• D. Over 4 sf or 4 lf

Answer: (C)

Secondary containment is used with glove-bag removal to catch fibers if the bag leaks or tears, protecting workers and the surrounding area. The size threshold that triggers this extra containment is three square feet or three linear feet. When a glove-bag exceeds either of these measurements, the risk of fiber release increases enough that additional containment—such as a second bag, extra plastic sheeting, or an enclosure—is required to prevent exposure. If the bag is at or below this size, standard glove-bag practices are typically considered sufficient. The threshold of three square feet or three linear feet balances safety with practicality, avoiding unnecessary containment for small bags while requiring extra protection for larger, higher-risk bags.