A method and apparatus are provided for at least partially environmentally isolating a volume, such as by environmentally isolating the cargo compartment from the passenger compartment of an aircraft. In the context of an apparatus, a barrier curtain is provided that partially defines the volume. The apparatus also includes a cable extending along one or more walls that partially define the volume. The barrier curtain is supported by the cable. The apparatus may also include a cable release mechanism. The cable is held in place by the cable release mechanism and the cable release mechanism is configured to detach the cable at a predetermined load, thereby permitting the barrier curtain to drop in response to a decompression event.