What is a small, waterproof carrier or bag used to carry debris from a structure during salvage operations?

The correct choice is a salvage cover. A salvage cover is specifically designed for salvage operations; it is a small, waterproof carrier or bag that fire fighters use to collect and transport debris from a structure. The purpose of a salvage cover is to protect property from further damage during firefighting efforts, as well as to assist in the cleanup process by providing a means to move away debris efficiently.

In context, while other options may be related to firefighting or salvage operations, they serve different purposes. A carryall is a general term for a carrier bag, often larger and not specifically designed for salvage tasks. A water chute is typically used to direct water flow during firefighting but does not function as a debris carrier. A fire blanket, while a crucial tool for extinguishing fires or providing protection, does not facilitate the removal of debris from a structure.