Final answer:
A sign indicating the location of fire extinguishers shall be kept in the compactor room.
Step-by-step explanation:
The sentence is most likely referencing a health or safety requirement related to waste management facilities. In the compactor room, a critical location for dealing with waste materials, it is important that signage indicating the location of safety equipment or emergency procedures be clearly displayed. These could include the location of things like fire extinguishers, circuit breakers, or other safety-related tools. Having such signs in place is often a regulatory requirement to ensure safety and to provide clear instructions in case of an emergency.