It is important to eliminate the possibility of the residue of one experiment being present in an apparatus when the next experiment is conducted. The combination of chemicals might be dangerous. Shelves with raised edges are recommended for equipment storage. Aisles should be unobstructed, and access to safety equipment such as fire extinguishers or safety blankets must not be blocked. making sure that wastes are deposited in appropriate receptacles. See Chapter VII.C.3, Disposing of Waste, for removal procedures.
Accidents Be alert for the possibility of an accident.
Know where all safety equipment is located and how it works. Know the location of emergency cutoff switches or valves for gas and electricity. Check all physical facilities and equipment to ensure maximum safety conditions. Take prompt action to report and correct unsafe conditions. See below Chapter V.C.2, Responses to Specific Types of Injuries.