Chapter Review Date (a) A center must have a secure room for the safe storage of janitorial supplies and equipment, poisonous materials, and toxic materials.(b) A center must label and identify poisonous and toxic substances and place them in locked cabinets that are used for no other purpose.(c) A center must provide a janitor's closet with mechanical forced air exhaust to the outside.(d) A center must install child proof latches onto closet and cabinet doors that are accessible to a minor.