What is a Re-Entry Interval (REI)?

• A. The time after which dismantling equipment is allowed.
• B. The interval between applications during the day.
• C. The time before you can re-enter the store.
• D. The minimum time after application before workers may re-enter the treated area, as stated on the label.

Answer: (D)

Re-entry Interval is the minimum time after a pesticide is applied that workers must wait before entering the treated area. This safety window is set on the product label to limit exposure and can vary by product, formulation, application rate, weather, and whether protective equipment is used. After the label’s REI has passed, workers may enter with standard precautions as directed on the label. This is why the correct concept is the minimum time after application before workers may re-enter the treated area, as stated on the label. The other choices describe actions that aren’t about the waiting period after application.