REI stands for Restricted Entry Interval; what does it require of workers after a pesticide application?

• A. That unprotected workers may re-enter immediately.
• B. That unprotected workers do not enter the treated area until the interval has elapsed or entry is allowed by the label with appropriate PPE.
• C. That only trained supervisors may re-enter regardless of interval.
• D. That entry is prohibited for 30 days.

Answer: (B)

Restricted Entry Interval means a period after a pesticide application during which entering the treated area is limited to protect workers from exposure. After spraying, unprotected workers cannot enter until the interval has elapsed, unless the label explicitly allows entry with the required PPE. This ensures that exposure risks are minimized during the immediate post-application period.

So, the best choice reflects that unprotected entry is not allowed during the interval, and entry may be permitted during REI only if the label specifies the appropriate PPE. The other statements don’t fit: unprotected entry isn’t allowed immediately, entry isn’t restricted only to supervisors, and REI durations aren’t fixed to 30 days but depend on the product label.