2,4 - D LV6 Herbicide treated areas are safe to return to once dry, typically after 4-6 hours. If possible 24 hours would be best to be safe.
2,4 - D LV6 Herbicide vary greatly depending on what and where you are treating. Below is a link to the product label instructions for you to review. Please note that this product does not have a per gallon or per 1,000 sq ft breakdown as it is meant to be used over large areas.