Today I completed your one time service for Yellowjackets. After an inspection you had Yellowjackets nesting in the ceiling of your unfinished utility room. I treated the nest with a knock down aerosol and then with a liquid residual application. I then removed the nest. As advised, you may still see a stray Yellowjacket in basement over the next few days to week or so. But after that you shouldn’t see anymore. Please contact our office if you have any questions or concerns. Thank you for choosing Green Pest Solutions and have a great day.