Good morning . It was good talking with you. Today I completed your one time service for bees. I noticed where the yellow jackets were entering and exiting from 2 openings in the stone wall by the back patio. I applied a non repellent treatment to these two spots and the entire wall targeting yellow jackets. Activity between 2-5 days is normal. If you are still seeing activity after 5 days, give us a call and we will return for another treatment. If you have any further questions or concerns please contact our office. Thank you for choosing Green Pest Solutions and have a great day.