Good morning Alan. Today we completed your pest control service for yellowjacket. We checked in the attic to find the backside of the hive and treated that area along with any of the beams that these yellow jackets are traveling with a liquid residual insecticide. Then we treated one of the entry points on the exterior of the home with a liquid residual insecticide. A couple of the holes were sealed up with foam prior to service today and we tried to reopen those holes to treat those entry points. Please do not seal up any holes until total activity has ceased. Please allow 7 to 10 days for this treatment method to reach its maximum effectiveness. If activity persists after that timeframe, please don’t hesitate to contact our office. Thank you for choosing Green Pest solutions and have a wonderful day.