Thank you so much once again to the excellent Technician who attended. He is fabulous and we are so grateful for his thorough approach.
Googled and tried several ideas to remove my ant nest. Contacted Border Pest Control, 10 minutes of spray and not a single an't to be seen. My work factory has also been using Border Pest for many years, always punctual, friendly and efficient, with professinal results. Could not recommend them highly enough.