Jonathan Willette » Radon Measurements & Mitigation Services Go back to directory. Jonathan Willette Willette Inspections, LLC 500 Cardinal Drive Mankato MN 56001 work Work Phone: 507-995-6960work Work Email: willetteinspections@gmail.comINTERNET Categories: Affiliates, Home Inspector, Radon Measurements & Mitigation Services Updated 4 years ago.