This letter is to acknowledge and thank you for the great job you did installing the piping for our geothermal system. Excavating and installing pipe in the parking lot of a large university while school is in session is a unique challenge, especially when the job is as large as this one was. I appreciate your professionalism and the strong work ethic of you and your crew.

– Cheryl Larsen, Assistant Director of Building & Grounds, Garrett-Evangelical Theological Seminary, A division of Northwestern University