1. Abatech, Inc., PO Box 356, Blooming Glen, PA 18911, US, e-mail: growe@abatech.com
2. Consultant, 15 Quick Stream Pl., The Woodlands, TX 77381, US, e-mail: gking@asphaltscience.com
3. The Asphalt Institute, 2696 Research Park Dr., Lexington, KY 40511, US, e-mail: manderson@asphaltinstitute.org