Illinois Geotechnical Office:
1016 W. Jackson Blvd
Chicago, Illinois 60607
T: (312) 757-5040
email: illinois@geotill.com
Illinois Geotechnical:
Arlington Heights, Aurora, Berwyn, Bloomington, Bolingbrook, Champaign, Chicago, Cicero,Decatur, Des Plaines, Elgin, Evanston, Hoffman Estates, Joliet, Mount Prospect, Naperville, Normal, Oak Lawn, Oak Park, Orland Park, Palatine, Peoria, Rockford, Schaumburg, Skokie, Springfield, Tinley Park, Waukegan, Wheaton Woodridge