Richard TsengRichard Tseng, PhD, PE, specializes in soil dynamics, focusing on the study of the behavior of soil in relation to earthquake and liquefaction potential. He has performed soil studies for buildings, bridges, highways, airports, earth dams, and transmssion and communications towers for over 40 years. These studies include the determination of site classifications used for seismic design considerations. He recently semi-retired as Chief Geotechnical Engineer with Bowser-Morner, Inc., Dayton, Ohio. Read More Read Less