About the Editors HARRIS R. GREENBERG, P.E., is Manager of Plant Safety Programs in the Environmental Services Division of Stone & Webster Engineering Corporation. Mr.Greenberg is chairman of ASME Safety Division's Facility Safety Committee, as well as member-at-large of its Executive Committee. He holds degrees in Nuclear Engineering and Chemical Engineering from Massachusetts Institute of Technology. JOSEPH J. CRAMER, Ph.D., currently with Brown & Root, Inc., was formerly Program Manager for Stone & Webster Engineering Corporation's Process and Chemical Plant Safety Program. Dr. Cramer has been a member of AIChE for nearly two decades, and is currently chair of its Environmental Division. His Ph.D. degree in Chemical Engineering was earned at Massachusetts Institute of Technology.