L. W. Ridenhour Jr., is a senior engineer in DuPoint's Petrochemicals Department at the Beaumont, Texas, Plant. Previous DuPont engineering assignments were at the Cape Fear Plant in Wilmington, N.C., and at Savannah River Laboratory in Aiken, S.C. His B.S. and M.S. degrees in mechanical engineering are from Auburn University. He is a member of ASME and NSPE and is a licensed P.E. in Texas and SC.