M. Darryl Yoes is the founder and President of Safety Consulting International, LLC, with more than 50 years of refinery supervisory and management experience. He served as emergency coordinator and incident manager as Refinery Superintendent and has authored three other Wiley-published textbooks on safe petroleum and petrochemical plant operations. He currently leads Safe Operations Training for petroleum refineries and petrochemical plants and develops process operations and environmental procedures for EcoScience Resource Group, LLC.