/industries/refining/b/weblog/posts/optimizing-blend-operations-in-pursuit-of-regulatory-complianceAs U.S. refiners grapple with the Environmental Protection Agency’s Tier 3 regulations , meeting their blending plans will become even more difficult. In the second webinar of the refining blending series , Emerson’s Dr. Doug White addressed the subjecten-USTelligent Community 13