"On toda?s Dakota Midday, a look at the potential effects from a proposed oil refinery in Southeast South Dakota† joining host Paul Guggenheimer in the Vermillion studio is Karen Hall, a Rapid City woman who will be the featured speaker tonight at an informational meeting on the† green energ? refinery Hyperion Resources is planning to build north of Elk Point, S.D. Hall is an environmental engineer who worked for many years at the Flint Hills Resources oil refinery in Rosemount, Minnesota. She has also written a novel called† Unreasonable Ris? about a plot to blow up an oil refinery.