The Sunoco Pipeline litigation to obtain Pennsylvania eminent domain power has consistently resulted in Sunoco arguing that Mariner East 2 is interstate and intrastate. However, the federal regulations concerning such hazardous liquids pipelines state that a pipeline is interstate or intrastate, but not both. Application of the federal regulations strongly appear to define the proposed pipeline as interstate only, so that eminent domain power would be denied per exclusive federal jurisdiction (49 CFR Part 195 – Appendix A) and the definitions of Interstate pipeline and Intrastate pipeline (49 CFR 195.2).