'Residual fuel left in the hose'? What planet is he from, has he ever actually pumped gas?
Another government regulation, pitiful.
And why would the EPA back a study to see if E15 is safe for a vehicle or not, thier mandate is whether E15 is safe for the environment. I gurantee dozens of studies have been conducted by the engine designors and fuel companies and they know for a certanty wherther it is safe for a vehicle, taht is thier job. That is what they do.