The Georgetown Fire Co., Inc. was dispatched for a MVA, train vs vehicle. FR-12 advised one pt. no entrapment, but serious injuries. Command 77 went on scene, confirmed FR-12's report and gas was leaking from the vehicle. Eng. 77-2's crew assisted EMS and pulled a protection line for the gas leak. EMS from 75 transported the pt. from the scene to the LZ, where DSP Trooper 2 transported the pt. to Christiana Hospital.