(Olympia, WA)  --  A consulting firm hired by Governor Jay Inslee says gas prices may rise by two cents a gallon by 2020 and ten cents by 2026 if Washington state adopts a clean-fuels standard.  "The Olympian" reports California-based Life Cycle Associates assumes in its latest draft report that there will be a phase-in of blended fuels over a decade starting in 2017.  The governor says there will be a public process for any steps he takes toward adopting a standard by administrative rule.  The clean-fuels policy is among options being considered by Inslee as he tries to lower emissions to meet targets outlined in state law.