A method for starting and operating a non-methane hydrocarbon ("NMHC") fueled gas turbine combined cycle power plant , the method comprising: injecting gaseous NMHC fuel into a gaseous NMHC fuel treatment system ; injecting at least one of auxiliary steam , heat recovery steam generator ("HRSG") steam , or HRSG water into the gaseous NMHC fuel treatment system ; mixing the at least one of auxiliary steam , HRSG steam , or HRSG water with the gaseous NMHC fuel in the NMHC fuel treatment system to form a gaseous NMHC fuel mixture ; injecting the gaseous NMHC fuel mixture into a gaseous NMHC fuel distribution system ; and providing the gaseous NMHC fuel mixture through the gaseous NMHC fuel distribution system to a combustor of the NMHC fueled gas turbine ; the method further comprising supplying liquid NMHC fuel to a liquid NMHC fuel treatment system , or supplying liquid non-NMHC fuel to a liquid non-NMHC fuel treatment system ; wherein supplying liquid NMHC fuel to a liquid NMHC fuel treatment system comprises: injecting the liquid NMHC fuel from the liquid NMHC fuel treatment system into a liquid NMHC fuel distribution system ; and providing the liquid NMHC fuel through the liquid NMHC fuel distribution system to the combustor ; and wherein supplying liquid non-NMHC fuel to a liquid non-NMHC fuel treatment system comprises: injecting the liquid non-NMHC fuel from the liquid non-NMHC fuel treatment system into a liquid non-NMHC fuel distribution system ; and providing the liquid non-NMHC fuel through the liquid non-NMHC fuel distribution system to the combustor . injecting gaseous NMHC fuel into a gaseous NMHC fuel treatment system ; injecting at least one of auxiliary steam , heat recovery steam generator ("HRSG") steam , or HRSG water into the gaseous NMHC fuel treatment system ; mixing the at least one of auxiliary steam , HRSG steam , or HRSG water with the gaseous NMHC fuel in the NMHC fuel treatment system to form a gaseous NMHC fuel mixture ; injecting the gaseous NMHC fuel mixture into a gaseous NMHC fuel distribution system ; and providing the gaseous NMHC fuel mixture through the gaseous NMHC fuel distribution system to a combustor of the NMHC fueled gas turbine ; the method further comprising supplying liquid NMHC fuel to a liquid NMHC fuel treatment system , or supplying liquid non-NMHC fuel to a liquid non-NMHC fuel treatment system ; wherein supplying liquid NMHC fuel to a liquid NMHC fuel treatment system comprises: injecting the liquid NMHC fuel from the liquid NMHC fuel treatment system into a liquid NMHC fuel distribution system ; and providing the liquid NMHC fuel through the liquid NMHC fuel distribution system to the combustor ; and wherein supplying liquid non-NMHC fuel to a liquid non-NMHC fuel treatment system comprises: injecting the liquid non-NMHC fuel from the liquid non-NMHC fuel treatment system into a liquid non-NMHC fuel distribution system ; and providing the liquid non-NMHC fuel through the liquid non-NMHC fuel distribution system to the combustor . injecting the liquid NMHC fuel from the liquid NMHC fuel treatment system into a liquid NMHC fuel distribution system ; and providing the liquid NMHC fuel through the liquid NMHC fuel distribution system to the combustor ; and wherein supplying liquid non-NMHC fuel to a liquid non-NMHC fuel treatment system comprises: injecting the liquid non-NMHC fuel from the liquid non-NMHC fuel treatment system into a liquid non-NMHC fuel distribution system ; and providing the liquid non-NMHC fuel through the liquid non-NMHC fuel distribution system to the combustor . injecting the liquid non-NMHC fuel from the liquid non-NMHC fuel treatment system into a liquid non-NMHC fuel distribution system ; and providing the liquid non-NMHC fuel through the liquid non-NMHC fuel distribution system to the combustor . <EOS>