An engineering and economic assessment report of the installation and operation of various technologies, in retrofit and new-build applications, at California utility-scale NGCC plants, or if a suitable NGCC plant cannot be identified, an alternative natural gas-fired system. If a suitable NGCC plant cannot be determined because of technical or other reasons, the awarded contractor shall recommend a replacement natural gas system (i.e., a natural gas fired cogeneration/oilfield steam flood unit) for the detailed analysis and pilot demonstration elements of this RFP.