regulation of fuels and fuel additives rfs pathways ii and technical amendments to the rfs 2 standards 38 pages in english . prein this notice of proposed rulemaking epa is proposing amendments to three separate sets of regulations relating to fuels. first epa is proposing to amend certain of the renewable fuels standard rfs2 program regulations. we believe these proposals will facilitate the introduction of new renewable fuels as well as improve implementation of the program. this proposal includes various changes related to biogas including changes related to the revised compressed natural gas cng liquefied natural gas lng pathway and amendments to various associated registration recordkeeping and reporting provisions. this proposed regulation includes the addition of new pathways for renewable diesel renewable naphtha and renewable electricity used in electric vehicles produced from landfill biogas. adding these new pathways will enhance the ability of the biofuels industry to supply advanced biofuels including cellulosic biofuels which greatly reduce the greenhouse gas emissions ghg compared to the petroleum-based fuels they replace. it also addresses nameplate capacity issues for certain production facilities that do not claim exemption from the 20 greenhouse gas ghg reduction threshold. in this notice epa addresses issues related to cro residue and corn kernel fiber and proposes an approach to determining the volume of cellulosic rins produced from various cellulosic feedstocks. we also include a lifecycle analysis of advanced butanol and discuss the potential to allow for commingling of compliant products at the retail facility level as long as the environmental performance of the fuels would not be detrimental. several other amendments to the rfs2 program are included.second epa is also proposing various changes to the e15 misfueling mitigation regulations e15 mmr . among the e15 changes proposed are technical corrections and amendments to sections dealing with labeling e15 surveys product transfer documents and prohibited acts. we also propose to amend the definitions in order to address a concern about the rounding of test results for ethanol content violations. lastly epa is proposing changes to the survey requirements associated with the ultra-low sulfur diesel ulsd program. pre