Alternative Diesel Fuels Applications
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The Alternative Diesel Fuels (ADF) regulation governs the introduction and use of innovative alternative diesel fuels in California, while preserving or enhancing public health, the environment, and the emissions benefits of the existing motor vehicle diesel fuel regulations. The regulation consists of two major parts: 1) a three stage process for ADFs to be introduced into the California market including, if necessary, a determination of mitigation measures needed to ensure no degradation in air quality, and 2) in-use requirements for biodiesel as the first ADF.
The multi-stage process governing the commercialization of new ADFs in California starts with a screening analysis that would allow limited sales of a regulated diesel substitute while it undergoes an initial evaluation (Stage 1); an intermediate stage with expanded sales governed by enhanced monitoring, testing, and a multimedia evaluation (Stage 2); and a final stage with full-scale commercial sales and provisions designed to maintain environmental and public health protections as needed (Stage 3).