Frequent Questions

Although min/max standards do not apply to sulfur, olefins and T90, these parameters are regulated for both conventional and RFG. What tolerances will be available for these parameters?

Under the simple model only oxygen and benzene, and RVP in the case of VOC-controlled RFG, will involve downstream EPA testing for enforcement purposes. EPA has not set enforcement tolerances for standards that apply at the refinery or importer level, such as sulfur, T-90, and olefins. Moreover, enforcement tolerances are only appropriate when measuring for per-gallon or min/max standards. Sulfur, olefins and T-90 are averaging standards. Therefore, EPA does not anticipate issuing enforcement tolerances for sulfur, T-90, or olefins.(7/1/94)

Question and Answer was originally posted at http://www.epa.gov/otaq/regs/fuels/rfg/qa/420r03009.pdf
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