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Responding to Governor, ARB lifts RVP limit of gasoline to 9.0 psi; attempting to bring prices down
8 October 2012
Responding to the directive of California Governor Jerry Brown on Sunday (earlier post), the California Air Resources Board (ARB) will administratively permit gasoline in the state to meet a single RVP (Reid Vapor Pressure) limit of 9.0 psi (the US Federal summertime limit) effective immediately through the end of 31 October.
The action is designed to address the “extreme and unusual fuel supply circumstances” caused by multiple events— e.g., a refinery fire, electricity interruption and pipeline contamination along with planned shutdowns of several refineries and pipelines.
California Reformulated Gasoline (CaRFG) regulations limit, among other properties, the RVP of gasoline in the state. To control evaporative emissions of hydrocarbons, the RVP of summertime gasoline is generally restricted to 7.0 psi. These limits apply through 31 October for most of California, depending upon the air basin. The RVP limit is raised in the wintertime when ozone formation is less of a problem.
All other requirements of the California Reformulated Gasoline regulations, including other fuel properties, specification, record keeping and reported requirements remain in effect.
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