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Consideration of proposed regulatory amendments related to
Enhanced Vapor Recovery (EVR) requirements for Aboveground
Storage Tanks (AST) will be delayed until a Board Hearing in the
first half of 2015. The Air Resources Board (ARB or Board) has
issued an amended Regulatory Advisory indicating that the terms
of the current Advisory, which was issued on February 28, 2014,
will remain in effect until the Board considers formal regulatory
amendments next year.

The amended AST EVR Regulatory Advisory is available on ARB's
website: http://www.arb.ca.gov/vapor/vapor.htm.

For further information about the AST EVR Regulatory Advisory or
ARB’s AST EVR program, visit 
http://www.arb.ca.gov/vapor/vapor.htm or call 916-327-0900. 

Background: 
In 2008, the Board adopted EVR standards to reduce air pollution
from AST.  Owners and operators of AST are required to install
EVR equipment to reduce the emission of gasoline vapors caused by
daily changes in ambient temperature and exposure to sunlight
(Standing Loss Control, or SLC) as well as vapors that are
emitted during the transfer of gasoline from the cargo tanker to
the AST (Phase I) and then from the AST to the motor vehicle
(Phase II).  Under the statewide regulation, new AST have been
required to have SLC equipment since April 1, 2009, and Phase I
equipment since July 1, 2010.  For existing AST located in state
ozone non-attainment areas, SLC has been required since April 1,
2013, and Phase I equipment will be required by July 1, 2014. 
Installation deadlines for Phase II equipment have not yet been
established due to a lack of certified equipment.

Based on recent analysis, ARB staff has determined that in some
situations the costs associated with implementation of Phase I
equipment are higher than originally anticipated, particularly
for AST with low gasoline throughput which are in many cases
located in rural areas.  To allow for more cost-effective
implementation of AST EVR requirements, ARB staff will ask the
Board in 2015 to consider regulatory amendments that would exempt
certain ASTs from compliance with SLC and Phase I requirements. 
In the interim, to ensure that owners/operators do not
unnecessarily expend funds to upgrade ASTs that may ultimately be
exempt under the amendments that ARB staff will be proposing, ARB
will request air districts to not enforce the July 1, 2014
compliance deadline for those AST owners/operators who may not be
required to comply under the nine step process laid out in the
AST EVR Regulatory Advisory.  




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