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Acceptable
- This designation means that a substitute may be
used, without restriction, to replace the relevant
ODS within the end-use specified. For example,
HCFC-22 is an acceptable substitute for R-502 in
industrial process refrigeration. Note that all SNAP
determinations apply to the use of a specific product
as a substitute for a specific
ODS in a specific
end-use.
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Acceptable Subject to Use Conditions
- This designation means that a substitute would be
unacceptable unless it is
used under certain conditions. An example is the set
of use conditions placed on
motor
vehicle air conditioning refrigerants, requiring
the use of unique fittings and labels and requiring
that the original refrigerant be removed before
charging with an alternative. Use of the substitute
in the end-use is legal provided the conditions are
fully met. Note that all SNAP determinations apply to
the use of a specific product as a substitute for a
specific
ODS in a specific
end-use.
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Acceptable Subject to Narrowed Use Limits
- This designation indicates means that a
substitute would be
unacceptable unless its
use was restricted to specific
applications within an
end-use. This designation is generally used when the
specific characteristics of different applications
within an end-use result in differences in risk. Use
of the substitute in the end-use is legal only in
those applications included within the narrowed use
limit. Note that all SNAP determinations apply to the
use of a specific product as a substitute for a
specific
ODS in a specific
end-use.
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Application
- The most specific category of equipment. This
description is generally used in
sectors where the
end-uses are fairly broad. In
order of increasing specificity, a particular system
is part of an
industrial use sector, an
end-use, and an application.
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End-use
- Processes or classes of specific applications
within major industrial sectors where a substitute is
used to replace an ozone-depleting substance. The
specific definition varies by sector, but examples
are motor vehicle air conditioning, electronics
cleaning, flooding fire extinguishing systems, and
polyurethane integral skin foam. Substitutes are
listed by end-use in the
SNAP lists. In order
of increasing specificity, a particular system is
part of an
industrial use sector, an
end-use, and an
application.
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Exceptions
- Companies manufacturing substitutes outside the
U.S. who are producing solely for use by entities
outside the U.S. are not subject to the requirements
under SNAP.
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Industrial Use Sector
- A user community that uses an
ozone-depleting
substance in similar ways. SNAP reviews
substitutes in nine sectors:
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- In order of increasing specificity, a particular
system is part of an industrial use sector, an
end-use, and an
application.
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Pending
- This designation indicates those substitutes
which the Agency is currently reviewing, but for
which a final determination cannot yet be made due to
outstanding data requirements or incomplete
information in order for the Agency to complete a
risk assessment.
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Unacceptable
- This designation means that it is illegal to use
a product as a substitute for an ODS in a specific
end-use. For example, HCFC-141b is an unacceptable
substitute for CFC-11 in building chillers. Note that
all SNAP determinations apply to the use of a
specific product as a substitute for a specific
ODS in a specific
end-use.
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Use Restriction
- A general term that includes both
use conditions and
narrowed use limits.
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