8/
2/
05
Excerpt
from
RACT
portion
of
8­
hr
O3
NAAQS
implementation
rule
 
phase
2
[
from
pp
278
&
279
of
7/
8/
05
redline/
strikeout
version]
[
accounting
for
changes
discussed
8/
2/
05]

Section
183(
c)
of
the
CAA
also
requires
EPA
to
"
revise
and
update
such
documents
[
i.
e.,
CTGs
and
ACTs]
as
the
Administrator
determines
necessary."
As
new
or
updated
EPA
RACT
guidance
becomes
available,
States
should
consider
the
new
information
in
any
RACT
determinations
or
certifications
that
have
not
been
issued
as
of
the
time
such
an
update
becomes
available.
In
addition,
EPA
is
considering
related
recommendations
from
the
Clean
Air
Act
Advisory
Committee
that
were
sent
to
EPA
in
January
2005
in
response
to
the
recent
National
Research
Council
report
on
Air
Quality
Management
in
the
United
States
(
January
2004).
One
of
the
CAAAC
recommendations
is
that
"
for
the
SIPs
States
are
required
to
submit
over
the
next
several
years,
EPA
and
States,
locals,
and
Tribes
should
promote
the
consideration
of
multipollutant
impacts,
including
the
impacts
of
air
toxics,
and
where
there
is
discretion,
select
regulatory
approaches
that
maximize
benefits
from
controlling
key
air
toxics,
as
well
as
ozone,
PM2.5
and
regional
haze."
As
part
of
this
effort,
EPA
intends
in
the
future
to
develop
updated
technology
guidance
with
respect
to
source
categories
emitting
multiple
pollutants
in
large
amounts.
At
this
time,
however,
we
think
it
is
unlikely
that
updated
technology
guidance
will
be
available
in
time
for
the
RACT
SIPs
due
in
2006.
As
new
or
updated
EPA
RACT
guidance
becomes
available
States
should
consider
the
new
information
in
their
RACT
determinations.
States
should
consider
the
updated
guidance
in
any
RACT
determinations
or
certifications
that
have
not
been
issued
as
of
the
time
such
an
update
becomes
available.
In
addition
to
the
ACTs
and
CTGs,
information
developed
as
part
of
the
process
of
determining
BACT,
BART,
LAER,
and
MACT,
can
be
very
useful
in
supplementing
or,
in
some
cases,
substituting
for
information
to
support
a
RACT
determination.
In
the
June
2,
2003
proposal,
we
proposed
several
requirements
with
respect
to
RACT.
For
subpart
1
areas,
we
proposed
several
options.
We
proposed
in
one
option
to
interpret
the
CAA
in
a
manner
similar
to
that
under
subpart
2
by
requiring
areas
covered
under
subpart
1
to
face
different
RACT
requirements
based
on
the
magnitude
of
the
ozone
problem
in
the
area
(
i.
e.,
the
area's
design
value).
In
another
option,
we
proposed
that
RACT
would
be
met
if
the
area
were
able
to
demonstrate
attainment
of
the
standard
as
expeditiously
as
practicable
with
emission
control
measures
in
the
SIP.
We
also
proposed
as
an
early
attainment
incentive
that
RACT
would
be
met
in
an
area
which
.
.
.
