1Technical
Support
Document
for
the
Final
Clean
Air
Interstate
Rule:
Air
Quality
Modeling
(
Docket
No.
OAR­
2003­
0053­
2151).

2Clean
Air
Interstate
Rule
Emissions
Inventory
Technical
Support
Document
(
Docket
No.
OAR
2003­
0053­
2047).

3Contents
of
CAIR
Updated
Modeling
Platform
Disk
Drive
(
Docket
No.
OAR­
2003­
1688).
Disk
Drive
Containing
Emissions
Input
Data
Sets
and
Model
Outputs
for
the
CAIR
Revised
Modeling
of
the
Contribution
from
Minnesota
to
PM2.5
Nonattainment
in
Downwind
States
Below
is
a
listing
of
the
modeling
data
from
the
revised
Minnesota
PM2.5
contribution
modeling
which
EPA
is
providing
on
a
disk
drive
in
the
Clean
Air
Interstate
Rule
(
CAIR
docket).
This
revised
analysis
for
Minnesota
includes
modeling
using
the
CAIR
PM2.5
air
quality
modeling
platform
as
described
in
the
CAIR
air
quality
modeling
technical
support
document1
and
the
emissions
inventory
technical
support
document2
coupled
with
updated
future
year
2010
emissions
from
utility
sources
in
Minnesota.
The
updated
2010
utility
emissions
for
Minnesota
and
the
results
of
the
revised
modeling
are
described
in
the
CAIR
Notice
of
Reconsideration
(
December
2005)
.

The
revised
Minnesota
PM2.5
modeling
data
are
also
available
for
download
from
the
following
ftp
site:
ftp://
www.
airmodelingftp.
com/
under
the
directory
CAIR_
Petition_
Reconsideration_
Minnesota
Please
contact
Peter
Eckhoff:
eckhoff.
peter@
epa.
gov
for
access
to
this
ftp
site.

The
data
disk
drive
includes
the
following
data
sets
Emissions:
model­
ready
emissions
input
files
(
one
file
per
day
containing
hourly
3­
dimensional
gridded
emissions)
for
each
of
three
scenarios
used
in
the
revised
Minnesota
modeling
(
1)
2001
Base
Year
emissions
(
2001ad_
2)
(
2)
2010
Base
Case
emissions
(
2010af_
2)
(
3)
2010
Minnesota
Zero­
Out
emissions
(
2010af_
2_
zMN)

Model
Outputs:
Two
types
of
concentration
output
files
from
simulations
of
the
Community
Multiscale
Air
Quality
Model
(
CMAQ).
(
1)
Hourly
layer
1
gridded
concentrations
(
ACONC
files)
(
2)
Daily
average
layer
1
gridded
concentration
files
(
dailyavg.
aconc
files)

Note
that
EPA
runs
annual
simulations
of
CMAQ
in
3­
month
(
i.
e.
quarterly)
segments
(
e.
g.,
January,
February,
and
March
is
the
first
segment
of
the
year).
There
is
a
10­
day
ramp­
up
(
i.
e.,
model
initialization)
period
for
each
segment.
The
CMAQ
outputs
for
the
ramp­
up
days
are
included
on
the
disk
drive
but
were
not
included
in
the
PM2.5
contribution
analysis.
The
emissions
inputs
for
December
22
­
31,
2000,
which
is
the
ramp­
up
period
for
the
first
quarterly
model
run,
are
also
included
on
the
disk
drive.

The
non­
emissions
inputs
(
e.
g.,
meteorological
inputs)
which
EPA
used
to
run
CMAQ
for
the
revised
Minnesota
modeling
are
available
on
a
separate
disk
drive
in
the
CAIR
docket3.
These
data
can
also
be
downloaded
from
the
cair_
noda
directory
at
the
above
air
modeling
ftp
site.

In
addition,
EPA
will
provide,
on
request,
copies
of
the
CAIR
modeling
input
and
output
files,
model
run
scripts,
and
pre­
and
post­
processing
code
on
user­
provided
disk
drive(
s).
Please
email
Norm
Possiel
at
possiel.
norm@
epa.
gov
regarding
any
such
requests.
