1
Enclosure
2
IDEM's
Preliminary
Assessment
of
the
Fine
Particulate
(
PM
2.5)
Standard
Consistent
with
the
United
States
Environmental
Protection
Agency's
(
USEPA)
April
1,
2003
guidance
memorandum
titled
"
Designations
for
the
Fine
Particulate
National
Ambient
Air
Quality
Standards",
the
Indiana
Department
of
Environmental
Management
(
IDEM)
has
conducted
a
thorough
review
of
the
affected
areas
in
Indiana.
IDEM's
review
focused
on
the
following
primary
and
secondary
analysis
criteria:

Primary
Analysis
Criteria:
1.
Monitoring
data.


The
annual
standard
is
15
micrograms
per
cubic
meter
(
µ
g/
m3)
and
attainment
is
determined
by
the
average
of
the
Particulate
Matter
(
PM)
2.5
values
over
a
three­
year
period.
Due
to
rounding,
values
greater
than
15.0
micrograms
per
cubic
meter
(
µ
g/
m3)
are
considered
to
exceed
the
standard.


The
daily
standard
is
65
micrograms
per
cubic
meter
(
µ
g/
m3)
and
attainment
is
determined
by
taking
the
98th
percentile
of
the
PM
2.5
values
over
a
three­
year
period.
Due
to
rounding,
values
greater
than
65.0
micrograms
per
cubic
meter
(
µ
g/
m3)
are
considered
to
exceed
the
standard.

2.
Existing
MSA/
CMSA
boundaries

Following
the
current
April
2003
guidance,
IDEM's
core
evaluation
is
based
on
the
1999
MSA
boundary
definitions.


The
U.
S.
Office
of
Management
and
Budget
published
revised
MSA
boundary
definitions
on
June
6,
2003.
Therefore,
IDEM
has
done
a
cursory
evaluation
of
the
counties
affected
by
the
new
definitions
and
has
incorporated
the
relevant
information
into
this
evaluation,
as
appropriate.

Secondary
Analysis
Criteria:
1.
Emissions
and
air
quality
in
adjacent
areas
(
including
adjacent
MSAs/
CMSAs).
Data
are
available
for
volatile
organic
compounds
(
VOC),
oxides
of
nitrogen
(
NOx),
direct
PM
2.5,
and
sulfur
dioxide
(
SO2).
Ammonia
emissions
inventories
are
not
available
at
this
time.
2.
Population
density
and
degree
of
urbanization
including
commercial
development.
3.
Monitoring
data
representing
ozone
concentrations
in
local
areas
and
larger
areas
(
urban
or
regional
scale)
as
surrogate
for
PM
2.5
where
we
are
not
monitoring
for
PM
2.5.
Location
of
emission
sources.
4.
Traffic
and
commuting
patterns.
5.
Expected
growth.
6.
Meteorology.
7.
Jurisdictional
boundaries,
including
existing
1­
hour
and
proposed
8­
hour
ozone
nonattainment
area
boundaries.
8.
Level
of
control
of
emissions.
9.
Regional
emission
reductions
(
e.
g.,
NOx
SIP
call
or
other
enforceable
regional
strategies).
2
Table
I
outlines
the
MSAs/
CMSAs
and
Indiana
Counties
subjected
to
the
analysis
criteria.
A
map
of
the
affected
Indiana
Counties,
titled
Figure
2,
accompanies
this
document.
Figure
I
summarizes
PM
2.5
monitoring
information.
IDEM's
core
analysis
is
based
on
the
1999
defined
MSA/
CMSA
boundaries.
As
a
result
of
the
2000
Census,
the
2003
MSA/
CMSA
boundary
definitions
were
published
on
June
6,
2003.
IDEM
has
incorporated
a
cursory
review
of
the
counties
affected
by
the
new
boundary
definitions
into
our
core
analysis.

Table
I
Evansville
Area
Other
Potentially
Affected
Areas
Gibson
County
1
Posey
County
Cincinnati
Area
Vanderburgh
County
Dearborn
County
Warrick
County
Franklin
County
1
Ohio
County
Indianapolis/
Central
Indiana
Boone
County
Dubois
County
Brown
County
1
Hamilton
County
Fort
Wayne
Area
Hancock
County
Adams
County
2
Hendricks
County
Allen
County
Johnson
County
DeKalb
County
2
Madison
County
3
Huntington
County
2
Marion
County
Wells
County
Morgan
County
Whitley
County
Putnam
County
1
Shelby
County
Kokomo
Area
Howard
County
Lousiville
Area
Tipton
County
Clark
County
Floyd
County
Lafayette
Area
Harrison
County
Benton
County
1
Scott
County
2
Carroll
County
1
Washington
County
1
Tippecanoe
County
Clinton
County
2
Northwest
Indiana
Muncie
Area
Jasper
County
1
Delaware
County
Lake
County
LaPorte
County
4
Terre
Haute
Area
Newton
County
1
Clay
County
Porter
County
Sullivan
County
Vermillion
County
South
Bend/
Elkhart/
Goshen
Vigo
County
Elkhart
County
St.
Joseph
County
1
County
added
to
MSA
in
June
2003
as
a
result
of
the
2000
Census.
2
County
removed
from
the
MSA
in
June
2003
as
a
result
of
the
2000
Census.
3
County
redefined
as
a
separate
MSA
in
June
2003
as
a
result
of
the
2000
Census.
4County
defined
as
its
own
MSA
in
June
2003
as
a
result
of
the
2000
Census.
3
As
a
result
of
thorough
analysis,
IDEM
has
developed
the
following
evaluation
of
nonattainment
area
boundaries
for
designating
areas
under
the
NAAQS
for
fine
particulate
matter.
This
evaluation
is
based
on
2000­
2002
and
2001
through
2003
monitoring
data.
There
are
no
areas
within
Indiana
that
exceed
the
daily
standard
of
65
micrograms
per
cubic
meter
(
µ
g/
m3).
Therefore
this
analysis
focuses
only
on
the
annual
standard
of
15
micrograms
per
cubic
meter
(
µ
g/
m3).

PM2.5
is
both
emitted
directly
in
particulate
form
by
select
sources
and
is
formed
in
the
atmosphere
by
precursor
gases
from
a
variety
of
sources.
Direct
emissions
come
from
combustion
sources,
such
as
power
plants,
forest
fires
and
vehicle
emissions.
Precursor
gases
include
NOx,
VOCs,
SO2
and
ammonia.
These
gases
come
from
a
variety
of
sources
including
combustion
sources,
mobile
sources,
manufacturing
that
involves
coatings
and
solvents,
and
agriculture.
Precursor
gases
can
condense
into
particles
that
are
made
up
of
varying
amounts
of
NOx,
SO2,
VOCs
and
ammonia.
The
PM
2.5
direct
inventory
estimates
referenced
within
this
document
pertain
solely
to
emissions
from
stationary
sources.

Although
IDEM
has
been
monitoring
coarse
particulates
(
PM
10)
for
some
time,
only
two
relatively
small
geographic
areas
were
affected
by
the
previous
particulate
standard.
PM
2.5
and
PM
10
are
very
different
and
require
separate
monitoring
equipment.
IDEM
established
its
PM
2.5
monitoring
network
in
1999,
following
U.
S.
EPA
guidance
for
site
location,
which
focused
primarily
on
densely
populated
urban
areas.
Much
technical
work
needs
to
be
done
to
better
understand
PM
2.5.
States
and
the
U.
S.
EPA
are
still
working
to
identify
the
local
and
regional
nature
of
PM
2.5
formation,
as
well
as
its
precursors
and
relative
source
contributions.
Therefore,
it
is
difficult
to
develop
conclusions
as
to
how
the
secondary
evaluation
criteria
should
apply
to
PM
2.5
nonattainment
area
considerations.
For
example,
it
is
difficult
to
assume
that
commuting
from
a
county
that
monitors
attainment
to
a
county
that
monitors
values
above
the
standard
significantly
contributes
to
the
PM
2.5
concentrations
in
the
county
that
has
values
above
the
standard.

Also,
based
on
our
data
analysis,
high
PM
2.5
concentrations
appear
to
be
more
prominent
in
areas
where
there
is
high
population
density
or
where
there
is
a
strong
industrial
base.
Current
scientific
evidence,
including
EPA's
modeling
for
the
proposed
Interstate
Air
Quality
Rule
and
the
Lake
Michigan
Air
Directors'
Consortium
technical
analysis,
does
show
there
is
a
large
regional
component
to
PM2.5,
in
addition
to
a
local
component.
Despite
this
regional
component,
Indiana's
monitors
do
not
show
widespread
violations
of
the
annual
standard.
Many
of
Indiana's
urban
and
suburban
counties
monitor
compliance.
Regional
controls,
such
as
EPA's
proposed
Interstate
Air
Quality
Rule,
should
secure
the
compliance
of
these
counties
into
the
future.
4
As
noted
in
this
document,
three
PM
2.5
monitoring
sites
produced
data
that
is
deemed
incomplete,
meaning
that
a
2001­
2003
average
value
cannot
be
determined.
EPA's
monitoring
guidance
stipulates
that
a
minimum
of
75%
of
the
data
per
quarter
must
be
available
in
order
to
determine
if
the
design
value
represents
attainment.
If
less
than
75%
of
the
data
is
valid,
then
the
maximum
quarterly
value
for
that
given
quarter
over
the
three­
year
period
is
substituted
for
all
missing
samples
for
that
quarter.
This
method
is
obviously
a
very
conservative
methodology
for
calculating
an
average
value.
In
determining
whether
a
monitor
with
incomplete
data
attains
the
PM
2.5
standard,
EPA
encourages
states
to
explore
alterative
methods
for
evaluating
the
data.
As
noted
in
this
document,
IDEM
has
done
this
for
the
Madison,
Delaware,
and
Tippecanoe
County
monitor
sites.

There
is
one
further
thing
to
note
about
Indiana's
PM
2.5
monitoring
network.
IDEM
maintains
four
monitoring
sites
that
are
intended
to
reflect
air
quality
in
a
relatively
small
geographic
area
directly
influenced
by
a
specific
source
or
sources
of
air
pollution.
The
data
from
these
sites
are
not
intended
to
be
used
to
determine
nonattainment
status
for
the
annual
PM
2.5
standard.
IDEM
has
included
the
monitored
annual
values
from
these
sites
in
Figure
1
to
Enclosure
1
and
we
note
that
the
monitors
are
in
compliance
with
the
daily
standard,
but
not
in
compliance
with
the
annual
standard.
IDEM
will
work
with
the
sources
to
address
emissions
that
are
contributing
to
the
high
annual
values
at
these
sites.

IDEM
Analysis
by
Region
Evansville
Area:
Indiana
Counties
within
the
Area:
Gibson,
Posey,
Vanderburgh,
and
Warrick.

EPA
Proposed
8­
hour
Ozone
Nonattainment
Area:
Vanderburgh
and
Warrick
Counties
Monitor
Values
(
average
value
in
micrograms
per
cubic
meter):

COUNTY
MONITOR
LOCATION
2000­
2002
AVERAGE
VALUE
2001­
2003
AVERAGE
VALUE
Vanderburgh
Civic
Center
15.7
15.2
Vanderburgh
Fire
Station
#
17
15.5
15.2
Vanderburgh
University
of
Evansville
15.7
15.5
Evaluation:
County
Feb
15,
2004
Preliminary
Designation
Recommendations
Gibson
Attainment/
Unclassifiable
Posey
Attainment/
Unclassifiable
Vanderburgh
Nonattainment
Warrick
Attainment/
Unclassifiable
5
Discussion:
There
are
three
PM
2.5
monitors
within
the
MSA
and
they
are
all
located
in
Vanderburgh
County.
All
three
monitors
in
Vanderburgh
County
exceed
the
standard.
Although
urban
growth
is
occurring
in
Warrick
and
Gibson
counties,
the
majority
of
the
region's
vehicle
miles
traveled
and
traffic
congestion
is
generated
within
the
core
urban
area
in
Vanderburgh
County.
Vanderburgh
County
has
the
highest
population
density
and
maintains
an
in­
county
workforce
ratio
of
94%.
Warrick
County
has
the
second
highest
population
density
and
has
an
in­
county
workforce
ratio
of
51%.
Posey
County
maintains
low
population
density
and
has
less
of
an
emissions
base
than
the
other
counties
within
the
region.

Half
(
50%)
of
all
of
the
VOCs
(
Volatile
Organic
Compounds)
emitted
annually
within
Indiana's
portion
of
the
MSA
derive
from
Vanderburgh
County.
The
total
Nitrogen
Oxide
(
NOx)
emissions
of
the
area
derive
primarily
from
Gibson
(
47%)
and
Warrick
(
28%)
counties.
The
majority
(
75%)
of
the
area's
direct
PM
2.5
emissions
from
stationary
sources
originate
in
Warrick
County.
The
sulfur
dioxide
(
SO2)
emissions
released
by
stationary
sources
within
Indiana's
portion
of
the
MSA
are
primarily
from
Warrick
(
42%)
and
Gibson
(
52%)
counties.
However,
based
on
wind
rose
analysis,
neither
county
is
upwind
of
Vanderburgh;
Gibson
is
north
of
Vanderburgh
and
Warrick
is
east.
Thus,
neither
county
is
likely
to
contribute
significantly
to
PM
2.5
values
in
Vanderburgh
County.
Rural
background
monitors
are
located
east
of
Warrick
County
in
Spencer
County
and
North
of
Gibson
County
in
Knox
County.
To
a
significant
degree,
these
monitors
receive
air
masses
that
have
just
crossed
the
state
line.
These
have
design
values
of
14.4
and
13.9,
respectively,
indicating
high
background
levels
coming
into
the
area,
despite
being
below
the
standard.
These
values
also
are
an
indication
that
PM
values
in
the
neighboring
counties
(
i.
e.
Warrick
and
Gibson)
would
likely
be
below
the
standard
if
monitors
were
present.
The
2002
to
2003
design
values
have
dropped
and
NOx
emissions
are
expected
to
decrease
throughout
the
Midwest
over
the
next
few
years
due
to
the
NOx
SIP
Call
and
new
federal
engine
and
fuel
standards.
It
is
reasonable
to
expect
the
PM
2.5
design
values
in
Vanderburgh
County
to
continue
to
go
down,
possibly
below
the
standard,
without
additional
controls.
Therefore,
it
is
unnecessary
to
extend
the
restrictions
that
accompany
a
nonattainment
designation
to
additional
counties
at
this
time.

Henderson
County,
Kentucky
is
also
part
of
the
Evansville
MSA
and
Indiana
has
and
will
continue
to
communicate
with
the
State
of
Kentucky
concerning
its
status.

2003
MSA
Revised
Boundary
Definitions:
Gibson
County
was
incorporated
in
the
2003
revised
boundary
definition
for
the
Evansville
MSA.
IDEM
incorporated
Gibson
County
in
its
core
analysis
and
recommends
that
it
be
designated
attainment/
unclassifiable.
6
Central
Indiana
Area:
Indiana
Counties
within
the
Area:
Boone,
Brown,
Hamilton,
Hancock,
Hendricks,
Johnson,
Madison,
Marion,
Morgan,
Putnam,
and
Shelby.

EPA
Proposed
8­
hour
Ozone
Nonattainment
Area:
Boone,
Hamilton,
Hancock,
Hendricks,
Johnson,
Madison,
Marion,
Morgan,
and
Shelby
Counties
Monitor
Values
(
average
value
in
micrograms
per
cubic
meter):

COUNTY
MONITOR
LOCATION
2000­
2002
AVERAGE
VALUE
2001­
2003
AVERAGE
VALUE
Madison
Anderson
15.0
14.6*
Marion
W.
18
th
Street
16.1
15.9
Marion
E.
30
th
Street
17.0
16.2
Marion
E.
75
th
Street
16.1
15.5
Marion
Mann
Road
15.1
14.8
Marion
E.
Michigan
Street
16.9
16.7
*
Data
is
considered
incomplete.

Evaluation:
County
Feb
15,
2004
Preliminary
Designation
Recommendations
Boone
Attainment/
Unclassifiable
Hamilton
Attainment/
Unclassifiable
Hancock
Attainment/
Unclassifiable
Hendricks
Attainment/
Unclassifiable
Johnson
Attainment/
Unclassifiable
Madison
Attainment/
Unclassifiable
Marion
Nonattainment
Morgan
Attainment/
Unclassifiable
Shelby
Attainment/
Unclassifiable
Discussion:
The
only
monitored
violations
of
the
standard
within
the
MSA
occur
in
Marion
County.
Four
of
the
six
monitors
within
the
MSA
exceed
the
standard.
Marion
County
(
Indianapolis)
maintains
the
highest
concentration
for
employment,
VMT,
commerce,
and
recreation
compared
to
the
other
counties
within
the
MSA.
Mobile
source
emissions
represent
the
largest
portion
of
the
VOC
and
NOx
emissions
inventories
for
Marion
County,
as
well
as
for
the
MSA
as
a
whole.
The
majority
of
the
traffic
congestion
is
limited
to
Marion
County.
A
significant
level
of
commuting
occurs
from
the
surrounding
counties
to
Marion
County,
meaning
that
a
fairly
large
portion
of
Marion
County's
VMT
originates
from
the
surrounding
counties.
The
Indianapolis
MSA's
population
density
is
spreading
well
beyond
Marion
County,
but
Marion
County
maintains
the
highest
population
and
an
in­
county
workforce
ratio
of
94%.
Stationary
sources
within
Marion
County
account
for
over
half
(
50%)
of
the
direct
PM
2.5
emissions
from
stationary
sources
within
Central
Indiana
and
the
next
closest
is
Morgan
County
with
11%.
Sources
within
7
Marion
County
also
account
for
70%
of
the
SO2
emissions
from
stationary
sources
within
the
Central
Indiana
Region.
It
is
worth
noting
that
despite
its
large
geographic
size,
the
total
direct
PM2.5
and
SO2
emissions
inventories
for
stationary
sources
within
Central
Indiana
are
relatively
small
in
comparison
with
other
MSAs
within
the
state
(
e.
g.,
NW
Indiana
and
Evansville).

Unlike
ozone,
PM
2.5
monitoring
values
indicate
that
PM
2.5
values
decrease
away
from
the
core
of
the
Indianapolis
urban
area
into
the
suburban
area.
This
is
represented
by
the
lower
values
registered
at
the
Mann
Road
monitor
which
is
Southwest
of
the
core
urban
area
and
by
the
Madison
County
monitor
which
is
Northeast
of
the
core
urban
area.
Both
of
these
monitors
register
values
below
the
standard.
The
monitor
locations
are
aligned
such
that
their
readings
describe
the
profile
of
PM2.5
levels
from
the
urban
edges
through
the
urban
center.
Recent
analysis
by
LADCO
indicates
a
common
"
cone­
shaped"
profile
of
PM
2.5
values
in
densely
populated
urban
areas
with
the
peak
value
at
the
urban
center
(
core)
and
values
decreasing
gradually
based
on
distance
from
the
urban
core
(
both
upwind
and
downwind).
The
Indianapolis
urban
area
appears
to
follow
this
profile,
with
the
peak
value
being
represented
at
the
Michigan
Street
monitor
at
16.7
µ
g/
m3
(
closest
monitor
to
the
center
or
core
of
the
urban
area).
The
W.
18th
Street
monitor
is
just
Northwest
of
the
urban
monitor
alignment;
it
follows
this
"
cone­
shaped"
profile
as
well
at
15.9
µ
g/
m3.
In
projecting
likely
monitor
values
through
radial
extrapolation
(
method
based
on
PM
2.5
concentration
decrease
per
mile
from
the
urban
center,
the
Michigan
St.
monitor
in
this
instance),
the
following
table
illustrates
that
the
actual
and
predicted
monitor
values
indeed
follow
a
"
cone­
shaped"
curve.

Furthermore,
the
predicted
values
based
on
radial
extrapolation
are
very
consistent
with
the
actual
values
for
existing
monitor
sites.
Using
this
same
methodology,
a
calculation
was
made
to
determine
what
the
likely
design
value
would
be
if
a
monitor
was
located
at
the
Hamilton
County
line.
As
the
table
illustrates,
the
projected
value
at
the
Hamilton
County
line
is
below
the
standard.
This
is
significant,
because
if
any
county
outside
of
Marion
were
to
have
a
monitored
value
above
the
standard,
it
would
likely
be
Hamilton
due
to
the
fact
that
it
is
directly
downwind
of
urban
area.
Since
this
exercise
demonstrates
that
the
likely
PM
2.5
concentrations
for
Hamilton
County
are
below
the
standard,
and
this
represents
a
worst­
case
scenario
for
any
of
the
collar
counties,
this
analysis
suggests
that
none
of
the
collar
counties
would
violate
the
standard
if
monitors
were
present.
location
miles
actual
value
predicted
value
Michigan
St.
0
16.7
16.7
Washington
Park
2.7
16.2
16.3
W
18th
4.7
15.9
16
75th
8.2
15.5
15.5
Mann
Rd
10.3
14.8
15.2
Hamilton
Cty
line
11.8
14.9
8
As
noted
previously,
Marion
County
accounts
for
the
majority
of
the
PM
2.5
direct
and
precursor
emissions.
Morgan
County
does
account
for
a
recognizable
portion
of
the
PM
2.5
and
SO2
emissions
within
the
MSA,
however,
IDEM
believes
that
these
emissions
have
little
to
no
effect
on
the
PM2.5
values
in
Marion
County.
This
is
supported
by
the
fact
that
the
closest
downwind
monitor
to
Morgan
County
(
Mann
Rd.)
has
the
lowest
PM
2.5
value
in
Marion
County.
Furthermore,
we
believe
that
including
any
of
the
collar
counties
in
the
nonattainment
area
would
not
lead
to
lower
PM
2.5
values
in
Marion
County.
In
comparing
upwind
background
monitor
values
with
those
registered
outside
the
core
urban
area,
it
appears
that
the
PM
2.5
concentrations
associated
with
urban
excess
is
confined
to
central
Marion
County.
Therefore,
it
is
unnecessary
to
extend
the
restrictions
that
accompany
a
nonattainment
designation
to
additional
counties
at
this
time.

2003
MSA
Boundary
Definition:
The
U.
S.
Office
of
Management
and
Budget
published
revised
MSA
boundary
definitions
on
June
6,
2003.
Brown
and
Putnam
Counties
were
incorporated
as
part
of
the
Indianapolis
MSA
and
Madison
County
was
excluded
from
the
Indianapolis
MSA
and
defined
as
the
Anderson
MSA.
There
are
no
PM
2.5
monitors
in
Brown
or
Putnam
County.
Both
counties
are
fairly
rural
with
low
population
density
and
VMT,
and
neither
county
has
a
significant
emissions
base.
Therefore,
Brown
and
Putnum
Counties
should
be
excluded
from
the
nonattainment
area
as
well.

According
to
EPA
guidance,
monitoring
data
for
the
Madison
County
site
is
considered
incomplete,
though
we
note
that
it
is
just
one
sample
for
one
quarter
short
of
being
complete.
Figure
3.1
attached
to
this
document
provides
a
summary
of
alternate
methods
for
evaluating
the
captured
data.

IDEM
does
not
believe
that
the
substitution
of
the
quarterly
maximum
value
(
worst­
case
scenario)
results
in
a
PM
2.5
value
representative
of
the
PM
2.5
concentrations
registered
at
Madison
County
monitor.
As
noted
in
Figure
3.1,
three
reasonable
data
analysis
methods
indicate
that
the
three­
year
(
2001­
2003)
average
PM
2.5
value
is
below
the
standard.
Additionally,
since
the
critical
value
(
the
quarterly
average
value
required
for
the
three­
year
average
to
exceed
the
standard)
for
the
fourth
quarter
of
2002
is
18.29,
and
no
quarterly
average
during
the
three
year
period
even
approaches
this
critical
value,
we
are
confident
in
stating
that
the
PM
2.5
concentrations
in
Madison
County
are
below
the
standard.
Also
worth
noting
is
that
the
three­
year
average
value
resulting
from
calculation
scenarios
A,
C,
and
D
are
similar
to
the
actual
monitor
value
associated
with
neighboring
Delaware
County
(
14.3).
Since
Madison
County
is
now
its
own
MSA,
we
believe
it
should
be
designated
attainment
and
not
associated
with
Indianapolis.
9
Louisville
Area:
Indiana
Counties
within
the
Area:
Clark,
Floyd,
Harrison,
Scott,
and
Washington
EPA
Proposed
8­
hour
Ozone
Nonattainment
Area:
Clark
and
Floyd
Counties
Monitor
Values
(
average
value
in
micrograms
per
cubic
meter):

COUNTY
MONITOR
LOCATION
2000­
2002
AVERAGE
VALUE
2001­
2003
AVERAGE
VALUE
Clark
Jeffersonville
17.2
16.2
Floyd
New
Albany
15.5
14.9
Evaluation:
County
Feb
15,
2004
Preliminary
Designation
Recommendations
Clark
Nonattainment
Floyd
Attainment
Harrison
Attainment/
Unclassifiable
Scott
Attainment/
Unclassifiable
Washington
Attainment/
Unclassifiable
Discussion:
There
are
only
two
PM
2.5
monitors
within
Indiana's
portion
of
the
MSA
(
one
monitor
in
each
Clark
and
Floyd
Counties).
The
Jeffersonville
site
in
Clark
County
is
the
only
monitor
in
violation
of
the
standard.
Harrison
and
Scott
Counties
are
predominantly
rural
in
nature,
with
low
to
moderate
population
density.
Because
the
majority
of
Clark
and
Floyd
Counties
are
urban,
the
two
counties
account
for
61%
of
the
area's
total
VOC
emissions
and
70%
of
the
area's
NOx
emissions.
Sources
within
Clark
and
Floyd
counties
account
for
88%
of
the
direct
PM
2.5
emissions
from
stationary
sources,
and
100%
of
the
SO2
emissions
from
stationary
sources.
There
are
no
major
stationary
sources
located
within
Harrison
or
Scott
Counties.
Scott
County
in
particular
maintains
a
high
in­
county
workforce
employment
rate
at
67%,
meaning
that
there
is
not
much
commuting
occurring
between
Scott
County
residents
and
the
remainder
of
the
MSA.
Growth
in
Harrison
and
Scott
Counties
has
not
been
significant,
although
there
is
potential
for
new
growth
in
Harrison
County
due
to
recent
commercial
development.
Currently,
Harrison
County
accounts
for
16%
of
the
VOC
emissions
that
comprise
Indiana's
portion
of
the
MSA
and
only
12%
of
the
NOx.
Scott
County
only
accounts
for
13%
of
the
VOC
and
7%
of
the
NOx
emissions
within
the
Indiana
portion
of
the
MSA.
Harrison
and
Scott
counties
account
for
less
than
4%
of
the
direct
PM
2.5
and
SO2
emissions
from
stationary
sources
within
the
Indiana
portion
of
the
MSA.
It
does
not
appear
that
emissions
from
Harrison
or
Scott
Counties
have
a
significant
impact
on
air
quality
within
the
Louisville
MSA.
10
The
difference
between
the
monitor
values
at
the
Jeffersonville
(
Clark
County)
site
and
the
New
Albany
(
Floyd
County)
site
suggests
a
geographically
isolated
spike
in
PM
2.5
concentrations
in
Clark
County.
This
is
further
exemplified
by
the
slightly
lower
PM
2.5
monitor
values
recorded
within
the
urban
core
of
Louisville,
as
it
is
unusual
for
the
highest
value
within
the
urban
area
to
be
outside
of
the
core
county
(
Jefferson,
KY).
This
seems
to
indicate
the
possibility
that
the
isolated
spikes
associated
with
the
Clark
County
monitor
may
be
affected
by
a
local
source
or
sources
within
Clark
County.
There
is
a
power
plant
in
Floyd
County.
However,
it
is
not
known
whether
the
power
plant
is
a
significant
contributor
to
the
Jeffersonville
monitor
value.
Additionally,
this
source
will
be
regulated
by
future
control
requirements
(
e.
g.,
the
Interstate
Air
Quality
Rule)
regardless
of
Floyd
County's
attainment
status.

Air
quality
in
Floyd
County
meets
the
PM
2.5
standard.
According
to
recent
EPA
modeling,
the
entire
Louisville
region
will
attain
the
PM
2.5
standard
upon
the
implementation
of
the
Interstate
Air
Quality
Rule.
Therefore,
it
is
unnecessary
to
extend
the
restrictions
that
accompany
a
nonattainment
designation
to
Floyd
County
at
this
time.
Thus,
IDEM
recommends
that
Clark
County
be
designated
nonattainment
and
Floyd
County
be
designated
attainment.

Since
it
does
not
appear
that
Harrison
and
Scott
Counties
contribute
to
PM
2.5
values
in
the
Louisville
MSA,
IDEM
recommends
Harrison
and
Scott
Counties
be
designated
attainment/
unclassifiable.

2003
MSA
Boundary
Definition:
The
U.
S.
Office
of
Management
and
Budget
published
revised
MSA
boundary
definitions
on
June
6,
2003.
As
a
result,
Scott
County
is
no
longer
part
of
the
MSA,
however,
Washington
County
has
been
incorporated
into
the
revised
boundary
definition
for
the
Louisville
MSA.
The
total
population
of
Washington
County
is
just
under
29,000,
with
an
annual
growth
rate
of
2%,
compared
to
a
total
population
of
172,000
in
Clark
and
Floyd
Counties.
Washington
County
has
an
insignificant
emissions
base
(
i.
e.
2%
of
regional
direct
PM2.5
emissions
and
0%
of
regional
SO2
emissions),
low
population
density
and
low
concentrations
of
VMT.
There
are
no
PM
2.5
monitors
in
Washington
County.
IDEM
recommends
that
Washington
County
be
designated
attainment/
unclassifiable.

Northwest
Indiana:
Indiana
Counties
within
the
Area:
Jasper,
Lake,
Newton,
and
Porter.

EPA
Proposed
8­
hour
Ozone
Nonattainment
Area:
Lake
and
Porter
Counties
11
Monitor
Values
(
average
value
in
micrograms
per
cubic
meter):

COUNTY
MONITOR
LOCATION
2000­
2002
AVERAGE
VALUE
2001­
2003
AVERAGE
VALUE
Lake
East
Chicago
15.6
15.2
Lake
Gary
Federal
Building
16.1*
Lake
Gary
Ivanhoe
School
15.2
14.8
Lake
Hammond
Purdue
Univ
Calumet
15.0
14.9
Lake
Hammond
Robertsdale
Clark
HS
14.9
14.9
Lake
Highland
14.6
14.6
Porter
Dunes
Lake
Shore
13.5
13.4
Porter
Ogden
Dunes
WWTP
14.3
13.8
*
1999
 
2001
Average
Evaluation:
County
Feb
15,
2004
Preliminary
Designation
Recommendations
Jasper
Attainment/
Unclassified
Lake
Nonattainment
Newton
Attainment/
Unclassified
Porter
Attainment
Discussion:
The
only
monitored
violation
of
the
standard
within
the
CMSA
occurs
in
Lake
County,
at
one
of
the
five
monitors
(
East
Chicago).
Due
to
on­
site
electrical
work
associated
with
refurbishing,
the
monitor
at
the
Gary
Federal
Building
was
shut
down
on
September
20,
2002
making
that
year
incomplete,
however,
the
1999
through
2001
data
were
compared
against
the
standard.
Once
refurbishing
of
the
Gary
Federal
Building
is
complete,
it
is
uncertain
as
to
whether
the
PM
2.5
monitor
will
be
reactivated.
Nevertheless,
there
are
a
number
of
PM
2.5
monitoring
sites
nearby
providing
data
representative
of
the
area.

Lake
and
Porter
Counties
comprise
the
Gary
PMSA,
which
is
Indiana's
portion
of
the
greater
Chicago
CMSA.
Lake
County
accounts
for
the
greatest
level
of
employment
and
commerce
within
the
region.
Lake
County
also
maintains
the
highest
population
and
an
incounty
workforce
ratio
of
83%.
Lake
County
does
have
a
greater
amount
of
VMT
compared
to
Porter
County.
Over
25,000
people
drive
into
or
through
Lake
County
from
Porter
County
to
work.
This
accounts
for
a
very
small
portion
of
Lake
County's
total
VMT.
Lake
County
accounts
for
three
times
more
total
VOC
and
30%
more
total
NOx
than
Porter
County.
Also,
Lake
County
accounts
for
70%
of
the
total
direct
PM
2.5
emitted
by
stationary
sources
and
60%
of
the
SO2
emitted
by
stationary
sources.
12
Only
one
monitor
in
the
three­
county
Northwest
Indiana
Region
violates
the
standard.
The
values
in
these
northern
Indiana
areas,
unlike
ozone,
are
significantly
lower
than
those
found
in
south
and
central
Indiana
areas.
Although
these
counties
have
high
PM2.5
direct
emissions,
this
does
not
translate
to
high
monitor
readings,
indicating
that
direct
PM2.5
emissions
are
not
a
significant
contributor
to
the
local
values.
Wind
rose
analysis
indicates
that
Porter
County
is
not
a
contributor
to
Lake
County
PM
2.5
values.
Since
Porter
County
is
upwind
of
LaPorte
County,
and
LaPorte
County's
monitor
values
are
well
below
the
standard,
Porter
County
does
not
appear
to
be
contributing
to
PM
2.5
values
anywhere
within
the
region.
With
a
high
value
of
only
15.2
µ
g/
m3,
it
is
reasonable
to
assume
that
Lake
County
should
attain
the
standard
with
the
implementation
of
regional
controls.
However,
if
local
controls
are
necessary,
the
implementation
of
local
controls
beyond
Lake
County
will
not
impact
PM
2.5
values
within
Lake
County.
Therefore,
IDEM
recommends
that
Lake
County
be
designated
attainment,
and
Porter
County
attainment.

2003
MSA
Boundary
Definition:
The
U.
S.
Office
of
Management
and
Budget
published
revised
MSA
boundary
definitions
on
June
6,
2003.
As
a
result,
Jasper
and
Newton
Counties
have
been
incorporated
into
the
revised
boundary
definition
for
the
Chicago
CMSA
(
Gary
PMSA).
The
total
population
of
Newton
County
is
just
over
15,000,
and
the
total
population
of
Jasper
County
is
just
over
30,000.
Total
NOx
and
VOC
emissions
released
in
Jasper
are
32,000
tons
combined
while
total
NOx
and
VOC
emissions
released
within
Newton
County
are
less
than
3,000
tons
for
each
pollutant,
compared
to
20,000
tons
of
VOC
and
49,000
tons
of
NOx
(
79,000
combined)
emitted
within
Lake
and
Porter
Counties.
Newton
County
accounts
for
0%
of
the
direct
PM
2.5
and
SO2
emissions
released
by
stationary
sources
within
the
region.
Jasper
County
accounts
for
just
8%
of
the
direct
PM
2.5
and
32%
of
the
SO2
emissions
released
by
stationary
sources
within
the
new
PMSA.
Jasper
and
Newton
Counties
both
have
low
population
density
and
low
concentrations
of
VMT.
There
are
no
PM
2.5
monitors
in
Jasper
or
Newton
Counties.
IDEM
recommends
that
Jasper
and
Newton
Counties
be
designated
attainment/
unclassifiable.

Michigan
City/
LaPorte
Area:
Indiana
Counties
within
the
Area:
LaPorte
EPA
Proposed
8­
hour
Ozone
Nonattainment
Area:
LaPorte
Monitor
Values
(
average
value
in
micrograms
per
cubic
meter):

COUNTY
MONITOR
LOCATION
2000­
2002
AVERAGE
VALUE
2001­
2003
AVERAGE
VALUE
LaPorte
Michigan
City
13.6
13.4
LaPorte
LaPorte
13.4
13.6
13
Evaluation:
County
February
15,
2004
Designation
Recommendation
LaPorte
Attainment
Discussion:
LaPorte
County
monitor
values
are
well
below
the
standard.
Based
on
monitor
values
within
its
neighboring
counties
of
Porter
and
St.
Joseph,
it
does
not
appear
that
LaPorte
County
is
contributing
to
any
nearby
areas
with
violating
monitors.
Therefore,
IDEM
recommends
that
LaPorte
County
be
designated
attainment.

South
Bend/
Elkhart/
Goshen
Area:
Indiana
Counties
within
the
Area:
Elkhart
MSA:
Elkhart
County
South
Bend
MSA:
St.
Joseph
County
EPA
Proposed
8­
hour
Ozone
Nonattainment
Area:
Elkhart
and
St.
Joseph
Counties
Monitor
Values
(
average
value
in
micrograms
per
cubic
meter):

COUNTY
MONITOR
LOCATION
2000­
2002
AVERAGE
VALUE
2001­
2003
AVERAGE
VALUE
Elkhart
Elkhart
Pierre
Moran
School
15.5
15.2
St.
Joseph
South
Bend
Children's
Hospital
Grounds
14.4
14.3
St.
Joseph
South
Bend
Lasalle
High
School
14.1
14.0
St.
Joseph
South
Bend
Nuner
Elementary
School
14.0
14.0
Evaluation:
County
Feb
15,
2004
Preliminary
Designation
Recommendations
Elkhart
Nonattainment
St.
Joseph
Attainment
Discussion:
The
monitor
located
in
Elkhart
County
is
the
only
monitor
within
the
region
that
exceeds
the
standard.
Values
for
all
three
monitors
located
within
St.
Joseph
County
are
well
below
the
standard.
Elkhart
County
accounts
for
the
majority
of
the
region's
NOx
and
VOC
emissions
from
stationary
sources.
St.
Joseph
County
accounts
for
46%
of
the
direct
PM
2.5
and
98%
(
4,731
tons)
of
the
SO2
emissions
from
stationary
sources.
A
relatively
equal
amount
of
traffic
volume
and
congestion
occurs
in
St.
Joseph
and
Elkhart
Counties.
St.
Joseph
County
maintains
the
highest
population
and
an
in­
county
workforce
ratio
of
94%.
Elkhart
County's
growth
rate
is
twice
that
of
St.
Joseph
County
and
it
maintains
an
incounty
workforce
ratio
of
90%.
St.
Joseph
and
Elkhart
Counties
are
under
the
jurisdiction
of
a
single
Metropolitan
Planning
Organization
and
are
within
the
same
Transportation
Management
Area.
14
The
Elkhart
monitor
value
of
15.2
µ
g/
m3
is
marginally
above
the
standard.
It
is
reasonable
to
assume
that
regional
controls
such
as
the
NOx
SIP
call
and
low
sulfur
fuels
will
likely
reduce
PM
2.5
concentrations
to
enable
Elkhart
County
to
attain
the
standard
in
a
timely
manner.
Although
emissions
from
St.
Joseph
County
may
slightly
impact
PM
2.5
values
in
Elkhart
County,
IDEM
does
not
feel
that
there
is
a
significant
impact.
Additionally,
it
does
not
appear
that
there
will
be
a
need
for
local
controls
in
either
St.
Joseph
or
Elkhart
Counties.
Therefore,
IDEM
recommends
that
Elkhart
County
be
designated
nonattainment
and
St.
Joseph
County
attainment.

Other
Counties:
Counties
Affected:
Dubois
County
Monitor
Values
(
average
value
in
micrograms
per
cubic
meter):

COUNTY
MONITOR
LOCATION
2000­
2002
AVERAGE
VALUE
2001­
2003
AVERAGE
VALUE
Dubois
Jasper
16.7
16.2
Evaluation:
County
Feb
15,
2004
Preliminary
Designation
Recommendations
Dubois
Nonattainment
Discussion:
The
lone
monitor
located
in
Dubois
County
exceeds
the
standard.
Dubois
County
is
rural
and
it
maintains
very
low
population
density.
Dubois
County
also
maintains
a
high
incounty
workforce
ratio
of
94%.
The
VOC
inventory
for
stationary
sources
in
Dubois
County
is
rather
significant,
however,
the
NOx,
direct
PM
2.5,
and
SO2
inventories
are
relatively
small
(
insignificant).
The
PM
2.5
background
monitor
in
Spencer
County
(
upwind
of
Dubois
County)
does
maintain
annual
monitor
values
below
the
standard,
suggesting
that
there
may
be
more
of
a
local
than
regional
effect
on
values
registered
at
the
Dubois
County
site.
There
is
a
concentration
of
wood
furniture
manufacturers
in
Dubois
County
in
the
vicinity
of
the
monitor
site.
However,
it
is
unclear
at
this
time
whether
emissions
from
these
industries
contribute
significantly
to
PM
2.5
monitor
values
in
Dubois
County.

Other
Potentially
Affected
Areas:

Cincinnati
Area
Counties
Affected:
Cincinnati
Area:
Dearborn
and
Ohio
Counties
EPA
Proposed
8­
hour
Ozone
Nonattainment
Area:
Cincinnati
Area:
Dearborn
County
15
Monitor
Values
:
No
monitor
in
Dearborn
or
Ohio
Counties
Evaluation:
County
Feb
15,
2004
Preliminary
Designation
Recommendations
Dearborn
Attainment/
Unclassifiable
Franklin
Attainment/
Unclassifiable
Ohio
Attainment/
Unclassifiable
Discussion:
There
are
no
PM
2.5
monitors
in
Dearborn
or
Ohio
County.
There
is
only
one
significant
stationary
source
in
Indiana's
portion
of
the
Cincinnati
Consolidated
MSA
(
CMSA),
which
is
the
Tanners
Creek
power
plant.
Dearborn
and
Ohio
Counties
combined
account
for
just
2.33%
of
the
total
population
within
the
CMSA.
The
Tanners
Creek
power
plant
has
reduced
its
emissions
in
recent
years
by
installing
permanent
combustion
controls
to
address
requirements
associated
with
Title
IV
and
the
NOx
SIP
Call.
This
facility
has
installed
low­
NOx
burners
on
three
of
its
four
units,
and
over­
fire
air
on
the
fourth,
largest
unit.
From
1999
to
2002,
annual
NOx
emissions
from
this
facility
have
been
reduced
by
over
20,000
tons
(
60%
decrease).

If
monitors
were
located
in
Dearborn
or
Ohio
County,
it
is
reasonable
to
assume
that
the
values
would
be
consistent
with
background
values
elsewhere
in
the
state
and
Midwest.
Therefore,
IDEM
does
not
believe
that
PM
2.5
concentrations
exceed
the
standard
in
Dearborn
or
Ohio
County.
Additionally,
based
on
analysis
of
similar
urban
areas,
IDEM
does
not
believe
that
emissions
from
Dearborn
and
Ohio
Counties
contribute
significantly
to
PM
2.5
values
elsewhere
in
the
Cincinnati
CMSA.
For
example,
Morgan
County
is
an
upwind
county
within
the
Indianapolis
MSA
and
it
contains
a
power
plant.
The
closest
downwind
monitor
within
the
core
county
(
Marion)
maintains
a
value
below
the
standard,
illustrating
that
emissions
from
Morgan
County
are
unlikely
contributing
to
the
values
in
Marion
County.
IDEM
feels
it
reasonable
to
assume
that
the
same
would
stand
true
with
regard
to
Dearborn
and
Ohio
Counties'
impact
on
values
within
the
Cincinnati
CMSA.
Furthermore,
since
urban
excess
seems
to
be
apparent
in
the
core
of
the
Cincinnati
CMSA,
and
neither
Dearborn
or
Ohio
Counties
are
in
the
core,
nor
contribute
significantly
to
the
urban
excess,
IDEM
recommends
that
Dearborn
and
Ohio
Counties
be
designated
attainment/
unclassifiable.

Franklin
County
was
added
to
the
Cincinnati
CMSA
following
the
2000
Census.
This
is
a
rural
county
with
low
population
density
and
VMT,
and
an
insignificant
emissions
base.
Therefore,
IDEM
recommends
that
Franklin
County
be
designated
attainment/
unclassifiable
as
well.
16
Fort
Wayne
Area:
Fort
Wayne
Area:
Adams,
Allen,
DeKalb,
Huntington,
Wells,
Whitley
Counties
EPA
Proposed
8­
hour
Ozone
Nonattainment
Area:
Fort
Wayne
Area:
Allen,
Huntington
Counties
Monitor
Values
(
average
value
in
micrograms
per
cubic
meter):

COUNTY
MONITOR
LOCATION
2000­
2002
AVERAGE
VALUE
2001­
2003
AVERAGE
VALUE
Allen
Fort
Wayne
Beacon
St
14.8
14.3
Allen
Fort
Wayne
Taylor
University
14.2
14.0
Evaluation:
County
Feb
15,
2004
Preliminary
Designation
Recommendations
Adams
Attainment/
Unclassifiable
Allen
Attainment
DeKalb
Attainment/
Unclassifiable
Wells
Attainment/
Unclassifiable
Whitley
Attainment/
Unclassifiable
Discussion:
The
only
monitors
within
the
Fort
Wayne
MSA
are
located
in
the
Fort
Wayne
Urban
Area.
All
values
for
2000­
2002
and
2001­
2003
are
below
the
standard.
Since
it
is
reasonable
to
assume
that
the
highest
values
within
the
MSA
would
occur
where
urban
excess
is
most
likely,
and
those
values
are
below
the
standard,
IDEM
believes
that
the
entire
MSA
is
in
compliance
with
the
PM
2.5
standard.
Therefore,
IDEM
recommends
that
Allen
County
be
designated
attainment,
and
the
remaining
counties
within
the
MSA
be
designated
attainment/
unclassifiable.

Kokomo
Area:
Counties
Affected:
Kokomo
Area:
Howard
and
Tipton
Counties
EPA
Proposed
8­
hour
Ozone
Nonattainment
Area:
None:
Kokomo
Area
is
Attainment
Monitor
Values
(
average
value
in
micrograms
per
cubic
meter):

2000­
2002
2001­
2003
COUNTY
MONITOR
LOCATION
AVERAGE
VALUE
AVERAGE
VALUE
Howard
Kokomo
15.1
14.7
17
Evaluation:
County
Feb
15,
2004
Preliminary
Designation
Recommendations
Howard
Attainment
Tipton
Attainment/
Unclassifiable
Discussion:
Based
on
2000­
2002
data,
the
monitor
located
in
Howard
County
marginally
exceeded
the
standard.
However,
the
year
2000
represented
the
highest
annual
average
for
many
sites
in
Indiana
and
weighted
the
2000­
2002
average
adversely.
The
2001­
2003
average
PM
2.5
value
for
the
Howard
County
monitor
is
below
the
standard
and
consistent
with
values
registered
at
background
sites.
Therefore,
IDEM
recommends
that
Howard
and
Tipton
Counties
be
designated
attainment
and
attainment/
unclassifiable
respectively.

Lafayette
Area:
Counties
Affected:
Lafayette
Area:
Tippecanoe
and
Carroll
Counties
EPA
Proposed
8­
hour
Ozone
Nonattainment
Area:
None:
Lafayette
is
attainment
Monitor
Values
(
average
value
in
micrograms
per
cubic
meter):

COUNTY
MONITOR
LOCATION
2000­
2002
AVERAGE
VALUE
2001­
2003
AVERAGE
VALUE
Tippecanoe
Fire
Station
15.4*
Tippecanoe
3401
Greenbush
St
14.1*
14.0*
Tippecanoe
Scenario
A**
15.2
14.7
Tippecanoe
Scenario
B
14.8
14.3
Tippecanoe
Scenario
C
14.9
14.3
Tippecanoe
Scenario
D
14.9
14.3
Tippecanoe
Scenario
E
14.7
14.2
*
The
monitor
was
moved
in
2002.
These
are
the
averages
at
each
location;
this
data
is
incomplete.
**
These
are
different
scenarios
for
filling
in
the
missing
data
(
see
below
for
details).

Evaluation:
County
Feb
15,
2004
Preliminary
Designation
Recommendations
Tippecanoe
Attainment/
Unclassifiable
Carroll
Attainment/
Unclassifiable
18
Discussion:
According
to
EPA
guidance,
the
monitoring
data
for
the
Lafayette
monitor
site
is
incomplete.
Furthermore,
since
the
capture
rate
for
the
third
quarter
of
2002
is
less
than
50%,
a
quarterly
maximum
substitution
is
not
advisable.
Although
a
three­
year
average
based
on
complete
data
will
not
be
available
until
at
least
the
close
of
2005,
IDEM
has
summarized
alternate
methods
for
evaluating
the
captured
data
in
Figure
3.2
(
attached
to
this
document).

As
illustrated
by
each
of
the
data
analysis
methods
in
Figure
3.2,
the
three­
year
average
PM
2.5
value
(
2001­
2003)
for
the
Lafayette
monitor
site
is
likely
below
the
standard.
Additionally,
since
the
critical
value
(
the
quarterly
average
value
required
for
the
three­
year
average
to
exceed
the
standard)
for
the
third
quarter
of
2002
is
22.44,
and
no
quarterly
average
during
the
three
year
period
even
approaches
this
critical
value,
we
are
confident
in
stating
that
the
PM
2.5
concentrations
in
Tippecanoe
County
are
below
the
standard.
Therefore,
IDEM
recommends
that
Tippecanoe,
along
with
Benton
and
Carroll
Counties
be
designated
attainment/
unclassifiable.

Muncie
Area:
Counties
Affected:
Muncie
Area:
Delaware
County
EPA
Proposed
8­
hour
Ozone
Nonattainment
Area:
Muncie
Area:
Delaware
County
Monitor
Values
(
average
value
in
micrograms
per
cubic
meter):

2000­
2002
2001­
2003
COUNTY
MONITOR
LOCATION
AVERAGE
VALUE
AVERAGE
VALUE
Delaware
Muncie,
Scenario
A*
15.1
14.3
Delaware
Scenario
B
16.0
16.1
Delaware
Scenario
C
15.0
14.5
Delaware
Scenario
D
14.6
13.6
Delaware
Scenario
E
14.8
14.0
Delaware
Scenario
F
14.7
13.8
*
This
monitor
data
is
incomplete;
it
is
missing
the
required
amount
of
data
in
two
different
quarters.
These
are
scenarios
for
filling
in
the
missing
data
(
see
below
for
more
details).

Evaluation:
County
Feb
15,
2004
Preliminary
Designation
Recommendations
Delaware
Attainment
19
Discussion:
According
to
EPA
guidance,
the
monitoring
data
for
the
Delaware
County
site
is
incomplete.
Figure
3.3
(
attached
to
this
document)
provides
a
summary
of
alternate
methods
for
evaluating
the
captured
data.

IDEM
does
not
believe
that
the
substitution
of
the
quarterly
maximum
value
(
worst­
case
scenario)
results
in
a
PM
2.5
value
representative
of
the
PM
2.5
concentrations
registered
at
the
Delaware
County
monitor.
As
noted
in
Figure
3.3,
four
reasonable
data
analysis
methods
indicate
that
the
three­
year
average
PM
2.5
value
is
below
the
standard.
Additionally,
in
using
the
highest
first
quarter
value
among
2000
and
2002
as
a
substitution
for
either
first
quarter
2001
or
first
quarter
2002,
the
critical
value
(
the
quarterly
average
value
required
for
the
three­
year
average
to
exceed
the
standard)
for
either
quarter
is
20.74.
No
quarterly
average
during
the
three
year
period
even
approaches
this
critical
value,
so
we
are
confident
in
stating
that
the
PM
2.5
concentrations
in
Delaware
County
are
below
the
standard.
Also
worth
noting
is
that
the
three­
year
average
value
resulting
from
calculation
scenarios
A,
C,
and
D
are
similar
to
the
actual
monitor
value
associated
with
neighboring
Madison
County
(
14.6).

IDEM
believes
that
a
recommendation
for
Delaware
County
to
be
designated
attainment
is
consistent
with
monitored
PM
2.5
values
within
the
area.

Terre
Haute
Area:
Counties
Affected:
Terre
Haute
Area:
Clay,
Sullivan,
Vermillion
and
Vigo
Counties
EPA
Proposed
8­
hour
Ozone
Nonattainment
Area:
Terre
Haute
Area:
Vigo
County
Monitor
Values
(
average
value
in
micrograms
per
cubic
meter):

2000­
2002
2001­
2003
COUNTY
MONITOR
LOCATION
AVERAGE
VALUE
AVERAGE
VALUE
Vigo
Terre
Haute
15.2
14.6
Vigo
Terre
Haute
Devaney
School
13.5
13.4
Evaluation:
County
Feb
15,
2004
Preliminary
Designation
Recommendations
Sullivan
Attainment/
Unclassifiable
Vermillion
Attainment/
Unclassifiable
Vigo
Attainment
Clay
Attainment/
Unclassifiable
20
Discussion:
Based
on
2000­
2002
monitoring
data,
one
of
the
two
monitors
located
in
Vigo
County
exceeded
the
standard.
However,
the
year
2000
represented
the
highest
annual
average
for
many
sites
in
Indiana
and
weighted
the
2000­
2002
average
adversely.
The
2001­
2003
average
PM
2.5
values
for
Vigo
County
monitors
are
below
the
standard
and
consistent
with
values
registered
at
nearby
background
sites.
Therefore,
IDEM
recommends
that
Vigo
County
be
designated
attainment
and
the
remaining
counties
within
the
MSA
be
designated
attainment/
unclassifiable.
