Document ID: EPA-HQ-OAR-2003-0083-0672
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2003-08-28T04:00Z

Clarksville,
TN­
Hopkinsville,
KY
Area
Christian
Montgomery
The
Clarksville
TN­
Hopkinsville,
KY
MSA
was
listed
in
2001
as
being
the
166th
largest
MSA
within
the
United
States.
The
Clarksville,
TN­
Hopkinsville,
KY
MSA
includes
Christian
County
in
Kentucky
and
Montgomery
County
in
Tennessee.
Christian
County
is
located
approximately
70
miles
northwest
of
Nashville,
Tennessee.
2
Christian
County,
Kentucky
Christian
County
is
Kentucky's
second
largest
county
in
area.
It
is
situated
in
southwestern
Kentucky,
and
borders
Tennessee
to
the
south,
Hopkins
County,
Kentucky,
to
the
north,
Trigg
County,
Kentucky,
to
the
west
and
Todd
County,
Kentucky,
to
the
east.

Geography/
Topography
Christian
County
is
part
of
the
Clarksville,
TN­
KY
Metropolitan
Statistical
Area
(
MSA).
This
MSA
includes
Clarksville,
Tennessee
(
i.
e.,
Montgomery
County)
and
Hopkinsville,
Kentucky
(
i.
e.,
Christian
County).
Christian
County
has
a
land
area
of
721
square
miles
Meteorological
Information
Due
to
the
close
proximity
of
Nashville,
Tennessee,
meteorological
data
from
Nashville
was
used
for
this
Kentucky
area.
Wind
speed/
wind
direction
information
for
Nashville
shows
that
the
majority
of
the
time
for
the
period
1988
 
1992,
the
wind
in
the
Christian
County
area
came
from
the
southwest
and
typically
from
7­
10
knots.
(
See
figure
1­
A)
The
mean
high
temperature
for
July
for
the
area
from
1961
through
1990
was
90
°
F.
The
mean
low
was
69
°
F.
The
mean
precipitation
for
the
same
period
was
4.0
inches.

Planning
The
authority
for
air
quality
planning
in
the
Christian
County
area
resides
with
the
Kentucky
Natural
Resources
and
Environmental
Protection
Cabinet.
Transportation
planning
for
Christian
County
is
performed
by
the
Kentucky
Transportation
Cabinet.

Air
Monitoring
For
the
2000
 
2002
monitoring
period,
the
ozone
monitor
(
TVA
site)
located
in
Christian
County,
Kentucky
shows
an
8­
hour
design
value
of
.085
parts
per
million
(
ppm)
which
would
be
classified
as
a
county
in
violation
of
the
standard.
The
Montgomery
County,
Tennessee
monitor
that
had
an
8­
hour
design
value
of
.088
ppm
in
2000
was
discontinued
in
2001.
(
See
table
1­
A)
3
Population
Based
on
projections
to
2001
from
2000
census
data,
there
are
71,649
persons
living
in
Christian
County,
Kentucky,
which
represents
approximately
99
persons
per
square
mile.
The
population
of
Christian
County
is
approximately
27%
rural
with
the
remaining
73%
living
in
incorporated
areas.
The
largest
city
in
Christian
County
is
Hopkinsville.
(
See
table
1­
C)

Christian
County's
population
from
1990
through
2000
increased
by
approximately
5%
(
68,941
to
72,265).
The
Christian
County
population
is
further
expected
to
increase
by
an
additional
4%
between
2000
and
2010.
In
addition,
the
Montgomery
County,
Tennessee
population
from
1990
through
2000
increased
by
approximately
34%.
(
See
table
1­
B)

Air
Emissions
Point
source
emissions
in
tons
per
summer
day
(
tpsd)
were
not
available
for
Tennessee.
Therefore,
an
annual
emission
comparison
is
being
performed.
VOC
point
source
emissions
from
Christian
County
were
estimated
at
742
tons
per
year
(
tpy)
in
1999
which
represents
approximately
47%
of
the
total
1,565
tpy
overall
VOC
point
source
emissions
from
the
Clarksville­
Hopkinsville
Area.
Point
source
NOx
emissions
from
Christian
County
were
estimated
at
127
tpy
in
1999
which
represents
approximately
25%
of
the
total
509
tpy
overall
NOx
point
source
emissions
from
the
Clarksville­
Hopkinsville
MSA.
(
See
table
1­
D)

1999
NEI
Clarksville­
Hopkinsville
Point
Source
Emissions
(
tons
per
year)

VOC
Emissions
tons
per
year
Montgomery
53%

Christian
47%
NOx
Emissions
tons
per
year
Montgomery
75%

Christian
25%
4
In
addition,
2001
point
source
VOC
emissions
from
Christian
County
were
estimated
at
1.68
tpsd
in
2001.
The
Christian
County
2001
point
source
NOx
emissions
were
estimated
to
be
0.13
tpsd.
(
See
table
1­
E)

Point
sources
located
within
Christian
County
are
subject
to
PSD
requirements,
CTG
RACT
requirements,
Maximum
Achievable
Control
Technology
(
MACT)
requirements
for
sources
of
Hazardous
Air
Pollutants,
and
New
Source
Performance
Standards
(
NSPS).

Based
on
data
from
the
1999
NEI,
Onroad
mobile
source
VOC
emissions
from
Christian
County
were
estimated
at
2,035
tons
per
year
(
tpy)
in
1999
which
represents
approximately
41%
of
the
total
4,970
tpy
overall
VOC
onroad
mobile
source
emissions
from
the
Clarksville­
Hopkinsville
Area.
Onroad
mobile
source
NOx
emissions
from
Christian
County
were
estimated
at
3,215
tpy
in
1999
which
represents
approximately
46%
of
the
total
7,003
tpy
overall
NOx
onroad
mobile
source
emissions
from
the
Clarksville­
Hopkinsville
MSA.
(
See
table
1­
D)

1999
NEI
Christian
County
Onroad
Mobile
Source
Emissions
(
tons
per
year)

In
addition,
2001
onroad
mobile
source
VOC
emissions
within
Christian
County
were
estimated
to
be
4.63
tpsd.
Christian
County
2001
onroad
mobile
NOx
emissions
were
estimated
to
be
7.19
tpsd.
(
See
table
1­
E)
VOC
Emissions
tons
per
year
Montgomery
59%

Christian
41%
NOx
Emissions
tons
per
year
Montgomery
54%

Christian
46%
5
Commuting
traffic
from
other
counties
into
Christian
County
is
high,
and
the
commuting
traffic
from
Christian
County
into
other
counties
is
minimal.

Commuting
Classifications
Not
Significant
0­
10%
Minimal
11­
30%
High
31­
50%
Significant
51%
or
more
6
1999
VOC
Contribution
(
tons
per
year)

1999
NOx
Contribution
(
tons
per
year)
742
2035
823
2935
0
500
1000
1500
2000
2500
3000
3500
4000
Christian
Montgomery
Mobile
Point
127
3215
382
3789
0
500
1000
1500
2000
2500
3000
3500
4000
Christian
Montgomery
Mobile
Point
7
Conclusion
and
Recommendation
Monitoring
data
and
emissions
data
presented
indicate
that
Christian
County,
Kentucky
should
be
designated
nonattainment
for
the
8­
hour
ozone
standard.
8
Clarksville­
Hopkinsville
MSA
Figure
1­
A
Wind
Rose
Patterns
Figure
1­
B
Clarksville­
Hopkinsville
1999
NEI
VOC
and
NOx
Emissions
(
tons
per
year)

2777
3342
3758
4171
0
500
1000
1500
2000
2500
3000
3500
4000
4500
Christian
Montgomery
VOC
NOx
9
Table
1­
A
Ozone
Design
Values
(
parts
per
million)

County
2000
2001
2002
Design
Value
Christian
.081
.082
.093
.085
Montgomery
.088
**
**
**

**
Montgomery
County,
TN,
ozone
monitor
was
discontinued
in
2001.

Table
1­
B
Clarksville­
Hopkinsville
MSA
Population
Growth
Data
County
1990
2000
%
Growth
1990
 
2000
2010
%
Growth
2000
 
2010
Christian
68,941
72,265
4.8%
74,791
3.5%

Montgomery
*
*
34.1%
*
*

*
Not
Available
Table
1­
C
2001
Estimated
Clarksville­
Hopkinsville
MSA
Population
Kentucky
Estimated
Population
Christian
County
71,649
Tennessee
Montgomery
County
135,023
Table
1­
D
1999
NEI
Clarksville­
Hopkinsville
MSA
VOC
and
NOx
Emissions
(
tons
per
year)

VOC
NOx
County
Point
Mobile
Total
Point
Mobile
Total
Christian
742
2035
2777
127
3215
3342
Montgomery
823
2935
3758
382
3789
4171
Total
1565
4970
6535
509
7004
7513
10
Table
1­
E
2001
Christian
County
VOC
and
NOx
Emissions
(
tons
per
summer
day)

VOC
NOx
County
Point
Mobile
Total
Point
Mobile
Total
Christian
1.68
4.63
6.31
0.13
7.19
7.32