Document ID: EPA-HQ-OAR-2003-0083-1475
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2004-04-01T05:00Z

Meigs
County
Technical
Support
Documentation
Summary
Meigs
County
has
a
land
area
of
195
square
miles
and
is
on
the
western
fringe
of
the
Valley
and
Ridge
physiographic
province
of
the
East
Grand
Division
of
the
State.
The
predominate
wind
direction
and
speed
is
from
the
south
at
7
to
10
knots.

For
the
2001­
2003
monitoring
period,
the
ozone
monitor
471210104
­
1
located
in
Meigs
County
shows
an
8­
hour
design
value
of
0.088
parts
per
million
(
ppm)
which
would
be
classified
as
nonattainment.

Based
on
projections
to
2002
from
the
2000
census
data,
there
are
11,310
persons
living
in
Meigs
County.
This
indicates
a
population
density
of
58
persons
per
square
mile.
The
population
of
Meigs
County
is
100%
rural.
The
largest
cities
in
Meigs
County
are
Decatur.
The
population
is
expected
to
increase
by
4%
between
2000
and
2010.
Based
on
the
2002
population
data
for
the
entire
Chattanooga
MSA
and
Meigs
County,
Meigs
County
represents
approximately
2%
of
the
total
Chattanooga
MSA
population.

Point
source
NOX
emissions
from
Meigs
County
were
estimated
at
0.04
ton/
day
in
1999
which
represents
less
than
one
percent
of
the
20.36
ton/
day
of
overall
NOX
point
source
emissions
from
the
Chattanooga
MSA.
Point
source
VOC
emissions
were
estimated
at
0.59
ton/
day
in
1999
which
represents
approximately
1%
of
the
62.65
ton/
day
of
overall
VOC
point
source
emissions
from
the
Chattanooga
MSA.

For
NOX
and
VOC
control,
point
sources
located
within
Meigs
County
are
subject
to
Prevention
of
Significant
Deterioration
(
PSD)
requirements,
Control
Technology
Guideline
Reasonable
Available
Control
Technology
(
CTG
RACT)
requirements,
Maximum
Achievable
Control
Technology
(
MACT)
requirements
for
Hazardous
Air
Pollutants
(
HAP),
and
New
Source
Performance
Standards
(
NSPS).

Mobile
source
NOX
emissions
from
Meigs
County
were
estimated
at
1.29
ton/
day
in
1999
which
represents
approximately
1%
of
the
100.31
ton/
day
of
overall
NOX
mobile
source
emissions
from
the
Chattanooga
MSA.
VOC
emissions
were
estimated
at
1.80
ton/
day
in
1999
which
represents
approximately
4%
of
the
45.94
ton/
day
of
overall
VOC
mobile
source
emissions
from
the
Chattanooga
MSA.
Commuting
traffic
from
surrounding
counties
into
Meigs
County
is
minimal.
Commuting
traffic
from
Meigs
County
into
surrounding
counties
is
significant.

Meigs
County
presents
a
unique
situation.
The
Meigs
County
ozone
monitor,
located
in
the
southwest
corner
of
the
county
suggests
a
possible
nonattainment
area
with
a
reading
of
0.088
ppm
for
the
2001­
2003
(
tentative
ozone
data).
Similarly,
there
are
virtually
no
stationary
NOX
or
VOC
sources
in
the
county.
Another
factor
making
this
a
particularly
unique
situation
is
the
shape
of
the
county.
A
long
and
narrow
county
trending
northeast
to
southwest,
some
of
Meigs
County
is
far
removed
from
the
urban
area
of
Chattanooga.
Preliminary
information
suggests
that
a
division
at
or
near
the
Hiwassee
River
may
be
the
best
geo­
political
boundary
for
a
partial
county
recommendation
of
nonattainment
with
the
remainder
of
the
county
being
attainment.
The
air
monitor
in
Meigs
County
is
located
at
the
county
line
adjacent
to
Hamilton
County.
For
this
reason
the
area
southwest
of
the
Hiwassee
River
may
be
the
portion
of
Meigs
County
designated
nonattainment.