Washington
County
Technical
Support
Documentation
Summary
Washington
County
has
a
land
area
of
326
square
miles
and
is
located
in
the
Valley
and
Ridge
region
of
the
East
Grand
Division
of
the
State.
It
is
located
in
the
southeast
portion
of
the
MSA,
and
the
southeast
portion
of
the
county
is
in
elevated
terrain
within
the
boundary
of
the
Cherokee
National
Forest.
The
predominate
wind
direction
and
speed
is
from
the
south­
southwest
at
7
to
10
knots.

Washington
County
does
not
have
an
ozone
monitor.
For
the
2001­
2003
monitoring
period,
the
ozone
monitors
located
in
Sullivan
County
are
showing
8­
hour
design
values
of
0.086
parts
per
million
(
ppm)
which
would
be
classified
as
nonattainment
Based
on
projections
to
2002
from
the
2000
census
data,
there
are
109,019
persons
living
in
Washington
County.
This
indicates
a
population
density
of
334
persons
per
square
mile.
The
population
of
Washington
County
is
approximately
32.6%
rural
with
the
remaining
67.4%
living
in
incorporated
areas.
The
population
is
expected
to
increase
by
8%
between
2000
and
2010.
Based
on
the
2002
population
data
for
the
entire
JC­
K­
B
MSA,
Washington
County
represents
approximately
23%
of
the
total
JC­
K­
B
MSA
population.

Point
source
NOX
emissions
from
Washington
County
were
estimated
at
1.22
ton/
day
in
1999
which
represents
approximately
1%
of
the
95.21
ton/
day
of
overall
NOX
point
source
emissions
from
the
JC­
K­
B
MSA.
VOC
emissions
were
estimated
at
14.51
ton/
day
in
1999
which
represents
approximately
9%
of
the
150.45
ton/
day
of
overall
VOC
point
source
emissions
from
the
JC­
K­
B
MSA.

For
NOX
and
VOC
control,
point
sources
located
within
Washington
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
Washington
County
were
estimated
at
16.04
ton/
day
in
1999
which
represents
approximately
22%
of
the
74.14
ton/
day
of
overall
NOX
mobile
source
emissions
from
the
JC­
K­
B
MSA.
VOC
emissions
were
estimated
at
8.80
ton/
day
in
1999
which
represents
approximately
23%
of
the
38.24
ton/
day
of
overall
VOC
mobile
source
emissions
from
the
JC­
K­
B
MSA.
Commuting
traffic
from
surrounding
counties
into
Washington
County
is
minimal.
Commuting
traffic
from
Washington
County
into
surrounding
counties
is
high.

Preliminary
analysis
of
the
2003
ozone
data
for
the
representative
monitor
indicates
that
the
2001­
2003
design
value
will
be
approximately
0.086
ppm.
Washington
County
is
not
making
a
significant
contribution
to
the
ozone
forming
emissions
in
the
JC­
K­
B
MSA
area.
NOX
is
only
1%
of
the
point
source
strength,
and
preliminary
modeling
shows
attainment
by
2007.
Washington
County
will
also
be
a
part
of
a
new
MSA
under
the
2000
Census.
This
new
classification
will
increase
the
difficulty
in
addressing
nonattainment
planning
because
the
county
would
not
be
a
part
of
the
other
MSA
in
which
Sullivan
County
is
located.
