Document ID: EPA-HQ-OAR-2003-0083-1359
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2004-03-19T05:00Z

North
Carolina
Recommendation
for
Person
County
The
purpose
of
this
paper
is
to
discuss
the
rationale
for
recommending
the
township
of
Bushy
Fork
in
Person
County,
rather
than
the
entire
county,
as
nonattainment
for
the
8­
hour
ozone
standard.

 
First,
this
area
has
a
marginal
8­
hour
ozone
problem,
with
a
design
value
in
2000­
2002
of
0.090
ppm,
and
a
design
value
in
2001­
2003
of
0.091
ppm.
 
Second,
based
on
1997
emissions
inventories,
Person
County
has
221.37
tons
per
day
of
NOx
(
state
total
is
2529
tons
per
day)
and
the
county
has
7.11
tons
per
day
of
VOC
(
state
total
is
1842
tons
per
day
 
anthropogenic
only).
The
majority
of
the
NOx
(
217.72
tons
per
day)
comes
from
two
major
NOx
utility
sources
in
Person
County
(
Roxboro
and
Mayo
facilities)
that
are
subject
to
the
NOx
SIP
Call
and
the
Clean
Smokestacks
Act.
The
expected
NOx
emissions
in
2007
from
the
Roxboro
and
Mayo
facilities
are
23
and
6
tons
per
day,
respectively.
The
next
largest
source
of
NOx
emissions
is
from
mobile
sources
(
2.14
tons
per
day),
and
the
combined
Federal
and
State
control
programs
will
address
these
emissions.
Low
sulfur
gasoline
will
be
required
statewide.
 
Third,
35,623
people
live
in
Person
County,
2,353
people
live
in
the
townships
recommended
as
nonattainment.
The
entire
county
is
very
rural,
with
4
large
census
tracts
of
50­
100
people
per
square
mile.
The
two
remaining
small
tracts
have
250­
500
people
per
square
mile.
The
area
recommended
as
nonattainment
is
adjacent
to
Orange
County
nonattainment
area
and
the
monitor
is
located
in
the
Bushy
Fork
township.
 
Winds
in
Person
County
are
climatologically
from
the
southwest
during
the
ozone
season.
With
this
climatological
wind
pattern,
the
county
is
not
in
an
upwind
sector
that
would
routinely
have
an
impact
on
air
quality
in
any
portion
of
North
Carolina.
On
the
days
when
the
monitor
exceeds
the
8­
hour
standard,
it
appears
to
be
measuring
the
urban
plume
or
pollution
from
the
other
urban
areas,
particularly
the
Triad,
and
on
a
limited
number
of
days,
the
Triangle.
As
the
pollution
in
the
nearest
urban
areas
is
reduced,
and
as
controls
required
by
the
NOx
SIP
Call
and
the
Clean
Smokestacks
Act
are
implemented,
the
monitor
should
observe
lower
ozone
levels.
 
Finally,
North
Carolina
expects
this
area
to
attain
by
2007
based
on
the
most
recent
air
quality
modeling
analysis.
The
future
(
2007)
design
value
­
which
is
based
on
an
application
of
the
US
EPA's
modeled
attainment
test
­
at
the
monitor
in
Person
County
(
Bushy
Fork)
is
projected
to
be
0.078
ppm.
 
Based
on
the
information
presented
above,
North
Carolina
continues
to
believe
this
is
an
appropriate
boundary
for
this
region.
This
site
is
clearly
a
"
downwind"
area
from
the
emissions
of
any
consequence
and
the
Bushy
Fork
monitor
was
sited
at
that
location
to
be
the
downwind
monitor
for
the
upwind
source
area
that
North
Carolina
is
recommending
for
non­
attainment.
The
county
is
a
rural
county.
Additionally,
the
major
sources
in
the
county
will
be
reducing
the
NOx
emissions
significantly
due
to
compliance
with
the
NOx
SIP
Call
and
the
Clean
Smokestacks
Act.