Document ID: EPA-HQ-OAR-2003-0083-1370
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2004-03-19T05:00Z

North
Carolina
Recommendation
for
Randolph
County
The
purpose
of
this
paper
is
to
discuss
the
rationale
for
recommending
the
area
north
of
Highway
64
and
the
Asheboro
municipal
boundary,
rather
than
the
entire
county,
as
nonattainment
for
the
8­
hour
ozone
standard.

 
The
8­
hour
ozone
problem
for
Randolph
County
is
marginal
with
a
design
value
of
0.088
ppm
from
2000­
2002
and
0.085
ppm
from
2001­
2003.
 
Based
on
the
2000
census,
the
population
in
the
recommended
area
is
about
91,134
and
the
total
population
in
Randolph
County
is
130,454.
Also,
North
Carolina
believes
that
this
boundary
captures
the
area
from
which
the
roughly
7.5%
commuters
to
Guilford
County
drive
each
day
to
work.
 
The
population
density
in
the
remaining
portion
of
Randolph
County
is
very
low,
with
2
large
tracts
with
0­
50
people
per
square
mile
and
one
large
tract
with
50­
100
people
per
square
mile.
 
Regarding
the
meteorology,
the
winds
are
climatologically
from
the
southwest.
On
the
days
when
the
monitor
exceeds
the
8­
hour
standard,
it
appears
to
be
measuring
the
urban
plume
or
pollution
from
the
Greensboro/
Winston­
Salem/
High
Point
and
Charlotte
areas.
Therefore,
as
the
pollution
in
the
Greensboro/
Winston­
Salem/
High
Point
and
Charlotte
areas
are
reduced,
the
monitor
should
observe
lower
ozone
levels.
 
The
majority
of
the
NOx
emissions
are
from
mobile
and
nonroad
sources.
Of
the
total
25.04
tons
per
day
from
NOx,
17.96
tons
per
day
are
from
mobile
and
6.44
tons
per
day
are
from
nonroad.
Point
sources
contribute
only
0.05
tons
per
day
of
NOx.
Federal
and
State
control
programs,
such
as
low
sulfur
gasoline
being
required
statewide,
will
address
these
NOx
emissions
from
mobile
and
nonroad
sources.
The
I/
M
program
will
be
implemented
in
Randolph
County
by
January
2004.
 
In
conclusion,
based
on
the
information
presented
above,
North
Carolina
continues
to
believe
this
is
an
appropriate
boundary
for
this
region.
North
Carolina
expects
this
area
to
attain
by
2007
with
a
projected
design
value
of
0.073
ppm.