Document ID: EPA-R06-OAR-2005-TX-0027-0036
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2006-08-25T04:00Z

ENVIRONMENTAL
PROTECTION
AGENCY
40
CFR
Part
52
[
EPA­
R06­
OAR­
2005­
TX­
0027;
FRL­______________________]

Approval
and
Promulgation
of
Air
Quality
Implementation
Plans;
Texas;
Revisions
to
Chapter
117,
Emission
Inventories,
Transportation
Conformity
Budgets,
and
5%
Increment
of
Progress
Plan
for
the
Dallas/
Fort
Worth
8­
Hour
Ozone
Nonattainment
Area
AGENCY:
Environmental
Protection
Agency
(
EPA).

ACTION:
Proposed
rule.

SUMMARY:
The
EPA
is
proposing
to
approve
revisions
to
the
State
Implementation
Plan
(
SIP)

submitted
by
the
state
of
Texas
for
the
Dallas/
Fort
Worth
(
DFW)
nonattainment
area
as
meeting
1­
hour
ozone
serious
area
requirements.
EPA
is
proposing
to
approve
the
5%
Increment
of
Progress
(
IOP)
emission
reduction
plan,
the
2002
base
year
inventory,
and
a
2007
motor
vehicle
emission
budget
for
the
DFW
8­
hour
ozone
nonattainment
area.
EPA
is
also
proposing
to
approve
a
federal
consent
decree
concerning
the
Alcoa
Rockdale
plant
in
Milam
County;
energy
efficiency
measures
implemented
within
the
DFW
8­
hour
ozone
nonattainment
area;
and
revisions
to
30
TAC,
Chapter
117,
Control
of
Air
Pollution
From
Nitrogen
Compounds,
concerning
stationary
reciprocating
internal
combustion
engines
operating
within
the
DFW
8­
hour
ozone
nonattainment
area.
These
revisions
will
allow
the
State
of
Texas
to
fulfill
remaining
obligations
under
the
1­
hour
ozone
standard
in
the
DFW
nonattainment
area.
These
actions
are
being
taken
in
accordance
with
section
110
and
part
D
of
the
Clean
Air
Act
(
the
Act)
and
EPA's
regulations.
2
The
intended
effect
of
this
action
is
to
approve
revisions
submitted
which
satisfy
outstanding
1­

hour
ozone
obligations
for
the
DFW
area
and
result
in
emission
reductions
within
3
years
of
the
DFW
area's
nonattainment
designation
under
the
8­
hour
ozone
standard.

DATE:
Comments
must
be
received
on
or
before
[
Insert
date
30
days
from
date
of
publication
in
the
Federal
Register].

ADDRESSES:
Submit
your
comments,
identified
by
Docket
No.
EPA­
R06­
OAR­
2005­
TX­

0027,
by
one
of
the
following
methods:

°
Federal
eRulemaking
Portal:
http://
www.
regulations.
gov.
Follow
the
on­
line
instructions
for
submitting
comments.

°
U.
S.
EPA
Region
6
"
Contact
Us"
web
site:
http://
epa.
gov/
region6/
r6coment.
htm.

Please
click
on
"
6PD"
(
Multimedia)
and
select
"
Air"
before
submitting
comments.

°
E­
mail:
Mr
Thomas
Diggs
at
diggs.
thomas@
epa.
gov.
Please
also
send
a
copy
by
email
to
the
person
listed
in
the
FOR
FURTHER
INFORMATION
CONTACT
section
below.

°
Fax:
Mr.
Thomas
Diggs,
Chief,
Air
Planning
Section
(
6PD­
L),
at
fax
number
214­
665­

7263.

°
Mail:
Mr.
Thomas
Diggs,
Chief,
Air
Planning
Section
(
6PD­
L),
Environmental
Protection
Agency,
1445
Ross
Avenue,
Suite
1200,
Dallas,
Texas
75202­
2733.

°
Hand
or
Courier
Delivery:
Mr.
Thomas
Diggs,
Chief,
Air
Planning
Section
(
6PD­
L),

Environmental
Protection
Agency,
1445
Ross
Avenue,
Suite
1200,
Dallas,
Texas
75202­
2733.
3
Such
deliveries
are
accepted
only
between
the
hours
of
8:
00
a.
m.
and
4:
00
p.
m.
weekdays
except
for
legal
holidays.
Special
arrangements
should
be
made
for
deliveries
of
boxed
information.

Instructions:
Direct
your
comments
to
Docket
ID
No.
EPA­
R06­
OAR­
2005­
TX­
0027.
EPA's
policy
is
that
all
comments
received
will
be
included
in
the
public
docket
without
change
and
may
be
made
available
online
at
www.
regulations.
gov,
including
any
personal
information
provided,

unless
the
comment
includes
information
claimed
to
be
Confidential
Business
Information
(
CBI)

or
other
information
the
disclosure
of
which
is
restricted
by
statute.
Do
not
submit
information
through
www.
regulations.
gov
or
e­
mail
that
you
consider
to
be
CBI
or
otherwise
protected
from
disclosure.
The
www.
regulations.
gov
website
is
an
"
anonymous
access"
system,
which
means
EPA
will
not
know
your
identity
or
contact
information
unless
you
provide
it
in
the
body
of
your
comment.
If
you
send
an
e­
mail
comment
directly
to
EPA
without
going
through
www.
regulations.
gov,
your
e­
mail
address
will
be
automatically
captured
and
included
as
part
of
the
comment
that
is
placed
in
the
public
docket
and
made
available
on
the
Internet.
If
you
submit
an
electronic
comment,
EPA
recommends
that
you
include
your
name
and
other
contact
information
in
the
body
of
your
comment
and
with
any
disk
or
CD­
ROM
you
submit.
If
EPA
cannot
read
your
comment
due
to
technical
difficulties
and
cannot
contact
you
for
clarification,

EPA
may
not
be
able
to
consider
your
comment.
Electronic
files
should
avoid
the
use
of
special
characters,
any
form
of
encryption,
and
be
free
of
any
defects
or
viruses.

Docket:
All
documents
in
the
docket
are
listed
in
the
www.
regulations.
gov
index.
Although
listed
in
the
index,
some
information
is
not
publicly
available,
e.
g.,
CBI
or
other
information
whose
4
disclosure
is
restricted
by
statute.
Certain
other
material,
such
as
copyrighted
material,
will
be
publicly
available
only
in
hard
copy.
Publicly
available
docket
materials
are
available
either
electronically
in
www.
regulations.
gov
or
in
hard
copy
at
the
Air
Planning
Section
(
6PD­
L),

Environmental
Protection
Agency,
1445
Ross
Avenue,
Suite
700,
Dallas,
Texas
75202­
2733.
The
file
will
be
made
available
by
appointment
for
public
inspection
in
the
Region
6
FOIA
Review
Room
between
the
hours
of
8:
30
a.
m.
and
4:
30
p.
m.
weekdays
except
for
legal
holidays.
Contact
the
person
listed
in
the
FOR
FURTHER
INFORMATION
CONTACT
paragraph
below
to
make
an
appointment.
If
possible,
please
make
the
appointment
at
least
two
working
days
in
advance
of
your
visit.
There
will
be
a
15
cents
per
page
fee
for
making
photocopies
of
documents.
On
the
day
of
the
visit,
please
check
in
at
the
EPA
Region
6
reception
area
at
1445
Ross
Avenue,
Suite
700,
Dallas,
Texas.

The
State
submittal
is
also
available
for
public
inspection
at
the
State
Air
Agency
listed
below
during
official
business
hours
by
appointment:

Texas
Commission
on
Environmental
Quality,
Office
of
Air
Quality,
12124
Park
35
Circle,

Austin,
Texas
78753.

FOR
FURTHER
INFORMATION
CONTACT:
Inquiries
regarding
Chapter
117
should
be
directed
to
Alan
Shar,
Air
Planning
Section
(
6PD­
L),
Environmental
Protection
Agency,
Region
6,
1445
Ross
Avenue,
Suite
700,
Dallas,
Texas
75202­
2733,
telephone
(
214)
665­
6691;
fax
number
214­
665­
7263;
e­
mail
address
shar.
alan@
epa.
gov.
Inquiries
on
all
other
aspects
of
this
rulemaking
should
be
directed
to
Carrie
Paige,
Air
Planning
Section
(
6PD­
L),
Environmental
5
Protection
Agency,
Region
6,
1445
Ross
Avenue,
Suite
700,
Dallas,
Texas
75202­
2733,

telephone
(
214)
665­
6521;
fax
number
214­
665­
7263;
e­
mail
address
paige.
carrie@
epa.
gov.

SUPPLEMENTARY
INFORMATION:

Throughout
this
document,
wherever
"
we,"
"
us,"
or
"
our"
is
used,
we
mean
the
EPA.

Outline:

I.
What
Actions
are
We
Proposing?

II.
What
is
the
Background
for
these
Actions?

III.
What
Is
Ozone?

IV.
What
are
the
5%
Increment
of
Progress
Plan
Requirements?

A.
2002
Emissions
Inventory
1.
Point
Sources
2.
Area
Sources
3.
Onroad
Mobile
Sources
4.
Nonroad
Mobile
Sources
B.
2007
Emissions
Projections
1.
What
are
the
Motor
Vehicle
Emissions
Budgets?

2.
What
NOx
Control
Measures
did
the
State
Submit?

a.
The
Texas
Emissions
Reduction
Plan
(
TERP)

b.
Energy
Efficiency
c.
Alcoa
­
Milam
County
6
d.
Stationary
Reciprocating
Internal
Combustion
Engines
3.
What
VOC
Control
Measures
did
the
State
Submit?

a.
Statewide
Portable
Fuel
Container
Rule
b.
Surface
Coating
Operations
c.
Stage
I
Vapor
Recovery
C.
Calculation
of
the
5%
Reduction
V.
Proposed
Action
VI.
Statutory
and
Executive
Order
Reviews
I.
What
Actions
are
We
Proposing?

Today
we
are
proposing
to
approve
revisions
to
the
SIP
submitted
by
the
state
of
Texas
for
the
DFW
nonattainment
area
as
meeting
1­
hour
ozone
serious
area
requirements.
We
are
proposing
to
approve
the
5%
IOP
plan
for
the
nine
counties
that
comprise
the
DFW
8­
hour
ozone
nonattainment
area.
As
an
integral
part
of
the
5%
IOP
plan,
we
are
also
proposing
to
approve
the
2002
base
year
emissions
inventory
(
EI)
and
the
2007
motor
vehicle
emissions
budget
(
MVEB).

Before
approving
the
5%
IOP
plan,
we
must
approve
all
of
the
control
measures
relied
upon
in
the
5%
IOP
plan.
The
majority
of
the
control
measures
have
already
been
approved
in
other
Federal
Register
documents.
We
are
proposing
to
approve
three
control
measures
which
support
the
5%
IOP
plan
in
today's
action:
a
federal
consent
decree
concerning
an
Alcoa
plant
in
Rockdale,
Milam
County;
energy
efficiency
measures
implemented
within
the
DFW
8­
hour
ozone
nonattainment
area;
and
revisions
to
30
TAC,
Chapter
117,
Control
of
Air
Pollution
From
Nitrogen
Compounds,
concerning
stationary
reciprocating
internal
combustion
engines
operating
7
within
the
DFW
8­
hour
ozone
nonattainment
area.
We
previously
proposed
to
approve
that
Reasonably
Available
Control
Technology
(
RACT)
is
in
place
for
all
major
sources
of
volatile
organic
compounds
(
VOCs)
in
the
DFW
1­
hour
ozone
nonattainment
area
(
66
FR
4756).

Although
we
are
not
reopening
the
comment
period
on
RACT,
we
intend
to
finalize
our
proposed
approval
at
the
same
time
we
finalize
this
proposal.
We
are
proposing
to
approve
these
revisions
under
section
110
and
part
D
of
the
Act
and
EPA's
regulations.

II.
What
is
the
Background
for
these
Actions?

The
EPA
published
the
8­
hour
ozone
designations
and
the
first
phase
governing
implementation
of
the
8­
hour
ozone
standard
(
phase
I
rule)
in
the
Federal
Register
(
FR)
on
April
30,
2004
(
69
FR
23858
and
69
FR
23951,
respectively).
The
DFW
area
was
designated
as
nonattainment
for
the
8­
hour
ozone
standard
and
comprises
nine
counties:
Collin,
Dallas,
Denton,

and
Tarrant
counties
(
these
four
constitute
the
1­
hour
ozone
nonattainment
area,
hereinafter
referred
to
as
the
four
core
counties),
and
Ellis,
Johnson,
Kaufman,
Parker
and
Rockwall
counties.
At
the
time
of
designation
however,
the
four
core
counties
remained
in
nonattainment
for
the
1­
hour
standard
and
had
two
outstanding
1­
hour
ozone
obligations:
(
1)
the
area
did
not
have
an
approved
1­
hour
ozone
attainment
demonstration;
and
(
2)
the
area
did
not
have
approved
RACT
requirements
for
major
sources
of
VOC
emissions
(
VOC
RACT).

The
phase
I
rule
revoked
the
1­
hour
ozone
standard
(
see
69
FR
23951).
The
phase
I
rule
further
provided
three
options
for
areas
that
had
not
met
the
1­
hour
ozone
attainment
demonstration
requirement:
1)
Submit
a
1­
hour
attainment
demonstration
no
later
than
1
year
after
designation;
2)
Submit
a
Reasonable
Further
Progress
(
RFP)
plan
for
the
8­
hour
National
8
Ambient
Air
Quality
Standards
(
NAAQS),
no
later
than
1
year
following
designations
for
the
8­

hour
NAAQS,
providing
a
5%
increment
of
emissions
reduction
from
the
area's
2002
EI;
or
3)

Submit
an
early
8­
hour
ozone
attainment
demonstration
SIP
that
ensures
that
the
first
segment
of
RFP
is
achieved
early
(
See
40
CFR
§
51.905(
a)(
ii)).
Texas
selected
option
2,
to
submit
the
RFP
plan
providing
a
5%
increment
of
emissions
reduction
from
the
area's
2002
EI.
This
increment
of
emissions
reduction
is
called
the
5%
IOP
plan.
Revisions
in
this
rulemaking
enable
the
DFW
area
to
meet
the
5%
IOP,
which
fulfills
the
1­
hour
ozone
attainment
demonstration
obligation.

The
phase
I
rule
also
provides
that
1­
hour
ozone
nonattainment
areas
are
required
to
adopt
and
implement
"
applicable
requirements"
according
to
the
area's
classification
under
the
1­

hour
ozone
standard
for
anti­
backsliding
purposes
(
see
40
CFR
§
51.905(
a)(
i)).
On
May
26,
2005,

we
determined
that
an
area's
1­
hour
designation
and
classification
as
of
June
15,
2004
would
dictate
what
1­
hour
obligations
remain
as
"
applicable
requirements"
under
the
phase
I
rule
(
70
FR
30592).
The
DFW
1­
hour
nonattainment
area
was
still
classified
as
serious
on
June
15,
2004,
so
the
1­
hour
ozone
standard
requirements
applicable
to
the
four
core
counties
are
those
that
apply
to
nonattainment
areas
classified
as
serious.
The
only
outstanding
"
applicable
requirement"
for
the
four
core
counties
is
the
VOC
RACT.
We
noted
above
that
we
proposed
to
approve
RACT
for
all
major
sources
of
VOCs
in
the
1­
hour
DFW
nonattainment
area
on
November
18,
2001
(
66
FR
4756)
and
received
no
comments.
Although
we
are
not
reopening
the
comment
period
on
VOC
RACT,
we
intend
to
finalize
that
proposed
approval
in
the
same
rulemaking
that
we
finalize
this
proposal.

The
DFW
area
has
satisfied
all
other
serious
area
applicable
requirements
under
the
1­
hour
ozone
standard.
See
the
area's
Clean
Fuels
Fleet
Program
(
February
7,
2001
at
66
FR
9203);
the
9
area's
post
1996
Rate
of
Progress
(
ROP)
plan
and
associated
MVEBs
(
March
28,
2005
at
70
FR
15592);
and
the
area's
15%
ROP
plan
and
associated
MVEBs
(
April
12,
2005
at
70
FR
18993).

For
a
complete
list,
see
the
Texas
SIP
map
at
http://
www.
epa.
gov/
earth1r6/
6pd/
air/
sip/
sip.
htm.

III.
What
Is
Ozone?

Ozone
is
a
gas
composed
of
three
oxygen
atoms.
At
ground
level,
it
is
created
by
a
chemical
reaction
between
nitrogen
oxides
(
NOx)
and
VOCs
in
the
presence
of
sunlight.
Ozone
and
NOx
are
two
of
six
common
pollutants,
also
known
as
criteria
pollutants,
for
which
EPA
has
set
NAAQS.
Motor
vehicle
exhaust
and
industrial
emissions,
gasoline
vapors,
and
chemical
solvents
as
well
as
natural
sources
emit
NOx
and
VOCs,
help
to
form
ozone.
Sunlight
and
hot
weather
cause
ground­
level
ozone
to
form
in
harmful
concentrations
in
the
air.
As
a
result,
ozone
is
known
as
a
summertime
air
pollutant.
Many
urban
areas
tend
to
have
high
levels
of
groundlevel
ozone,
but
rural
areas
are
also
subject
to
increased
ozone
levels
because
wind
carries
ozone
and
its
precursors
hundreds
of
miles
from
their
sources.

Repeated
exposure
to
ozone
pollution
may
cause
permanent
lung
damage.
Even
at
very
low
levels,
ground­
level
ozone
triggers
a
variety
of
health
problems
including
aggravated
asthma,

reduced
lung
capacity,
and
increased
susceptibility
to
respiratory
illnesses
like
pneumonia
and
bronchitis.
It
can
also
have
detrimental
effects
on
plants
and
ecosystems.

IV.
What
are
the
5%
Increment
of
Progress
Plan
Requirements?
10
1
"
Guidance
on
5%
Increment
of
Progress"
(
40
CFR
51.905(
a)(
1)(
ii)),
August
18,
2004;
from
Lydia
Wegman,
Director,
OAQPS,
to
EPA
Regional
Air
Directors.
EPA
issued
a
guidance
memorandum
on
August
18,
20041
that
outlines
the
criteria
for
5%

IOP
plans.
In
brief
summary,
the
guidance
states
that
the
reductions
should
be
based
on
a
2002
EI,
does
not
allow
credit
from
Federal
measures
or
measures
in
the
SIP
as
of
2002,
provides
that
the
reductions
occur
by
2007,
and
allows
use
of
NOx,
VOCs,
or
some
combination
of
both
pollutants,
to
meet
the
5%
reduction.
The
steps
involved
in
determining
the
emissions
needed
to
meet
the
5%
reduction
are
the
establishment
of
the
2002
baseline
EI,
calculation
of
the
5%

reduction,
and
projection
of
the
2007
EI.
We
will
present
the
2002
and
2007
inventories,
with
a
discussion
of
measures
that
will
contribute
to
emission
reductions
in
the
area,
and
conclude
by
demonstrating
the
5%
reduction.

A.
2002
Emissions
Inventory
The
Clean
Air
Act
Amendments
of
1990
has
the
requirement
that
EIs
be
prepared
for
ozone
nonattainment
areas.
Because
ozone
is
photochemically
produced
in
the
atmosphere
when
VOCs
are
mixed
with
NOx
in
the
presence
of
sunlight,
ozone
EIs
focus
on
these
precursor
pollutants.
The
EI
identifies
the
source
types
present
in
an
area,
the
amount
of
each
pollutant
emitted,
and
the
types
of
processes
and
control
devices
employed
at
each
plant
or
source
category.
The
Act
requires
the
inventories
to
be
actual
emissions.
The
2002
EI
will
provide
a
baseline
emission
level
for
calculating
reduction
targets
and
the
control
strategies
for
achieving
the
required
emission
reductions.
The
inventory
of
emissions
of
VOC
and
NOx
is
summarized
from
the
estimates
developed
for
four
general
categories
of
emissions
sources:
point,
area,
onroad
11
mobile,
and
nonroad
mobile.

Point
Sources
Major
point
sources
for
inventory
reporting
in
nonattainment
areas
are
defined
as
industrial,
commercial,
or
institutional
sources
that
emit
actual
levels
of
criteria
pollutants
at
or
above
10
tons
per
year
(
tpy)
of
VOC,
25
tpy
of
NOx,
or
100
tpy
of
other
criteria
pollutants.

The
Texas
Commission
on
Environmental
Quality
(
TCEQ)
collects
data
from
sources
identified
as
having
triggered
the
levels
of
emissions
indicated
above.
Data
submitted
is
quality
assured
and
entered
into
the
State
of
Texas
Air
Reporting
System.
For
more
details,
refer
to
the
Technical
Support
Document
(
TSD).

A
list
of
emissions
by
facility
for
all
nine
counties
in
the
DFW
nonattainment
area
is
provided
in
Attachment
2
of
the
TSD.
The
State
separately
accounts
for
NOx
emissions
from
the
Alcoa
facility,
as
it
lies
outside
the
DFW
nonattainment
area.
The
5%
guidance
allows
a
nonattainment
area
to
include
VOC
sources
within
100
kilometers
(
km)
and
NOx
sources
within
200
km
of
the
nonattainment
area
in
calculations
of
IOP
reductions.
The
Alcoa
facility
is
120
miles
from
DFW,
thus
only
the
NOx
emissions
are
allowed.
The
NOx
emissions
for
the
entire
facility
are
added
to
the
DFW
area's
EI,
as
required
by
the
guidance;
these
emissions
are
23.17
tons
per
day
(
tpd).
The
2002
point
source
inventory
for
NOx
is
79.31
tpd
and
28.31
tpd
for
VOCs;
with
Alcoa's
emissions,
the
point
source
inventory
for
NOx
is
adjusted
to
102.48
tpd.

Area
Sources
Area
sources
have
emissions
below
the
point
source
reporting
levels
and
are
too
numerous
12
and/
or
too
small
to
identify
individually.
Area
sources
include
commercial,
small­
scale
industrial,

and
residential
categories
that
use
materials
or
processes
that
generate
emissions.
Area
sources
are
categorized
by
hydrocarbon
evaporative
emissions
or
fuel
combustion
emissions;
examples
include
printing
operations,
house
paints,
gasoline
service
station
underground
tank
filling
and
vehicle
refueling,
outdoor
burning,
structural
fires,
and
wildfires.

Emissions
for
area
sources
are
estimated
as
county­
wide
totals.
These
emissions,
with
some
exceptions,
may
be
calculated
by
an
established,
EPA
approved,
emission
factor.
Actual
activity
data
is
used
when
available,
e.
g.,
gallons
of
gasoline
sold
in
a
county,
number
of
wildfire
acres
burned,
etc.
When
activity
data
is
unavailable,
surrogates
such
as
county
population
and
employment
data
by
industry
type
are
used.
The
methodology
is
provided
in
Appendix
A
of
the
submittal.
A
detailed
listing
of
emissions
by
area
source
type
for
all
nine
counties
in
the
DFW
area
is
provided
in
Attachment
3
of
the
TSD.
The
State
separately
accounts
for
VOC
emissions
from
the
gas
can
rule
(
see
paragraph
B(
3)
below
­
portable
fuel
containers)
within
a
100
km
radius
outside
the
DFW
area.
The
2002
area
source
inventory,
adjusted
to
include
4.52
tpd
VOC
emissions
from
the
gas
can
rule,
is
38.03
tpd
of
NOx
and
208.92
tpd
for
VOCs.

Onroad
Mobile
Sources
Onroad
mobile
sources
are
automobiles,
trucks,
motorcycles,
and
other
motor
vehicles
traveling
on
roadways.
Combustion
related
emissions
are
estimated
for
vehicle
engine
exhaust,

and
evaporative
hydrocarbon
emissions
are
estimated
for
the
fuel
tank
and
other
evaporative
leak
sources
on
the
vehicle.
The
2002
onroad
mobile
source
EI
was
prepared
by
the
North
Central
Texas
Council
of
Governments
(
NCTCOG)
and
used
the
newest
EPA
onroad
emission
factor
13
model,
MOBILE6.2.
Emission
factors
were
applied
to
vehicle
activity
using
the
Texas
Mobile
Source
Emission
Software.
Vehicle
activity
was
generated
using
the
DFW
Regional
Travel
Model.
Emissions
were
summarized
in
24
one­
hour
periods
and
for
a
daily
total
for
all
counties
identified
in
the
analysis.
Additional
details
are
included
in
the
TSD.
The
2002
onroad
mobile
source
inventory
for
NOx
is
345.44
tpd
and
156.34
tpd
for
VOCs.

Nonroad
Mobile
Sources
Nonroad
mobile
sources
are
aircraft,
railroad
locomotives,
recreational
vehicles
and
boats,

and
a
broad
range
of
equipment,
from
600­
horsepower
engines
in
the
construction
equipment
class
to
one­
horsepower
string
trimmers
in
the
lawn
and
garden
class.
The
EPA
NONROAD
model
is
used
to
calculate
emissions
for
all
nonroad
mobile
sources
except
aircraft,
locomotives,

and
commercial
marine
vessels.
This
model
generates
emissions
for
equipment
in
the
following
classes:
Agricultural,
Commercial,
Construction,
Industrial/
Oilfield,
Lawn
and
Garden,
Logging,

and
Railway
Maintenance.

Emissions
from
commercial
and
military
aircraft
are
calculated
using
the
Federal
Aviation
Administration's
Emissions
and
Dispersion
Modeling
System
model,
which
uses
actual
recorded
landing/
takeoff
(
LTO)
data
and
aircraft
types
to
generate
emissions.
Smaller
aircraft
emissions
are
calculated
using
EPA
emission
factors
and
applicable
LTO
data.
Emissions
from
ground
support
equipment
at
commercial
airports
are
based
on
a
recent
survey
in
the
DFW
area.

Locomotive
emissions
are
based
on
fuel
use
and
track
mileage
and
individual
railroad
lines
were
surveyed
for
actual
data.
The
2002
nonroad
mobile
source
inventory
is
136.24
tpd
for
NOx
and
70.08
tpd
for
VOCs.
See
the
TSD
for
more
detailed
information.
14
Although
EPA's
5%
guidance
allows
states
to
use
EPA's
draft
2002
National
Emissions
Inventory
(
NEI)
for
the
2002
baseline
inventory,
the
TCEQ
submitted
their
own
2002
EI
for
point,
area,
onroad
mobile,
and
nonroad
mobile
sources
for
all
nine
counties
in
the
DFW
nonattainment
area.
The
inventory
is
the
peak
ozone
season
daily
average
of
actual
emissions
for
each
source
and
includes
more
accurate
activity
data
than
that
available
in
EPA's
NEI.
The
TCEQ's
inventory
of
ozone
precursors
for
all
nine
counties
in
the
DFW
nonattainment
area
is
shown
in
Table
1;
the
point
and
area
emissions
are
unadjusted
for
emissions
outside
the
nonattainment
area.
This
unadjusted
EI
is
comprised
of
actual
emissions
within
the
nonattainment
area,
as
required
by
the
Act,
which
will
provide
the
baseline
emission
level
for
calculating
reduction
targets
and
the
control
strategies
for
achieving
the
required
emission
reductions.
We
are
proposing
to
approve
the
2002
baseline
EI.

Table
1
­
2002
Anthropogenic
Emissions
for
the
DFW
9­
County
Nonattainment
Area
Major
Source
Category
2002
VOC
emissions
(
tpd)
2002
NOx
emissions
(
tpd)

Point
28.31
79.31
Area
204.42
38.03
Onroad
Mobile
156.34
345.44
Nonroad
Mobile
70.08
136.24
Total
459.15
599.02
B.
2007
Emissions
Projections
The
future
year
or
2007
inventory
reflects
growth
and
controls
from
measures
already
in
the
SIP
or
expected
to
occur
due
to
Federal
measures;
these
emissions
are
presented
in
Table
2,
in
15
contrast
with
the
2002
emission
inventories.

Texas
developed
the
2007
point
source
EI
by
multiplying
the
2002
baseline
EI
by
growth
factors
that
represent
industrial
expansion
through
2007.
This
includes
all
of
the
NOx
and
VOC
controls
already
in
place,
per
State
rules
that
require
reductions
between
2002
and
2007.
The
2007
point
source
inventory
is
projected
to
be
83.52
tpd
NOx
and
30.42
tpd
VOC.
A
detailed
discussion
of
the
future
point
source
inventory
is
provided
in
the
TSD.

The
2007
EI
for
area
sources
was
projected
using
EPA's
Economic
Growth
Analysis
System
(
EGAS)
growth
factors,
which
contain
individual
growth
factors
for
each
category
and
forecasting
year.
This
is
the
EPA
standard
and
accepted
method
for
developing
future
year
EIs.

The
projected
2007
area
source
inventory
is
39.64
tpd
NOx
and
215.91
tpd
VOC.

The
MOBILE6.2
model
was
used
to
estimate
onroad
emission
factors
for
2007.
This
model
incorporates
local
information
on
fleet
mix
and
activity
data,
and
Federal,
State
and
local
measures
that
will
be
implemented
by
2007.
The
projected
2007
onroad
mobile
inventory
is
206.72
tpd
NOx
and
104.14
tpd
VOC.

The
2007
EI
for
nonroad
mobile
sources
was
developed
using
the
NONROAD
model.

Projected
LTO
data
was
used
to
develop
the
2007
aircraft
and
ground
support
EIs,
and
railroad
activity
for
2007
was
estimated
using
previous
year
surveys
and
data
from
local
railroad
lines.

The
projected
2007
nonroad
mobile
source
inventory
is
120.83
tpd
NOx
and
54.58
tpd
VOC.

Table
2:
2002
and
2007
VOC
and
NOx
Emissions
by
County
and
Major
Category
(
in
tpd)

Major
Source
Category
2002
VOC
Emissions
2007
VOC
Emissions
2002
NOx
Emissions
2007
NOx
Emissions
16
Point
28.31
30.42
79.31
83.52
Area
204.42
215.91
38.03
39.64
Onroad
Mobile
156.34
104.14
345.44
206.72
Nonroad
Mobile
70.08
54.58
136.24
120.83
Total
459.15
405.05
599.02
450.71
What
are
the
Motor
Vehicle
Emissions
Budgets?

The
motor
vehicle
emission
budget
(
MVEB)
establishes
a
ceiling
for
emissions
from
onroad
mobile
sources.
The
onroad
EI
in
the
SIP
sets
the
MVEB,
which
is
used
to
meet
the
EPA's
transportation
conformity
requirements,
found
at
40
CFR
part
51,
subpart
T
and
part
93,

subpart
A.
EPA's
conformity
rules
require
that
transportation
plans
and
related
projects
result
in
emissions
that
do
not
exceed
the
MVEB
established
in
the
SIP.

The
MVEBs
for
DFW
were
established
by
subtracting
onroad
emission
reductions
from
the
onroad
mobile
source
EI
for
2007.
The
Texas
Emission
Reduction
Plan
(
TERP)
is
a
NOx
emission
reduction
strategy
which
can
be
applied
toward
the
5%
IOP.
The
TERP
assumes
reductions
of
22.2
tpd
by
2007
and
allocates
33.1%
of
the
reductions
to
onroad
mobile
and
66.9%
to
nonroad
mobile.
The
TCEQ
has
conservatively
estimated
TERP
to
provide
onroad
mobile
NOx
reductions
of
5.4
tpd
for
the
DFW
area
by
June
15,
2007.
The
TERP
applies
specifically
to
NOx
reductions
and
information
on
VOCs
is
not
available.
The
MVEBs
for
DFW
were
found
adequate
for
use
in
transportation
conformity
on
June
01,
2005
(
70
FR
31441).
Table
3
documents
the
MVEBs
that
have
been
established
by
this
SIP
revision.
EPA
is
proposing
to
approve
these
MVEBs
and,
upon
final
approval,
all
future
transportation
improvement
programs,

projects
and
plans
for
the
DFW
area
will
need
to
show
conformity
to
the
budgets
in
this
plan;
17
previous
budgets
approved
or
found
adequate
are
not
applicable.

Table
3:
2007
DFW
Motor
Vehicle
Emissions
Budgets
Criteria
Used
to
Establish
the
2007
MVEB
VOC
(
tpd)
NOx
(
tpd)

2007
onroad
mobile
source
inventory,
unadjusted
104.14
206.72
TERP
credits
(
allocation
for
onroad
mobile)
0
 
5.4
2007
MVEB
104.14
201.32
What
NOx
Control
Measures
did
the
State
Submit?

1.
Texas
Emissions
Reduction
Plan
(
TERP)

The
TERP,
discussed
briefly
above,
was
established
by
the
Texas
Legislature
with
the
enactment
of
Senate
Bill
5
(
SB5).
The
concept
of
this
economic
incentive
program
was
approved
into
the
Texas
SIP
on
November
14,
2001
(
66
FR
57159).
State
rules
that
govern
TCEQ's
administration
of
the
TERP
were
approved
into
the
SIP
August
19,
2005
(
70
FR
48647).

The
TERP
primarily
addresses
diesel
emission
reductions,
while
a
small
percentage
of
the
program
is
allocated
to
energy
efficiency.
The
TERP
analyses
for
this
program
are
found
in
the
SIP
narrative
and
a
TCEQ
Interoffice
Memorandum
dated
August
16,
2004.
Projected
credits
are
based
on
cost
per
ton
of
previous
projects.
Considering
diesel
emission
reduction
projects
recently
funded
and
the
approach
established
for
allocating
future
TERP
funds,
we
agree
that
TERP
funding
should
be
sufficient
to
achieve
NOx
reductions
of
22.2
tpd
in
the
DFW
area
by
2007.

Additional
detail
is
provided
in
the
TSD.

2.
Energy
Efficiency
18
The
Texas
Legislature
enhanced
the
use
of
Energy
Efficiency/
Renewable
Energy
(
EE/
RE)

programs
for
meeting
TERP
goals
by
requiring
TCEQ
to
promote
the
use
of
energy
efficiency
as
a
way
of
meeting
the
NAAQS
and
to
develop
a
method
for
calculating
emissions
reductions
from
energy
efficiency.
To
achieve
energy
savings
in
new
construction,
SB
5
mandated
statewide
adoption
of
the
International
Residential
Code
(
IRC)
and
the
International
Energy
Conservation
Code
(
IECC)
for
residential,
commercial
and
industrial
buildings,
through
new
building
code
requirements
(
Texas
Health
and
Safety
Code,
Chapter
388
­
Texas
Building
Energy
Performance
Standards),
which
are
enforced
by
local
jurisdictions.
The
emissions
reductions
relied
upon
in
this
5%
IOP
plan
occurred
in
2003
because
of
the
energy
savings
achieved
by
power
plants
and
newly­
constructed
residential
buildings.

These
NOx
reductions
have
already
been
achieved.
To
calculate
the
SIP
credit
for
these
NOx
reductions,
a
method
was
developed
by
the
Energy
Systems
Laboratory
(
ESL)
of
Texas
A&
M
University,
with
assistance
from
EPA's
Office
of
Atmospheric
Programs,
the
TCEQ,
and
the
Electric
Reliability
Council
of
Texas
(
ERCOT).
We
are
proposing
to
find
that
the
methodology
for
quantifying
the
completed
emissions
reductions
for
credit
in
the
SIP
is
reasonable.
See
the
TSD
for
additional
information.
The
energy
savings
achieved
provided
NOx
reductions
at
each
power
plant
within
the
ERCOT
region
(
the
ERCOT
serves
about
85%
of
Texas,
including
the
DFW
nonattainment
area)
and
reductions
of
natural
gas
within
each
county,

statewide.
The
NOx
reductions
were
due
to
EE
measures
in
new
construction
for
single
and
multi­
family
residences.
The
reductions
in
natural
gas
were
due
to
the
elimination
of
pilot
lights
in
furnaces.

The
TCEQ
did
not
project
2007
NOx
reductions
from
EE
measures
in
the
DFW
19
nonattainment
area.
Rather,
the
State,
using
the
above­
described
methodology,
quantified
the
EE
reductions
that
have
already
occurred
by
using
several
spreadsheet
programs
that
conservatively
calculated
energy
savings
from
the
electricity
and
natural
gas
reductions
for
residential,

commercial
and
industrial
buildings.
The
measures
were
completed
and
the
reductions
occurred
by
2003.
These
reductions
have
not
been
relied
upon
in
another
RFP/
ROP
plan
for
Texas
and
will
not
receive
credit
in
another
SIP.
Therefore,
the
reductions
are
surplus.
These
measures
have
been
implemented
in
residential
construction,
which
has
a
lifetime
beyond
the
term
for
which
this
credit
is
granted
(
2007)
and
are
therefore
permanent.

As
indicated
above,
the
NOx
reductions
have
been
achieved
and
were
calculated
to
be
0.72
tpd
in
the
DFW
area.
The
total
amount
of
NOx
reductions
calculated
for
the
RFP,
as
shown
in
Table
8
below,
is
27.59
tpd.
The
SIP
credit
for
the
emissions
already
achieved
(
0.72
tpd)
is
2.6%
of
this
total
and
therefore
meets
the
3%
limit.
Additional
details
are
provided
in
the
TSD.

EPA's
approval
of
these
SIP
credits
will
not
interfere
with
any
applicable
requirement
concerning
attainment
or
any
other
applicable
requirement
of
the
Act
and
the
credits
meet
and
comply
with
section
110(
l)
of
the
Act.
We
are
proposing
to
approve
the
NOx
emissions
reductions
achieved
by
the
EE
measures
as
credit
in
the
SIP
for
0.72
tpd
because
they
contribute
to
attainment
of
the
8­
hour
ozone
NAAQS,
are
permanent
and
surplus,
and
are
relied
upon
in
the
5%
IOP
plan.
We
propose
to
approve
these
NOx
emission
reductions
of
0.72
tpd
under
sections
110
and
part
D
of
the
Act.

3.
Alcoa
­
Milam
County
On
April
9,
2003,
a
Federal
Consent
Decree
was
signed
with
Alcoa
that
required
the
company
to
reduce
NOx
emissions
from
3
boilers
located
at
its
facility
in
Milam
County.
These
20
boilers
are
fired
by
locally
mined
lignite
coal
and
provide
power
for
the
aluminum
smelting
operations.
The
facility
is
located
nearly
120
miles
outside
of
the
DFW
nonattainment
area,
which
is
within
the
200
km
radius
for
NOx
emissions,
but
beyond
the
100
km
radius
for
VOCs.
Texas
chose
to
include
emission
reductions
for
just
one
of
the
boilers.
Although
Texas
submitted
NOx
reductions
of
3.9
tpd,
we
calculate
2.8
tpd
reduction
in
NOx
emissions
that
would
be
creditable
toward
the
5%
IOP
plan.
Today
we
are
proposing
to
approve
the
submission
of
the
federal
consent
decree
concerning
the
Alcoa
Rockdale,
Milam
County
facility,
as
described
in
the
SIP
Narrative
by
the
TCEQ,
into
the
Texas
SIP
as
a
part
of
the
5%
IOP
plan
for
the
purposes
of
establishing
the
quantifying
methodology,
the
implementation,
and
making
SIP­
enforceable
Alcoa's
choice,
as
defined
in
the
consent
decree,
to
shut
down
one
of
the
three
boilers
and
replace
one
of
the
two
remaining
boilers
with
a
circulating
fluidized
bed
(
CFB)
boiler
by
June
15,
2007
as
described
in
the
SIP
Narrative
by
the
TCEQ,
to
ultimately
achieve
SIP
credit
for
NOx
emissions
reductions
of
2.8
tpd.

To
receive
credit
for
reductions,
the
total
NOx
emissions
must
be
added
to
the
inventory
for
the
base
year.
Texas
therefore
added
23.17
tpd
of
NOx
emissions
to
the
2002
inventory
for
Alcoa
and
took
credit
for
NOx
reductions
of
3.9
tpd,
but
did
not
take
credit
for
VOC
reductions.

These
NOx
reductions
are
also
required
to
be
permanent,
enforceable,
quantifiable
and
surplus.

The
terms
of
the
federal
consent
decree
are
legally
enforceable
by
EPA.
Texas
issued
Permit
No.
48437
to
Alcoa
that
incorporates
the
terms
of
the
consent
decree,
so
the
reductions
are
also
enforceable
by
TCEQ.
The
consent
decree
and
State
Permit
contain
emission
limits
upon
which
to
quantify
the
emission
reductions.
Texas
included
NOx
emission
reductions
of
3.9
tpd
by
June
15,
2007.
21
The
terms
of
the
consent
decree
are
also
permanent.
The
consent
decree
remains
in
place
until
either
the
existing
boilers
achieve
and
maintain
certain
emission
limitations
for
24
months,

the
replacement
boilers
achieve
and
maintain
certain
emission
limitations
for
24
months,
or
the
existing
boilers
have
been
permanently
shut
down.
Additionally,
the
consent
decree
terminates
only
after
all
of
the
requirements
of
the
consent
decree,
including
those
mentioned
above,
are
incorporated
into
the
Title
V
operating
permit
for
the
Rockdale
facility.

The
NOx
reductions
are
surplus
to
the
State's
Regional
Ozone
plan,
relied
upon
in
all
of
the
Texas
ozone
nonattainment
areas
but
for
the
El
Paso
area,
and
which
required
a
50%

reduction
to
utility
NOx
emissions
in
the
selected
East
and
Central
Texas
counties,
a
30%
NOx
emission
reduction
to
non­
utility
grandfathered
sources
in
the
selected
East
and
Central
Texas
counties,
NOx
emissions
reductions
at
Alcoa,
Milam
County
and
Eastman
Chemical
Company
near
Longview,
Texas
through
Agreed
Orders,
and
NOx
emissions
reductions
through
a
statewide
water
heater
rule.
EPA
approved
the
Regional
Ozone
SIP
on
October
26,
2000,
at
65
FR
64148.
Some
of
the
NOx
reductions
obtained
through
compliance
with
the
federal
consent
decree
are
not
considered
surplus
and
are
not
creditable.
Alcoa
however,
agreed
in
the
federal
consent
decree
to
go
beyond
all
applicable
federal
requirements.
At
the
time
of
the
occurring
violations
addressed
in
the
federal
consent
decree,
Alcoa
as
a
lignite­
burning
facility
would
have
been
limited
to
0.6
lbs/
million
Btu.
A
review
of
the
Agreed
Order
approved
by
EPA
as
part
of
the
Regional
SIP
allowed
the
facility
0.8
lbs/
million
Btu
by
2002.
The
difference
between
0.8
and
0.6
lbs/
million
Btu
would
not
be
creditable.
Using
a
conservative
assumption
that
Alcoa
operated
at
0.8
lbs/
million
Btu
in
2002
and
recognizing
that
Alcoa
must
reduce
the
operating
rate
to
0.1
lbs/
million
Btu,
we
calculated
that
71%
of
the
reductions
reported
by
Texas
would
be
available
22
for
credit
(
71%
of
3.9
tpd).
Therefore,
EPA
proposes
to
approve
2.8
tpd
as
creditable
toward
the
5%
IOP.
Calculations
and
additional
detail
are
provided
in
the
TSD.

Approving
the
Alcoa
federal
consent
decree
into
the
DFW
SIP
for
establishing
and
making
enforceable
a
2.8
tpd
reduction
in
NOx
emissions
by
shutting
down
one
of
the
three
boilers
and
replacing
one
of
the
two
remaining
boilers
with
a
CFB
boiler
before
June
15,
2007,

improves
the
DFW
SIP
as
it
requires
the
affected
source
to
reduce
its
NOx
emissions
beyond
the
level
of
compliance
otherwise
required
by
law
and
to
incorporate
those
requirements
into
a
Title
V
operating
permit.
We
are
proposing
to
approve
these
revisions
to
the
Texas
SIP
because
they
will
contribute
to
attainment
of
the
8­
hour
ozone
NAAQS,
because
they
meet
the
EPA
rules
and
are
consistent
with
EPA
guidance,
and
were
one
of
the
control
measures
relied
upon
in
the
5%

IOP
plan.
As
such,
EPA's
approval
of
this
revision
will
not
interfere
with
any
applicable
requirement
concerning
attainment
or
any
other
applicable
requirement
of
the
Act
and
it
meets
and
complies
with
section
110(
l)
of
the
Act.
We
propose
to
approve
these
rules
under
section
110
and
part
D
of
the
Act.

4.
Stationary
Reciprocating
Internal
Combustion
Engines
On
May
13,
2005
the
TCEQ
Chairman
submitted
to
us
rule
revisions
to
30
TAC,
Chapter
117,
Control
of
Air
Pollution
From
Nitrogen
Compounds,
concerning
stationary
reciprocating
internal
combustion
(
IC)
engines
operating
within
the
DFW
eight­
hour
ozone
nonattainment
area
(
the
Chapter
117
SIP
submittal).
The
Chapter
117
SIP
submittal
primarily
addresses
NOx
emissions
from
IC
engines
with
a
horsepower
rating
greater
than
or
equal
to
300
hp
in
the
nine
Texas
Counties
of
Collin,
Dallas,
Denton,
Ellis,
Johnson,
Kaufman,
Parker,
Rockwall,
and
Tarrant.
The
affected
engines
under
the
Chapter
117
SIP
submittal
are
lean
burn,
rich
burn,
and
23
dual­
fuel
(
gas
and
liquid)
fired
lean
burn
engines.
The
rule
revisions
include
more
stringent
NOx
emissions
limitations
on
lean
burn
and
dual­
fuel
fired
lean
burn
IC
engines
operating
in
Collin,

Dallas,
Denton,
and
Tarrant
Counties
and
apply
the
limitations
to
those
engines
in
Ellis,
Johnson,

Kaufman,
Parker,
and
Rockwall
Counties.
They
also
impose
new
NOx
emissions
limitations
on
gas­
fired
rich
burn
IC
engines
in
all
nine
counties
of
the
DFW
8­
hour
ozone
nonattainment
area.

See
attachment
5
of
the
TSD
for
more
information.
The
Chapter
117
SIP
submittal
should
result
in
NOx
reductions
of
1.87
tpd
by
2007
for
the
DFW
eight­
hour
ozone
nonattainment
area.
Today,

we
are
proposing
to
approve
the
Chapter
117
SIP
submittal
as
part
of
the
5%
IOP
plan.

The
current
Texas
SIP
contains
no
Federally­
approved
requirements
for
controlling
NOx
emissions
from
gas­
fired
rich
burn,
and
gas­
fired
lean
burn
IC
engines
operating
within
Ellis,

Johnson,
Kaufman,
Parker,
and
Rockwall
counties.
By
approving
the
Chapter
117
SIP
submittal,

we
will
be
improving
the
Texas
SIP
for
enforcement
and
ozone
attainment
purposes.
As
such,

EPA's
approval
of
this
revision
will
not
interfere
with
any
applicable
requirement
concerning
attainment
or
any
other
applicable
requirement
of
the
Act
and
it
meets
and
complies
with
section
110(
l)
of
the
Act.

On
September
1,
2000
(
65
FR
53172),
EPA
approved
NOx
emission
specifications
for
IC
engines
as
a
part
of
the
ozone
control
measures
for
the
DFW
one­
hour
ozone
nonattainment
area
that
included
the
four
core
counties
­
Collin,
Dallas,
Denton,
and
Tarrant.
Table
4
contains
a
summary
of
the
65
FR
53172
rulemaking
for
IC
engines
operating
in
the
four
core
counties.

Table
4
­
Affected
Sources,
NOx
Emission
Specifications,
and
Additional
Information
24
Source
NOx
Emission
Specifications
Additional
information
Internal
Combustion
Engines
3.0
gram/
hp­
hr
Natural
gas,
lean
burn,
stationary,
capacity
$
300
hp
in
DFW.
Also
a
3.0
gram/
hp­
hr
limit
for
CO.

On
March
16,
2001
(
66
FR
15195),
EPA
approved
NOx
emission
specifications
for
IC
engines
as
part
of
the
ozone
control
measures
for
the
DFW
one­
hour
ozone
nonattainment
area
that
included
the
four
core
counties;
Table
5
is
a
summary
of
the
66
FR
15195
rulemaking
for
IC
engines
operating
in
the
four
core
counties.

Table
5
­
Affected
Sources,
NOx
Emission
Specification,
and
Additional
Information
Source
NOx
Emission
Specifications
Additional
information
Internal
Combustion
Engines
2.0
gram/
hp­
hr
Gas­
fired,
dual­
fuel
lean
burn
(
Collin,
Dallas,
Denton
and
Tarrant
Counties),
capacity
$
300
hp,
also
3.0
gram/
hp­
hr
for
CO.

The
area
in
Tables
4
and
5
refers
to
the
four
core
counties.
Table
6
contains
a
summary
of
NOx
control
requirements
for
IC
engines
operating
in
the
DFW
eight­
hour
ozone
nonattainment
area
under
the
Chapter
117
submittal
being
proposed
for
approval
today.

Table
6
­
Affected
Sources,
NOx
Emission
Specifications,
and
Additional
Information
Source
NOx
limit
Additional
information
Internal
Combustion
Engines
2.0
gram/
hp­
hr
Gas­
fired
lean
burn
(
Collin,
Dallas,
Denton,
Ellis,
Johnson,
Kaufman,
Parker,
Rockwall,
and
Tarrant
Counties),
capacity
$
300
hp,
also
3.0
gram/
hp­
hr
for
CO.
25
Source
NOx
limit
Additional
information
Internal
Combustion
Engines
2.0
gram/
hp­
hr
Gas­
fired
rich
burn
in
operation
before
January
2000
(
Collin,
Dallas,
Denton,
Ellis,
Johnson,
Kaufman,
Parker,
Rockwall
and
Tarrant
Counties),
capacity
$
300
hp,
also
3.0
gram/
hp­
hr
for
CO.

Internal
Combustion
Engines
0.5
gram/
hp­
hr
Gas­
fired
rich
burn
in
operation
after
January
2000
(
Collin,
Dallas,
Denton,
Ellis,
Johnson,
Kaufman,
Parker,
Rockwall
and
Tarrant
Counties),
capacity
$
300
hp,
also
3.0
gram/
hp­
hr
for
CO.

As
stated
earlier,
the
Chapter
117
SIP
submittal
should
result
in
NOx
reductions
of
1.87
tpd,
and
should
assist
in
bringing
the
DFW
area
into
attainment
with
the
8­
hour
ozone
NAAQS.

The
Chapter
117
SIP
submittal
requires
the
affected
sources
to
reduce
their
NOx
emissions.
We
are
proposing
to
approve
these
revisions
to
the
Texas
SIP
because
they
will
contribute
toward
attainment
of
the
8­
hour
ozone
NAAQS
and
were
one
of
the
control
measures
relied
upon
in
the
DFW
5%
IOP
Plan.
This
revision
adds
requirements
for
NOx
emission
limitations
for
rich
burn
IC
engines
in
all
nine
counties.
Additionally,
the
revisions
impose
a
more
stringent
NOx
emission
limitation
on
lean
burn
and
dual
fired
lean
burn
IC
engines
in
the
four
core
counties
and
extend
the
limitations
to
those
engines
in
the
five
adjacent
counties.
We
are
proposing
to
approve
these
rules
under
section
110
and
part
D
of
the
Act.

What
VOC
Control
Measures
Did
the
State
Submit?

1.
Statewide
Portable
Fuel
Container
Rule
The
TCEQ
adopted
regulations
for
portable
fuel
containers
sold
in
Texas
and
EPA
approved
the
rule,
published
February
10,
2005
(
70
FR
7041).
This
will
lower
VOC
emissions
26
from
portable
fuel
containers
by
an
estimated
2.79
tpd
within
the
nine­
county
nonattainment
area
and
0.63
tpd
for
counties
outside
of,
but
within
a
100
km
radius,
of
the
nine­
county
area.
As
discussed
earlier,
the
5%
guidance
allows
a
nonattainment
area
to
include
VOC
sources
within
100
km
of
the
nonattainment
area
in
calculations
of
IOP
reductions.
There
are
34
counties
outside
of
the
DFW
9­
county
area,
that
fall
within
100
km
of
the
nonattainment
area.
The
VOC
emissions
from
portable
fuel
containers
within
these
34
counties
are
added
to
the
DFW
area's
EI,
as
required
by
the
guidance;
these
emissions
are
4.52
tpd.
The
2002
baseline
EI
for
VOCs
is
459.15
tpd;
with
the
portable
fuel
container
emissions,
the
2002
EI
for
VOCs
is
adjusted
to
463.67
tpd.

The
total
VOC
emission
reductions
for
2007
are
projected
to
be
3.42
tpd.
Additional
detail
is
provided
in
70
FR
7041
and
the
TSD
for
this
action.

2.
Surface
Coating
Operations
Various
rules
for
surface
coating
operations
have
been
in
effect
for
the
four
core
counties
in
DFW,
to
meet
1­
hour
ozone
nonattainment
requirements.
The
State
adopted
a
rule
extending
the
requirements
for
surface
coatings
to
the
five
newly
designated
8­
hour
nonattainment
counties.

In
a
separate
action,
we
approved
Texas'
SIP
revision
to
extend
the
requirements
for
surface
coatings
to
the
five
newly
designated
nonattainment
counties,
published
January
19,
2006
(
71
FR
3009).
This
will
result
in
additional
VOC
reductions
of
0.3
tpd
for
the
area.
Additional
details
are
provided
in
71
FR
3009
and
the
TSD
for
this
action.

3.
Stage
I
Gasoline
Unloading
Rules
are
in
effect
for
Stage
I
vapor
recovery
during
gasoline
unloading
operations
in
the
four
core
counties,
with
an
exemption
for
operations
with
a
throughput
equal
to
or
less
than
10,000
gallons
per
month
(
gpm).
The
State
adopted
a
rule
revision
to
extend
these
requirements,
27
with
the
10,000
gpm
exemption,
to
the
five
newly
designated
nonattainment
counties.
In
a
separate
action,
we
approved
Texas'
SIP
revision
to
extend
Stage
I
requirements
to
the
five
newly
designated
nonattainment
counties,
published
January
19,
2006
(
71
FR
3009).
This
measure
will
result
in
VOC
reductions
of
2.09
tpd.
Additional
details
are
provided
in
71
FR
3009
and
the
TSD
for
this
action.

C.
Calculate
the
5%
Reduction
EPA's
5%
guidance
allows
the
reduction
to
be
made
with
all
VOC
emission
reductions,
all
NOx
reductions,
or
a
combination
of
VOC
and
NOx
reductions
that
equal
5%.
Texas
chose
to
meet
the
5%
requirement
by
applying
on
a
combination
of
VOC
and
NOx
reductions,
as
shown
in
Tables
7
and
8.

Table
7:
Sources
of
NOx
and
VOC
reductions
for
the
DFW
Area
SOURCE
OF
REDUCTIONS
NOx
(
tpd)
VOC
(
tpd)

Eligible
existing
measures
TERP
22.2
Portable
fuel
containers
(
in
DFW
9
county
area)
2.79
Portable
fuel
containers
(
within
100
km
radius)
0.63
Surface
coating
(
expand
to
5
new
counties)
0.3
Lower
Stage
I
exemption
to
10,000
gpm
(
expand
to
5
new
counties)
2.09
Subtotal
22.2
5.81
Proposed
measures
Alcoa
(
w/
in
200
km
radius)
2.8
28
Energy
Efficiency
0.72
Stationary
reciprocating
IC
engines
(
in
9
county
area)
1.87
Subtotal
5.39
Total
identified
reductions
(
add
subtotals)
27.59
5.81
The
reductions
submitted
for
new
VOC
and
NOx
measures
are
acceptable,
with
the
exception
of
the
amounts
for
Alcoa.
As
discussed
above,
we
reduced
the
Alcoa
NOx
credit
from
3.9
tpd
to
2.8
tpd.

Table
8:
Calculation
of
the
Adjusted
2002
Emissions
Inventory
Variables
to
Calculate
the
Adjusted
EI
VOC
(
tpd)
NOx
(
tpd)

2002
baseline
inventory
459.15
599.02
Alcoa
(
within
200
km
radius)
+
23.20
Portable
fuel
containers
(
within
100
km
radius)
+
4.52
Adjusted
2002
baseline
EI
463.67
622.22
The
2002
baseline
inventory
is
adjusted
by
adding
the
NOx
emissions
from
Alcoa
and
VOC
emissions
from
the
portable
fuel
container
rule.
The
adjusted
baseline
EI
is
the
basis
for
performing
the
5%
reduction
calculations.
As
shown
in
Table
8,
the
adjusted
baseline
inventory
for
VOC
is
463.67
tpd
and
622.22
tpd
for
NOx.
The
VOC
control
strategy
reductions
provide
5.81
tpd,
which
is
1.25%
of
the
adjusted
2002
baseline
for
VOCs.
The
NOx
reductions
provide
27.59
tpd,
which
is
4.43%
of
the
adjusted
2002
baseline
for
NOx.
Per
the
5%
guidance,
the
sum
of
the
percentage
of
the
VOC
reductions
planned
and
the
percentage
of
the
NOx
reductions
29
planned
must
equal
5%.
In
this
case,
the
sum
of
1.25%
+
4.43%
=
5.68%,
which
meets
the
requirement
and
has
a
small
surplus
of
0.68%.
Table
9
shows
the
2007
target
emission
levels.

Table
9:
Calculation
of
2007
Emission
Levels,
Adjusted
to
Meet
the
5%
Target
Variables
to
Calculate
the
Adjusted
EI
VOC
(
tpd)
NOx
(
tpd)

2007
inventory
405.05
450.71
Reductions
proposed
to
meet
5%
­
5.81
­
27.59
Adjusted
2007
emission
levels
399.24
423.12
Per
EPA's
5%
guidance,
states
should
ensure
that
the
projected
2007
EI
is
at
least
5%

less
than
the
2002
EI.
When
5%
is
subtracted
from
each
of
the
adjusted
2002
inventories,
the
emissions
for
VOCs
are
440.49
tpd
and
emissions
for
NOx
are
591.11
tpd.
The
2007
target
emission
levels
are
lower
(
shown
in
Table
10)
and
therefore
meet
the
5%
guidance.
This
SIP
revision
demonstrates
that
the
target
level
will
be
met
and
Texas
has
met
the
5%
increment
of
emission
reduction.

Table
10:
DFW
Emission
Reductions,
from
2002
to
2007
Pollutant
Adjusted
2002
EI
Adjusted
2002
EI,
minus
5%
Adjusted
2007
EI
VOC
(
tpd)
463.67
440.49
399.24
NOx
(
tpd)
622.22
591.11
423.12
Our
analyses
of
the
measures
submitted
and
the
calculation
of
reductions
indicate
that
the
State
has
satisfied
the
requirements
of
the
5%
Increment
of
Progress
Plan.
30
V.
Proposed
Action
We
are
proposing
to
approve
revisions
to
the
SIP
submitted
by
the
state
of
Texas
for
the
DFW
nonattainment
area
as
meeting
1­
hour
ozone
serious
area
requirements.
We
are
proposing
to
approve
the
5%
IOP
plan,
the
revisions
to
the
2002
base
year
emissions
inventory,
the
2007
motor
vehicle
emissions
budget,
a
federal
consent
decree
concerning
an
Alcoa
plant
in
Rockdale,

Milam
County,
energy
efficiency
measures,
and
revisions
to
30
TAC,
Chapter
117,
Control
of
Air
Pollution
From
Nitrogen
Compounds,
concerning
stationary
reciprocating
IC
engines
operating
within
the
DFW
8­
hour
ozone
nonattainment
area
and
incorporate
these
revisions
into
the
Texas
SIP.
Although
we
are
not
reopening
the
comment
period
on
RACT,
we
intend
to
finalize
our
proposed
approval
that
RACT
is
in
place
for
all
major
sources
of
VOCs
in
the
DFW
area
in
the
final
rulemaking
for
this
proposal.
We
have
evaluated
these
revisions
and
determined
that
they
are
consistent
with
the
requirements
of
the
Act
and
EPA's
regulations,
guidance
and
policy.
These
revisions
fulfill
the
outstanding
attainment
demonstration
obligation
for
the
1­
hour
ozone
standard
in
the
DFW
nonattainment
area
and
the
outstanding
obligation
to
adopt
and
implement
all
applicable
requirements
under
the
1­
hour
ozone
standard.
We
propose
to
approve
these
rules
under
section
110
and
part
D
of
the
Act
and
EPA's
regulations.

EPA
is
soliciting
public
comments
on
the
issues
discussed
in
this
proposed
rulemaking.

These
comments
will
be
considered
before
EPA
takes
final
action.
Interested
parties
may
participate
in
the
Federal
rulemaking
procedure
by
submitting
written
comments
to
the
EPA
Regional
Office
listed
in
the
ADDRESSES
section
of
this
proposed
rulemaking,
or
by
submitting
comments
electronically,
by
mail,
or
through
hand
delivery/
courier
following
the
directions
provided
in
the
ADDRESSES
section
of
this
action.
31
VI.
Statutory
and
Executive
Order
Reviews
Under
Executive
Order
12866
(
58
FR
51735,
October
4,
1993),
this
proposed
action
is
not
a
"
significant
regulatory
action"
and
therefore
is
not
subject
to
review
by
the
Office
of
Management
and
Budget.
For
this
reason,
this
action
is
also
not
subject
to
Executive
Order
13211,
"
Actions
Concerning
Regulations
That
Significantly
Affect
Energy
Supply,
Distribution,

or
Use"
(
66
FR
28355,
May
22,
2001).
This
proposed
action
merely
proposes
to
approve
state
law
as
meeting
Federal
requirements
and
imposes
no
additional
requirements
beyond
those
imposed
by
state
law.
Accordingly,
the
Administrator
certifies
that
this
proposed
rule
will
not
have
a
significant
economic
impact
on
a
substantial
number
of
small
entities
under
the
Regulatory
Flexibility
Act
(
5
U.
S.
C.
601
et
seq.).
Because
this
rule
proposes
to
approve
pre­
existing
requirements
under
state
law
and
does
not
impose
any
additional
enforceable
duty
beyond
that
required
by
state
law,
it
does
not
contain
any
unfunded
mandate
or
significantly
or
uniquely
affect
small
governments,
as
described
in
the
Unfunded
Mandates
Reform
Act
of
1995
(
Public
Law
104­
4).

This
proposed
rule
also
does
not
have
tribal
implications
because
it
will
not
have
a
substantial
direct
effect
on
one
or
more
Indian
tribes,
on
the
relationship
between
the
Federal
Government
and
Indian
tribes,
or
on
the
distribution
of
power
and
responsibilities
between
the
Federal
Government
and
Indian
tribes,
as
specified
by
Executive
Order
13175
(
65
FR
67249,

November
9,
2000).
This
action
also
does
not
have
Federalism
implications
because
it
does
not
have
substantial
direct
effects
on
the
States,
on
the
relationship
between
the
national
government
and
the
States,
or
on
the
distribution
of
power
and
responsibilities
among
the
various
levels
of
government,
as
specified
in
Executive
Order
13132
(
64
FR
43255,
August
10,
1999).
This
action
32
merely
proposes
to
approve
a
state
rule
implementing
a
Federal
standard,
and
does
not
alter
the
relationship
or
the
distribution
of
power
and
responsibilities
established
in
the
Clean
Air
Act.
This
proposed
rule
also
is
not
subject
to
Executive
Order
13045
"
Protection
of
Children
from
Environmental
Health
Risks
and
Safety
Risks"
(
62
FR
19885,
April
23,
1997),
because
it
is
not
economically
significant.

In
reviewing
SIP
submissions,
EPA's
role
is
to
approve
state
choices,
provided
that
they
meet
the
criteria
of
the
Clean
Air
Act.
In
this
context,
in
the
absence
of
a
prior
existing
requirement
for
the
State
to
use
voluntary
consensus
standards
(
VCS),
EPA
has
no
authority
to
disapprove
a
SIP
submission
for
failure
to
use
VCS.
It
would
thus
be
inconsistent
with
applicable
law
for
EPA,
when
it
reviews
a
SIP
submission,
to
use
VCS
in
place
of
a
SIP
submission
that
otherwise
satisfies
the
provisions
of
the
Clean
Air
Act.
Thus,
the
requirements
of
section
12(
d)
of
the
National
Technology
Transfer
and
Advancement
Act
of
1995
(
15
U.
S.
C.
272
note)
do
not
apply.
This
proposed
rule
does
not
impose
an
information
collection
burden
under
the
provisions
of
the
Paperwork
Reduction
Act
of
1995
(
44
U.
S.
C.
3501
et
seq.).

List
of
Subjects
in
40
CFR
Part
52
Environmental
protection,
Air
pollution
control,
Nitrogen
dioxide,
Ozone,
Volatile
Organic
Compounds,
Intergovernmental
relations,
Reporting
and
record
keeping
requirements.

Authority:
42
U.
S.
C.
7401
et
seq.

Dated:
August
10,
2006.

Richard
E.
Greene,
33
Regional
Administrator,
Region
6.