500
centroidal
area
and
in
the
direction
of
any
expected
stratification.
Locate
three
traverse
points
at
16.7,
50.0
and
83.3
percent
of
the
measurement
line
and
sample
from
each
of
these
three
points
during
each
run,
or
follow
the
procedure
in
section
8.3.2
to
verify
whether
stratification
does
or
does
not
exist.

8.3.2
Stratification
Verification.
The
presence
or
absence
of
stratification
can
be
verified
by
using
the
following
procedure.
While
the
facility
is
operating
normally,
initiate
tracer
gas
release
into
the
enclosure.
For
rectangular
ducts,
locate
at
least
nine
sample
points
in
the
cross
section
such
that
the
sample
points
are
the
centroids
of
similarly­
shaped,
equal
area
divisions
of
the
cross
section.
Measure
the
tracer
gas
concentration
at
each
point.
Calculate
the
mean
value
for
all
sample
points.
For
circular
ducts,
conduct
a
12­
point
traverse
(
i.
e.,
six
points
on
each
of
the
two
perpendicular
diameters)
locating
the
sample
points
as
described
in
40
CFR
part
60,
appendix
A,
Method
1.
Perform
the
measurements
and
calculations
as
described
above.
Determine
if
the
mean
pollutant
concentration
is
more
than
10
percent
different
from
any
single
point.
If
so,
the
cross
section
is
considered
to
be
stratified,
and
the
tester
may
not
use
a
single
sample
point
location,
but
must
use
the
three
traverse
points
at
16.7,
50.0,
and
83.3
percent
of
the
entire
measurement
line.
Other
traverse
points
may
be
selected,
provided
that
they
can
be
shown
to
the
satisfaction
of
the
Administrator
to
provide
a
representative
sample
over
the
stack
or
duct
cross
section.

8.4
CD
Inlet
Gas
Flow
Rate
Measurements.
The
procedures
of
EPA
Methods
1­
4
(
40
CFR
part
60,
appendix
A)
are
used
to
determine
the
CD
inlet
gas
flow
rate.
Molecular
weight
(
Method
3)
and
moisture
(
Method
4)
determinations
are
only
required
once
for
each
test
series.
However,
if
the
test
series
is
not
completed
within
24
hours,
then
the
molecular
weight
and
moisture
measurements
should
be
repeated
daily.
As
a
minimum,
velocity
measurements
are
conducted
according
to
the
procedures
of
Methods
1
and
2
before
and
after
each
test
run,
as
close
to
the
start
and
end
of
the
run
as
practicable.
A
velocity
measurement
between
two
runs
satisfies
both
the
criterion
of
"
after"
the
run
just
completed
and
"
before"
the
run
to
be
initiated.
Accurate
exhaust
gas
flow
rate
measurements
are
critical
to
the
success
of
this
procedure.
If
significant
temporal
variations
of
flow
rate
are
anticipated
during
the
test
run
under
normal
process
operating
conditions,
take
appropriate
steps
to
accurately
measure
the
flow
rate
during
the
test.
501
Examples
of
steps
that
might
be
taken
include:
1)
conducting
additional
velocity
traverses
during
the
test
run;
or
2)
continuously
monitoring
a
single
point
of
average
velocity
during
the
run
and
using
these
data,
in
conjunction
with
the
pre­
and
post­
test
traverses,
to
calculate
an
average
velocity
for
the
test
run.

8.5
Tracer
Gas
Measurement
Procedure.

8.5.1
Calibration
Error
Test.
Immediately
prior
to
the
emission
test
(
within
2
hours
of
the
start
of
the
test),
introduce
zero
gas
and
high­
level
calibration
gas
at
the
calibration
valve
assembly.
Zero
and
calibrate
the
analyzer
according
to
the
manufacturer's
procedures
using,
respectively,
nitrogen
and
the
calibration
gases.
Calculate
the
predicted
response
for
the
low­
level
and
mid­
level
gases
based
on
a
linear
response
line
between
the
zero
and
highlevel
response.
Then
introduce
the
low­
level
and
mid­
level
calibration
gases
successively
to
the
measurement
system.
Record
the
analyzer
responses
for
the
low­
level
and
midlevel
calibration
gases
and
determine
the
differences
between
the
measurement
system
responses
and
the
predicted
responses
using
the
equation
in
section
12.3.
These
differences
must
be
less
than
5
percent
of
the
respective
calibration
gas
value.
If
not,
the
measurement
system
must
be
replaced
or
repaired
prior
to
testing.
No
adjustments
to
the
measurement
system
shall
be
conducted
after
the
calibration
and
before
the
drift
determination
(
section
8.5.4).
If
adjustments
are
necessary
before
the
completion
of
the
test
series,
perform
the
drift
checks
prior
to
the
required
adjustments
and
repeat
the
calibration
following
the
adjustments.
If
multiple
electronic
ranges
are
to
be
used,
each
additional
range
must
be
checked
with
a
mid­
level
calibration
gas
to
verify
the
multiplication
factor.
Note:
If
using
an
FTIR
for
the
analytical
instrument,
you
may
choose
to
follow
the
pretest
preparation,
evaluation,
and
calibration
procedures
of
Method
320
(
section
8.0)
(
40
CFR
part
63,
appendix
A)
in
lieu
of
the
above
procedure.

8.5.2
Response
Time
Test.
Conduct
this
test
once
prior
to
each
test
series.
Introduce
zero
gas
into
the
measurement
system
at
the
calibration
valve
assembly.
When
the
system
output
has
stabilized,
switch
quickly
to
the
high­
level
calibration
gas.
Record
the
time
from
the
concentration
change
to
the
measurement
system
response
equivalent
to
95
percent
of
the
step
change.
Repeat
the
test
three
times
and
average
the
results.
502
8.5.3
SF6
Measurement.
Sampling
of
the
enclosure
exhaust
gas
at
the
inlet
to
the
CD
should
begin
at
the
onset
of
tracer
gas
release.
If
necessary,
adjust
the
tracer
gas
injection
rate
such
that
the
measured
tracer
gas
concentration
at
the
CD
inlet
is
within
the
spectrometer's
calibration
range
(
i.
e.,
between
the
MML
and
the
span
value).
Once
the
tracer
gas
concentration
reaches
equilibrium,
the
SF6
concentration
should
be
measured
using
the
infrared
spectrometer
continuously
for
at
least
20
minutes
per
run.
Continuously
record
(
i.
e.,
record
at
least
once
per
minute)
the
concentration.
Conduct
at
least
three
test
runs.
On
the
recording
chart,
in
the
data
acquisition
system,
or
in
a
log
book,
make
a
note
of
periods
of
process
interruption
or
cyclic
operation
such
as
the
cycles
of
the
hot
press
operation.
Table
1
to
this
appendix
summarizes
the
physical
measurements
required
for
the
enclosure
testing.

Note:
If
a
GC/
ECD
is
used
as
the
analytical
instrument,
a
continuous
record
(
at
least
once
per
minute)
likely
will
not
be
possible;
make
a
minimum
of
five
injections
during
each
test
run.
Also,
the
minimum
test
run
duration
criterion
of
20
minutes
applies.

8.5.4
Drift
Determination.
Immediately
following
the
completion
of
the
test
run,
reintroduce
the
zero
and
mid­
level
calibration
gases,
one
at
a
time,
to
the
measurement
system
at
the
calibration
valve
assembly.
(
Make
no
adjustments
to
the
measurement
system
until
both
the
zero
and
calibration
drift
checks
are
made.)
Record
the
analyzer
responses
for
the
zero
and
mid­
level
calibration
gases
and
determine
the
difference
between
the
instrument
responses
for
each
gas
prior
to
and
after
the
emission
test
run
using
the
equation
in
section
12.4.
If
the
drift
values
exceed
the
specified
limits
(
section
13),
invalidate
the
test
results
preceding
the
check
and
repeat
the
test
following
corrections
to
the
measurement
system.
Alternatively,
recalibrate
the
test
measurement
system
as
in
section
8.5.1
and
report
the
results
using
both
sets
of
calibration
data
(
i.
e.,
data
determined
prior
to
the
test
period
and
data
determined
following
the
test
period).
Note:
If
using
an
FTIR
for
the
analytical
instrument,
you
may
choose
to
follow
the
post­
test
calibration
procedures
of
Method
320
in
appendix
A
to
40
CFR
part
63
(
section
8.11.2)
in
lieu
of
the
above
procedures.

8.6
Ambient
Air
Sampling
(
Optional).
Sampling
the
ambient
air
surrounding
the
enclosure
is
optional.
However,
taking
these
samples
during
the
capture
efficiency
testing
503
will
identify
those
areas
of
the
enclosure
that
may
be
performing
less
efficiently.

8.6.1
Location
of
Ambient
Samples
Outside
the
Enclosure
(
Optional).
In
selecting
the
sampling
locations
for
collecting
samples
of
the
ambient
air
surrounding
the
enclosure,
consider
potential
leak
points,
the
direction
of
the
release,
and
laminar
flow
characteristics
in
the
area
surrounding
the
enclosure.
Samples
should
be
collected
from
all
sides
of
the
enclosure,
downstream
in
the
prevailing
room
air
flow,
and
in
the
operating
personnel
occupancy
areas.

8.6.2
Collection
of
Ambient
Samples
(
Optional).
During
the
tracer
gas
release,
collect
ambient
samples
from
the
area
surrounding
the
enclosure
perimeter
at
predetermined
location
using
disposable
syringes
or
some
other
type
of
containers
that
are
non­
absorbent,
inert,
and
that
have
low
permeability
(
i.
e.,
polyvinyl
fluoride
film
or
polyester
film
sample
bags
or
polyethylene,
polypropylene,
nylon
or
glass
bottles).
The
use
of
disposable
syringes
allows
samples
to
be
injected
directly
into
a
gas
chromatograph.
Concentration
measurements
taken
around
the
perimeter
of
the
enclosure
provide
evidence
of
capture
performance
and
will
assist
in
the
identification
of
those
areas
of
the
enclosure
that
are
performing
less
efficiently.

8.6.3
Analysis
and
Storage
of
Ambient
Samples
(
Optional).
Analyze
the
ambient
samples
using
an
analytical
instrument
calibrated
and
operated
according
to
the
procedures
in
this
appendix
or
ASTM
E
260
and
ASTM
E
697.
Samples
may
be
analyzed
immediately
after
a
sample
is
taken,
or
they
may
be
stored
for
future
analysis.
Experience
has
shown
no
degradation
of
concentration
in
polypropylene
syringes
when
stored
for
several
months
as
long
as
the
needle
or
syringe
is
plugged.
Polypropylene
syringes
should
be
discarded
after
one
use
to
eliminate
the
possibility
of
cross
contamination
of
samples.

9.0
Quality
Control.

9.1
Sampling,
System
Leak
Check.
A
sampling
system
leak
check
should
be
conducted
prior
to
and
after
each
test
run
to
ensure
the
integrity
of
the
sampling
system.

9.2
Zero
and
Calibration
Drift
Tests.

Section
Quality
Control
Measure
Effect
504
8.5.4
Zero
and
calibration
drift
tests.
Ensures
that
bias
introduced
by
drift
in
the
measurement
system
output
during
the
run
is
no
greater
than
3
percent
of
span.

10.0
Calibration
and
Standardization.

10.1
Control
Device
Inlet
Air
Flow
Rate
Measurement
Equipment.
Follow
the
equipment
calibration
requirements
specified
in
Methods
2,
3,
and
4
(
appendix
A
to
40
CFR
part
60)
for
measuring
the
velocity,
molecular
weight,
and
moisture
of
the
control
device
inlet
air.

10.2
Tracer
Gas
Injection
Rate.
A
dry
gas
volume
flow
meter,
mass
flow
meter,
or
orifice
can
be
used
to
measure
the
tracer
gas
injection
flow
rate.
The
selected
flow
measurement
device
must
have
an
accuracy
of
greater
than
±
5
percent
at
the
field
operating
range.
Prior
to
the
test,
verify
the
calibration
of
the
selected
flow
measurement
device
using
either
a
wet
test
meter,
spirometer,
or
liquid
displacement
meter
as
the
calibration
device.
Select
a
minimum
of
two
flow
rates
to
bracket
the
expected
field
operating
range
of
the
flow
meter.
Conduct
three
calibration
runs
at
each
of
the
two
selected
flow
rates.
For
each
run,
note
the
exact
quantity
of
gas
as
determined
by
the
calibration
standard
and
the
gas
volume
indicated
by
the
flow
meter.
For
each
flow
rate,
calculate
the
average
percent
difference
of
the
indicated
flow
compared
to
the
calibration
standard.

10.3
Spectrometer.
Follow
the
calibration
requirements
specified
by
the
equipment
manufacturer
for
infrared
spectrometer
measurements
and
conduct
the
pretest
calibration
error
test
specified
in
section
8.5.1.
Note:
if
using
an
FTIR
analytical
instrument
see
Method
320,
section
10
(
appendix
A
to
40
CFR
part
63).

10.4
Gas
Chromatograph.
Follow
the
pre­
test
calibration
requirements
specified
in
section
8.5.1.

10.4
Gas
Chromatograph
for
Ambient
Sampling
(
Optional).
For
the
optional
ambient
sampling,
follow
the
calibration
requirements
specified
in
section
8.5.1
or
ASTM
E
260
and
E
697
and
by
the
equipment
manufacturer
for
gas
505
chromatograph
measurements.

11.0
Analytical
Procedures.

The
sample
collection
and
analysis
are
concurrent
for
this
method
(
see
section
8.0).

12.0
Calculations
and
Data
Analysis.

12.1
Estimate
MML
and
Span.
The
MML
is
the
minimum
measurement
level.
The
selection
of
this
level
is
at
the
discretion
of
the
tester.
However,
the
MML
must
be
higher
than
the
low­
level
calibration
standard,
and
the
tester
must
be
able
to
measure
at
this
level
with
a
precision
of

10
percent.
As
an
example,
select
the
MML
as
10
times
the
instrument's
published
detection
limit.
The
detection
limit
of
one
instrument
is
0.01
parts
per
million
by
volume
(
ppmv).
Therefore,
the
MML
would
be
0.10
ppmv.
Select
the
low­
level
calibration
standard
as
0.08
ppmv.
The
high­
level
standard
would
be
four
times
the
low­
level
standard
or
0.32
ppmv.
A
reasonable
mid­
level
standard
would
then
be
0.20
ppmv
(
halfway
between
the
low­
level
standard
and
the
highlevel
standard).
Finally,
the
span
value
would
be
approximately
0.40
ppmv
(
the
high­
level
value
is
80
percent
of
the
span).
In
this
example,
the
following
MML,
calibration
standards,
and
span
values
would
apply:
MML
=
0.10
ppmv
Low­
level
standard
=
0.08
ppmv
Mid­
level
standard
=
0.20
ppmv
High­
level
standard
=
0.32
ppmv
Span
value
=
0.40
ppmv
12.2
Estimate
Tracer
Gas
Injection
Rate
for
the
Given
Span.
To
estimate
the
minimum
and
maximum
tracer
gas
injection
rate,
assume
a
worst
case
capture
efficiency
of
80
percent,
and
calculate
the
tracer
gas
flow
rate
based
on
known
or
measured
parameters.
To
estimate
the
minimum
tracer
gas
injection
rate,
assume
that
the
MML
concentration
(
10
times
the
IR
detection
limit
in
this
example)
is
desired
at
the
measurement
location.
The
following
equation
can
be
used
to
estimate
the
minimum
tracer
gas
injection
rate:

((
QT­
MIN
x
0.8)/
QE)
x
(
CT
÷
100)
x
106
=
MML
QT­
MIN
=
1.25
x
MML
x
(
QE/
CT)
x
10­
4
Where:
QT­
MIN
=
minimum
volumetric
flow
rate
of
tracer
gas
injected,
standard
cubic
feet
per
minute
(
scfm);
506
QE
=
volumetric
flow
rate
of
exhaust
gas,
scfm;
CT
=
Tracer
gas
(
SF6)
concentration
in
gas
blend,
percent
by
volume;
MML
=
minimum
measured
level,
ppmv
=
10
x
IRDL
(
for
this
example);
IRDL
=
IR
detection
limit,
ppmv.

Standard
conditions:
20

C,
760
millometers
of
mercury
(
mm
Hg).

To
estimate
the
maximum
tracer
gas
injection
rate,
assume
that
the
span
value
is
desired
at
the
measurement
location.
The
following
equation
can
be
used
to
estimate
the
maximum
tracer
gas
injection
rate:

((
QT­
MAX
x
0.8)/
QE)
x
(
CT
÷
100)
x
106
=
span
value
QT­
MAX
=
1.25
x
span
value
x
(
QE/
CT)
x
10­
4
Where:
QT­
MAX
=
maximum
volumetric
flow
rate
of
tracer
gas
injected,
scfm;
Span
value
=
instrument
span
value,
ppmv.

The
following
example
illustrates
this
calculation
procedure:

Find
the
range
of
volumetric
flow
rate
of
tracer
gas
to
be
injected
when
the
following
parameters
are
known:

QE
=
60,000
scfm
(
typical
exhaust
gas
flow
rate
from
an
enclosure);
CT
=
2
percent
SF6
in
nitrogen;
IRDL
=
0.01
ppmv
(
per
manufacturer's
specifications);
MML
=
10
x
IRDL
=
0.10
ppmv;
Span
value
=
0.40
ppmv;
QT
=
?

Minimum
tracer
gas
volumetric
flow
rate:
QT­
MIN
=
1.25
x
MML
x
(
QE/
CT)
x
10­
4
QT­
MIN
=
1.25
x
0.10
x
(
60,000/
2)
x
10­
4
=
0.375
scfm
Maximum
tracer
gas
volumetric
flow
rate:
QT­
MAX
=
1.25
x
span
value
x
(
QE/
CT)
x
10­
4
QT­
MAX
=
1.25
x
0.40
x
(
60,000/
2)
x
10­
4
=
1.5
scfm
In
this
example,
the
estimated
total
volumetric
flow
rate
of
the
two
percent
SF6
tracer
gas
injected
through
the
507
manifolds
in
the
enclosure
lies
between
0.375
and
1.5
scfm.

12.3
Calibration
Error.
Calculate
the
calibration
error
for
the
low­
level
and
mid­
level
calibration
gases
using
the
following
equation:

Err
=
|
Cstd
­
Cmeas|
÷
Cstd
x
100
Where:
Err
=
calibration
error,
percent;
Cstd
=
low­
level
or
mid­
level
calibration
gas
value,
ppmv;
Cmeas
=
measured
response
to
low­
level
or
mid­
level
concentration
gas,
ppmv.

12.4
Calibration
Drift.
Calculate
the
calibration
drift
for
the
zero
and
low­
level
calibration
gases
using
the
following
equation:

D
=
|
Cinitial
­
Cfinal|
÷
Cspan
x
100
Where:
D
=
calibration
drift,
percent;
Cinitial
=
low­
level
or
mid­
level
calibration
gas
value
measured
before
test
run,
ppmv;
Cfinal
=
low­
level
or
mid­
level
calibration
gas
value
measured
after
test
run,
ppmv;
Cspan
=
span
value,
ppmv.

12.5
Calculate
Capture
Efficiency.
The
equation
to
calculate
enclosure
capture
efficiency
is
provided
below:

CE
=
(
SF6­
CD
÷
SF6­
INJ)
x
100
Where:
CE
=
capture
efficiency;
SF6­
CD
=
mass
of
SF6
measured
at
the
inlet
to
the
CD;
SF6­
INJ
=
mass
of
SF6
injected
from
the
tracer
source
into
the
enclosure.

Calculate
the
CE
for
each
of
the
initial
three
test
runs.
Then
follow
the
procedures
outlined
in
section
12.6
to
calculate
the
overall
capture
efficiency.

12.6
Calculate
Overall
Capture
Efficiency.
After
calculating
the
capture
efficiency
for
each
of
the
initial
three
test
runs,
follow
the
procedures
in
40
CFR
part
63,
508
subpart
KK,
appendix
A,
to
determine
if
the
results
of
the
testing
can
be
used
in
determining
compliance
with
the
requirements
of
the
rule.
There
are
two
methods
that
can
be
used:
the
DQO
and
LCL
methods.
The
DQO
method
is
described
in
section
3
of
40
CFR
part
63,
subpart
KK,
appendix
A,
and
provides
a
measure
of
the
precision
of
the
capture
efficiency
testing
conducted.
Section
3
of
40
CFR
part
63,
subpart
KK,
appendix
A,
provides
an
example
calculation
using
results
from
a
facility.
If
the
DQO
criteria
are
met
using
the
first
set
of
three
test
runs,
then
the
facility
can
use
the
average
capture
efficiency
of
these
test
results
to
determine
the
capture
efficiency
of
the
enclosure.
If
the
DQO
criteria
are
not
met,
then
the
facility
can
conduct
another
set
of
three
runs
and
run
the
DQO
analysis
again
using
the
results
from
the
six
runs
OR
the
facility
can
elect
to
use
the
LCL
approach.

The
LCL
method
is
described
in
section
4
of
40
CFR
part
63,
subpart
KK,
appendix
A,
and
provides
sources
that
may
be
performing
much
better
than
their
regulatory
requirement,
a
screening
option
by
which
they
can
demonstrate
compliance.
The
LCL
approach
compares
the
80
percent
lower
confidence
limit
for
the
mean
measured
CE
value
to
the
applicable
regulatory
requirement.
If
the
LCL
capture
efficiency
is
higher
than
the
applicable
limit,
then
the
facility
is
in
initial
compliance
and
would
use
the
LCL
capture
efficiency
as
the
capture
efficiency
to
determine
compliance.
If
the
LCL
capture
efficiency
is
lower
than
the
applicable
limit,
then
the
facility
must
perform
additional
test
runs
and
rerun
the
DQO
or
LCL
analysis.

13.0
Method
Performance.

13.1
Measurement
System
Performance
Specifications.

13.1.1
Zero
Drift.
Less
than
±
3
percent
of
the
span
value.

13.1.2
Calibration
Drift.
Less
than
±
3
percent
of
the
span
value.

13.1.3
Calibration
Error.
Less
than
±
5
percent
of
the
calibration
gas
value.

13.2
Flow
Measurement
Specifications.
The
mass
flow,
volumetric
flow,
or
critical
orifice
control
meter
used
should
have
an
accuracy
of
greater
than
±
5
percent
at
the
flow
rate
used.

13.3
Calibration
and
Tracer
Gas
Specifications.
The
509
manufacturer
of
the
calibration
and
tracer
gases
should
provide
a
recommended
shelf
life
for
each
calibration
gas
cylinder
over
which
the
concentration
does
not
change
more
than
±
2
percent
from
the
certified
value.

14.0
Pollution
Prevention
[
Reserved].

15.0
Waste
Management
[
Reserved].

16.0
References.

1.
40
CFR
part
60,
appendix
A,
EPA
Method
1
 
Sample
and
velocity
traverses
for
stationary
sources.

2.
40
CFR
part
60,
appendix
A,
EPA
Method
2
 
Determination
of
stack
gas
velocity
and
volumetric
flow
rate.

3.
40
CFR
part
60,
appendix
A,
EPA
Method
3
 
Gas
analysis
for
the
determination
of
dry
molecular
weight.

4.
40
CFR
part
60,
appendix
A,
EPA
Method
4
 
Determination
of
moisture
content
in
stack
gases.

5.
SEMI
F15­
93
Test
Method
for
Enclosures
Using
Sulfur
Hexafluoride
Tracer
Gas
and
Gas
Chromotography.

6.
Memorandum
from
John
S.
Seitz,
Director,
Office
of
Air
Quality
Planning
and
Standards,
to
EPA
Regional
Directors,
Revised
Capture
Efficiency
Guidance
for
Control
of
Volatile
Organic
Compound
Emissions,
February
7,
1995.
(
That
memorandum
contains
an
attached
technical
document
from
Candace
Sorrell,
Emission
Monitoring
and
Analysis
Division,
"
Guidelines
for
Determining
Capture
Efficiency,"
January
9,
1994).

7.
Technical
Systems
Audit
of
Testing
at
Plant
"
C,"
EPA­
454/
R­
00­
26,
May
2000.

8.
Material
Safety
Data
Sheet
for
SF6.
Air
Products
and
Chemicals,
Inc.
Website:
www3.
airproducts.
com.
October
2001.

17.0
Tables,
Diagrams,
Flowcharts,
and
Validation
Data.
510
Table
1
to
Appendix
A
to
Subpart
DDDD
of
40
CFR
Part
63.
Summary
of
Critical
Physical
Measurements
for
Enclosure
Testing
Measurement
Measurement
instrumentation
Measurement
frequency
Measurement
site
Tracer
gas
injection
rate
Mass
flow
meter,
volumetric
flow
meter
or
critical
orifice
Continuous
Injection
manifolds
(
cylinder
gas)

Tracer
gas
concentration
at
control
device
inlet
Infrared
Spectrometer
or
GC/
ECD
Continuous
(
at
least
one
reading
per
minute)
for
a
minimum
of
20
minutes
Inlet
duct
to
the
control
device
(
outlet
duct
of
enclosure)

Volumetric
air
flow
rate
EPA
Methods
1,
2,
3,
4
(
40
CFR
part
60,
appendix
A)
°
Velocity
sensor
(
Manometer/
Pitot
tube)
°
Thermocouple
°
Midget
Impinger
sampler
°
Orsat
or
Fyrite
Each
test
run
for
velocity
(
minimum);
Daily
for
moisture
and
molecular
weight
Inlet
duct
to
the
control
device
(
outlet
duct
of
enclosure)
511
Hot
Press
Loader
SF
6
Source
Flowmeter
Unloader
SF
6
Source
Flowmeter
See
Figure
2
for
typical
manifold
detail
Figure
1.
Plan
view
schematic
of
hot
press
and
enclosure
showing
SF6
manifold
locations.
512
(
3)
1/
4"
holes
every
8"
4"
sch.
40
pipe
Elevation
10'
6"

Figure
2.
Schematic
detail
for
manifold
system
for
SF6
injection.
513
Appendix
B
to
Subpart
DDDD
of
Part
63
 
Methodology
and
Criteria
for
Demonstrating
That
an
Affected
Source
is
Part
of
the
Low­
risk
Subcategory
of
Plywood
and
Composite
Wood
Products
Manufacturing
Facilities
1.
Purpose
This
appendix
provides
the
methodology
and
criteria
for
demonstrating
that
your
affected
source
is
part
of
the
lowrisk
subcategory
of
plywood
and
composite
wood
products
(
PCWP)
manufacturing
facilities.
You
must
demonstrate
that
your
affected
source
is
part
of
the
low­
risk
subcategory
using
either
a
look­
up
table
analysis
(
based
on
the
look­
up
tables
included
in
this
appendix)
or
using
a
site­
specific
risk
assessment
performed
according
to
the
criteria
specified
in
this
appendix.
This
appendix
also
specifies
how
and
when
you
must
obtain
approval
of
the
low­
risk
demonstrations
for
your
affected
source
and
how
to
ensure
that
your
affected
source
remains
in
the
low­
risk
subcategory
of
PCWP
facilities.

2.
Who
is
eligible
to
demonstrate
that
they
are
part
of
the
low­
risk
subcategory
of
PCWP
facilities?
Each
new,
reconstructed,
or
existing
affected
source
at
a
PCWP
manufacturing
facility
may
demonstrate
that
they
are
part
of
the
low­
risk
subcategory
of
PCWP
facilities.
Section
63.2232
of
40
CFR
part
63,
subpart
DDDD,
defines
the
affected
source
and
explains
which
affected
sources
are
new,
existing,
or
reconstructed.

3.
What
parts
of
my
facility
have
to
be
included
in
the
low­
risk
demonstration?
Every
process
unit
that
is
part
of
the
PCWP
affected
source
(
as
defined
in
§
63.2292
of
40
CFR
part
63,
subpart
DDDD)
and
that
emits
one
or
more
hazardous
air
pollutant
(
HAP)
listed
in
Table
1
to
this
appendix
must
be
included
in
the
low­
risk
demonstration.
You
are
not
required
to
include
process
units
outside
of
the
affected
source
in
the
low­
risk
demonstration.

4.
What
are
the
criteria
for
determining
if
my
facility
is
low
risk?
(
a)
Determine
the
individual
HAP
emission
rates
from
each
process
unit
within
the
affected
source
using
the
procedures
specified
in
section
5
of
this
appendix.
(
b)
Perform
chronic
and
acute
risk
assessments
using
the
dose­
response
values,
as
specified
in
paragraphs
(
b)(
1)
andthrough
(
23)
of
this
section.
514
(
1)
For
a
look­
up
table
analysis
or
site­
specific
chronic
inhalation
risk
assessment,
you
should
use
the
cancer
and
noncancer
dose­
response
values
listed
on
the
Environmental
Protection
Agency
(
EPA)
Air
Toxics
website
(
http://
www.
epa.
gov/
ttn/
atw/
toxsource/
summary.
html)
to
estimate
carcinogenic
and
noncarcinogenic
chronic
inhalation
risk,
respectively.
(
2)
For
site­
specific
acute
inhalation
risk
assessment,
you
must
use
the
acute
exposure
guidance
level
(
AEGL­
1)
value
for
acrolein
and
the
California
EPA
(
CalEPA)
acute
reference
exposure
level
(
REL)
value
for
formaldehyde
for
estimating
acute
inhalation
risk
found
at
http://
www.
epa.
gov/
ttn/
atw/
toxsource/
summary.
html.
(
3)
You
may
use
dose­
response
values
more
healthprotective
than
those
posted
on
the
EPA
Air
Toxics
website
(
http://
www.
epa.
gov/
ttn/
atw/
toxsource/
summary.
html)
to
facilitate
ongoing
certification
(
as
required
in
section
13
of
this
appendix)
that
your
affected
source
remains
in
the
low­
risk
subcategory.
(
c)
Demonstrate
that
your
affected
source
is
part
of
the
low­
risk
subcategory
by
estimating
the
maximum
impacts
of
your
affected
source
using
the
methods
described
in
either
section
6
of
this
appendix
(
look­
up
table
analysis)
or
section
7
of
this
appendix
(
site­
specific
risk
assessment)
and
comparing
the
results
to
the
low­
risk
criteria
presented
in
the
applicable
section.

5.
How
do
I
determine
HAP
emissions
from
my
affected
source?
(
a)
You
must
conduct
HAP
emissions
tests
according
to
the
requirements
in
paragraphs
(
b)
through
(
h)
of
this
section
and
the
methods
specified
in
Table
2
to
this
appendix
for
every
process
unit
within
the
affected
source
that
emits
one
or
more
of
the
HAP
listed
in
Table
1
to
this
appendix.
You
must
test
the
process
units
at
your
affected
source
to
obtain
the
emission
rates
in
pounds
per
hour
(
lb/
hr)
for
each
of
the
pollutants
listed
in
Table
1
to
this
appendix.
(
b)
Periods
when
emissions
tests
must
be
conducted.
(
1)
You
must
not
conduct
emissions
tests
during
periods
of
startup,
shutdown,
or
malfunction,
as
specified
in
40
CFR
63.7(
e)(
1).
(
2)
You
must
test
under
worst­
case
operating
conditions
as
defined
in
this
appendix.
You
must
describe
your
worst­
case
operating
conditions
in
your
performance
test
report
for
the
process
and
control
systems
(
if
applicable)
and
explain
why
the
conditions
are
worst­
case.
(
c)
Number
of
test
runs.
You
must
conduct
three
separate
test
runs
for
each
test
required
in
this
section,
515
as
specified
in
40
CFR
63.7(
e)(
3).
Each
test
run
must
last
at
least
1
hour
except
for:
testing
of
a
temporary
total
enclosure
(
TTE)
conducted
using
Methods
204A
through
204F
in
40
CFR
part
51,
appendix
M,
which
require
three
separate
test
runs
of
at
least
3
hours
each;
and
testing
of
an
enclosure
conducted
using
the
alternative
tracer
gas
method
in
appendix
A
to
40
CFR
part
63,
subpart
DDDD,
which
requires
a
minimum
of
three
separate
runs
of
at
least
20
minutes
each.
(
d)
Sampling
locations.
Sampling
sites
must
be
located
at
the
emission
point
and
prior
to
any
releases
to
the
atmosphere.
For
example,
at
the
outlet
of
the
control
device,
including
wet
control
devices,
and
prior
to
any
releases
to
the
atmosphere.
(
e)
Collection
of
monitoring
data
for
HAP
control
devices.
During
the
emissions
test,
you
must
collect
operating
parameter
monitoring
system
or
continuous
emissions
monitoring
system
(
CEMS)
data
at
least
every
15
minutes
during
the
entire
emissions
test
and
establish
the
site­
specific
operating
requirements
(
including
the
parameter
limits
or
total
hydrocarbon
(
THC)
concentration
limit)
in
Table
2
to
40
CFR
part
63,
subpart
DDDD,
using
data
from
the
monitoring
system
and
the
procedures
specified
in
paragraphs
(
k)
through
(
o)
of
§
63.2262
of
subpart
DDDD
of
40
CFR
part
63.
(
f)
Nondetect
data.
You
may
treat
emissions
of
an
individual
HAP
as
zero
if
all
of
the
test
runs
result
in
a
nondetect
measurement
and
the
conditions
in
paragraphs
(
1)
and
(
2)
of
this
section
are
met
for
the
relevant
test
method.
Otherwise,
nondetect
data
(
as
defined
in
§
63.2292
of
40
CFR
part
63,
subpart
DDDD)
for
individual
HAP
must
be
treated
as
one­
half
of
the
method
detection
limit.
(
1)
The
method
detection
limit
is
less
than
or
equal
to
1
part
per
million
by
volume,
dry
(
ppmvd)
for
pollutant
emissions
measured
using
Method
320
in
appendix
A
to
40
CFR
part
63;
or
the
NCASI
Method
IM/
CAN/
WP­
99.02
(
incorporated
by
reference
(
IBR),
see
40
CFR
63.14(
f));
or
ASTM
D6348­
03
(
IBR,
see
40
CFR
63.14(
b)).
(
2)
For
pollutants
measured
using
Method
29
in
appendix
A
to
40
CFR
part
60,
you
analyze
samples
using
atomic
absorption
spectroscopy
(
AAS).
(
g)
For
purposes
of
your
low­
risk
demonstration,
you
must
assume
that
17
percent
of
your
total
chromium
measured
using
EPA
Method
29
in
appendix
A
to
40
CFR
part
60
is
chromium
VI.
You
must
assume
that
65
percent
of
your
total
nickel
measured
using
EPA
Method
29
in
appendix
A
to
40
CFR
part
60
is
nickel
subsulfide.
(
h)
You
may
use
emission
rates
more
health­
protective
than
your
measured
emission
rates
(
e.
g.,
emissions
rates
10
516
times
your
measured
emission
rate)
to
facilitate
ongoing
certification
(
as
required
in
section
13
of
this
appendix)
that
your
affected
source
remains
in
the
low­
risk
subcategory.

6.
How
do
I
conduct
a
look­
up
table
analysis?
Use
the
look­
up
tables
(
Tables
3
and
4
to
this
appendix)
to
demonstrate
that
your
affected
source
is
part
of
the
low­
risk
subcategory,
following
the
procedures
in
paragraphs
(
a)
through
(
d)
of
this
section.
(
a)
Using
the
emission
rate
of
each
HAP
required
to
be
included
in
your
low­
risk
demonstration
(
measured
according
to
section
5
of
this
appendix),
calculate
your
total
toxicity­
weighted
carcinogen
and
noncarcinogen
emission
rates
for
each
of
your
process
units
using
Equations
1
and
2
of
this
appendix,
respectively.

TWCER
=

(
ERi
x
UREi)
Eqn.
1
TWCER
=
Toxicity­
weighted
carcinogenic
emission
rate
for
each
process
unit
(
lb/
hr)/(
µ
g/
m3)
ERi
=
Emission
rate
of
pollutant
i
(
lb/
hr)
UREi
=
Unit
risk
estimate
for
pollutant
i,
1
per
microgram
per
cubic
meter
(
µ
g/
m3)­
1
TWNER
=

(
ERi
/
RfCi/
RfCi)
Eqn.
2
TWNER
=
Toxicity­
weighted
noncarcinogenic
emission
rate
for
each
process
unit
(
lb/
hr)
ERi
=
Emission
rate
of
pollutant
i
(
lb/
hr)
RfCi
=
Reference
concentration
for
pollutant
i,
micrograms
per
cubic
meter
(
µ
g/
m3)

(
b)
Cancer
risk.
Calculate
the
total
toxicityweighted
carcinogen
emission
rate
for
your
affected
source
by
summing
the
toxicity­
weighted
carcinogen
emission
rates
for
each
of
your
process
units.
Identify
the
appropriate
maximum
allowable
toxicity­
weighted
carcinogen
emission
rate
from
Table
3
to
this
appendix
for
your
facilityaffected
source
using
the
average
stack
height
of
your
emission
points
and
the
minimum
distance
between
any
emission
point
at
the
facility
and
the
closest
property
boundaryaffected
source
and
a
place
where
people
live
(
or,
optionally,
at
a
place
where
people
could
live,
if
you
wish
to
ensure
your
low­
risk
status
against
future
population
shifts).
If
one
or
both
of
these
values
do
not
match
the
exact
values
in
the
lookup
table,
then
use
the
next
lowest
table
value.
(
Note:
If
your
average
stack
height
is
less
than
5
meters
(
m),
your
517
must
use
the
5
m
row.)
The
EPA
may
approve
your
facilityaffected
source
as
low
risk
for
carcinogenic
effects
if
your
toxicity­
weighted
carcinogen
emission
rate,
determined
using
the
methods
specified
in
this
appendix,
does
not
exceed
the
values
specified
in
Table
3
to
this
appendix.
(
c)
Noncancer
risk.
Calculate
the
total
central
nervous
system
(
CNS)
and
respiratory
target
organ
specific
toxicity­
weighted
noncarcinogen
emission
rate
for
your
affected
source
by
summing
the
toxicity­
weighted
emission
rates
for
each
of
your
process
units.
Identify
the
appropriate
maximum
allowable
toxicity­
weighted
noncarcinogen
emission
rate
from
Table
4
to
this
appendix
for
your
facilityaffected
source
using
the
average
stack
height
of
your
emission
points
and
the
minimum
distance
between
any
emission
point
at
the
facility
and
the
closest
property
boundaryaffected
source
and
a
place
where
people
live
(
or,
optionally,
at
a
place
where
people
could
live,
if
you
wish
to
ensure
your
low­
risk
status
against
future
population
shifts).
If
one
or
both
of
these
values
do
not
match
the
exact
values
in
the
lookup
table,
then
use
the
next
lowest
table
value.
(
Note:
If
your
average
stack
height
is
less
than
5
m,
your
must
use
the
5
m
row.)
The
EPA
may
approve
your
facilityaffected
source
as
low
risk
for
noncarcinogenic
effects
if
your
toxicity­
weighted
noncarcinogen
emission
rate,
determined
using
the
methods
specified
in
this
appendix,
does
not
exceed
the
values
specified
in
Table
4
to
this
appendix.
(
d)
Low­
risk
demonstration.
The
EPA
maywould
approve
your
facilityaffected
source
as
eligible
for
membership
in
the
low­
risk
subcategory
of
PCWP
facilitiesaffected
sources
if
it
determines
that:
1)
your
affected
source
is
low
risk
for
both
carcinogenic
and
noncarcinogenic
effects
using
the
look­
up
table
analysis
described
in
this
section,
and;
2)
you
meet
the
criteria
specified
in
Ssection
11
of
this
appendix;
and
3)
other
reasonably
considered
risk­
based
factors
indicate
that
it
is
appropriate
to
approve
your
lowrisk
demonstration.

7.
How
do
I
conduct
a
site­
specific
risk
assessment?
(
a)
Perform
a
site­
specific
risk
assessment
following
the
procedures
specified
in
this
section.
You
may
use
any
scientifically­
accepted
peer­
reviewed
assessment
methodology
for
your
site­
specific
risk
assessment.
An
example
of
one
approach
to
performing
a
site­
specific
risk
assessment
for
air
toxics
that
may
be
appropriate
for
your
facility
can
be
found
in
the
"
Air
Toxics
Risk
Assessment
Guidance
Reference
Library,
Volume
2,
Site­
Specific
Risk
Assessment
Technical
Resource
Document."
You
may
obtain
a
copy
of
the
"
Air
518
Toxics
Risk
Assessment
Reference
Library"
through
EPA's
air
toxics
website
at
www.
epa.
gov/
ttn/
atw.
(
b)
At
a
minimum,
your
site­
specific
risk
assessment
must:
(
1)
Estimate
the
long­
term
inhalation
exposures
through
the
estimation
of
annual
or
multi­
year
average
ambient
concentrations
for
the
chronic
portion
of
the
assessment.
(
2)
Estimate
the
acute
exposures
for
formaldehyde
and
acrolein
through
the
estimation
of
maximum
1­
hour
average
ambient
concentrations
for
the
acute
portion
of
the
assessment.
(
3)
Estimate
the
inhalation
exposure
of
the
individual
most
exposed
to
the
facility's
emissions.
(
4)
Estimate
the
individual
risks
over
a
70­
year
lifetime
for
the
chronic
cancer
risk
assessment.
(
5)
Use
site­
specific,
quality­
assured
data
wherever
possible.
(
6)
Use
health­
protective
default
assumptions
wherever
site­
specific
data
are
not
available.
(
7)
Contain
adequate
documentation
of
the
data
and
methods
used
for
the
assessment
so
that
it
is
transparent
and
can
be
reproduced
by
an
experienced
risk
assessor
and
emission
measurement
expert.
(
c)
Your
site­
specific
risk
assessment
need
not:
(
1)
Assume
any
attenuation
of
exposure
concentrations
due
to
the
penetration
of
outdoor
pollutants
into
indoor
exposure
areas.
(
2)
Assume
any
reaction
or
deposition
of
the
emitted
pollutants
during
transport
from
the
emission
point
to
the
point
of
exposure.
(
d)
The
EPA
may
approve
your
facility
as
low
risk
for
carcinogenic
chronic
inhalation
effects
if
your
sitespecific
risk
assessment
demonstrates
that
maximum
off­
site
individual
lifetime
cancer
risk
at
a
location
where
people
live
is
less
than
1
in
1
million.
(
e)
The
EPA
may
approve
your
facility
as
low
risk
for
noncarcinogenic
chronic
inhalation
effects
if
your
sitespecific
risk
assessment
demonstrates
that
every
maximum
off­
site
target­
organ
specific
hazard
index
(
TOSHI),
or
appropriate
set
of
site­
specific
hazard
indices
based
on
mechanism
of
action
or
dose­
response
data
for
mixtures,
at
a
location
where
people
live
is
less
than
or
equal
to
1.0.
(
f)
The
EPA
may
approve
your
facility
as
low
risk
for
noncarcinogenic
acute
inhalation
effects
if
your
sitespecific
risk
assessment
demonstrates
that
the
maximum
offsite
acute
hazard
quotients
for
both
acrolein
and
formaldehyde
are
less
than
or
equal
to
1.0.
(
g)
The
EPA
maywould
approve
your
facilityaffected
519
source
as
eligible
for
membership
in
the
low­
risk
subcategory
of
PCWP
facilitiesaffected
sources
if
it
determines
that:
1)
your
affected
source
is
low
risk
for
all
of
the
applicable
effects
listed
in
paragraphs
(
d)
through
(
f)
of
this
section,
and;
2)
you
meet
the
criteria
specified
in
section
11
of
this
appendix;
and
3)
other
reasonably
considered
risk­
based
factors
indicate
that
it
is
appropriate
to
approve
your
low­
risk
demonstration.

8.
What
information
must
I
submit
for
the
low­
risk
demonstration?
(
a)
Your
low­
risk
demonstration
must
include
at
a
minimum
the
information
specified
in
paragraphs
(
a)(
1)
through
(
5)
of
this
section
and
the
information
specified
in
either
paragraph
(
b)
or
(
c)
of
this
section.
(
1)
Identification
of
each
process
unit
at
the
affected
source.
(
2)
Stack
parameters
for
each
emission
point
including,
but
not
limited
to,
the
parameters
listed
in
paragraphs
(
a)(
2)(
i)
through
(
iv)
below:
(
i)
Emission
release
type.
(
ii)
Stack
height,
stack
area,
stack
gas
temperature,
and
stack
gas
exit
velocity.
(
iii)
Plot
plan
showing
all
emission
points,
nearby
residences,
and
fenceline.
(
iv)
Identification
of
any
HAP
control
devices
used
to
reduce
emissions
from
each
process
unit.
(
3)
Emission
test
reports
for
each
pollutant
and
process
unit
based
on
the
test
methods
specified
in
Table
2
to
this
appendix,
including
a
description
of
the
process
parameters
identified
as
being
worst
case.
(
4)
Identification
of
the
dose­
response
values
used
in
your
risk
analysis
(
look­
up
table
analysis
or
site­
specific
risk
assessment),
according
to
section
4(
b)
of
this
appendix.
(
5)
Identification
of
the
controlling
process
factors
(
including,
but
not
limited
to,
production
rate,
annual
emission
rate,
type
of
control
devices,
process
parameters
documented
as
worst­
case
conditions
during
the
emissions
testing
used
for
your
low­
risk
demonstration)
that
will
become
Federally
enforceable
permit
conditions
used
to
show
that
your
facility
remains
in
the
low­
risk
subcategory.
(
b)
If
you
use
the
look­
up
table
analysis
in
section
6
of
this
appendix
to
demonstrate
that
your
facility
is
low
risk,
your
low­
risk
demonstration
must
contain
at
a
minimum
the
information
in
paragraphs
(
a)
and
(
b)(
1)
through
(
4)
of
this
section.
(
1)
Identification
of
the
stack
heights
for
each
520
emission
point
included
in
the
calculation
of
average
stack
height.
(
2)
Identification
of
the
emission
point
with
the
minimum
distance
to
the
property
boundary.
(
3)
Calculations
used
to
determine
the
toxicityweighted
carcinogen
and
noncarcinogen
emission
rates
according
to
section
6(
a)
of
this
appendix.
(
4)
Comparison
of
the
values
in
the
look­
up
tables
(
Tables
3
and
4
to
this
appendix)
to
your
toxicity­
weighted
emission
rates
for
carcinogenic
and
noncarcinogenic
HAP.
(
c)
If
you
use
a
site­
specific
risk
assessment
as
described
in
section
7
of
this
appendix
to
demonstrate
that
your
facility
is
low
risk
(
for
carcinogenic
and
noncarcinogenic
chronic
inhalation
and
acute
inhalation
risks),
your
low­
risk
demonstration
must
contain
at
a
minimum
the
information
in
paragraphs
(
a)
and
(
c)(
1)
through
(
8)
of
this
section.
(
1)
Identification
of
the
risk
assessment
methodology
used.
(
2)
Documentation
of
the
fate
and
transport
model
used.
(
3)
Documentation
of
the
fate
and
transport
model
inputs,
including
the
information
described
in
paragraphs
(
a)(
1)
through
(
4)
of
this
section
converted
to
the
dimensions
required
for
the
model
and
all
of
the
following
that
apply:
meteorological
data;
building,
land
use,
and
terrain
data;
receptor
locations
and
population
data;
and
other
facility­
specific
parameters
input
into
the
model.
(
4)
Documentation
of
the
fate
and
transport
model
outputs.
(
5)
Documentation
of
exposure
assessment
and
risk
characterization
calculations.
(
6)
Comparison
of
the
maximum
off­
site
individual
lifetime
cancer
risk
at
a
location
where
people
live
to
1
in
1
million,
as
required
in
section
7(
d)
of
this
appendix
for
carcinogenic
chronic
inhalation
risk.
(
7)
Comparison
of
the
maximum
off­
site
TOSHI
for
respiratory
effects
and
CNS
effects
at
a
location
where
people
live
to
the
limit
of
1.0,
as
required
in
section
7(
e)
of
this
appendix
for
noncarcinogenic
chronic
inhalation
risk.
(
8)
Comparison
of
the
maximum
off­
site
acute
inhalation
hazard
quotient
(
HQ)
for
both
acrolein
and
formaldehyde
to
the
limit
of
1.0,
as
required
in
section
7(
f)
of
this
appendix
for
noncancinogenic
acute
inhalation
effects.
(
d)
The
EPA
may
request
any
additional
information
it
determines
is
necessary
or
appropriate
to
evaluate
a
facility's
low­
risk
demonstration.
521
9.
Where
do
I
send
my
low­
risk
demonstration?
You
must
submit
your
low­
risk
demonstration
to
the
EPA
for
review
and
approval.
Send
your
low­
risk
demonstration
either
via
e­
mail
to
REAG@
epa.
gov
or
via
U.
S.
mail
or
other
mail
delivery
service
to
U.
S.
EPA,
Risk
and
Exposure
Assessment
Group,
Emission
Standards
Division
(
C404­
01),
Attn:
Group
Leader,
Research
Triangle
Park,
NC
27711,
and
send
a
copy
to
your
permitting
authority.
Your
affected
source
is
not
part
of
the
low­
risk
subcategory
of
PCWP
facilities
unless
and
until
EPA
notifies
you
that
it
has
determined
that
you
meet
the
requirements
of
section
11
of
this
appendix.

10.
When
do
I
submit
my
low­
risk
demonstration?
(
a)
If
you
have
an
existing
affected
source,
you
must
complete
and
submit
for
approval
your
low­
risk
demonstration
no
later
than
[
INSERT
DATE
14
MONTHS
AFTER
DATE
OF
PUBLICATION
OF
THE
FINAL
RULE
IN
THE
FEDERAL
REGISTER].
(
b)
If
you
have
an
affected
source
that
is
an
area
source
that
increases
its
emissions
or
its
potential
to
emit
such
that
it
becomes
a
major
source
of
HAP
before
[
INSERT
DATE
60
DAYS
AFTER
PUBLICATION
OF
THE
FINAL
RULE
IN
THE
FEDERAL
REGISTER],
then
you
must
complete
and
submit
for
approval
your
low­
risk
demonstration
no
later
than
[
INSERT
DATE
14
MONTHS
AFTER
DATE
OF
PUBLICATION
OF
THE
FINAL
RULE
IN
THE
FEDERAL
REGISTER].
If
you
have
an
affected
source
that
is
an
area
source
that
increases
its
emissions
or
its
potential
to
emit
such
that
it
becomes
a
major
source
of
HAP
after
[
INSERT
DATE
60
DAYS
AFTER
PUBLICATION
OF
THE
FINAL
RULE
IN
THE
FEDERAL
REGISTER],
then
you
must
complete
and
submit
for
approval
your
low­
risk
demonstration
no
later
than
12
months
after
you
become
a
major
source
or
after
initial
startup
of
your
affected
source
as
a
major
source,
whichever
is
later.
(
c)
If
you
have
a
new
or
reconstructed
affected
source
you
must
conduct
the
emission
tests
specified
in
section
5
of
this
appendix
upon
initial
startup
and
use
the
results
of
these
emissions
tests
to
complete
and
submit
your
low­
risk
demonstration
within
180
days
following
your
initial
startup
date.
If
your
new
or
reconstructed
affected
source
starts
up
before
[
INSERT
DATE
60
DAYS
AFTER
PUBLICATION
OF
THE
FINAL
RULE
IN
THE
FEDERAL
REGISTER],
for
EPA
to
find
that
you
are
included
in
the
low­
risk
subcategory,
your
low­
risk
demonstration
must
show
that
you
were
eligible
to
meet
the
criteria
in
section
11
of
this
appendix
no
later
than
[
INSERT
DATE
60
DAYS
AFTER
PUBLICATION
OF
THE
FINAL
RULE
IN
THE
FEDERAL
REGISTER].
If
your
new
or
reconstructed
source
starts
up
after
[
INSERT
DATE
60
DAYS
AFTER
PUBLICATION
OF
522
THE
FINAL
RULE
IN
THE
FEDERAL
REGISTER],
for
EPA
to
find
that
you
are
included
in
the
low­
risk
subcategory,
your
lowrisk
demonstration
must
show
that
you
were
eligible
to
meet
the
criteria
in
section
11
of
this
appendix
upon
initial
startup
of
your
affected
source.
Facilities
that
are
not
part
of
the
low­
risk
subcategory
by
[
INSERT
DATE
38
MONTHS
AFTER
PUBLICATION
OF
THE
FINAL
RULE
IN
THE
FEDERAL
REGISTER]
must
comply
with
the
requirements
of
40
CFR
part
63,
subpart
DDDD.
Facilities
may
not
request
compliance
extensions
from
the
permitting
authority
if
they
fail
to
demonstrate
they
are
part
of
the
low­
risk
subcategory
or
to
request
additional
time
to
install
controls
to
become
part
of
the
low­
risk
subcategory.

11.
How
does
my
affected
source
become
part
of
the
low­
risk
subcategory
of
PCWP
facilities?
To
be
included
in
the
low­
risk
subcategory,
EPA
must
find
that
you
meet
the
criteria
in
paragraphs
(
a)
and
(
b)
of
this
section.
Unless
and
until
EPA
finds
that
you
meet
these
criteria,
your
affected
source
is
subject
to
the
applicable
compliance
options,
operating
requirements,
and
work
practice
requirements
in
40
CFR
part
63,
subpart
DDDD.
(
a)
Your
demonstration
of
low
risk
must
be
approved
by
EPA.
(
b)
Following
EPA
approval,
the
parameters
that
defined
your
affected
source
as
part
of
the
low­
risk
subcategory
(
including,
but
not
limited
to,
production
rate,
annual
emission
rate,
type
of
control
devices,
process
parameters
reflecting
the
emissions
rates
used
for
your
low­
risk
demonstration)
must
be
incorporated
as
federally
enforceable
terms
and
conditions
into
your
title
V
permit.
You
must
submit
an
application
for
a
significant
permit
modification
to
reopen
your
title
V
permit
to
incorporate
such
terms
and
conditions
according
to
the
procedures
and
schedules
of
40
CFR
part
71
or
the
EPA­
approved
program
in
effect
under
40
CFR
part
70,
as
applicable.

12.
What
must
I
do
to
ensure
my
affected
source
remains
in
the
low­
risk
subcategory
of
PCWP
facilities?
You
must
meet
the
requirements
in
Table
2
to
40
CFR
part
63,
subpart
DDDD,
for
each
HAP
control
device
used
at
the
time
when
you
completed
your
low­
risk
demonstration.
You
must
monitor
and
collect
data
according
to
§
63.2270
of
subpart
DDDD
to
show
continuous
compliance
with
your
control
device
operating
requirements.
You
must
demonstrate
continuous
compliance
with
the
control
device
operating
requirements
that
apply
to
you
by
collecting
and
recording
the
monitoring
system
data
listed
in
Table
2
to
40
CFR
part
523
63,
subpart
DDDD
for
the
process
unit
according
to
§
§
63.2269(
a),
(
b),
and
(
d)
of
subpart
DDDD;
and
reducing
the
monitoring
system
data
to
the
specified
averages
in
units
of
the
applicable
requirement
according
to
calculations
in
§
63.2270
of
subpart
DDDD;
and
maintaining
the
average
operating
parameter
at
or
above
the
minimum,
at
or
below
the
maximum,
or
within
the
range
(
whichever
applies)
established
according
to
section
5(
e)
of
this
appendix.

13.
What
happens
if
the
criteria
used
in
the
risk
determination
change?
(
a)
You
must
certify
with
each
annual
title
V
permit
compliance
certification
that
the
basis
for
your
affected
source's
low­
risk
determination
has
not
changed.
You
must
submit
this
certification
to
the
permitting
authority.
You
must
consider
the
changes
in
paragraphs
(
a)(
1)
through
(
4)
of
this
section.
(
1)
Process
changes
that
increase
HAP
emissions,
including,
but
not
limited
to,
a
production
rate
increase,
an
annual
emission
rate
increase,
a
change
in
type
of
control
device,
changes
in
process
parameters
reflecting
emissions
rates
used
for
your
approved
low­
risk
demonstration.
(
2)
Population
shifts,
such
as
if
people
move
to
a
different
location
such
that
their
risks
from
the
facility
increase.
(
3)
Unit
risk
estimate
increases
posted
on
the
EPA
website
(
http://
www.
epa.
gov/
ttn/
atw/
toxsource/
summary.
html)
for
the
pollutants
included
in
Table
1
to
this
appendix.
(
4)
Reference
concentration
decreases
posted
on
the
EPA
website
(
http://
www.
epa.
gov/
ttn/
atw/
toxsource/
summary.
html)
for
the
pollutants
included
in
Table
1
to
this
appendix.
(
5)
Acute
dose­
response
value
for
formaldehyde
or
acrolein
becomes
more
health­
protective.
(
b)
If
your
facility
commences
operating
outside
of
the
low­
risk
subcategory,
it
is
no
longer
part
of
the
lowrisk
subcategory.
You
must
be
in
compliance
with
40
CFR
part
63,
subpart
DDDD
as
specified
in
paragraphs
(
b)(
1)
through
(
3)
of
this
section.
Operating
outside
of
the
lowrisk
subcategory
means
that
one
of
the
changes
listed
in
paragraphs
(
a)(
1)
through
(
4)
of
this
section
has
occurred
and
that
the
change
is
inconsistent
with
your
facility's
title
V
permit
terms
and
conditions
reflecting
EPA's
approval
of
the
parameters
used
in
your
low
risk
demonstration.
(
1)
You
must
notify
the
permitting
authority
as
soon
as
you
know,
or
could
have
reasonably
known,
that
your
524
facility
is
or
will
be
operating
outside
of
the
low­
risk
subcategory.
(
2)
You
must
be
in
compliance
with
the
requirements
of
40
CFR
part
63,
subpart
DDDD
as
specified
in
paragraph
(
b)(
2)(
i)
or
(
ii)
of
this
section,
whichever
applies.
(
i)
If
you
are
operating
outside
of
the
low­
risk
subcategory
due
to
a
change
described
in
paragraph
(
a)(
1)
of
this
section,
then
you
must
comply
with
40
CFR
part
63,
subpart
DDDD
beginning
on
the
date
when
your
facility
commences
operating
outside
the
low­
risk
subcategory.
(
ii)
If
you
are
operating
outside
of
the
low­
risk
subcategory
due
to
a
change
described
in
paragraphs
(
a)(
2)
through
(
3)
of
this
section,
then
you
must
comply
with
40
CFR
part
63,
subpart
DDDD
no
later
than
three
years
from
the
date
your
facility
commences
operating
outside
the
low­
risk
subcategory.
(
3)(
i)
You
must
conduct
performance
tests
no
later
than
180
calendar
days
after
the
applicable
date
specified
in
paragraph
(
b)(
2)
of
this
section.
(
ii)
You
must
conduct
initial
compliance
demonstrations
that
do
not
require
performance
tests
30
calendar
days
after
the
applicable
date
specified
in
paragraph
(
b)(
2)
of
this
section.
(
iii)
For
the
purposes
of
facilities
affected
by
this
section,
you
must
refer
to
the
requirements
in
paragraph
(
b)
of
this
section
instead
of
the
requirements
of
§
63.2233
when
complying
with
40
CFR
part
63,
subpart
DDDD.

14.
What
records
must
I
keep?
(
a)
You
must
keep
records
of
the
information
used
in
developing
the
low­
risk
demonstration
for
your
affected
source,
including
all
of
the
information
specified
in
section
8
of
this
appendix.
(
b)
You
must
keep
the
records
required
in
section
12(
a)
of
this
appendix
to
show
continuous
compliance
with
the
operating
requirements
for
control
devices.
(
c)
For
each
THC
CEMS,
you
must
keep
the
records
specified
in
§
63.2282(
c)
of
40
CFR
part
63,
subpart
DDDD.

15.
Definitions.
The
definitions
in
§
63.2292
of
40
CFR
part
63,
subpart
DDDD,
apply
to
this
appendix.
Additional
definitions
applicable
for
this
appendix
are
as
follows:

Direct­
fired
process
unit
means
a
process
unit
that
is
heated
by
the
passing
of
combustion
exhaust
directly
through
the
process
unit
such
that
the
process
material
is
contacted
by
the
combustion
exhaust.
525
Emission
point
means
an
individual
stack
or
vent
from
a
process
unit
that
emits
HAP
required
for
inclusion
in
the
low­
risk
demonstration
specified
in
this
appendix.
Process
units
may
have
multiple
emission
points.

Hazard
Index
(
HI)
means
the
sum
of
more
than
one
hazard
quotient
for
multiple
substances
and/
or
multiple
exposure
pathways.

Hazard
Quotient
(
HQ)
means
the
ratio
of
the
predicted
media
concentration
of
a
pollutant
to
the
media
concentration
at
which
no
adverse
effects
are
expected.
For
inhalation
exposures,
the
HQ
is
calculated
as
the
air
concentration
divided
by
the
reference
concentration
(
RfC).

Look­
up
table
analysis
means
a
risk
screening
analysis
based
on
comparing
the
toxicity­
weighted
HAP
emission
rate
from
the
affected
source
to
the
maximum
allowable
toxicityweighted
HAP
emission
rates
specified
in
Tables
3
and
4
to
this
appendix.

Reference
Concentration
(
RfC)
means
an
estimate
(
with
uncertainty
spanning
perhaps
an
order
of
magnitude)
of
a
continuous
inhalation
exposure
to
the
human
population
(
including
sensitive
subgroups)
that
is
likely
to
be
without
an
appreciable
risk
of
deleterious
effects
during
a
lifetime.
It
can
be
derived
from
various
types
of
human
or
animal
data,
with
uncertainty
factors
generally
applied
to
reflect
limitations
of
the
data
used.

Target
organ
specific
hazard
index
(
TOSHI)
means
the
sum
of
hazard
quotients
for
individual
chemicals
that
affect
the
same
organ
or
organ
system
(
e.
g.,
respiratory
system,
central
nervous
system).

Unit
Risk
Estimate
(
URE)
means
the
upper­
bound
excess
lifetime
cancer
risk
estimated
to
result
from
continuous
exposure
to
an
agent
at
a
concentration
of
1
microgram
per
cubic
meter
(
µ
g/
m3)
in
air.

Worst­
case
operating
conditions
means
operation
of
a
process
unit
during
emissions
testing
under
the
conditions
that
result
in
the
highest
HAP
emissions
or
that
result
in
the
emissions
stream
composition
(
including
HAP
and
non­
HAP)
that
is
most
challenging
for
the
control
device
if
a
control
device
is
used.
For
example,
worst
case
conditions
could
include
operation
of
the
process
unit
at
maximum
throughput,
at
its
highest
temperature,
with
the
wood
species
mix
likely
to
produce
the
most
HAP,
and/
or
with
the
resin
formulation
526
containing
the
greatest
HAP.
527
Table
1
to
Appendix
B
to
Subpart
DDDD
of
40
CFR
Part
63.
HAP
That
Must
be
Included
in
the
Demonstration
of
Eligibility
for
the
Low­
risk
PCWP
Subcategory.

For
your
analysis
of
the
following
effects...
You
must
include
the
following
HAP...

(
1)
Chronic
inhalation
carcinogenic
effects
acetaldehyde,
benzene,
arsenic,
beryllium,
cadmium,
chromium,
lead,
nickel,
and
formaldehyde.

(
2)
Chronic
inhalation
noncarcinogenic
respiratory
effects
acetaldehyde,
acrolein,
cadmium,
formaldehyde,
and
methylene
diphenyl
diisocyanate
(
MDI).

(
3)
Chronic
inhalation
noncarcinogenic
CNS
effects
manganese,
lead,
and
phenol.

(
4)
Acute
inhalation
acrolein
and
formaldehyde.
528
Table
2
to
Appendix
B
to
Subpart
DDDD
of
40
CFR
part
63.
Emission
Test
Methods.

For...
You
must...
Using...

(
1)
each
process
unit
select
sampling
ports'
location
and
the
number
of
traverse
points
Method
1
or
1A
of
40
CFR
part
60,
appendix
A
(
as
appropriate).

(
2)
each
process
unit
determine
velocity
and
volumetric
flow
rate;
Method
2
in
addition
to
Method
2A,
2C,
2D,
2F,
or
2G
in
appendix
A
to
40
CFR
part
60
(
as
appropriate).

(
3)
each
process
unit
conduct
gas
molecular
weight
analysis
Method
3,
3A,
or
3B
in
appendix
A
to
40
CFR
part
60
(
as
appropriate).

(
4)
each
process
unit
measure
moisture
content
of
the
stack
gas
Method
4
in
appendix
A
to
40
CFR
part
60.

(
5)
each
process
unit
measure
emissions
of
the
following
HAP:
acetaldehyde,
acrolein,
formaldehyde,
and
phenol
NCASI
Method
IM/
CAN/
WP­
99.02
(
IBR,
see
40
CFR
63.14(
f));
OR
Method
320
in
appendix
A
to
40
CFR
part
63;
OR
ASTM
D6348­
03
(
IBR,
see
40
CFR
63.14(
b))
provided
that
percent
R
as
determined
in
Annex
A5
of
ASTM
D6348­
03
is
equal
or
greater
than
70
percent
and
less
than
or
equal
to
130
percent.

(
6)
each
process
unit
measure
emissions
of
benzene
Method
320
in
appendix
A
to
40
CFR
part
63;
OR
ASTM
D6348­
03
(
IBR,
see
40
CFR
63.14(
b))
provided
that
percent
R
as
determined
in
Annex
A5
of
ASTM
D6348­
03
is
equal
or
greater
than
70
percent
and
less
than
or
equal
to
130
percent.

(
7)
each
press
that
processes
board
containing
MDI
resin
measure
emissions
of
MDI
Method
320
in
appendix
A
to
40
CFR
part
63;
OR
Conditional
Test
Method
(
CTM)
031
which
is
posted
on
http://
www.
epa.
gov/
ttn/
e
mc/
ctm.
html
529
(
8)
each
direct­
fired
process
unit
measure
emissions
of
the
following
HAP
metals:
arsenic,
beryllium,
cadmium,
chromium,
lead,
manganese,
and
nickel.
Method
29
in
appendix
A
to
40
CFR
part
60.

(
9)
each
reconstituted
wood
product
press
or
reconstituted
wood
product
board
cooler
with
a
HAP
control
device
meet
the
design
specifications
included
in
the
definition
of
wood
products
enclosure
in
§
63.2292
of
subpart
DDDD
of
40
CFR
part
63
OR
determine
the
percent
capture
efficiency
of
the
enclosure
directing
emissions
to
an
add­
on
control
device
Methods
204
and
204A
through
204F
of
40
CFR
part
51,
appendix
M
to
determine
capture
efficiency
(
except
for
wood
products
enclosures
as
defined
in
§
63.2292).
Enclosures
that
meet
the
definition
of
wood
products
enclosure
or
that
meet
Method
204
requirements
for
a
PTE
are
assumed
to
have
a
capture
efficiency
of
100
percent.
Enclosures
that
do
not
meet
either
the
PTE
requirements
or
design
criteria
for
a
wood
products
enclosure
must
determine
the
capture
efficiency
by
constructing
a
TTE
according
to
the
requirements
of
Method
204
and
applying
Methods
204A
through
204F
(
as
appropriate).
As
an
alternative
to
Methods
204
and
204A
through
204F,
you
may
use
the
tracer
gas
method
contained
in
appendix
A
to
subpart
DDDD.

(
10)
each
reconstituted
wood
product
press
or
reconstituted
wood
product
board
cooler
determine
the
percent
capture
efficiency
a
TTE
and
Methods
204
and
204A
through
204F
(
as
appropriate)
of
40
CFR
part
51,
appendix
M.
As
an
alternative
to
installing
a
TTE
and
using
Methods
204
and
204A
through
204F,
you
may
use
the
tracer
gas
method
contained
in
appendix
A
to
subpart
DDDD.

(
11)
each
process
unit
with
a
HAP
control
device
establish
the
sitespecific
operating
requirements
(
including
the
parameter
limits
or
THC
concentration
limits)
in
Table
2
to
subpart
DDDD
data
from
the
parameter
monitoring
system
or
THC
CEMS
and
the
applicable
performance
test
method(
s).
530
531
Table
3
to
Appendix
B
to
Subpart
DDDD
of
40
CFR
part
63.
Maximum
Allowable
Toxicity­

Weighted
Carcinogen
Emission
Rate
(
lb/
hr)/(
µ
g/
m3)

FencelineDistance
to
Nearest
Residence
(
m)

Stack
height
(
m)
0
50
100
150
200
250
500
1000
1500
2000
3000
5000
5
8.72E­
07
8.72E­
07
8.72E­
07
9.63E­
07
1.25E­
06
1.51E­
06
2.66E­
06
4.25E­
06
4.39E­
06
4.39E­
06
4.39E­
06
5.00E­
06
10
2.47E­
06
2.47E­
06
2.47E­
06
2.47E­
06
2.47E­
06
2.61E­
06
3.58E­
06
5.03E­
06
5.89E­
06
5.89E­
06
5.89E­
06
6.16E­
06
20
5.81E­
06
5.81E­
06
5.81E­
06
5.81E­
06
5.81E­
06
5.81E­
06
5.90E­
06
7.39E­
06
8.90E­
06
9.97E­
06
9.97E­
06
1.12E­
05
30
7.74E­
06
7.74E­
06
7.74E­
06
7.74E­
06
7.74E­
06
7.74E­
06
8.28E­
06
9.49E­
06
1.17E­
05
1.35E­
05
1.55E­
05
1.61E­
05
40
9.20E­
06
9.20E­
06
9.20E­
06
9.20E­
06
9.20E­
06
9.20E­
06
9.24E­
06
1.17E­
05
1.34E­
05
1.51E­
05
1.98E­
05
2.22E­
05
50
1.02E­
05
1.02E­
05
1.02E­
05
1.02E­
05
1.02E­
05
1.02E­
05
1.02E­
05
1.36E­
05
1.53E­
05
1.66E­
05
2.37E­
05
2.95E­
05
60
1.13E­
05
1.13E­
05
1.13E­
05
1.13E­
05
1.13E­
05
1.13E­
05
1.13E­
05
1.53E­
05
1.76E­
05
1.85E­
05
2.51E­
05
3.45E­
05
70
1.23E­
05
1.23E­
05
1.23E­
05
1.23E­
05
1.23E­
05
1.23E­
05
1.23E­
05
1.72E­
05
2.04E­
05
2.06E­
05
2.66E­
05
4.07E­
05
80
1.34E­
05
1.34E­
05
1.34E­
05
1.34E­
05
1.34E­
05
1.34E­
05
1.34E­
05
1.92E­
05
2.15E­
05
2.31E­
05
2.82E­
05
4.34E­
05
100
1.52E­
05
1.52E­
05
1.52E­
05
1.52E­
05
1.52E­
05
1.52E­
05
1.52E­
05
1.97E­
05
2.40E­
05
2.79E­
05
3.17E­
05
4.49E­
05
200
1.76E­
05
1.76E­
05
1.76E­
05
1.76E­
05
1.76E­
05
1.76E­
05
1.76E­
05
2.06E­
05
2.94E­
05
3.24E­
05
4.03E­
05
5.04E­
05
MIR=
1E­
06
Emission
rates
in
table
expressed
as
equivalents
normalized
to
theoretical
HAP
with
URE
=
1(
µ
g/
m3)­
1
532
Table
4
to
Appendix
B
to
Subpart
DDDD
of
40
CFR
part
63.
Maximum
Allowable
Toxicity­

Weighted
Noncarcinogen
Emission
Rate
(
lb/
hr)

FencelineDistance
to
Nearest
Residence
(
m)

Stack
height
(
m)
0
50
100
150
200
250
500
1000
1500
2000
3000
5000
5
2.51E­
01
2.51E­
01
3.16E­
01
3.16E­
01
3.16E­
01
3.16E­
01
3.16E­
01
3.46E­
01
4.66E­
01
6.21E­
01
9.82E­
01
1.80E+
00
10
5.62E­
01
5.62E­
01
5.62E­
01
5.62E­
01
5.62E­
01
5.62E­
01
5.62E­
01
5.70E­
01
6.33E­
01
7.71E­
01
1.13E+
00
1.97E+
00
20
1.43E+
00
1.43E+
00
1.43E+
00
1.43E+
00
1.43E+
00
1.43E+
00
1.43E+
00
1.43E+
00
1.68E+
00
1.83E+
00
2.26E+
00
3.51E+
00
30
2.36E+
00
2.36E+
00
2.36E+
00
2.36E+
00
2.36E+
00
2.36E+
00
2.53E+
00
3.04E+
00
3.04E+
00
3.33E+
00
4.45E+
00
5.81E+
00
40
3.11E+
00
3.11E+
00
3.11E+
00
3.11E+
00
3.11E+
00
3.11E+
00
3.42E+
00
4.04E+
00
5.07E+
00
5.51E+
00
6.39E+
00
9.63E+
00
50
3.93E+
00
3.93E+
00
3.93E+
00
3.93E+
00
3.93E+
00
3.93E+
00
4.49E+
00
4.92E+
00
6.95E+
00
7.35E+
00
8.99E+
00
1.25E+
01
60
4.83E+
00
4.83E+
00
4.83E+
00
4.83E+
00
4.83E+
00
4.83E+
00
5.56E+
00
6.13E+
00
7.80E+
00
1.01E+
01
1.10E+
01
1.63E+
01
70
5.77E+
00
5.77E+
00
5.77E+
00
5.77E+
00
5.77E+
00
5.77E+
00
6.45E+
00
7.71E+
00
8.83E+
00
1.18E+
01
1.36E+
01
1.86E+
01
80
6.74E+
00
6.74E+
00
6.74E+
00
6.74E+
00
6.74E+
00
6.74E+
00
7.12E+
00
9.50E+
00
1.01E+
01
1.29E+
01
1.72E+
01
2.13E+
01
100
8.87E+
00
8.87E+
00
8.87E+
00
8.87E+
00
8.87E+
00
8.87E+
00
8.88E+
00
1.19E+
01
1.37E+
01
1.55E+
01
2.38E+
01
2.89E+
01
200
1.70E+
01
1.70E+
01
1.70E+
01
1.70E+
01
1.70E+
01
1.70E+
01
1.70E+
01
2.05E+
01
2.93E+
01
3.06E+
01
4.02E+
01
4.93E+
01
HI=
1.
However,
EPA
may
require
a
more
stringent
level
in
specific
cases,
which
will
correspondingly
render
the
emission
rates
in
the
table
more
stringent.

Emission
rates
in
table
expressed
in
lbs/
hr
as
equivalents
normalized
to
theoretical
HAP
with
RfC
=
1.0
µ
g/
m3
533
For
the
reasons
stated
in
the
preamble,
title
40,
chapter
I,

part
429
of
the
Code
of
Federal
Regulations
is
amended
as
follows:

PART
429­­[
AMENDED]

1.
The
authority
citation
for
part
429
continues
to
read
as
follows:

Authority:
Secs.
301,
304(
b),
(
c),
(
e),
and
(
g),
306(
b)
and
(
c),
307(
a),
(
b),
and
(
c)
and
501
of
the
Clean
Water
Act
(
the
Federal
Water
Pollution
Control
Act
Amendments
of
1972,

as
amended
by
the
Clean
Water
Act
of
1977)
(
the
"
Act");
33
U.
S.
C.
1911,
1314(
b),
(
c),
(
e),
and
(
g),
1316(
b)
and
(
c),

1917(
b)
and
(
c),
and
1961;
86
Stat.
815,
Pub.
L.
92­
500;
91
Stat.
1567,
Pub
L.
95­
217.

2.
Section
429.11
is
amended
by
revising
paragraph
(
c)
to
read
as
follows:

§
429.11
General
definitions.

*
*
*
*
*

(
c)
The
term
"
process
wastewater"
specifically
excludes
non­
contact
cooling
water,
material
storage
yard
runoff
(
either
raw
material
or
processed
wood
storage),

boiler
blowdown,
and
wastewater
from
washout
of
thermal
oxidizers
or
catalytic
oxidizers,
wastewater
from
biofilters,
or
wastewater
from
wet
electrostatic
precipitators
used
upstream
of
thermal
oxidizers
or
catalytic
oxidizers
installed
by
facilities
covered
by
534
Subparts
B,
C,
D
or
M
to
comply
with
the
national
emissions
standards
for
hazardous
air
pollutants
(
NESHAP)
for
plywood
and
composite
wood
products
(
PCWP)
facilities
(
40
CFR
part
63,
subpart
DDDD).
For
the
dry
process
hardboard,
veneer,

finishing,
particleboard,
and
sawmills
and
planing
mills
subcategories,
fire
control
water
is
excluded
from
the
definition.

*
*
*
*
*
