Document ID: EPA-HQ-OPPT-2004-0079-0001
Agency: epa
Document Type: Notice
Title: National Advisory Committee for Acute Exposure Guideline Levels (AEGLs) for Hazardous Substances; Proposed AEGL Values; Notice of Availability
Posted Date: 2004-09-07T04:00Z

Federal
Register:
September
7,
2004
(
Volume
69,
Number
172)]
[
Notices]
[
Page
54144­
54148]
From
the
Federal
Register
Online
via
GPO
Access
[
wais.
access.
gpo.
gov]
[
DOCID:
fr07se04­
52]

=======================================================================
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­

ENVIRONMENTAL
PROTECTION
AGENCY
[
OPPT­
2004­
0079;
FRL­
7350­
2]

National
Advisory
Committee
for
Acute
Exposure
Guideline
Levels
(
AEGLs)
for
Hazardous
Substances,
Proposed
AEGL
Values;
Notice
of
Availability
AGENCY:
Environmental
Protection
Agency
(
EPA).

ACTION:
Notice.

­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­

[[
Page
54145]]

SUMMARY:
The
National
Advisory
Committee
for
Acute
Exposure
Guideline
Levels
for
Hazardous
Substances
(
NAC/
AEGL
Committee)
is
developing
AEGLs
on
an
ongoing
basis
to
provide
Federal,
State,
and
local
agencies
with
information
on
short­
term
exposures
to
hazardous
chemicals.
This
notice
provides
a
list
of
15
Proposed
AEGL
chemicals
that
are
available
for
public
review
and
comment.
Comments
are
welcome
on
both
the
AEGL
values
and
the
Technical
Support
Documents
placed
in
the
public
version
of
the
official
docket.

DATES:
Comments,
identified
by
docket
ID
number
OPPT­
2004­
0079,
must
be
received
on
or
before
October
7,
2004.

ADDRESSES:
Comments
may
be
submitted
electronically,
by
mail,
or
through
hand
delivery/
courier.
Follow
the
detailed
instructions
as
provided
in
Unit
I.
of
the
SUPPLEMENTARY
INFORMATION.

FOR
FURTHER
INFORMATION
CONTACT:
For
general
information
contact:
Colby
Lintner,
Regulatory
Coordinator,
Environmental
Assistance
Division
(
7408M),
Office
of
Pollution
Prevention
and
Toxics,
Environmental
Protection
Agency,
1200
Pennsylvania
Ave.,
NW.,
Washington,
DC
20460­
0001;
telephone
number:
(
202)
554­
1404;
e­
mail
address:
TSCA­
Hotline@
epa.
gov.
For
technical
information
contact:
Paul
S.
Tobin,
Designated
Federal
Officer
(
DFO),
Office
of
Pollution
Prevention
and
Toxics
(
7406M),
Environmental
Protection
Agency,
1200
Pennsylvania
Ave.,
NW.,
Washington,
DC
20460­
0001;
telephone
number:
(
202)
564­
8557;
e­
mail
address:
tobin.
paul@
epa.
gov.

SUPPLEMENTARY
INFORMATION:

I.
General
Information
A.
Does
this
Action
Apply
to
Me?

This
action
is
directed
to
the
general
public
to
provide
an
opportunity
for
review
and
comment
on
``
Proposed''
AEGL
values
and
their
supporting
scientific
rationale.
This
action
may
be
of
particular
interest
to
anyone
who
may
be
affected
if
the
AEGL
values
are
adopted
by
government
agencies
for
emergency
planning,
prevention,
or
response
programs,
such
as
EPA's
Risk
Management
Program
under
the
Clean
Air
Act
and
Amendments
Section
112r.
It
is
possible
that
other
Federal
Agencies
besides
EPA,
as
well
as
State
and
local
agencies
and
private
organizations,
may
adopt
the
AEGL
values
for
their
programs.
As
such,
the
Agency
has
not
attempted
to
describe
all
the
specific
entities
that
may
be
affected
by
this
action.
If
you
have
any
questions
regarding
the
applicability
of
this
action
to
a
particular
entity,
consult
the
DFO
listed
under
FOR
FURTHER
INFORMATION
CONTACT.

B.
How
Can
I
Get
Copies
of
this
Document
and
Other
Related
Information?

1.
Docket.
EPA
has
established
an
official
public
docket
for
this
action
under
docket
identification
(
ID)
number
OPPT­
2004­
0079.
The
official
public
docket
consists
of
the
Technical
Support
Documents
specifically
referenced
in
this
action,
any
public
comments
received,
and
other
information
related
to
this
action.
Although
a
part
of
the
official
docket,
the
public
docket
does
not
include
Confidential
Business
Information
(
CBI)
or
other
information
whose
disclosure
is
restricted
by
statute.
The
official
public
docket
is
the
collection
of
materials
that
is
available
for
public
viewing
at
the
EPA
Docket
Center,
Rm.
B102­
Reading
Room,
EPA
West,
1301
Constitution
Ave.,
NW.,
Washington,
DC.
The
EPA
Docket
Center
is
open
from
8:
30
a.
m.
to
4:
30
p.
m.,
Monday
through
Friday,
excluding
legal
holidays.
The
EPA
Docket
Center
Reading
Room
telephone
number
is
(
202)
566­
1744
and
the
telephone
number
for
the
OPPT
Docket,
which
is
located
in
EPA
Docket
Center,
is
(
202)
566­
0280.
2.
Electronic
access.
You
may
access
this
Federal
Register
document
electronically
through
the
EPA
Internet
under
the
``
Federal
Register''
listings
at
http://
www.
epa.
gov/
fedrgstr/.

An
electronic
version
of
the
public
docket
is
available
through
EPA's
electronic
public
docket
and
comment
system,
EPA
Dockets.
You
may
use
EPA
Dockets
at
http://
www.
epa.
gov/
edocket/
to
submit
or
view
public
comments,
access
the
index
listing
of
the
contents
of
the
official
public
docket,
and
to
access
those
documents
in
the
public
docket
that
are
available
electronically.
Although
not
all
docket
materials
may
be
available
electronically,
you
may
still
access
any
of
the
publicly
available
docket
materials
through
the
docket
facility
identified
in
Unit
I.
B.
1.
Once
in
the
system,
select
``
search,''
then
key
in
the
appropriate
docket
ID
number.
Certain
types
of
information
will
not
be
placed
in
the
EPA
Dockets.
Information
claimed
as
CBI
and
other
information
whose
disclosure
is
restricted
by
statute,
which
is
not
included
in
the
official
public
docket,
will
not
be
available
for
public
viewing
in
EPA's
electronic
public
docket.
EPA's
policy
is
that
copyrighted
material
will
not
be
placed
in
EPA's
electronic
public
docket
but
will
be
available
only
in
printed,
paper
form
in
the
official
public
docket.
To
the
extent
feasible,
publicly
available
docket
materials
will
be
made
available
in
EPA's
electronic
public
docket.
When
a
document
is
selected
from
the
index
list
in
EPA
Dockets,
the
system
will
identify
whether
the
document
is
available
for
viewing
in
EPA's
electronic
public
docket.
Although
not
all
docket
materials
may
be
available
electronically,
you
may
still
access
any
of
the
publicly
available
docket
materials
through
the
docket
facility
identified
in
Unit
I.
B.
1.
EPA
intends
to
work
towards
providing
electronic
access
to
all
of
the
publicly
available
docket
materials
through
EPA's
electronic
public
docket.
For
public
commenters,
it
is
important
to
note
that
EPA's
policy
is
that
public
comments,
whether
submitted
electronically
or
in
paper,
will
be
made
available
for
public
viewing
in
EPA's
electronic
public
docket
as
EPA
receives
them
and
without
change,
unless
the
comment
contains
copyrighted
material,
CBI,
or
other
information
whose
disclosure
is
restricted
by
statute.
When
EPA
identifies
a
comment
containing
copyrighted
material,
EPA
will
provide
a
reference
to
that
material
in
the
version
of
the
comment
that
is
placed
in
EPA's
electronic
public
docket.
The
entire
printed
comment,
including
the
copyrighted
material,
will
be
available
in
the
public
docket.
Public
comments
submitted
on
computer
disks
that
are
mailed
or
delivered
to
the
docket
will
be
transferred
to
EPA's
electronic
public
docket.
Public
comments
that
are
mailed
or
delivered
to
the
docket
will
be
scanned
and
placed
in
EPA's
electronic
public
docket.
Where
practical,
physical
objects
will
be
photographed,
and
the
photograph
will
be
placed
in
EPA's
electronic
public
docket
along
with
a
brief
description
written
by
the
docket
staff.

C.
How
and
to
Whom
Do
I
Submit
Comments?

You
may
submit
comments
electronically,
by
mail,
or
through
hand
delivery/
courier.
To
ensure
proper
receipt
by
EPA,
identify
the
appropriate
docket
ID
number
in
the
subject
line
on
the
first
page
of
your
comment.
Please
ensure
that
your
comments
are
submitted
within
the
specified
comment
period.
Comments
received
after
the
close
of
the
comment
period
will
be
marked
``
late.''
EPA
is
not
required
to
consider
these
late
comments.
If
you
wish
to
submit
CBI
or
information
that
is
otherwise
protected
by
statute,
please
follow
the
instructions
in
Unit
I.
D.
Do
not
use
EPA
Dockets
or
e­
mail
to
submit
CBI
or
information
protected
by
statute.

[[
Page
54146]]

1.
Electronically.
If
you
submit
an
electronic
comment
as
prescribed
in
this
unit,
EPA
recommends
that
you
include
your
name,
mailing
address,
and
an
e­
mail
address
or
other
contact
information
in
the
body
of
your
comment.
Also
include
this
contact
information
on
the
outside
of
any
disk
or
CD
ROM
you
submit,
and
in
any
cover
letter
accompanying
the
disk
or
CD
ROM.
This
ensures
that
you
can
be
identified
as
the
submitter
of
the
comment
and
allows
EPA
to
contact
you
in
case
EPA
cannot
read
your
comment
due
to
technical
difficulties
or
needs
further
information
on
the
substance
of
your
comment.
EPA's
policy
is
that
EPA
will
not
edit
your
comment,
and
any
identifying
or
contact
information
provided
in
the
body
of
a
comment
will
be
included
as
part
of
the
comment
that
is
placed
in
the
official
public
docket,
and
made
available
in
EPA's
electronic
public
docket.
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.
i.
EPA
Dockets.
Your
use
of
EPA's
electronic
public
docket
to
submit
comments
to
EPA
electronically
is
EPA's
preferred
method
for
receiving
comments.
Go
directly
to
EPA
Dockets
at
http://
www.
epa.
gov/
edocket/
,
and
follow
the
online
instructions
for
submitting
comments.

Once
in
the
system,
select
``
search,''
and
then
key
in
docket
ID
number
OPPT­
2004­
0079.
The
system
is
an
``
anonymous
access''
system,
which
means
EPA
will
not
know
your
identity,
e­
mail
address,
or
other
contact
information
unless
you
provide
it
in
the
body
of
your
comment.
ii.
E­
mail.
Comments
may
be
sent
by
e­
mail
to
oppt.
ncic@
epa.
gov,
Attention:
Docket
ID
Number
OPPT­
2004­
0079.
In
contrast
to
EPA's
electronic
public
docket,
EPA's
e­
mail
system
is
not
an
``
anonymous
access''
system.
If
you
send
an
e­
mail
comment
directly
to
the
docket
without
going
through
EPA's
electronic
public
docket,
EPA's
e­
mail
system
automatically
captures
your
e­
mail
address.
E­
mail
addresses
that
are
automatically
captured
by
EPA's
e­
mail
system
are
included
as
part
of
the
comment
that
is
placed
in
the
official
public
docket,
and
made
available
in
EPA's
electronic
public
docket.
iii.
Disk
or
CD
ROM.
You
may
submit
comments
on
a
disk
or
CD
ROM
that
you
mail
to
the
mailing
address
identified
in
Unit
I.
C.
2.
These
electronic
submissions
will
be
accepted
in
WordPerfect
or
ASCII
file
format.
Avoid
the
use
of
special
characters
and
any
form
of
encryption.
2.
By
mail.
Send
your
comments
to:
Document
Control
Office
(
7407M),
Office
of
Pollution
Prevention
and
Toxics
(
OPPT),
Environmental
Protection
Agency,
1200
Pennsylvania
Ave.,
NW.,
Washington,
DC
20460­
0001.
3.
By
hand
delivery
or
courier.
Deliver
your
comments
to:
OPPT
Document
Control
Office
(
DCO)
in
EPA
East
Bldg.,
Rm.
6428,
1201
Constitution
Ave.,
NW.,
Washington,
DC.
Attention:
Docket
ID
Number
OPPT­
2004­
0079.
The
DCO
is
open
from
8
a.
m.
to
4
p.
m.,
Monday
through
Friday,
excluding
legal
holidays.
The
telephone
number
for
the
DCO
is
(
202)
564­
8930.

D.
How
Should
I
Submit
CBI
to
the
Agency?

Do
not
submit
information
that
you
consider
to
be
CBI
electronically
through
EPA's
electronic
public
docket
or
by
e­
mail.
You
may
claim
information
that
you
submit
to
EPA
as
CBI
by
marking
any
part
or
all
of
that
information
as
CBI
(
if
you
submit
CBI
on
disk
or
CD
ROM,
mark
the
outside
of
the
disk
or
CD
ROM
as
CBI
and
then
identify
electronically
within
the
disk
or
CD
ROM
the
specific
information
that
is
CBI).
Information
so
marked
will
not
be
disclosed
except
in
accordance
with
procedures
set
forth
in
40
CFR
part
2.
In
addition
to
one
complete
version
of
the
comment
that
includes
any
information
claimed
as
CBI,
a
copy
of
the
comment
that
does
not
contain
the
information
claimed
as
CBI
must
be
submitted
for
inclusion
in
the
public
docket
and
EPA's
electronic
public
docket.
If
you
submit
the
copy
that
does
not
contain
CBI
on
disk
or
CD
ROM,
mark
the
outside
of
the
disk
or
CD
ROM
clearly
that
it
does
not
contain
CBI.
Information
not
marked
as
CBI
will
be
included
in
the
public
docket
and
EPA's
electronic
public
docket
without
prior
notice.
If
you
have
any
questions
about
CBI
or
the
procedures
for
claiming
CBI,
please
consult
the
person
listed
under
FOR
FURTHER
INFORMATION
CONTACT.

E.
What
Should
I
Consider
as
I
Prepare
My
Comments
for
EPA?

We
invite
you
to
provide
your
views
on
the
various
options
we
propose,
new
approaches
we
have
not
considered,
the
potential
impacts
of
the
various
options
(
including
possible
unintended
consequences),
and
any
data
or
information
that
you
would
like
the
Agency
to
consider
during
the
development
of
the
final
action.
You
may
find
the
following
suggestions
helpful
for
preparing
your
comments:
1.
Explain
your
views
as
clearly
as
possible.
2.
Describe
any
assumptions
that
you
used.
3.
Provide
copies
of
any
technical
information
and/
or
data
you
used
that
support
your
views.
4.
If
you
estimate
potential
burden
or
costs,
explain
how
you
arrived
at
the
estimate
that
you
provide.
5.
Provide
specific
examples
to
illustrate
your
concerns.
6.
Offer
alternative
ways
to
improve
the
notice
or
collection
activity.
7.
Make
sure
to
submit
your
comments
by
the
deadline
in
this
notice.
8.
To
ensure
proper
receipt
by
EPA,
be
sure
to
identify
the
docket
ID
number
assigned
to
this
action
in
the
subject
line
on
the
first
page
of
your
response.
You
may
also
provide
the
name,
date,
and
Federal
Register
citation.

II.
What
Action
is
the
Agency
Taking?

EPA's
Office
of
Prevention,
Pesticides
and
Toxic
Substances
(
OPPTS)
provided
notice
on
October
31,
1995
(
60
FR
55376)
(
FRL­
4987­
3)
of
the
establishment
of
the
NAC/
AEGL
Committee
with
the
stated
charter
objective
as
``
the
efficient
and
effective
development
of
AEGLs
and
the
preparation
of
supplementary
qualitative
information
on
the
hazardous
substances
for
Federal,
State,
and
Local
agencies
and
organizations
in
the
private
sector
concerned
with
chemical
emergency
planning,
prevention,
and
response.''
The
NAC/
AEGL
Committee
is
a
discretionary
Federal
advisory
committee
formed
with
the
intent
to
develop
AEGLs
for
chemicals
through
the
combined
efforts
of
stakeholder
members
from
both
the
public
and
private
sectors
in
a
cost­
effective
approach
that
avoids
duplication
of
efforts
and
provides
uniform
values,
while
employing
the
most
scientifically
sound
methods
available.
In
this
document
the
NAC/
AEGL
Committee
is
publishing
proposed
AEGL
values
and
the
accompanying
scientific
rationale
for
their
development
for
15
hazardous
substances.
These
values
represent
the
eighth
set
of
exposure
levels
proposed
and
published
by
the
NAC/
AEGL
Committee.
EPA
published
``
Proposed''
AEGLs
for
12
chemicals
in
the
Federal
Register
of
October
30,
1997
(
62
FR
58840­
58851)
(
FRL­
5737­
3);
for
10
chemicals
in
the
Federal
Register
of
March
15,
2000
(
65
FR
14186­
14196)
(
FRL­
6492­
4);
for
14
chemicals
in
the
Federal
Register
of
June
23,
2000
(
65
FR
39263­
39277)
(
FRL­
6591­
2);
for
7
chemicals
in
the
Federal
Register
of
December
13,
2000
(
65
FR
77866­
77874)
(
FRL­
6752­
5)
for
18
chemicals
in
the
Federal
Register
of
May
2,
2001
(
66
FR
21940­
21964)
(
FRL­
6776­
3);
for
[[
Page
54147]]

8
chemicals
in
the
Federal
Register
of
February
15,
2002
(
67
FR
7164­
7176)
(
FRL­
6815­
8);
and
for
10
chemicals
in
the
Federal
Register
of
July
18,
2003
(
68
FR
42710­
42726)
(
FRL­
7189­
8)
in
order
to
provide
an
opportunity
for
public
review
and
comment.
Background
information
on
the
AEGL
Program
may
be
found
in
these
earlier
Federal
Register
notices,
in
the
EDocket,
or
on
the
AEGL
web
page
(
http://
www.
epa.
gov/
oppt/
aegl
).

Following
public
review
and
comment,
the
NAC/
AEGL
Committee
will
reconvene
to
consider
relevant
comments,
data
and
information
that
may
have
an
impact
on
the
Committee's
position
and
will
again
seek
consensus
for
the
establishment
of
Interim
AEGL
values.
Although
the
Interim
AEGL
values
will
be
available
to
Federal,
State
and
Local
agencies
and
to
organizations
in
the
private
sector
as
biological
reference
values,
it
is
intended
to
have
them
reviewed
by
a
subcommittee
of
the
National
Academies
of
Science
(
NAS).
An
NAS
subcommittee
review
will
serve
as
a
peer
review
of
the
Interim
AEGLs
and
the
subcommittee
will
be
the
final
arbiter
in
the
resolution
of
issues
regarding
the
AEGL
values,
and
the
data
and
basic
methodology
used
for
setting
AEGLs.
Following
concurrence,
``
Final''
AEGL
values
will
be
published
under
the
auspices
of
the
NAS.
The
NAC/
AEGL
Program
is
working
to
ensure
that
emergency
responders
and
risk
managers
in
this
country
and
abroad
are
armed
with
vital
information
they
need
to
protect
the
public
and
themselves
from
harm
in
the
event
of
chemical
accidents
or
homeland
security
emergencies.
Because
of
the
serious
nature
of
chemical
emergency
situations,
it
is
essential
that
involved
personnel
have
access
to
the
most
comprehensive
and
realistic
assessments
of
human
health
hazards
posed
by
released
chemicals.
Underestimation
of
human
health
hazard
would
not
be
protective,
while
over
estimation
might
suggest
a
larger
than
necessary
response
zone.
The
Department
of
Army
and
Federal
Emergency
Management
Agency
Chemical
Stockpile
Emergency
Preparedness
Program
(
CSEPP),
for
example,
has
adopted,
as
outlined
in
CSEPP
Policy
Paper
Number
20,
AEGLs
for
sulfur
mustard
and
nerve
agents
for
use
in
CSEPP
community
emergency
planning
and
response
activities
``
to
prevent
or
minimize
exposures
above
AEGL­
2,
above
which
some
temporary
but
potentially
escape­
impairing
effects
could
occur.''
Thus,
with
the
application
of
the
procedures
discussed
in
this
unit,
the
AEGL
Program
recognizes
the
importance
of
considering
all
available
domestic
and
international
test
data,
both
animal
and
human,
to
determine
threshold
levels
of
harm
for
a
range
of
exposure
scenarios
critical
to
those
at
the
front
line
in
defending
public
health.
The
process
for
development
of
AEGL
values
incorporates
essential
scientific
and
ethical
considerations
posed
by
the
possible
use
of
research
with
human
subjects.
All
human
studies
that
were
used
as
key
or
supporting
evidence
to
derive
AEGL
values
were
judged
acceptable
for
use
according
to
ethical
considerations
detailed
in
the
Standing
Operating
Procedures
for
Developing
Acute
Exposure
Guideline
Levels
for
Hazardous
Substances,
Subcommittee
on
Acute
Exposure
Guideline
Levels,
National
Research
Council,
National
Academy
Press,
2001,
p.
53.
The
SOP
states
``
The
NAC/
AEGL
Committee
is
dependent
upon
existing
clinical,
epidemiologic,
and
case
report
studies
published
in
the
literature
for
data
on
humans.
Many
of
these
studies
do
not
necessarily
follow
current
guidelines
on
ethical
standards
that
require
effective,
documented,
informed
consent
from
participating
human
subjects.
Further,
recent
studies
that
followed
such
guidelines
may
not
include
that
fact
in
the
publication.
Although
human
data
may
be
important
in
deriving
AEGL
values
that
protect
the
general
public,
utmost
care
must
be
exercised
to
ensure
first
of
all
that
such
data
have
been
developed
in
accordance
with
ethical
standards.
No
data
on
humans
known
to
be
obtained
through
force,
coercion,
misrepresentation,
or
any
other
such
means
will
be
used
in
the
development
of
AEGLs.
The
NAC/
AEGL
Committee
will
use
its
best
judgment
to
determine
whether
the
human
studies
were
ethically
conducted
and
whether
the
human
subjects
were
likely
to
have
provided
their
informed
consent.
Additionally,
human
data
from
epidemiologic
studies
and
chemical
accidents
may
be
used.
However,
in
all
instances
described
here,
only
human
data,
documents,
and
records
will
be
used
from
sources
that
are
publicly
available
or
if
the
information
is
recorded
by
the
investigator
in
such
a
manner
that
subjects
cannot
be
identified
directly
or
indirectly.
These
restrictions
on
the
use
of
human
data
are
consistent
with
the
`
Common
Rule'
published
in
the
Code
of
Federal
Regulations
(
Protection
of
Human
Subjects,
40
CFR
26,
2000).''
Additionally,
EPA
has
recently
asked
the
NAC/
AEGL
Committee
to
add
an
explicit
documentation
step
early
in
the
AEGL
development
process
that
the
studies
proposed
for
consideration
have
been
consistent
with
the
Program's
Standing
Operating
Procedures
(
SOPs).
Human
data
along
with
animal
data,
where
available,
were
used
to
develop
AEGL
values
for
11
out
of
15
chemicals
listed
in
this
FR
notice.
Human
data
were
not
used
as
key
or
supporting
studies
for
4
chemicals:
Chloroform;
methyl
mercaptan;
dimethylformamide;
and
nitric
oxide.
Each
human
study
used
in
the
development
of
AEGL
values
underwent
an
ethics
review.
There
was
no
evidence
to
suggest
that
the
studies
were
fundamentally
unethical,
or
significantly
deficient
relative
to
ethical
standards
prevailing
when
and
where
they
were
conducted.

III.
List
of
Chemicals
On
behalf
of
the
NAC/
AEGL
Committee,
EPA
is
providing
an
opportunity
for
public
comment
on
the
AEGLs
for
the
15
chemicals
identified
in
the
following
table.
Technical
Support
Documents
and
key
literature
references
may
be
obtained
as
described
in
Unit
I.
B.
1.

Table
1­­
Proposed
AEGL
Chemical
Table
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
Chemical
name
CAS
No.
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
Acetone
67­
64­
1
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
Acrolein
107­
02­
8
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
Carbon
disulfide
75­
15­
0
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
Chloroform
67­
66­
3
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
1,4­
Dioxane
123­
91­
1
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
Epichlorohydrin
106­
89­
8
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
Methylmercaptan
74­
93­
1
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
N,
N­
Dimethyl
formamide
68­
12­
2
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
Nitric
acid
7697­
37­
2
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
Nitric
oxide
10102­
43­
9
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
Nitrogen
dioxide
10102­
44­
0
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
Peracetic
acid
79­
21­
0
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
Sulfur
dioxide
7446­
09­
5
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
Trichloroethylene
79­
01­
6
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
Trimethylchlorosilane
75­
77­
4
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­

List
of
Subjects
Environmental
protection,
Acute
Exposure
Guideline
Levels,
AEGL,
Chemicals,
Hazardous
substances.

[[
Page
54148]]

Dated:
August
27,
2004.
Susan
B.
Hazen,
Acting
Assistant
Administrator,
Office
of
Prevention,
Pesticides
and
Toxic
Substances.

[
FR
Doc.
04­
20223
Filed
9­
3­
04;
8:
45
am]

BILLING
CODE
6560­
50­
S