
Page
1
of
2
UNITED
STATES
ENVIRONMENTAL
PROTECTION
AGENCY
WASHINGTON,
D.
C.
20460
OFFICE
OF
PREVENTION,
PESTICIDES
AND
TOXIC
SUBSTANCES
MEMORANDUM
SUBJECT:
Pentachlorophenol:
Risk
Assessment
and
Science
Support
Branch's
Preliminary
Risk
Assessments
and
Science
Chapters
In
Support
of
The
Reregistration
Eligibility
Decision
FROM:
Norm
Cook,
Chief
Risk
Assessment
and
Science
Support
Branch
Antimicrobials
Division
(
7510C)

TO:
Connie
Welch,
Chief
Regulatory
Management
Branch
II
(
RMB­
II)
Antimicrobials
Division
(
7510C)

Pesticide
Chemical
63001
No.:

Chemical
Name:
Pentachlorophenol
Case:
2505
Introduction
With
this
cover
memo
the
Risk
Assessment
and
Science
Support
Branch
(
RASSB)
is
forwarding
Preliminary
Risk
Assessments
(
PRAs)
for
human
and
environmental
risks
with
Science
Chapters
in
Page
2
of
2
support
of
the
Antimicrobials
Division's
(
AD's)
Reregistration
Eligibility
Decision
(
RED)
for
Pentachlorophenol.
In
an
effort
to
avoid
duplication
RASSB
has
not
developed
an
Executive
Summary
for
creosote
since
the
PRAs
for
human
and
environmental
risks
are
presented
in
detail
in
their
Science
Chapters,
which
can
be
found
under
Attachments
8
and
11,
respectively.
The
following
Science
Chapters
are
included
as
attachments
to
this
memo:

Science
Chapters
Appendix
1:
Use
Profile
Appendix
2:
Product
Chemistry
Appendix
3:
Human
Exposure
Appendix
4:
Review
of
Worker
Exposure
Study
for
Pentachlorophenol
Appendix
5:
Toxicology
Appendix
6:
Epidemiology
Appendix
7:
Human
Risk
Characterization
Appendix
8:
Dietary
Exposure
and
Risk
Appendix
9:
Environmental
Fate
Appendix
10:
Environmental
Exposure/
Modeling
Appendix
11:
Ecological
Effects
and
Environmental
Risk
Characterization
