UNITED
STATES
ENVIRONMENTAL
PROTECTION
AGENCY
WASHINGTON,
D.
C.
20460
OFFICE
OF
PREVENTION,
PESTICIDES
AND
TOXIC
SUBSTANCES
CERTIFIED
MAIL
December
8,
2004
Allen
R.
Blem,
Ph.
D
Crompton
Corporation
74
Amity
Road
Bethany,
CT
06524
Re:
Preliminary
Risk
Assessments
for
the
Reregistration
Eligibility
Decision
for
Dimethipin
Dear
Dr.
Blem:

Enclosed
is
a
copy
of
the
preliminary
human
health
and
the
environmental
risk
assessment
for
the
reregistration
of
Dimethipin
including
its
uses
on
all
crops.
This
advance
opportunity
to
review
EPA's
pesticide
risk
assessments
for
errors
and
for
confidential
business
information
is
an
integral
part
of
a
wider
effort
to
involve
the
public
in
implementation
of
the
Food
Quality
Protection
Act
of
1996.
Accordingly,
the
EPA
is
following
the
public
participation
process
for
the
reregistration
of
Dimethipin,
as
described
in
the
Federal
Register
Notice
published
on
March
14,
2004
(
69
FR
26819).

Within
the
next
30
days,
please
identify
and
comment
on
any
errors
in
the
human
health
and
the
environmental
risk
assessment
documents.
During
this
phase
of
the
reregistration
process,
you
should
address
errors
such
as
mathematical,
computational,
or
typographic.
The
Agency
will
not
respond
to
errors
that
pertain
to
matters
of
policy,
interpretation,
or
applicability
of
data.
Upon
receipt
of
your
"
error
correction"
submission,
the
Agency
will
evaluate
and
respond
to
your
comments,
and
will
revise
the
risk
assessments
as
necessary.

Also,
in
order
to
assist
us
in
ensuring
that
your
confidential
business
information
(
CBI)
is
not
inadvertently
released
to
the
public,
we
request
that
you
review
the
risk
assessments
and
supporting
documents
for
CBI.
Please
inform
the
Agency
in
writing
of
any
claims
of
CBI
contained
in
this
document.
If
we
do
not
receive
notification
in
writing
of
any
such
claims,
within
30
days
from
the
receipt
of
this
letter,
we
may
assume
that
the
document
is
free
of
CBI.
2
Thirdly,
please
inform
EPA
of
any
pertinent
completed,
pending,
or
planned
studies,
and
any
other
sources
of
information
you
intend
to
submit
on
Dimethipin.
Providing
EPA
with
a
timetable
for
completing
and
submitting
such
information
will
enable
us
to
better
plan
for
refining
the
risk
assessments
and
completing
the
reregistration
and
tolerance
reassessments.

In
March,
2005,
EPA
expects
to
release
to
the
public
your
comments
to
both
preliminary
risk
assessments,
the
Agency's
review
and
discussion
of
your
comments,
and
the
revised
human
health
and
environmental
risk
assessments.
These
documents
will
be
placed
in
EPA's
electronic
docket
which
is
also
accessible
from
the
EPA's
website
(
www.
epa.
gov/
pesticides/
reregistration/
status.
htm).
The
EPA
will
announce
the
availability
of
these
documents
via
a
Notice
of
Availability
in
the
Federal
Register
and
through
an
electronic
listserver
message.

Please
send
your
response
in
both
printed
and
electronic
form,
within
30
days
of
receipt
of
this
letter,
including
claims
of
CBI,
and
other
information
to
me
at
the
address
listed
below:

Amaris
Johnson,
Chemical
Review
Manager
US
EPA
(
7508C)
1200
Pennsylvania
Avenue,
NW
Washington,
D.
C.
20460
If
you
have
any
questions,
please
feel
free
to
contact
me
at
(
703)
305­
9542
or
via
email
at
johnson.
amaris@
epa.
gov.
Thank
you.

Sincerely,

Amaris
K.
Johnson
Enclosures:
Dimethipin:
HED
Chapter
of
the
Reregistration
Eligibility
Decision
Document
(
RED).
Reregistration
Environmental
Risk
Assessment
for
Dimethipin.
Tier
I
Estimated
Environmental
Concentrations
of
Dimethipin,
for
use
in
Human
Health
Risk
Assessment.
Dimethipin
Chronic
Dietary
Exposure
Assessment
for
the
Reregistration
Eligibility
Decision
Dimethipin.
Residue
Chemistry
Considerations
for
Reregistration
Eligibility
Decision.
Dimethipin.
HED
Product
Chemistry
Chapter
for
Reregistration
Eligibility
Decision.
Occupational
and
Residential
Exposure
Assessment
and
Recommendations
for
the
Reregistration
Eligibility
Decision
Document
for
Dimethipin.
