UNITED
STATES
ENVIRONMENTAL
PROTECTION
AGENCY
WASHINGTON,
D.
C.
20460
OFFICE
OF
PREVENTION,
PESTICIDES
AND
TOXIC
SUBSTANCES
November
19,
2004
Hand
Delivered
Mr.
Richard
L.
Conn
Charles
&
Conn,
LLC
6713
Catskill
Rd,
Lorton,
VA
22079­
1113
RE:
Ametryn
Drinking
Water
Exposure
Assessment
Memo
Dear
Mr.
Conn
On
November
4,
2004,
you
received
the
preliminary
human
health
and
environmental
risk
assessments
for
ametryn
from
the
Environmental
Protection
Agency
(
EPA
or
the
Agency).
At
that
time,
the
Drinking
Water
Exposure
Assessment
Memo
(
the
Drinking
Water
Memo)
was
not
included
with
the
risk
assessments.
Additional
important
information
about
timing
of
ametryn
use
in
Florida
had
been
received
but
not
yet
incorporated
into
the
Drinking
Water
Memo.
The
Agency
has
now
completed
the
Drinking
Water
Memo
and
it
is
enclosed
for
your
review.

As
with
the
ametryn
risk
assessments,
the
Agency
asks
that
you
please
identify
and
comment
on
any
technical
errors
in
the
Drinking
Water
Memo.
As
with
the
risk
assessments,
we
would
like
you
to
review
it
for
confidential
business
information
(
CBI),
and
you
must
inform
the
Agency
in
writing
of
any
CBI
claims
or
if
there
are
no
CBI
claims.

Please
submit
your
technical
error
correction
comments
for
the
Drinking
Water
Memo
by
December
6,
2004,
the
same
date
the
ametryn
risk
assessment
error
corrections
are
due.
As
a
reminder,
the
Agency
will
evaluate
your
comments
and
prepare
a
written
response,
and
will
revise
the
risk
assessments,
as
necessary.
Errors
include
mathematical,
computational,
typographic,
or
other
similar
errors.
At
this
stage,
EPA
will
respond
only
to
errors
that
do
not
pertain
to
matters
of
policy,
interpretation,
or
applicability
of
data.
In
January
2005,
EPA
will
release
to
the
public
the
risk
assessments,
your
comments,
and
the
Agency's
review
and
discussion
of
your
comments.
These
documents
will
be
placed
in
a
Public
Docket
and
posted
on
EPA's
Internet
site.
The
EPA
will
announce
the
availability
of
these
documents
via
a
Notice
of
Availability
in
the
Federal
Register,
and
through
an
electronic
listserver
message.
2
of
2
Please
send
your
comments,
including
any
claims
of
CBI
and
other
information,
in
both
printed
and
electronic
form
to
Mark
Howard,
the
Chemical
Review
Manager
for
ametryn.
If
you
have
any
questions,
please
contact
him
at
(
703)
308­
8172
and
howard.
markt@
epa.
gov.

Sincerely,

Michael
Goodis,
Chief
Reregistration
Branch
3
Special
Review
and
Reregistration
Division
Enclosure:

Drinking
Water
Exposure
Assessment
for
Proposed
Reregistration
of
Ametryn
Use
on
Corn,
Pineapple
and
Sugarcane
(
Revised).
November
17,
2004.
