UNITED
STATES
ENVIRONMENTAL
PROTECTION
AGENCY
WASHINGTON,
D.
C.
20460
OFFICE
OF
PREVENTION,
PESTICIDES
AND
TOXIC
SUBSTANCES
PC
Code:
032501
CHEMICAL:
Disulfoton
DP
Barcode:
D280670A
March
7,
2002
MEMORANDUM
TO:
Betty
Shackleford,
CRM
Christina
Scheltema,
PM
Team
Reviewer
Michael
Goodis
Reregistration
Branch
3
Special
Review
and
Reregistration
Division
(7508W)

FROM:
James
K.
Wolf,
Ph.
D.,
Soil
Scientist
Environmental
Risk
Branch
3
THRU:
Kevin
J.
Costello,
Acting
Branch
Chief
Environmental
Risk
Branch
3
Environmental
Fate
and
Effects
Division
(7507C)

SUBJECT:
Correction
to
the
Disulfoton:
Summary
of
Estimated
Drinking
Water
Concentrations
(EDWCs)
use
in
the
Human
Health
Risk
Assessment
memo
DP
Barcode:
D280670,
date
February
25,
2002.

Footnote
number
2
for
Table
1
(page
2)
is
incorrect.
It
should
be
Barley
with
1.0
lb
ai/
A
application
has
an
EDWC
that
is
(1.00/
0.83)
larger
than
the
0.83
lb
ai/
A
application.
The
difference
between
the
to
the
two
granular,
soil
applied
barley
estimates
the
difference
in
application
rate
(0.83
lb
ai/
A
compared
to
1.0
lb
ai/
A).
Both
used
the
same
PCA
value
of
0.87.
The
incorrect
footnote
is
as
follows:
Barley
with
1.0
lb
ai/
A
application
has
an
EDWC
that
is
(1.0/
0.87)
larger
than
the
0.87
lb
ai/
A
application.
