~
D
s~
1)~
UNITED
STATES
ENV~
RONMENTALPROTECT~
ONAGENCY
WASHNGTON,
D.
C.
20460
~
4
LPRO~

OFFICE
OF
PREVENTION,
PESTICIDES
AND
JUL
2
6
2002
TOXIC
SUBSTANCES
Dr.
Peter
Voytek
HAP
Task
Force,
Manager
P.
O.
Box
331
Miliwood,
VA
22646
RE:
PK
ECA
for
Ethylene
Dichioride
(
OPPTS
­
42197C)

Dear
Dr.
Voytek:

EPA
has
completed
review
of
the
HAP
TASK
FORCE
October
30,
2001,
response
to
the
February
2001
draft
ECA
document
for
ethylene
dichioride
(
EDC).
It
appears
that
we
have
reached
agreement
on
the
remaining
points
and
much
of
your
suggested
language
has
been
incorporated
into
the
final
ECA
document.
Enclosed
is
the
final
ECA
for
signature
by
the
Test
Sponsors.

In
summary,
EPA
agrees
with
the
revised
pharmacokinetics
proposal,
which
the
HAP
Task
Force
expanded
and
clarified
in
Appendix
C
ofthe
ECA
document.
The
HAP
Task
Force's
request
for
additional
time
to
prepare
the
VCCEP
Tier
I
deliverables
has
been
extended
from
6
months
to
12
months.
In
addition,
EPA
agrees
that
the
purity
ofthe
test
substance
will
be
specified
as
being
at
least
99.0
percent
(
instead
of
~`.
.
at
least
99.5
percent.").
EPA
also
concurs
with
the
HAP
Task
Force's
deadlines
for
final
reports
(
see
Table
1
in
the
ECA
document).
Finally,
word
and
language
changes
suggested
by
the
Task
Force
were
agreeable
to
EPA,
as
was
the
inclusion
ofa
statement
on
sponsorship
of
VCCEP
testing,
where
denoted
on
the
individual
Test
Sponsor
signatory
pages.

At
your
request
EPA
pursued
with
ATSDR
the
additional
language
suggested
by
the
HAP
Task
Force
(
see
Section
IV,
page
3,
last
paragraph,
last
sentence
in
the
ECA
document)
seeking
to
clarify
ATSDR
priority
testing
needs
for
EDC
identified
in
the
Federal
Register
notice
of
August
14,
2001
(
66
FR
42659).
After
discussion
with
ATSDR,
EPA
concluded
that
while
many
of
ATSDR's
priority
data
needs
are
likely
to
be
fulfilled
by
the
testing
to
be
conducted
under
this
ECA,
it
would
be
inappropriate
for
EPA
to
make
any
prior
statements
on
behalf
of
another
agency.
It
would
be
more
appropriate
for
the
HAP
Task
Force
to
directly
interact
with
RecycIedIR~
cycIabI~
Printed
with
Vegetable
Oil
Based
Inks
on
100%
Recycled
Paper
(
40%
Postconsurner)
RECEIVED
OPPT
NCIC
2003
MAR11
5:
03PM
OPPT­
2003­
0010­
0053
ATSDR
to
determine
which
tests
pursued
under
the
ECA
will
also
satisfy
ATSDR's
priority
data
needs.
For
this
reason
I
trust
that
the
HAP
Task
Force
will
agree
that
the
original
draft
language
in
the
ECA
document
is
consistent
with
statements
made
in
the
proposed
HAP
Rulemaking
and
therefore
it
will
remain
unchanged
in
the
final
ECA.

Upon
receipt
ofa
signed
ECA
by
the
test
sponsors
(
and,
additionally,
all
the
final
attachments
for
the
Appendices)
the
ECA
document
will
be
transmitted
to
the
Assistant
Administrator
for
OPPTS
for
signature.
When
this
is
completed
I
will
send
you
a
copy
of
the
final
signed
agreement
and
a
copy
of
the
Federal
Register
notice
announcing
that
EPA
and
the
HAP
Task
Force
have
entered
into
an
enforceable
consent
agreement
for
EDC.
I
appreciate
the
efforts
that
you,
Caffey
Norman
and
the
entire
membership
of
the
HAP
Task
Force
have
made
to
reach
agreement
on
this
complex
testing
program.
If
you
have
any
questions
please
contact
John
Schaeffer
at
(
202)
564­
8173
or
Richard
Leukroth
at
(
202)
564­
8167.

Sincerely,

Charles
M.
Auer,
Director
Chemical
Control
Division
Enclosure
cc:
Docket
OPPTS
42198C
Caffey
Norman
John
Schaeffer
(
w/
o
end.)
Rich
Leukroth
(
w/
o
end.)
Michel
Stevens
MD­
52
(
w/
o
end.)
Deirdre
Murphy
C40401
(
w/
o
end.)

2
