From:
"
Farmer,
Mark"
<
Mark.
Farmer@
am.
sony.
com>
Sent:
08/
21/
03
07:
47
AM
To:
Lynn
Dail/
RTP/
USEPA/
US@
EPA
cc:
Subject:
Cobalt
Emissions
Update
Hello
Lynn,

Per
your
request,
below
please
find
a
summary
of
the
activities
to
identify
cobalt
streams
previously
unaccounted
for
and
subsequently
considered
as
emissions:

In
April
2003,
the
cumulative
cobalt
emissions
were
2.1
tons
per
twelve­
month
pe
riod.
As
a
result
of
emission
investigation,
the
cumulative
tons
ending
in
July
2003
have
been
reduced
to
0.7
tons
per
twelve­
month
period
which
has
resulted
i
n
a
66%
reduction.

The
reduction
occurred
in
relation
to
inventory
adjustments
stemming
from
the
in
vestigations
of
waste
streams.
Those
waste
streams
found
consisted
of
accumulat
ion
of
cobalt
under
condensation
hoods,
in
filters,
in
scrap
metal,
and
dust.
A
brief
description
follows
detailing
the
waste
streams.

1.
Approximately
one
year
of
accumulation
of
cobalt
(
420
pounds/
year)
was
locate
d
under
two
condensation
hood
cleaning
stands.
Areas
will
be
cleaned
monthly
an
d
cobalt
weight
added
to
the
monthly
inventory.
2.
Approximately
two
years
accumulation
of
cobalt
was
trapped
in
the
filters
of
the
dust
collection
systems
(
300
pounds/
year).
Filters
will
be
replaced
with
ne
w
ones
and
tracked
for
weight
increases.
3.
A
scrap
metal
waste
stream
was
identified
that
potentially
generated
2000
pou
nds
per
year.
The
monthly
emission
report
was
revised
back
to
April
2002.
This
weight
is
now
captured
in
the
monthly
cobalt
inventory.
4.
Other
sources
such
as
mop
water,
washing
machine
water,
and
cobalt
collection
on
the
ledges
of
the
dust
collection
system
were
evaluated.
The
weight
determi
ned
was
inappreciable.
5.
It
has
also
been
determined
that
there
is
build­
up
in
the
ductwork
of
the
dus
t
collection
system.
An
estimated
weight
of
approximately
20
pounds
has
been
id
entified
in
the
lower
bends
of
the
ducts.
A
further
extensive
investigation
wou
ld
be
required
to
determine
total
accumulation.

Hopefully
this
will
provide
you
with
necessary
data
to
be
able
to
demonstrate
th
at
additional
rulemaking
is
not
required.

Please
contact
me
if
you
have
any
questions
or
require
additional
information.

Regards,

Mark
Farmer
Sony
Magnetic
Products,
Inc
of
America
4275
West
Main
Street
Dothan,
AL
36305
