Document ID: EPA-HQ-OAR-2003-0048-0051
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2004-02-23T05:00Z

From:
Denis
Lalonde
[
mailto:
lalonded@
norbord.
com]
Sent:
Wednesday,
October
01,
2003
9:
54
AM
To:
Hanks,
Katie
P.
Subject:
RE:
Question
regarding
conveyor
dryer
definitions
Hi
Katie,
see
our
opinion/
comments
below.
Please
call
me
if
you
have
any
questions
at
450­
447­
0409.

Regards,

Denis
­­­­­
Original
Message­­­­­
From:
Hanks,
Katie
P.
[
mailto:
kphanks@
rti.
org]
Sent:
Monday,
September
22,
2003
9:
55
AM
To:
'
lalondeD@
norbord.
com'
Cc:
Mary
Kissell
(
E­
mail);
'
quosaip@
norbord.
com'
Subject:
Question
regarding
conveyor
dryer
definitions
I
am
trying
to
write
definitions
of
"
conveyor
strand
dryer"
and
"
conveyor
strand
dryer
zone"
for
the
final
PCWP
rule.
I
would
appreciate
an
opinion
from
someone
in
the
PCWP
industry
who
uses
conveyor
dryers.
Below
is
what
I
have
drafted.
Do
these
definitions
make
sense
or
is
there
a
better
way
to
define?

"
Conveyor
strand
dryer"
means
a
conveyor
dryer
operated
at
elevated
temperature
and
used
to
reduce
the
moisture
of
wood
strands
used
in
the
manufacture
of
OSB,
LSL,
or
other
wood
strand­
based
products.
A
conveyor
strand
dryer
is
a
process
unit.

[
Norbord:
We
believe
"
elevated
temperature"
might
lead
to
confusion
in
interpretation.
It
is
probably
not
necessary
to
refer
to
a
temperature
level
(
elevated
or
low)
since
by
design
and
operation,
the
operating
temperatures
in
conveyor
dryers
are
inherently
and
relatively
low.
Elevated
temperatures
in
a
conveyor
dryer
will
inevitably
create
fires
in
the
dryers,
due
to
wood
dust
over­
drying
and
subsequent
combustion.
Consequently
we
suggest
that
the
definition
be:
"
Conveyor
strand
dryer"
means
a
conveyor
dryer
used
to
reduce
the
moisture
of
wood
strands
used
in
the
manufacture
of
OSB,
LSL,
or
other
wood
strand­
based
products.
A
conveyor
strand
dryer
is
a
process
unit."]

"
Conveyor
strand
dryer
zone"
means
each
portion
of
a
conveyor
strand
dryer
with
a
separate
heat
exchange
system
and
exhaust
vent.
Conveyor
dryers
typically
contain
three
zones,
which
may
be
divided
into
multiple
sections.

[
Norbord:
Each
zone
can
have
more
than
one
exhaust
vent,
therefore
the
word
vent
could
be
written
with
a
(
s)
eg.
exhaust
vent(
s).
Also,
it
is
possible
that
future
generations
of
conveyor
dryers
could
have
4
zones
instead
of
the
current
typical
3.
Is
the
word
"
typically"
flexible
enough
to
allow
for
different
number
of
zones,
in
the
future?]

Katie
Hanks
RTI
International
3040
Cornwallis
Road
Research
Triangle
Park,
NC
27709
(
919)
316­
3732
(
919)
541­
7155
(
fax)
kphanks@
rti.
org