Document ID: EPA-HQ-RCRA-2005-0015-0005
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2006-02-07T05:00Z

Rhonda,

Dave
relayed
a
message
to
me
that
you
had
a
question
concerning
origin
of
biodeg.
factor
for
MPD.

A
WWTP
biodegradation
factor
of
approx.
99%
for
MPD
we
reported
is
based
on
properties
found
in
the
EPA
Water9
model
database.
These
properties
are
then
provided
as
inputs
into
an
Enviromega
Toxchem
model
we
use
to
estimate
partitioning
in
the
plant.
The
relative
%
partitioning
factors
are
calculated
by
the
Toxchem
model.

If
you
have
any
more
questions,
please
let
me
know.

Rick
(
856)
540­
3285