NOTE
SUBJECT:
Consultation
with
Missouri
Department
of
Natural
Resources
TO:
File
FROM:
Stephen
Hoffman
DATE:
2/
27/
06
The
purpose
of
this
note
is
to
document
consultation
with
the
Missouri
Department
of
Natural
Resources
regarding
the
use
of
chat
in
pavement.
On
October
3,
2005
I
called
David
Mosby,
Missouir
DNR,
Remedial
Project
Manager,
Drew
Butten,
DNR,
Robert
Stout,
Director,
DNR,
and
Chris
Rittest,
Divison
of
Environmental
Quality
to
discuss
the
chat
rulemaking.

It
was
pointed
out
that
chat
may
not
be
leaching
high
amounts
of
lead
into
ground
water
rather
lead
leachate
may
be
bound
in
soils
and
leachate
may
flow
into
surface
waters.
MDNR
staff
indicated
that
there
was
little
data
on
the
use
of
chat
in
concrete.
There
is
some
evidence
that
public
works
had
used
chat
amended
concrete
in
sidewalks
in
Kansas
City.
There
also
appears
to
be
some
use
of
chat
as
a
agricultural
lime
additive.
Region
7
chat
guidelines
however
do
not
support
the
use
of
chat
for
this
use.

They
also
indicated
that
the
areal
scope
of
the
rule
should
include
Lawrence,
Barry,
Jasper
and
Newton
counties.
