1130
Connecticut
Avenue,
N.
W.
Suite
1250
Washington,
DC
20036
May
10,
2006
Stephen
Hoffman
Office
of
Solid
Waste
U.
S.
Environmental
Protection
Agency
Ariel
Rios
Building
1200
Pennsylvania
Avenue,
N.
W.
Washington,
DC
20460­
0002
Attention
Docket
ID
No.
EPA­
HQ­
RCRA­
2006­
0097
RE:
Criteria
for
the
Safe
and
Environmentally
Protective
Use
of
Granular
Mine
Tailings
Known
as
"
Chat"

Dear
Mr.
Hoffman:

The
Portland
Cement
Association
(
PCA)
respectfully
requests
that
comments
filed
by
the
association
on
May
4,
2006,
addressing
the
above
referenced
proposed
rulemaking 
which
was
proposed
in
the
Federal
Register
on
April
4,
2006
(
71
Fed.
Reg.
16729) 
be
withdrawn
from
the
rulemaking
docket.

PCA
no
longer
desires
to
place
any
comments
on
the
record
addressing
this
proposed
rule.

Thank
you
for
your
attention
to
this
matter.
I
may
be
reached
at
(
202)
408­
9494
to
address
any
questions
you
may
have
regarding
this
request.

Sincerely,

Andrew
T.
O'Hare
Vice
President
