Document ID: EPA-HQ-OPP-2003-0250-0003
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2004-03-11T05:00Z

1
Inclusive
of
arsenic
or
chromium
pesticide
chemicals
used
in
the
following
wood
preservative
formulations:
Chromated
Copper
Arsenate
(
CCA),
Ammoniacal
Copper
Zinc
Arsenate
(
ACZA),
Ammoniacal
Copper
Arsenate
(
ACA)
and
Acid
Copper
Chromate
(
ACC).

2
Active
ingredients
listed
as
arsenic
or
chromium
compounds
are
those
currently
supported
for
reregistration
as
wood
preservatives
under
Reregistration
Case
0132.
This
case
was
previously
identified
as
"
Chromated
Arsenicals"
in
OPP's
Spring
1998
"
Status
of
Pesticides
in
Registration,
Reregistration,
and
Special
Review
(
Rainbow
Report)"
and
included
the
following
additional
active
ingredients
which
are
currently
cancelled
and
therefore
no
longer
eligible
for
reregistration
review:

Sodium
arsenate
(
013505)
­
cancelled
2004;
Potassium
dichromate
(
068302)
­
cancelled
2000;
Sodium
pyroarsenate
(
013401)
­
cancelled
1991;
and
Sodium
chromate
(
068303)
and
Ammonium
arsenate
(
013601)
­
cancelled
1987.

An
arsenic
compound
which
is
outside
the
scope
of
this
Reregistration
Eligibility
Decision
(
RED)
document
is
Arsenic
trioxide
(
007001)
which
is
currently
registered
as
an
insecticide
for
use
in
ant
bait
products
and
therefore
not
a
wood
preservative.
The
technical
chemical
and
end­
use
product
registrations
are
managed
by
OPPs
Registration
Division
(
RD),
within
the
Insecticide­
Rodenticide
Branch.
The
Antimicrobials
Division
(
AD)
will
work
jointly
with
RD
on
the
reregistration
requirements
for
this
chemical.

Cupric
Oxide,
the
form
of
Copper
used
in
the
treatment
solutions
for
the
wood
preservatives
containing
arsenic
and/
or
chromium,
is
not
included
as
an
active
ingredient
covered
under
this
RED.
Reregistration
requirements
for
Cupric
Oxide
will
be
addressed
separately
in
a
RED
document
for
Copper,
and
oxides,
Case
Number
4025,
slated
to
be
issued
at
a
future
date.
Similarly,
zinc
oxide,
the
form
of
zinc
used
as
an
active
ingredient
in
the
formulations
of
ACZA
is
not
included
in
this
RED
because
it
has
been
addressed
in
the
RED
for
zinc
salts
(
EPA­
738­
F­
92­
007,
August,
2002).

1
I.
CASE
OVERVIEW:

A.
Chemical
Overview
The
following
active
ingredients
are
covered
by
this
Reregistration
Eligibility
Decision:
1
Active
Ingredient(
s):
2
CAS
Registry
Number:
OPP
Chemical
Code:
Empirical
Formula:
Molecular
Common
Weight:
Chemical
Name:

Arsenic
Acid
7778­
39­
4
006801
H3AsO4
141.93
Orthoarsenic
Acid
(
o­
Arsenic
Acid)

Arsenic
Pentoxide
1303­
28­
2
006802
As2O5
229.82
Arsenic
Acid
Anhydride
Chromic
Acid
7738­
94­
5
021101
CrO3
100.01
Chromic
Acid
Flake;
Chromium
Trioxide
Sodium
Dichromate
10588­
01­
9
068304
Na2Cr2O72H2O
298.05
Chromic
Acid,
Disodium
Salt
2

Chemical
Group:
Inorganic
Arsenicals
and
Chromium
compounds

Case
Number:
0132
Total
Number
of

Basic
Manufacturers:
Primary
Registrants
Registered
Products
Chemical
Specialties,
Inc.
5
Elementis
Chromium
LP
1
J.
H.
Baxter
1
Osmose,
Inc.
9
Phibro­
Tech,
Inc.
1
Total
Registered:

B.
Use
Profile
The
following
is
a
profile
of
the
currently
registered
uses
of
arsenical
and/
or
chromated
wood
preservatives.

Type
of
Pesticide:
Fungicide,
Insecticide,
Miticide
and
Molluscicide
Use
Sites:
Arsenic
and
chromium
compounds
used
as
wood
preservatives
are
Restricted
Use
Pesticides
specified
for
commercial
pressure
treatment
applications
only
(
i.
e.,
impregnated
into
forest
products
using
a
vacuum
pressure
system).

Terrestrial
Non­
Food
Crop:
(
Utility
Poles,
Cross
Ties,
Timbers,
Posts,
Lumber)

Wood
Protection
Treatment
to
Forest
Products
by
Pressure:
­
Wood
Protection
Treatment
to
Forest
Products
(
Seasoned)
­
Wood
Protection
Treatment
to
Forest
Products
(
Unseasoned)
­
Pesticides
for
Manufacturing,
Reformulating
or
Repackage
Use
­
Pesticide
Products
for
Formulation
of
Other
Products
­
Pesticide
Products
for
Tank
Mixes
Aquatic
Non­
Food
Outdoor:
(
Piles/
Posts/
Timbers
used
for
Aquatic
Structures)

Wood
Protection
Treatment
to
Forest
Products
by
Pressure:
3
­
Wood
Protection
Treatment
to
Forest
Products
(
Seasoned)
­
Wood
Protection
Treatment
to
Forest
Products
(
Unseasoned)

Residential
and
Farm
Indoor/
Outdoor:
(
Groundline­
contact
Building
Components,
Structural
Support
Timbers)

Wood
Protection
Treatment
to
Forest
Products
by
Pressure:
­
Wood
Protection
Treatment
to
Forest
Products
(
Seasoned)
­
Wood
Protection
Treatment
to
Forest
Products
(
Unseasoned)

Target
Pests:

Invertebrates:
(
Insects,
Miscellaneous
Invertebrates,
and
Related
Organisms.)

­
Wood
Boring
Insects
­
Termites
­
Ants
­
Carpenter
Ants
­
Marine
Borers
(
Limnoria
&
Teredo)

Plant
Pathogenic
Organisms:
(
Bacteria,
Fungi,
and
Other
Fouling
Organisms.)

­
Ascomycetes
­
Wood
Rot/
Decay
­
Wood
Rot/
Decay
Fungi
­
Wood
Rot/
Decay
Fungi
(
Spores)
­
Dry
Rot
­
Brown
Rot
­
White
Rot
Formulation
Types
Registered:
At
present
there
are
a
total
of
products
registered
with
the
U.
S.
EPA
for
wood
preservation,
containing
the
active
ingredients
arsenic
and
or
chromium,
as
follows:

Sources
of
Chromic
Acid:

Technical
Grade
Active
Ingredient
(
TGAI):
Crystalline
Flakes
(
OPP
Chemical
Code
021101)
98.7
%
­
100
%
(
products)

Industrial
End­
Use
Product
(
EUP):
Liquid
(
OPP
Chemical
Code
068304)
70%
(
1
product)
4
Sources
of
Arsenic
Acid:

Manufacturing­
Use
Product/
Formulator­
Use
Product
(
MUP):
Formulation
Intermediate
(
Liquid)
75%
(
2
products)
(
OPP
Chemical
Code
006801)

Industrial
End­
Use
Product
(
EUP):
Liquid
75%
(
products)
(
OPP
Chemical
Code
006801)

Formulated
Mixtures
of
CCA:

Industrial
End­
Use
Product
(
EUP):
Soluble
Concentrate
(
Liquid)
40%
­
72%
(
products)
(
OPP
Chemical
Codes
021101
&
006802)

Formulated
Mixture
of
ACC:

Industrial
End­
Use
Product
(
EUP):
Soluble
Concentrate
(
Liquid)
50%
(
1
product)
(
OPP
Chemical
Code
021101)

(
Total
23
products)

Types
and
Rates
of
Application:
The
following
covers
application
types
and
rates
specified
on
the
product
labeling,
or
derived
from
information
provided
by
industry
sources
[
i.
e.,
the
American
Chemistry
Council
(
ACC)
Arsenical
Task
Force
members,
and
the
American
Wood­
Preservers'
Association
(
AWPA)
Book
of
Standards].

Terrestrial
Non­
Food
Crop
Wood
Pressure
Treatment
to
Forest
Products:
Nonsoil
Contact
Nonfumigation
Soil
Contact
Nonfumigation
Vacuum
Pressure
System
Wood
Protection
Treatment
Types
of
Treatment:
Pressure
Treatment;
Vacuum
Pressure
Treatment.

Equipment:
Pressure
Treating
Cylinder/
Vessel/
Retort.

Timing:
Prior
to
end
use
of
wood.
5
Use
Rate:
Pressure
treatments
conducted
as
specified
by
the
AWPA
Standards
for
wood
treaters.
For
waterborne
preservatives
such
as
Chromated
Copper
Arsenate
(
CCA),
Ammoniacal
Copper
Zinc
Arsenate
(
ACZA),
Ammoniacal
Copper
Arsenate
(
ACA)
and
Acid
Copper
Chromate
(
ACC):

AWPA
Preservative
Retention
Requirements
for
Southern
Pine:
1
Use
Application
for
Wood
Treated
with
CCA,
ACZA,
ACA,
and
ACC
Retention
(
lb/
ft3)

Above
ground
lumber/
timbers
0.25
Ground
contact/
Fresh
water
contact
lumber/
timbers
0.40
(
0.50
for
ACC)

Salt
water
splash
contact/
Permanent
wood
foundation/
Structural
poles
(
utility
poles)
2
0.60
Fresh
water
foundation
piles
2
0.80
­
1.00
Salt
water
immersion
marine
piles
2
2.50
1Retention
levels
are
specified
on
an
oxide
basis.
2Treatment
with
ACC
not
recommended
for
this
use
application.

C.
Estimated
Usage
of
Pesticide
This
section
summarizes
the
best
estimates
available
for
the
wood
preservatives
containing
arsenic
and/
or
chromium.
These
estimates
are
derived
from
a
variety
of
published
and
proprietary
sources
available
to
the
Agency.

Technical
sources
of
Arsenic
used
as
wood
preservatives
are
derived
from
Arsenic
trioxide
imported
principally
from
China
to
produce
Arsenic
acid
for
formulation
of
CCA
and
related
arsenicals.
About
90%
of
all
arsenic
consumed
is
for
the
production
of
wood
preservatives
(
U.
S.
Geological
Survey,
Mineral
Commodity
Summaries,
1997).
Statistics
indicate
that
wood
preservatives
make
up
72%
of
the
Chromic
acid
market
(
Chemical
Market
Reporter,
2000).

According
to
EPA
sources,
the
most
common
of
the
waterborne
preservatives
is
CCA
(
as
Type
C
containing
47.5%
chromium,
18.5%
copper,
and
34%
arsenic)
which
by
the
mid­
1990'
s
represented
90%
of
the
U.
S.
waterborne
preservatives
market.
Market
statistics
for
2002
indicated
that
there
were
close
to
350
wood
treatment
plants
in
the
US
that
used
CCA.
The
U.
S.
consumed
71,700
metric
tons
of
CCA
in
1999
(
Chemical
Market
Reporter,
2002).
In
1996
the
total
volume
of
CCA­
treated
wood
products
was
estimated
at
467
million
cubic
feet.
(
American
Wood
Preservers
Institute,
1996).

D.
Data
Requirements
The
Agency
required
registrants
to
submit
studies
in
response
to
Registration
Standards
issued
in
1986
and
1988
(
PB87­
114088,
and
PB89­
102842)
for
chromated
arsenical
compounds.
6
Data
from
submitted
studies
along
with
more
recent
industry­
sponsored
studies
were
used
to
characterize
the
risks
associated
with
the
uses
described
in
this
document.

C.
Regulatory
History
The
wood
preservative
pesticides
containing
arsenic
and/
or
chromium
compounds
are
registered
as
technical
source/
manufacturing­
use
products
or
formulated
industrial
end­
use
product
concentrates
or
mixtures
intended
for
aqueous
dilution
to
form
CCA,
ACZA,
ACA
and
ACC
treatment
solutions.
Formulated
wood
preservative
products
containing
arsenic
and/
or
chromium
compounds
have
been
registered
since
the
1940'
s
when
pesticides
were
under
the
regulatory
purview
of
the
United
States
Department
of
Agriculture
(
USDA),
and
since
its'
inception
in
the
1970'
s,
regulated
under
FIFRA
with
the
U.
S.
EPA.
Presently,
products
are
registered
for
pressure
treatment
of
wood
intended
for
above
ground
and
ground
contact,
as
well
as
in
fresh
water
and
marine
environments.
Wood
treated
with
these
preservatives
are
specified
for
commercial,
institutional,
and
limited
residential/
farm
construction
uses
in
indoor
and
outdoor
sites.
All
products
are
Restricted
Use
Pesticides;
Chromic
acid,
2
are
manufacturing­
use
product
sources
of
Arsenic
acid;
4
are
industrial
end­
use
product
sources
of
either
Chromic
acid
or
Arsenic
acid,
and
11
are
industrial
end­
use
product
mixtures
of
CCA,
and
1
is
an
industrial
end­
use
product
mixture
of
ACC.

In
October
of
1978
the
Agency
initiated
an
administrative
review
process
by
issuing
notices
of
"
Rebuttable
Presumption
Against
Registration
(
RPAR)"
to
consider
whether
the
pesticide
registrations
of
chromated
and
non­
chromated
arsenical
wood
preservatives
should
be
cancelled
or
modified
due
to
toxicological
effects
attributed
to
the
pesticides.
The
Federal
Register
Notice
(
Vol.
49,
No.
136)
of
July
13,
1984
concluded
the
RPAR
process
and
announced
that
certain
changes
in
the
terms
and
conditions
of
registration
were
required
if
registrants
and
applicants
wished
to
avoid
cancellation
(
see
"
RPAR
Settlement
Use
Conditions"
below).

EPA
evaluated
the
potential
risks
of
these
wood
preservative
chemicals
to
public
health,
along
with
the
significant
economic
benefits
resulting
from
their
use.
The
Agency
subsequently
determined
that
the
use
of
these
wood
preservative
chemicals
in
accordance
with
certain
modifications
to
the
terms
of
registrations
would
satisfy
the
statutory
standard
for
products'
registration.
Details
of
the
modifications
as
stated
below
are
in
the
Federal
Register
of
January
10,
1986
(
Vol.
51,
No.
7)
and
January
21,
1987
(
Vol.
52,
No.
13).

RPAR
Settlement
Use
Conditions:

Arsenical
and/
or
chromated
wood
preservatives
are
now
classified
as
"
RESTRICTED
USE"
pesticides,
meaning
that
these
chemical
are
for
sale
and
use
only
by
certified
applicators
or
persons
under
their
direct
supervision
and
only
for
those
uses
covered
by
the
applicator's
certification.
The
product
labeling
includes
some
of
the
following
statements:

"
RESTRICTED
USE
PESTICIDE­­
For
Sale
to
and
Use
By
Certified
Applicators
..."
7
"
RESTRICTED
USE
PESTICIDE­­
Due
to
Acute
Toxicity
and
Because
This
Product
Contains
Arsenic
and/
or
Chromium
Compounds
Some
Types
of
Which
Have
Been
Associated
with
Tumor
Development
in
Humans."

"
Do
not
apply
in
interiors.
Do
not
apply
to
wood
intended
for
use
in
interiors
except
for
those
support
structures
which
are
in
contact
with
the
soil
in
barns,
stables
and
similar
sites
and
which
are
subject
to
decay
or
insect
infestation
.
.
."

Protective
clothing
requirements
for
workers
must
be
specified
on
labels.

All
exposed
arsenic
treatment
plant
workers
are
required
to
wear
a
respirator
if
the
level
of
ambient
arsenic
is
unknown
or
exceeds
a
Permissible
Exposure
Limit
(
PEL)
of
10
ug/
m3
averaged
over
an
8­
hour
work
day.

Manufacturers
and
formulators
must
use
a
closed
system
for
mixing
powdered
inorganic
arsenicals.

Applicators
may
not
eat,
drink,
or
use
tobacco
products
during
the
application
process.
Applicators
must
also
wash
thoroughly
after
skin
contact
with
the
pesticide.

A
Consumer
Awareness
Program
was
instituted
requiring
wood
pressure­
treaters
to
provide
Consumer
Information
Sheets
to
all
lumber
yards
and
other
retailers.
The
information
sheets
instruct
consumers
about
handling
procedures,
such
as
the
use
of
protective
gloves,
coveralls
and
face
masks
when
sawing
treated
wood
products.

EPA
has
required
specific
labeling
use
instructions
for
arsenical
and/
or
chromated
wood
preservative
end­
use
products.
These
instructions
require
the
use
of
diluted
solutions
(
0.5
­
10%)
only
in
closed,
vacuum­
pressure
cylinders.
Industry
treatment
standards
must
be
strictly
adhered
to
in
order
to
minimize
worker
exposure
and
environmental
contamination.

The
following
precautions
for
working
with
wood
treated
with
arsenic
and/
or
chromiumbased
preservatives
resulted
from
the
special
review
and
are
included
on
the
Consumer
Safety
Information
Sheets,
which
should
be
available
at
all
establishments
where
arsenical
and/
or
chromated
wood
preservative­
treated
wood
can
be
purchased.
These
efforts
are
especially
important
when
conducting
activities
that
generate
sawdust
from
treated
wood,
since
there
is
a
greater
likelihood
of
exposure
to
arsenic
and/
or
chromium
from
such
activities
than
there
is
from
ordinary
contact
to
wood
surfaces.

Consumers
working
with
arsenic
and/
or
chromium­
treated
wood
should
wear
long­
sleeve
shirts,
long
pants,
and
gloves
impervious
to
the
chemicals,
such
as
vinyl­
coated
gloves.

If
sawdust
accumulates
on
clothes,
wash
them
separately
from
other
household
clothes
before
reuse.
8

Avoid
frequent
or
prolonged
inhalation
of
sawdust
from
treated
wood.
Wear
a
dust
mask
when
sawing
and
machining.
Always
wear
goggles
to
protect
your
eyes
from
flying
particles
when
power­
sawing
and
machining.

If
possible,
work
outdoors
to
avoid
indoor
accumulation
of
sawdust
from
treated
wood.

Wash
exposed
body
areas
thoroughly
with
soap
and
water
after
working
with
treated
wood.
Clean­
up
thoroughly
before
eating,
drinking
or
using
tobacco
products.

The
registrants
promised
to
phase
out
all
uses
of
CCA­
products
with
the
exception
of
the
treatment
of
wood
products
that
fall
under
the
American
Wood­
Preservers'
Association
(
AWPA)
standards
(
based
on
the
2001
edition
of
the
AWPA
Standards)
listed
in
the
text
of
the
approved
label
amendment.
The
phase
out
of
uses
affected
virtually
all
residential
uses
of
wood
treated
with
CCA
including
wood
used
in
play
structures,
decks,
picnic
tables,
landscaping
timbers,
gazebos,
residential
fencing,
patios,
walkways,
boardwalks,
etc.

In
response
to
the
Agency's
solicitation
for
public
comments,
approximately
6,700
comments
were
submitted
by
the
wood
preservative
industry,
the
chromium
industry,
the
lumber
industry,
the
agricultural
industry,
Kentucky
and
Texas
State
government
officials,
federal
government
officials,
environmental
groups,
businesses
and
private
citizens
of
Corpus
Christi,
Texas,
as
well
as
from
others.
A
number
of
comments
were
received
for
uses
which
the
commenters
believed
posed
no
or
little
risk
of
exposure
to
the
public
including
the
use
on
fence
posts
in
agricultural
settings.

On
April
9,
2003,
the
Agency
published
its
response
to
the
use
terminations
and
products
cancellations
voluntarily
requested
by
the
registrants
in
the
federal
register
(
68
FR
17366,
Vol
68,
Number
68).
Rather
than
delay
acceptance
of
portions
of
the
requests
until
completion
of
the
reregistration
review,
EPA
decided
to
accept
the
requests
for
cancellation/
use
termination
for
all
other
uses
and
defer
action
with
respect
to
the
requests
to
terminate
agricultural
fence
post
and
permanent
wood
foundation
uses
pending
the
complete
evaluation
of
these
uses
through
the
reregistration
process.

Specifically,
the
notice
announced
the
cancellation
of
the
two
affected
products,
effectively
March
17,
2003,
the
date
upon
which
the
Agency
signed
and
issued
the
cancellation
order.
9
Registrants
were
allowed
60
days
thereafter
(
until
May
16,
2003)
in
which
to
sell
or
distribute
the
cancelled
products
concerned,
and
to
revise
the
labels
for
other
products
with
use
terminations,
effective
as
of
May
16,
2003.
In
addition
to
stating
the
Agency's
response
to
the
requests,
the
notice
also
addressed
the
considerable
number
of
comments
received
in
response
to
the
Agency's
requests
for
public
comments
on
the
registrants'
requests.

As
per
the
Federal
Register
Notice
(
68
FR
17366,
Vol
68,
Number
68)
the
following
statements
have
been
stipulated
as
label
amendments
for
affected
MUP's
as
arsenic
source
products:

"
Effective
December
31,
2003,
this
product
may
only
be
used
(
1)
for
formulation
of
the
following
end­
use
wood
preservative
products:
ammoniacal
copper
zinc
arsenate
(
ACZA)
or
chromated
copper
arsenate
(
CCA)
labeled
in
accordance
with
the
Directions
for
Use
shown
below,
or
(
2)
by
persons
other
than
the
registrant,
in
combination
with
one
or
more
other
products
to
make:
ACZA
wood
preservative;
or
CCA
wood
preservative
that
is
used
in
accordance
with
the
Directions
for
Use
shown
below.

Effective
December
31,
2003,
this
product
may
only
be
used
for
preservative
treatment
of
the
following
categories
of
forest
products
and
in
accordance
with
the
respective
cited
standard
(
noted
parenthetically)
of
the
2001
edition
of
the
American
Wood­
Preservers'
Association
Standards:
Lumber
and
timber
for
Salt
Water
Use
Only
(
C2),
Piles
(
C3),
Poles
(
C4),
Plywood
(
C9),
Wood
for
Highway
Construction
(
C14),
Round,
Half
Round
and
Quarter
Round
Fence
Posts
(
C16),
Poles,
Piles
and
Posts
Used
as
Structural
Members
on
Farms
and
Plywood
Used
on
Farms
(
C16),
Wood
for
Marine
Construction
(
C18),
Lumber
and
Plywood
for
Permanent
Wood
Foundations
(
C22),
Round
Poles
and
Posts
Used
in
Building
Construction
(
C23),
Sawn
Timber
Used
to
Support
Residential
and
Commercial
Structures
(
C24),
Sawn
Crossarms
(
C25),
Structural
Glued
Laminated
Members
and
Laminations
Before
Gluing
(
C28),
Structural
Composite
Lumber
(
C33),
and
Shakes
and
Shingles
(
C34).
Forest
products
treated
with
this
product
may
only
be
sold
or
distributed
for
uses
within
the
AWPA
Commodity
Standards
under
which
treatment
occurred."

As
per
the
Federal
Register
Notice
(
68
FR
17366,
Vol
68,
Number
68)
the
following
statements
have
been
stipulated
as
label
amendments
for
affected
EUP's:

"
Effective
December
31,
2003,
this
product
may
only
be
used
for
preservative
treatment
of
the
following
categories
of
forest
products
and
in
accordance
with
the
respective
cited
standard
(
noted
parenthetically)
of
the
2001
edition
of
the
American
Wood­
Preservers'
Association
Standards:
Lumber
and
timber
for
Salt
Water
Use
Only
(
C2),
Piles
(
C3),
Poles
(
C4),
Plywood
(
C9),
Wood
for
Highway
Construction
(
C14),
Round,
Half
Round
and
Quarter
Round
Fence
Posts
(
C16),
Poles,
Piles
and
Posts
Used
as
Structural
Members
on
Farms
and
Plywood
Used
on
Farms
(
C16),
Wood
for
Marine
Construction
(
C18),
Lumber
and
Plywood
for
Permanent
Wood
Foundations
(
C22),
Round
Poles
and
Posts
Used
in
Building
Construction
(
C23),
Sawn
Timber
Used
to
Support
Residential
and
Commercial
10
Structures
(
C24),
Sawn
Crossarms
(
C25),
Structural
Glued
Laminated
Members
and
Laminations
Before
Gluing
(
C28),
Structural
Composite
Lumber
(
C33),
and
Shakes
and
Shingles
(
C34).
Forest
products
treated
with
this
product
may
only
be
sold
or
distributed
for
uses
within
the
AWPA
Commodity
Standards
under
which
treatment
occurred."

In
a
letter
to
the
Agency
(
dated
February
7,
2003),
Osmose,
Inc.
and
Osmose
Utilities
Services,
Inc.
requested
the
voluntary
cancellation
of
the
registration
for
the
three
non
pressuretreated
uses
of
CCA
products.
Following
the
announcement
of
the
"
notice
of
receipt
of
request
to
voluntarily
cancel
certain
pesticide
registration"
(
68
FR
18635,
April
16,
2003)
with
a
30
day
comment
period,
orders
were
issued
by
the
Agency
granting
the
cancellation
of
the
three
products,
effective
May
28,
2003.

The
Agency
in
its
letter
of
June
19,
2003,
informed
Osmose,
Inc.
(
the
sole
registrant
of
Acid
Copper
Chromate
­
ACC)
of
the
absence
of
data
necessary
to
support
the
continued
registration
of
ACC
50%
(
the
only
registered
ACC
product),
and
outlined
the
data­
gaps
required
for
reregistration.
ACC
contains
no
arsenic
but
does
have
approximately
50
percent
more
chromium
(
hexavalent)
than
formulations
of
CCA.
Due
to
the
extensive
time
and
technical
resources
that
would
be
needed
to
fulfill
the
data­
gaps,
Osmose,
Inc.
decided
to
no
longer
support
the
registration
of
the
product,
and
submitted
a
request
(
June
30,
2003)
for
voluntary
cancellation.

Osmose
has
not
sold
this
product
for
the
last
two
years
and
prior
to
that
time,
its
only
use
was
on
wood
for
cooling
towers.
Based
on
the
receipt
of
this
request,
the
Agency
has
not
specifically
assessed
the
risks
associated
with
ACC
in
this
RED.
The
Agency
has
however,
received
"
metoo
applications
from
two
applicants
for
ACC
products.
A
decision
has
been
made
to
not
act
on
the
Osmose
voluntary
cancellation
until
such
time
that
a
decision
on
the
"
me­
toos"
is
made.
The
Agency
has
concerns
about
the
increased
amount
of
hexavalent
chromium
in
ACC
and
has
informed
the
"
me­
too"
applicants
that
it
needs
additional
data/
information
before
it
can
accurately
assess
the
potential
risks
associated
with
this
chemical's
use.
Consequently,
an
assessment
for
ACC
is
not
included
in
this
RED
document
but
will
be
separately
addressed
in
the
Agency's
revised
risk
assessment,
should
the
Agency
make
the
decision
to
grant
these
applications.