September
13,
2001
Mr.
Jack
Broadbent
Director,
Air
Division
U.
S.
EPA
Region
IX
75
Hawthorne
Street
AIR­
1
San
Francisco,
CA
94015
Re:
Maricopa
County
Serious
Nonattainment
Area
Plan
for
PM­
10
Dear
Mr.
Broadbent:

Enclosed
please
find
Maricopa
County's
update
on
the
outstanding
rule
evaluation
and
possible
rule
revision
issues
for
Fugitive
Dust
Source
package
of
rules.
The
update
includes
draft
revisions
to
our
existing
commitments.
These
revised
commitments
will
be
presented
to
the
Maricopa
County
Board
of
Supervisors
for
formal
consideration
and
approval
later
this
year.
Following
Board
action,
a
resolution
and
the
revised
commitments
will
be
submitted
to
you
no
later
than
December
2001.

In
this
document
we
review
progress
towards
fulfilling
the
three
commitments
and
update
the
timelines
and
those
commitments
to
reflect
what
has
happened
as
the
program
has
developed
since
December
1999.
You
will
note
that
current
research
has
not
yet
resulted
in
the
development
and
validation
of
new
test
methods
to
replace
the
opacity
test
method
in
our
rules.
As
a
result,
we
are
requesting
a
one­
year
extension
in
the
timelines
to
fulfill
our
previous
commitments.

Thank
you
for
your
cooperation
and
attention
in
addressing
our
PM­
10
nonattainment
area
issues.
If
you
have
any
questions,
please
do
not
hesitate
to
call
Jo
Crumbaker
of
my
staff
at
(
602)
506­
6705
or
call
me
at
(
602)
506­
6623.

Sincerely,

Al
Brown,
R.
S.,
M.
P.
A.
Director
Attachment
Cc:
Frances
Wicher,
EPA
Karen
Irwin,
EPA
Colleen
McKaughan,
EPA
MARICOPA
COUNTY
Environmental
Services
Dept.
Albert
F.
Brown,
M.
P.
A.,
R.
S.
1001
North
Central,
#
595
Director
Phoenix,
AZ
85004
(
602)
506­
6623
(
602)
506­
5141
FAX
(
602)
506­
6704
TDD
