John
Silvasi/
RTP/
USEPA/
US
08/
30/
2005
03:
19
PM
T
o
Art
Fraas,
Amy
Flynn
c
c
Jim
Ketcham­
Colwill,
Allen
Basala,
Jan
Tierney/
DC/
USEPA/
US@
EP
A,
Tom
Helms,
Denise
Gerth,
Robert
Meyers/
DC/
USEPA/
US@
EP
A,
Ron
Evans/
RTP/
USEPA/
US@
EP
A,
Lydia
Wegman/
RTP/
USEPA/
US@
EPA
S
u
b
j
e
c
t
TSD
for
economic
analysis
­
­
8­
hr
O3
NAAQS
implementation
rule
(
phase
2)

Hi,
Art
&
Amy,

As
noted
in
last
night's
email,
I
am
now
forwarding
to
you
the
Tech.
Support
Document
for
the
economic
analysis
(
difference
analysis)
that
accompanies
the
8­
hr
O3
NAAQS
implementation
rule
(
phase
2).

John
J.
Silvasi
Environmental
Engineer
Ozone
Policy
and
Strategies
Group
(
C539­
02)
Office
of
Air
Quality
Planning
and
Standards
U.
S.
Environmental
Protection
Agency
Research
Triangle
Park,
NC
27711
919­
541­
5666
(
v);
919­
541­
0824
(
fax)
