
US
EPA
Public
Hearings
on
Particulate
Standards
Rajiv
Bhatia,
MD,
MPH
Director
of
Environmental
Health
San
Francisco
Department
of
Public
Health
San
Francisco
Vehicle
Volumes
Freeway
Impacts
on
Outdoor
Air
(
vs)
Distance
from
Edge
of
Freew
ay
0%

10%
20%
30%
40%
50%
60%
70%
80%
90%

1
00%
0
1
00
200
300
400
500
Distan
ce
from
Ed
g
e
o
f
F
re
eway
(
m)

Impacts
Normalized
to
Receptor
at
20
Meters
from
Edge
of
Freeway
Decrease
In
Concentration
of
Freeway
Diesel
PM
Emissions
With
Distance
(
meters)

Source
California
Air
Resources
Board
Air
Quality
Land
Use
Handbook
February
17,
2005
Standard
Setting,
Economic
Analysis,
Ethics,
and
Environmental
Justice

Health
costs
and
regulatory
costs
borne
by
different
groups

Standard
setting
must
prevent
disparate
impacts

Standard
setting
should
not
compromise
health

Protective
regulatory
standards
will
enable
their
feasibility
