2.
Response
to
Comments
2.9
Individual
Responses
to
Comments
from
Organizations
building
and
over
the
roof;
below,
it
flows
down
to
form
a
vortex
in
front
of
the
building
before
rushing
around
the
windward
corners.
The
resulting
increased
wind
speeds
and
turbulence
at
ground
level
can
represent
a
hazard
to
pedestrians.
This
phenomenon
is
greatest
with
a
single
tall
building
in
an
open
area
with
no
surrounding
structures,
and
can
vary
substantially
by
building
orientation,
massing,
and
adjacency
of
other
structures.
A
building
that
is
surrounded
by
taller
structures
is
not
likely
to
cause
adverse
wind
accelerations
at
ground
level,
while
even
a
comparatively
small
building
could
cause
wind
effects
if
it
were
freestanding
and
exposed.
Massing
is
important
in
determining
wind
impacts
because
it
controls
how
much
wind
is
intercepted
by
the
structure
and
whether
building-generated
wind
accelerations
occur
above
ground
or
at
ground
level.
In
general,
slab-shaped
buildings
have
the
greatest
potential
for
wind
acceleration
effects.
Buildings
that
have
an
unusual
shape,
rounded
faces,
or
utilize
setbacks
have
a
less
noticeable
wind
effect.
A
general
rule
is
that
the
more
complex
the
building
is
geometrically,
the
less
noticeable
the
probable
wind
impact
at
ground
level.
Building
orientation
also
affects
how
much
wind
is
intercepted
by
the
structure,
a
factor
that
directly
determines
wind
acceleration.
In
general,
buildings
that
are
oriented
with
the
wide
axis
across
the
prevailing
wind
direction
will
have
a
greater
impact
on
ground-level
winds
than
a
building
oriented
with
the
long
axis
along
the
prevailing
wind
direction.
The
risk
values
for
the
Kinder
Morgan
facility
and
other
stationary
sources
at
the
nearest
proposed
sensitive
receptors
are
presented
in
Table
4.B-20
of
the
Draft
EIR.
Impact
4.B-6
of
the
Draft
EIR
assesses
the
impacts
of
existing
stationary
sources
such
as
the
Kinder
Morgan
facility
as
well
as
roadway
sources
and
railway
contributions
to
increased
cancer
risk
and
hazard
impacts
on
proposed
receptors
relative
to
BAAQMD
identified
criteria.
This
impact
was
determined
in
the
Draft
EIR
to
be
less
than
significant.
The
compatibility
between
proposed
land
uses
within
the
Baylands
and
the
Kinder
Morgan
Tank
Farm
is
discussed
Both
BAAQMD
and
CARB
operate
toxic
air
contaminant
(TAC)
monitoring
networks
in
the
San
Francisco
Bay
Area.
These
stations
measure
10
to
15
TACs,
depending
on
the
specific
station.
The
nearest
BAAQMD
ambient
TAC
monitoring
station
to
the
Baylands
site
is
the
station
at
16th
and
Arkansas
Streets
in
San
Francisco.
The
Arkansas
Street
station
collects
data
for
acetaldehyde,
benzene,
1,3-butadiene,
carbon
tetrachloride,
formaldehyde,
perchloroethylene,
methylene
chloride,
chloroform,
trichloroethylene,
and
chromium.
Brisbane
Baylands
Final
EIR
2.9.2-18
May
2015