2.
Response
to
Comments
2.9
Individual
Responses
to
Comments
from
Organizations
Cumulative
noise
impacts
addressing
high-speed
rail
are
discussed
on
Draft
EIR
page
6-35.
Given
the
cumulatively
significant
roadway
and
retail
loading
impacts
described
in
the
Draft
EIR,
and
the
potential
significant
noise
impacts
of
the
High
Speed
Rail
project,
cumulative
noise
impacts
would
affect
the
community
at
large,
although
the
magnitude
of
this
overall
increase
would
be
different
for
different
portions
of
the
community.
Consequently
the
cumulative
noise
impact
was
qualitatively
identified
because
it
would
be
speculative
to
quantify
changes
in
rail
activity
and
estimate
the
contribution
of
proposed
Project
Site
development
relative
to
the
potential
noise
impact
of
high-speed
rail
operations.
It
would
be
incumbent
upon
the
High
Speed
Rail
Authority
to
provide
mitigation,
to
the
extent
feasible,
for
the
noise
impact
contributions
of
that
foreseeable
project.
See
and
Several
mitigation
measures
in
the
Draft
EIR
protect
terrestrial
wildlife
species
from
disturbance
from
construction
noise
and
associated
vibration,
including
Mitigation
Measures
4.C-1c,
4.C-1d,
and
4.C-1f,
which
all
require
preconstruction
surveys
for
sensitive
species
prior
to
initiation
of
any
ground
disturbing
activities.
These
measures
require
that
if
sensitive
species
are
detected,
the
species
would
be
protected
from
disturbance
with
buffers
and
construction
work
windows.
The
establishment
of
no-disturbance
buffers
would
function
to
protect
species
from
noise
and
vibration
impacts.
The
nearest
structures
referred
to
on
Draft
EIR
page
4.J-23
are
single-story
concrete
warehouses
occupied
by
Recology
for
the
purposes
of
truck
maintenance.
The
predicted
vibration
level
of
0.01
inches
per
second
at
this
building
would
be
below
structural
damage
thresholds
for
even
fragile
buildings,
and
therefore
would
have
no
impact
on
the
identified
structures.
As
discussed
in
Response
Draft
EIR
page
4.D-16
notes
that
only
the
Roundhouse
and
the
Machinery
&
Equipment
Building
were
identified
as
historical
resources.
All
other
buildings
or
structures
were
found
ineligible
for
listing
as
historical
resources
as
they
did
not
meet
the
state
and
federal
evaluation
criteria.
As
such,
none
of
these
other
buildings
are
considered
historical
resources
for
purposes
of
CEQA.
Therefore,
no
additional
considerations
would
be
given
to
these
buildings
in
terms
of
vibration
effects
beyond
those
caused
by
standard
construction
methods.
Data
used
for
assessment
of
vibration
impacts
from
pile
driving
were
derived
from
the
U.S.
Department
of
Transportation’s
document
Transit
Noise
and
Vibration
Impact
Assessment.
This
document
identifies
vibration
levels
from
a
variety
of
construction
equipment
at
a
reference
distance
of
25
feet.
These
reference
values
were
used
to
calculate
the
Brisbane
Baylands
Final
EIR
2.9.2-117
May
2015