2.
Response
to
Comments
2.9
Individual
Responses
to
Comments
from
Organizations
compaction
(i.e.,
using
a
vibrating
probe)
are
not
proposed
at
this
time.
It
is
probable
that
many
development
sites
will
require
the
use
of
standard
soil
compactors.
Such
equipment
operates
at
a
noise
level
of
82
dBA
at
a
distance
of
50
feet
and
would
be
commensurate
with
the
noise
levels
generated
by
standard
construction
equipment
presented
in
Table
4.J-8
of
the
Draft
EIR
(FTA,
2006).
Consequently,
soil
compaction
activities
for
the
purposes
of
standard
foundation
work
would
not
result
in
any
different
noise
impacts
than
reported
in
the
Draft
EIR.
Planning
for
acceptable
noise
exposure
must
take
into
account
the
types
of
activities
and
corresponding
noise
sensitivity
in
a
specified
location
for
a
generalized
land
use
type.
Some
general
guidelines
are
as
follows:
sleep
disturbance
can
occur
at
levels
above
35
dBA;
interference
with
human
speech
begins
at
about
60
dBA;
and
hearing
damage
can
result
from
prolonged
exposure
to
noise
levels
in
excess
of
85
to
90
dBA
(USEPA,
1974).
The
World
Health
Organization
(WHO)
is
a
reliable
source
of
current
knowledge
regarding
the
health
effects
of
noise
impacts
because
European
nations
have
continued
to
study
noise
and
its
health
effects.
(WHO,
1999).
Potential
health
effects
of
noise
identified
by
WHO
include
decreased
performance
for
complex
cognitive
tasks,
such
as
reading,
attention
span,
problem
solving,
and
memorization;
physiological
effects
such
as
hypertension
and
heart
disease
(after
many
years
of
constant
exposure,
often
by
workers,
to
high
noise
levels);
and
hearing
impairment
(again,
generally
after
long-term
occupational
exposure).
Health-related
impacts
from
exposure
to
noise
would
be
a
concern
people
exposed
to
prolonged
(8-hour/day)
noise
levels
in
excess
of
90
dBA.
This
would
primarily
be
a
concern
for
construction
workers
who
may
be
in
close
enough
proximity
to
pile
drivers
(200
feet)
to
warrant
a
health
concern.
Restrictions
of
the
Occupational
Safety
and
Health
Administration
would
require
a
hearing
conservation
plan
for
workers,
including
hearing
protection.
The
nearest
sensitive
receptor
to
a
land
use
likely
requiring
pile
driving
would
be
proposed
residences
of
the
DSP
and
DSP-V
scenarios,
as
discussed
on
Draft
EIR
page
4.J-33.
The
only
construction
activity
noise
that
would
have
the
potential
to
reach
unhealthful
levels
would
be
pile
driving.
Prolonged
exposure
of
receptors
within
approximately
100
feet
of
pile
driving
could
have
adverse
health
effects.
The
Draft
EIR
identifies
a
significant
construction
noise
impact
and
Mitigation
Measure
4.J-
4a
which
requires
all
applicants
for
site-specific
development
within
the
Baylands
Site
shall
to
implement
site-specific
noise
attenuation
measures
during
all
construction-related
activities
under
the
supervision
of
a
qualified
acoustical
consultant
as
a
pre-requisite
to
issuance
of
site
grading(s).
These
measures
are
to
be
included
in
a
Noise
Control
Plan
that
shall
be
submitted
for
review
and
approval
by
the
City
of
Brisbane
Building
Department.
Brisbane
Baylands
Final
EIR
2.9.3-94
May
2015