2.
Response
to
Comments
2.9
Individual
Responses
to
Comments
from
Organizations
Brisbane’s
terrain.
Similar
noise
predictions
would
tend
to
be
more
conservative
for
more
low-lying
areas
of
the
community.
Please
refer
to
Response
The
first
bulleted
measure
of
Mitigation
Measure
4.J-4a
of
the
Draft
EIR
restricts
the
hours
of
construction
for
standard
construction
activities
(between
7:00
a.m.
and
7:00
p.m.
Monday
through
Friday
and
between
9:00
a.m.
and
7:00
p.m.
on
weekends
and
holidays).
Mitigation
Measure
4.J-4a
provides
even
more
restrictive
limits
on
pile
driving
(between
8:00
a.m.
and
4:00
p.m.
Monday
through
Friday,
with
no
extreme
noise-generating
activity
permitted
between
12:30
p.m.
and
1:30
p.m.
No
extreme
noise-generating
activities
would
be
allowed
on
weekends
and
holidays).
Health-related
impacts
from
exposure
to
noise
would
be
a
concern
for
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
implementation
of
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.
For
safety
reasons,
not
related
to
noise,
standard
construction
practice
is
for
construction
crews
to
secure
the
immediate
area
around
the
pile
driver
to
avoid
public
access
to
this
activity.
Pile-driving
noise
from
construction
in
the
CPP
or
CPP-V
scenarios
is
identified
in
the
first
paragraph
of
page
4.J-33
of
the
Draft
EIR
as
a
less-than-significant
impact.
Pile-driving
noise
from
construction
in
the
DSP
or
DSP-V
scenario
is
identified
in
the
third
paragraph
of
page
4.J-33
of
the
Draft
EIR
as
a
significant
impact.
This
is
because
the
DSP
and
DSP-V
scenarios
proposed
residential
development
that
would
locate
new
on-site
sensitive
receptors
within
400
feet
of
areas
mid-
and
high-rise
office,
entertainment
uses
or
hotel
structures
that
may
require
pile
driving.
Under
the
CPP
and
CPP-V
scenarios,
the
nearest
off-site
receptors
to
areas
of
mid-
and
high-rise
office,
entertainment
uses
or
hotel
structures
would
be
1,600
feet
away
(Desmond
Street
and
in
the
Little
Hollywood
neighborhood
in
San
Francisco)
at
which
distance
noise
from
pile
driving
would
be
attenuated
to
a
less-than-
significant
level.
The
last
paragraph
of
Draft
EIR
page
4.J-33
and
the
first
bullet
of
Mitigation
Measure
4.J-4a
define
“extreme
noise-
generating
activities”
as
those
generating
greater
than
90
dBA.
As
a
practical
matter,
this
would
include
impact
pile
driving
and
some
vibratory
pile
driving
Brisbane
Baylands
Final
EIR
2.9.2-126
May
2015