2.
Response
to
Comments
2.9
Individual
Responses
to
Comments
from
Organizations
events
within
the
piping
system
and
streets
such
that
buildings
are
protected
from
the
100-year
storm
with
1
foot
of
freeboard,
including
consideration
of
100
years
of
sea
level
rise.
CEQA
recognizes
that,
in
certain
instances,
it
may
be
impractical
to
devise
specific
mitigation
measures
during
the
planning
process.
In
these
instances,
a
lead
agency
may
defer
the
specific
design
of
a
mitigation
measure
if
it
there
is
a
reasonable
basis
for
the
agency
to
conclude
that
the
impacts
will
be
adequately
mitigated.
Mitigation
Measure
4.H-4b
is
based
on
a
specific,
enforceable
performance
standard
(provide
a
minimum
of
1-foot
of
freeboard
above
the
100-year
storm
event
with
tidal
flow
and
100
years
of
estimated
sea
level
rise),
and
compliance
with
this
standard,
among
others,
will
ensure
that
impacts
from
flooding
are
less
than
significant.
It
is
not
possible
to
specify
definitive
finished
floor
elevations
or
design
heights
at
a
program
level
of
analysis,
since
such
elevations
and
heights
would
vary
throughout
the
Baylands
Project
Site.
In
addition,
specifying
definitive
finished
floor
elevations
or
design
heights
would
not
be
desirable,
since
it
would
preclude
specific
site
design
options
such
as
grading
techniques
and
landscaped
berms.
Mitigation
Measure
4.H-4b
is
intended
to
address
flooding
and
not
water
quality,
which
is
addressed
separately
in
Mitigation
Measure
4.H-1c.
See
1
for
discussion
of
the
programmatic
nature
of
the
Brisbane
Baylands
Draft
EIR
and
environmental
review
requirements
for
subsequent
site-specific
development
projects.
Sea
level
rise
is
assessed
in
the
Draft
EIR
in
Section
4.H,
Surface
Water
Hydrology
and
Water
Quality
,
and
areas
within
the
Baylands
Project
Site
subject
to
100
years
of
sea
level
rise
are
identified
in
Figure
4.H-4.
Mitigation
Measure
4.H-8
is
intended
to
address
a
BCDC
requirement
for
preparation
of
sea
level
rise
risk
assessment
for
site-specific
development
projects,
none
of
which
are
currently
proposed.
Consistent
with
CEQA’s
requirements,
the
measure
specifies
the
required
contents
of
the
assessment,
and
further
requires
site-specific
development
on
the
Baylands
to
incorporate
measures
that
demonstrate
ability
to
convey
25-year
storm
event
completely
within
a
piping
system,
and
convey
100-year
storm
events
within
the
piping
system
and
streets
such
that
buildings
are
protected
from
the
100-year
storm
with
1
foot
of
freeboard,
including
consideration
of
100
years
of
sea
level
rise
in
accordance
with
the
San
Francisco
Bay
Plan.
See
1
for
discussion
of
the
programmatic
nature
of
the
Brisbane
Baylands
Draft
EIR.
Mitigation
Measure
4.J-2a
requires
all
residential
development
in
the
Baylands
to
be
designed
to
avoid
vibration
from
Caltrain
operations
in
excess
of
72
VdB.
Consistent
with
CEQA,
the
measure
relies
upon
future
vibration
studies
to
devise
Brisbane
Baylands
Final
EIR
2.9.9-10
May
2015