2.
Response
to
Comments
2.9
Individual
Responses
to
Comments
from
Organizations
As
stated
in
the
Draft
EIR
on
page
4.G-78,
proposed
development
on
contaminated
sites
requires
an
approved
remedial
action
plan
to
be
completed
and
certified
by
the
overseeing
agency
(DTSC
or
RWQCB)
prior
to
development
or
any
change
in
existing
land
use.
The
former
landfill
would
be
closed
in
accordance
with
Title
27
requirements,
which
would
include
isolating
any
of
the
refuse
materials
from
surface
waters.
As
stated
on
page
4.G-80,
“a
surface
water
management
system
would
facilitate
surface
transport
of
stormwater
across
the
final
cover
and
off
of
the
landfill
surface.
Leachate
seeps
in
the
Central
Drainage
Channel
and
Brisbane
Lagoon
…would
be
addressed
by
reconstructing
the
channel
and
installing
a
layered
lining
system
that
includes
a
barrier
membrane
to
ensure
that
the
Central
Drainage
Channel
and
Brisbane
Lagoon
are
fully
isolated
from
any
leachate
migration
as
part
of
the
ongoing
remedial
activities
at
the
landfill.”
See
for
discussion
of
the
remediation
review
and
approval
process
and
5
for
discussion
regarding
compliance
with
the
law
as
mitigation
under
CEQA.
The
RWQCB
and
DTSC,
as
the
responsible
regulatory
authorities
for
site
remediation
and
Title
27
landfill
closure,
are
obligated
to
prevent
the
spread
of
hazardous
waste
and
leachate
in
accordance
with
risk-based
cleanup
goals
designed
to
protect
human
health
and
environment.
Because
sea
level
rise
can
be
reasonably
forecasted,
it
will
need
to
be
taken
into
account
in
relation
to
remedial
technologies
and
monitoring.
The
use
of
deep
foundation
pilings
in
a
brackish
environment
is
a
condition
that
is
commonly
encountered
throughout
the
San
Francisco
Bay
shoreline
and
elsewhere.
Current
design
standards
and
industry
standard
practices
can
prevent
corrosive
hazards
through
isolation
of
pilings
from
contact
with
brackish
water
and
use
of
corrosive
resistant
materials
that
have
proven
effective.
Specific
design
details
for
deep
foundation
design
have
not
yet
been
completed
as
these
would
depend
on
site-
specific
conditions
and
building
designs
that
would
be
determined
on
a
case-by-
case
basis.
Standard
structural
design
parameters
that
would
be
required
by
the
City
would
ensure
the
durability
and
safety
of
deep
foundation
pylons
in
a
brackish
environment
(as
described
in
Draft
EIR
Mitigation
Measure
4.E-2a:
“Prior
to
the
issuance
of
a
grading
permit,
applicants
for
all
site-specific
development
and
infrastructure
projects
within
the
Project
Site,
including
structures,
utilities,
and
roadways
shall
submit
to
the
City
Engineer
a
final
design-
level
geotechnical
report
prepared
by
a
licensed
geotechnical
or
soil
engineer
experienced
in
construction
methods
on
fill
materials
in
an
active
seismic
area.
The
report
shall
provide
site-specific
construction
methods
and
recommendations
regarding
grading
activities,
fill
placement,
soil
corrosivity/expansion/erosion
potential,
compaction,
foundation
construction,
drainage
control
(both
surface
and
subsurface),
and
avoidance
of
settlement,
liquefaction,
differential
settlement,
and
Brisbane
Baylands
Final
EIR
2.9.2-102
May
2015