2.
Response
to
Comment
2.4
Master
Responses
to
Comments
(4)
(5)
Ongoing
consolidation
of
refuse
and
Bay
Muds;
and
Control
of
landfill
gas.
To
accomplish
this,
the
Final
Closure
and
Post-closure
Plans
to
be
approved
by
the
regulatory
agencies
in
compliance
with
Title
27
will
include
requirements
for:
(1)
(2)
(3)
(4)
Installation
of
a
final
cover
system
over
the
landfill;
Operation
and
maintenance
of
a
leachate
seep
collection
and
transmission
system;
Operation
and
maintenance
of
a
landfill
gas
collection
and
control
system;
and
Continued
groundwater,
surface
water,
and
leachate
quality
monitoring.
Additionally,
proposed
development
within
the
former
landfill
area
will
be
subject
to
land
use
controls
such
as
deed
restrictions
and
require
notifications
to
the
regulatory
agencies
in
advance
of
future
ground
disturbing
activities.
The
remedial
action
proposed
for
the
surface
water
management
system
as
part
of
the
remediation
of
the
Brisbane
Landfill
includes
restructuring
the
Central
Drainage
Channel
and
installing
a
layered
lined
system
that
includes
a
barrier
membrane
to
ensure
the
Central
Drainage
Channel
and
Brisbane
Lagoon
are
not
impacted
from
leachate
migration
from
the
landfill.
While
the
Draft
EIR
identifies
likely
technologies
that
might
be
employed
in
Title
27
closure
of
the
former
landfill,
because
the
RWQCB
has
the
ultimate
authority
to
determine
the
closure
design
and
technologies
to
be
employed,
the
Draft
EIR
does
not
close
off
alternatives
beyond
“cap
in
place.”
Remediation
of
and
Currently
identified
remedial
actions
are
described
in
the
Draft
EIR
on
pages
4.G-78
through
4.G-86.
The
currently
proposed
remedial
actions
for
include:
(1)
(2)
Excavation
of
28,000
cubic
yards
of
metals-impacted
soils
for
treatment
and
either
offsite
disposal
or
onsite
reuse;
In-situ
bioremediation
of
the
VOC
impacted
groundwater,
a
strategy
consistent
with
the
San
Francisco
portion
of
that
is
not
a
part
of
the
Project,
but
is
the
source
of
groundwater
contamination
underlying
the
Project
Site
portion
of
Natural
attenuation
of
the
impacted
groundwater
screened
between
40
and
100
feet;
Soil
vapor
extraction
and
mitigation
for
vapor
intrusion
mitigation
into
buildings;
Capping
impacted
soils;
and
Land
use
controls.
(3)
(4)
(5)
(6)
Brisbane
Baylands
Final
EIR
2.4-38
May
2015