2.
Response
to
Comments
2.9
Individual
Responses
to
Comments
from
Organizations
The
objectives
of
the
remediation
activities
at
and
are
to
reduce
potential
impacts
to
human
health
and
the
environment
due
to
exposure
to
constituents
in
soil,
soil
vapor,
and
groundwater
using
remediation
technologies,
including,
but
not
limited
to,
excavation
and
disposal,
treatment
of
soil
and
disposal
or
treatment
of
soil
and
re-use
on
site,
in-situ
remediation
of
groundwater
using
enhanced
technologies,
pump
and
treat
or
natural
attenuation.
The
remedial
strategy
at
the
former
Brisbane
Landfill
is
different
although
the
objective
is
the
same,
i.e.,
to
reduce
potential
impacts
to
human
health
and
the
environment
due
to
exposure
to
constituents
in
soil,
soil
vapor,
and
groundwater.
Title
27
imposes
additional
restrictions
on
the
remedial
strategies
applicable
to
the
former
landfill.
Landfill
gas
must
continue
to
be
collected
and
removed,
leachate
must
continue
to
be
collected
and
removed,
and
placement
of
low
hydraulic
conductivity
layers
is
required,
in
addition
to
a
final
impermeable
cover.
The
remedial
action
discussed
in
the
Draft
EIR
for
the
surface
water
management
system
as
part
of
the
remediation
of
the
former
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.
Remediating
the
Project
site
will
promote
cleaner
runoff
into
the
Brisbane
Lagoon
and
San
Francisco
Bay.
As
stated
in
the
Draft
EIR
Biological
Resources
section
(page
4.C-48)
and
required
by
Mitigation
Measure
4.C-2c,
a
performance
standard
has
been
established
that
requires
the
total
area
and
overall
functions
and
values
of
jurisdictional
wetlands
or
waters
of
the
U.S.
would
to
be
maintained.
This
performance
standard
applies
to
all
site
development,
and
is
required
to
be
incorporated
into
site
plans
such
that
there
is
no
overall
loss
of
wetlands
as
a
result
of
Project
Site
development.
As
a
result,
impacts
to
wetlands
would
be
less
than
significant.
See
9
for
discussion
of
wetlands
mitigation.
The
West
Nile
virus
is
spread
largely
through
mosquito
bites.
Mosquitoes
can
breed
in
very
small
amounts
of
standing
water.
However,
all
mosquitoes
that
were
trapped
and
tested
in
San
Mateo
County
in
2014
have
tested
negative
for
the
virus.
The
drainage
improvements
evaluated
in
the
Draft
EIR
include
bioswales
and
culverts.
Open
channels
and
bioswales
are
generally
designed
to
allow
for
rapid
infiltration
of
stormwater
runoff
through
the
use
of
highly
permeable
soils
and
materials
in
order
to
reduce
any
offsite
flows
during
high
storm
events.
As
a
Brisbane
Baylands
Final
EIR
2.9.1-97
May
2015