2.
Response
to
Comments
2.9
Individual
Responses
to
Comments
from
Organizations
To
ensure
the
landfill
gas
control
system
continues
to
meet
operational
material,
weekly
monitoring
of
the
flare
station,
monthly
monitoring
and
adjustment
of
the
landfill
gas
extraction
wells
and
quarterly
monitoring
of
emissions
are
performed.
Repairs
are
performed
during
monitoring
visits
and
as
needed
and
are
documented
in
monthly
reports.
See
See
13
for
discussion
regarding
the
remediation
review
and
approval
process.
As
discussed
Title
27
closure
of
the
former
Brisbane
Landfill
must
address
the
presence
of
leachate
and
the
requirement
to
prevent
any
increases
in
leachate
that
exceed
any
regulatory
thresholds.
See
for
discussion
regarding
the
remediation
review
and
approval
process.
As
discussed
13,
Title
27
closure
of
the
former
Brisbane
Landfill
must
address
the
presence
of
leachate
and
the
requirement
to
prevent
any
increases
in
leachate
that
exceed
any
regulatory
thresholds.
See
See
See
The
landfill
gas
control
system,
which
monitors
methane
production
from
the
landfill
flare
station,
is
monitored
weekly,
the
landfill
gas
extraction
wells
are
monitored
monthly,
and
the
emissions
components
are
monitored
quarterly.
The
landfill
gas
control
system
is
in
place
to
collect
and
combust
methane
and
other
landfill
gases
and
must
continue
to
operate
pursuant
to
the
Title
27
requirements.
Golder’s
landfill
characterization
study
(2008),
which
is
cited
on
Draft
EIR
page
4.G-32,
indicated
the
rate
of
decomposition
of
organic
material
in
the
landfill
and
subsequent
generation
of
methane
has
decreased
over
time,
as
expected
and
evidenced
in
the
monitoring.
Because
the
greatest
organic
decomposition
typically
occurs
during
the
initial
20-
to
30-year
period
after
solid
waste
is
deposited
and
the
landfill
ceased
receiving
refuse
in
1967,
decomposition
of
the
organic
fraction
of
the
waste
will
continue
to
occur
over
time,
albeit
with
an
ongoing
decline
in
the
rate
of
production
of
landfill
gas.
Investigations
and
remedial
actions
at
for
the
soil
matrix,
groundwater,
and
soil
vapor
have
been
ongoing
since
1982.
Soil
was
excavated
in
1993
adjacent
to
and
underneath
sludge
traps
of
the
Brisbane
Baylands
Final
EIR
2.9.2-84
May
2015