2.
Response
to
Comments
2.9
Individual
Responses
to
Comments
from
Organizations
including
the
potential
reason
for
gradient
anomalies
based
on
data
reviewed.
Current
soils
processing
and
recycling
operations
on
the
landfill
will
not
impact
the
historic
groundwater
gradients
summarized
in
this
section.
Furthermore,
the
existing
operations
on
the
landfill
will
cease
with
Title
27
landfill
closure
and
proposed
Project
site
development.
The
information
presented
on
Draft
EIR
page
4.G-30
is
provided
as
part
of
the
existing
setting,
and
does
not
refer
to
impacts
of
proposed
Project
site
development.
The
discussion
of
Project
site
development-related
impacts
starts
on
Draft
EIR
page
4.G-86.
Mitigation
Measures
4.G-2a
through
4.G-2d
address
the
issues
raised
in
this
comment.
The
list
referenced
in
this
comment
is
a
list
of
analytes
for
which
the
leachate
and
groundwater
samples
were
submitted
in
2010.
The
Draft
EIR
states
that
groundwater
has
been
impacted
by
a
number
of
constituents.
Neither
the
list
of
analytes
nor
the
constituents
detected
in
groundwater
are
limited.
The
Draft
EIR
accurately
reflects
the
results
of
studies
conducted
within
the
Baylands,
including
2010
leachate
monitoring
results,
which
indicated
the
presence
of
VOCs,
trace
concentrations
of
SVOCs,
and
metals
(barium
and
nickel),
indicting
a
slight
leachate
buildup.
The
information
presented
for
the
2010
baseline
year
is
from
the
Geosyntec
Consultants
report
entitled,
Semiannual
Discharge
Monitoring
Report,
Brisbane
Landfill,
Brisbane,
CA
,
October
30,
2010,
which
is
on
file
with
the
City
of
Brisbane
Community
Development
Department.
See
13
for
discussion
regarding
the
remediation
review
and
approval
process
and
for
discussion
regarding
the
adequacy
of
existing
studies
for
use
in
the
Draft
EIR.
The
third
paragraph
on
Draft
EIR
page
4.G-31
has
been
revised
to
read
as
follows:
A
leachate
seep
collection
and
transmission
system
(LSCTS)
was
installed
by
the
landowner
as
part
of
a
leachate
management
system
to
meet
the
interim
objective
required
by
the
Regional
Water
Quality
Control
Board.
The
system
is
located
at
the
southern
end
of
the
Brisbane
Landfill,
intercepting
leachate
and
conveying
it
to
the
Bayshore
Sanitary
District
sewer
line.
Results
from
the
summer
2010
monitoring
event
indicated
that
no
leachate
seeps
were
observed;
therefore,
the
leachate
seep
collection
and
transmission
system
is
operating
as
designed,
and
no
exposure
to
human
or
environmental
receptors
is
occurring
(Geosyntec,
2010).
Table
4.G-2
presents
the
maximum
reported
concentrations
of
chemical
compounds
in
the
leachate
wells.
Those
chemical
compounds
not
included
in
this
table
were
not
detected
above
the
laboratory
reporting
limits.
The
Maximum
Contaminant
Level
for
California
Brisbane
Baylands
Final
EIR
2.9.1-44
May
2015