2.
Response
to
Comment
2.4
Master
Responses
to
Comments
Site-specific
development
plans
and
development
within
the
Baylands
.
Remedial
actions
required
for
the
former
Brisbane
Landfill,
and
must
be
completed
prior
to
grading
and
site
development
as
follows:
Remedial
actions
required
for
the
former
Brisbane
Landfill
must
be
completed
prior
to
grading
or
development
within
the
area
of
the
former
landfill.
If
the
RWQCB
and
the
San
Mateo
County
Environmental
Health
Division
determine
that
phased
closure
and
remediation
of
the
former
landfill
would
be
protective
of
workers
and
the
public
and
permit
phased
closure
and
remediation,
phased
grading
and
development
of
the
former
landfill
may
be
permitted
subsequent
on
areas
where
closure
and
remediation
has
been
completed
to
the
satisfaction
of
the
RWQCB
and
the
San
Mateo
County
Environmental
Health
Division.
Remedial
actions
within
must
be
completed
to
the
satisfaction
of
DTSC
prior
to
initiation
of
any
grading
or
development
within
Remedial
actions
within
must
be
completed
to
the
satisfaction
of
the
RWQCB
prior
to
initiation
of
any
grading
or
development
within
2.4.14
Master
Response
14,
Hazards
and
Hazardous
Materials:
Risk-Based
Remediation
Standards
Comments
A
number
of
comments
indicated
a
misunderstanding
of
risk-based
remediation
standards
and
the
use
of
human
health
risk
assessments
by
the
RWQCB
and
DTSC
to
set
those
standards
for
and
Response
Rather
than
applying
a
single
standard
for
each
potential
contaminant
to
all
sites
regardless
of
their
intended
use,
risk-based
cleanup
goals
are
site-specific
cleanup
standards
based
on
site-
specific
information
including
the
types
and
concentrations
of
the
contamination
present,
the
future
intended
use
of
the
property
(and
resulting
human
health
risks
based
on
this
use),
the
expected
receptor
populations
that
may
be
exposed
to
the
impacted
media
during
project
construction
and
operation,
and
the
anticipated
potential
ingestion
pathways.
For
example,
if
the
intended
future
use
of
a
property
is
commercial
office,
risk
based
cleanup
goals
would
be
calculated
for
construction
workers,
commercial
office
workers,
and
landscape/maintenance
workers.
Construction
workers
would
have
an
acute
exposure,
i.e.,
they
potentially
are
exposed
to
the
impacted
media
for
a
short
period
of
time,
during
the
construction
of
the
project.
Commercial
office
workers
and
landscape
maintenance
workers
would
have
a
chronic
exposure,
i.e.,
they
potentially
are
exposed
to
the
impacted
media
for
a
longer
time,
while
they
work
in
the
office
building
or
on
the
grounds
of
the
project
after
development
is
completed.
If
the
intended
future
use
of
a
property
is
residential,
risk
based
cleanup
goals
would
be
calculated
for
construction
workers
and
residents.
Construction
workers
would
have
an
acute
potential
exposure,
while
residents
would
have
a
chronic
potential
exposure.
Because
the
range
of
potential
ingestion
pathways
and
the
time
over
which
exposure
to
contaminants
is
greater
for
Brisbane
Baylands
Final
EIR
2.4-42
May
2015