2.
Response
to
Comments
2.9
Individual
Responses
to
Comments
from
Organizations
waste,
construction
rubble,
tires
and
sewage.
It
is
a
common
term
used
in
the
construction
industry
to
denote
soils
that
are
free
of
rubble
and
construction
debris.
As
stated
in
the
Draft
EIR
on
page
4.G-20,
soil
and
groundwater
investigations
have
occurred
throughout
the
Baylands
site
dating
back
to
1987.
Extensive
site-specific
data
has
been
collected
throughout
the
site
in
order
to
understand
how
site
contamination
moves
through
soil
and
groundwater.
The
work
has
been
performed
by
multiple
consulting
firms
and
overseen
by
state
licensed
hydrogeologists
and
geologists.
All
of
these
investigations,
modeling,
and
remediation
treatment
system
designs
have
been
subject
to
professional
peer
reviews
and
agency
oversight
from
the
Regional
Water
Quality
Control
Board
or
the
Department
of
Toxic
Substance
Control.
The
Draft
EIR
relied
upon
the
most
specific
and
comprehensive
data
available
for
the
Baylands
Project
Site
(which
overlies
the
Brisbane
Landfill
and
Southern
Pacific
Railyard
and
but
does
not
include
the
Schlage
Lock
Operating
Unit).
Regarding
the
reference
to
a
report
on
the
Schlage
site,
which
is
outside
of
the
Baylands
Project
Site
boundary,
as
stated
on
page
4.E-14
of
the
Draft
EIR,
groundwater
flows
can
be
highly
variable.
As
the
ongoing
monitoring
and
remediation
activities
continue,
there
may
be
further
refinements
in
the
understanding
of
groundwater
flow,
but
for
the
purposes
of
understanding
the
underlying
geology,
all
development
would
be
required
to
adhere
to
site
specific
geotechnical
investigations
(as
stated
in
Draft
EIR
Mitigation
Measure
4.E-2a:
“Prior
to
the
issuance
of
a
grading
permit,
applicants
for
all
site
-specific
development
and
infrastructure
projects
within
the
Project
Site,
including
structures,
utilities,
and
roadways
shall
submit
to
the
City
Engineer
a
final
design-level
geotechnical
report
prepared
by
a
licensed
geotechnical
or
soil
engineer
experienced
in
construction
methods
on
fill
materials
in
an
active
seismic
area.
The
report
shall
provide
site-specific
construction
methods
and
recommendations
regarding
grading
activities,
fill
placement,
soil
corrosivity/expansion/erosion
potential,
compaction,
foundation
construction,
drainage
control
(both
surface
and
subsurface),
and
avoidance
of
settlement,
liquefaction,
differential
settlement,
and
seismic
hazards
in
accordance
with
current
California
Building
Code
requirements
including
Chapter
16,
Section
1613.”)
See
for
a
discussion
of
construction
activities
and
groundwater
cross-contamination.
A
“well
-
defined”
aquifer
is
defined
as
an
aquifer
between
two
distinct
layers
of
earth
that
“confine”
the
aquife
r
of
interest.
Such
an
aquifer
would
be
readily
visible
in
a
cross
section
obtained
from
multiple
boring
logs.
The
statement
there
are
no
well-defined
aquifers
underlying
the
site
indicates
the
lack
of
confining
layers
separating
distinct
water-bearing
units,
and
does
not
imply
there
is
no
aquifer
present.
This
is
not
surprising,
as
the
Brisbane
Baylands
Final
EIR
2.9.1-21
May
2015