The
source
of
the
one-mile
by
10-mile
sheen
between
Shell's
Mars
and
Ursa
projects
is
unknown
and
not
linked
to
the
facilities,
but
Shell
is
responding
"proactively,"
Reuters
quoted
a
statement
from
the
Anglo-Dutch
supermajor
as
saying.
An
on-call,
after-hours
spokesman
for
the
Coast
Guard
told
Reuters
he
had
no
information
about
the
incident.
Shell
said
it
reported
the
sheen
to
the
National
Response
Center,
which
is
run
by
the
Coast
Guard
and
keeps
up
with
marine
oil
spills,
pipeline
leaks
and
other
incidents
of
pollution.
The
sheen
report
did
not
immediately
appear…