spill container by lining the existing unit additionally the liner can be used to convert a single walled spill container into a double walled spill container application_number US 28414308 A description this invention is best understood by referring initially to existing spill containment manholes in fig1 and fig2 fig1 is a cross section view of a spill containment manhole with a bellows 20 style body a snow plow ring 22 common to most spill containers a base 24 common to most spill containers a drain valve 26 common to most spill containers and a tank riser 28 common to all spill containers fig2 is a cross section view of a spill containment manhole with a metal body in lieu of the bellows 20 style body shown if fig1 the spill containment manhole in fig1 and 2 are connected to a 4 u2033 tank riser 28 extending from the top of the buried fuel tank the surface of a fueling facility is covered with a concrete slab the snow plow ring 22 is mounted more or less flush with the top of the concrete slab attached to the snow plow ring 22 is the rest of the spill container the bellows.