Patent ID: 8156969
Filing Date: 2012-04-17
Classification: B65D,Y02A

Abstract:
1. An underground storage tank system apparatus, the apparatus comprising: a. an underground storage tank for containing a liquid, said underground storage tank having a top side; b. a tank sump attached to said top side of said underground storage tank, said tank sump having a sump perimeter wall, said tank sump being located below a surface of a ground; c. a manhole skirt side wall, said manhole skirt side wall having a manhole skirt side wall interior surface, said manhole skirt side wall defining a manway, said manway communicating between said surface of said ground and said tank sump; d. an annular sediment trap, said annular sediment trap defining a trap outside wall, a trap inside wall, a trap bottom, and a trap open top wherein said trap outside wall, said trap bottom and said trap inside wall together define a trap interior volume, said trap interior volume being water-tight, said trap interior volume being in fluid communication with said manway, said manhole skirt side wall interior surface extending into said trap interior volume, whereby a water entering said manway from said surface of said ground enters said trap interior volume through said trap open top; e. said trap inside wall and said sump perimeter wall being in an spaced-apart relation and together defining an annular space, said annular space having an annular space open top and an annular space interior volume, whereby when said water entering said trap interior volume accumulates and overtops said trap interior wall, said water enters said annular space through said annular space open top.