Patent ID: 7150582

Claim:
An underground storage system comprising: an underground storage tank; a riser connected to the underground storage tank, the riser having a top and a side wall; a form having a lower portion and an upper portion, the form being positioned such that the lower portion surrounds a portion of the riser side wall; and a street box, the street box having a lower portion and an upper portion, the lower portion of the street box being sized and positioned such that it is in a closely spaced relationship with the upper portion of the form, the upper portion of the street box having a shoulder for accepting a street box cover; and a street box cover positioned on the shoulder, wherein the riser is configured to act as a containment sump and at least a portion of the side wall of the riser is a double walled portion comprising a first wall spaced apart from a second wall by an annular space, and a bottom of the lower portion of the form extends to a depth below a top of the double walled portion of the riser.