Patent ID: 7875174

Claim:
Apparatus for cleaning runoff water comprising: a unitary vault having a floor, side walls, end walls and a dividing wall defining first and second chambers within said vault; an input conduit for supplying runoff water to said first chamber at a first elevation above said vault floor; a discharge conduit spaced above said bottom at said first elevation and having an inlet for receiving water from said vault above said first elevation , a baffle positioned between said input and said discharge conduits, extending across said first chamber, and having a lower edge at a second elevation below said first elevation and a upper edge at a third elevation above said first elevation and above the elevation of said discharge conduit input, such that transfer of floating contaminates on the input side of said baffle to the discharge side is impeded; a low flow conduit positioned at said first elevation and fed by surface water in said first compartment once said water has risen within said compartment to said first elevation, for delivering such water and floating contaminates into said second compartment at a lower elevation; a transfer conduit with a first end in said second chamber, positioned at a fourth elevation below said second elevation, said transfer conduit extending into said discharge conduit at said first elevation wherein as the level of water in said second chamber rises, water from below the surface of the water in said second chamber is transported to said discharge conduit without said floating contaminates and is discharged from said vault.