Patent ID: 8608956

Claim:
A filtration apparatus for a run-off vault having a vault interior defined by opposed interior walls, and a manhole opening into the vault interior, the improvement comprising: a generally planar support plate that defines a surface onto which run-off flows when said run-off enters said run-off vault, said support plate having an opening therethrough and a linear edge that defines a support plate width having a first dimension and a non-linear edge that defines a support plate depth having a second dimension, where the first dimension is greater than the second dimension; at least one leadscrew attached to the support plate, the leadscrew comprising a rod adjustably attached to the support plate so that the rod may be selectively extended from and retracted relative to said support plate, a filter in fluid communication with the opening; wherein said manhole opening defines a third dimension that is greater than the second dimension but less that the first dimension and wherein the support plate and the at least one leadscrew are inserted into the vault interior through the manhole opening and said support plate is supported in a substantially horizontal orientation in said vault interior only with the at least one leadscrew.