Patent ID: 6200484
Filing Date: 2001-03-13
Classification: C02F,E03F,Y10S

Abstract:
A surface water run-off filtration apparatus for use with an in-ground, preexisting catch basin connected through a sewer outflow to a sewer system, comprising:an insert body sized to fit into said pre-existing catch basin, said insert body having an upper peripheral edge defining a shoulder and an outflow pipe positioned for fluid connection with said sewer outflow;a removable plate on said shoulder to define a catch basin interior beneath said plate, said plate having an opening therethrough;a removable grate on said shoulder and defining a primary water filter;a perforate screen extending through said opening through said plate and into said catch basin interior, said perforate screen having plural openings defining a secondary water filter;a tertiary water filter between said secondary filter and said outflow pipe, said tertiary filter comprising filter media selected for filtering contaminants passing through said primary and said secondary water filters, and further comprising selected synthetic fibrous media sandwiched between opposed perforate plates and positioned such that water flowing into said outflow passes through said tertiary water filter.