Stormwater filtering device for catch basins

Abstract

A novel removable catch basin filter assembly configured to fit within a catch basin of the type that collects stormwater runoff is disclosed herein. The removable catch basin filter assembly comprises an outer support frame sized to fit on the upper perimeter recessed ledge of the catch basin and underneath the grate, and a filtering system detachably connected to a selectively sized outer support frame. The filtering system comprises a lower filter bag made of a water permeable material (e.g., a geotextile) capable of filtering one or more contaminates contained within stormwater runoff, four receiving tabs positioned at or near the four corners of the inner perimeter edge of the upper perimeter flange of the filtering system, wherein the four receiving tabs are configured to detachably receive the four corners of the outer support frame.

What is claimed is: 
     
         1 . A removable catch basin filter assembly configured to fit within a rectangular or square shaped catch basin of the type that collects stormwater runoff, the catch basin having an upper perimeter recessed ledge sized to receive and support a grate, comprising:
 a rectangular or square shaped outer support frame sized to fit on the upper perimeter recessed ledge of the catch basin and underneath the grate;   a flexible material that defines a flanged bowl detachably connected to the outer support frame, the flexible material comprising an upper perimeter flange attached to a lower filter bag and defining an inner perimeter edge having four corners, the upper perimeter flange being attached to the lower filter bag along the inner perimeter edge to thereby define the flanged bowl, the lower filter bag being sized and configured to fit within the catch basin, the lower filter bag being made of a water permeable material capable of filtering one or more contaminates contained within stormwater runoff that collects within and permeates through the lower filter bag;   at least four receiving tabs positioned at or near the four corners of the inner perimeter edge of the upper perimeter flange, the at least four receiving tabs being configured to detachably receive the four corners of the outer support frame; and   one or more lifting straps attached at or near the four receiving tabs.   
     
     
         2 . The removable catch basin filter assembly of  claim 1  wherein the lifting straps crisscross each other. 
     
     
         3 . The removable catch basin filter assembly of  claim 1  wherein the water permeable material is a fabric. 
     
     
         4 . The removable catch basin filter assembly of  claim 1 , further comprising a filtering media contained within the lower filter bag for filtering oils, metals, or both from stormwater. 
     
     
         5 . The removable catch basin filter assembly of  claim 4  wherein the filtering media is an ion exchange resin. 
     
     
         6 . The removable catch basin filter assembly of  claim 1  wherein the rectangular or square shaped outer support frame is in the form of first and second pieces of metal wire fastened together. 
     
     
         7 . The removable catch basin filter assembly of  claim 1 , further comprising one or more spillways located one a sidewall of the lower filter bag. 
     
     
         8 . A removable catch basin filter assembly configured to fit within a catch basin of the type that collects stormwater runoff, the catch basin having a catch basin opening surrounded by an upper perimeter recessed ledge sized to receive and support a grate, comprising:
 a support means for supporting a lower filter bag within the catch basin, the support means being sized to fit on the upper perimeter recessed ledge of the catch basin and underneath the grate;   a filtering system means detachably connected to the support means, the filtering system means comprising an upper perimeter flange attached to a lower filter bag, the upper perimeter flange defining an inner bag opening and an inner perimeter edge, the upper perimeter flange being attached to the lower filter bag along the inner perimeter edge to thereby define the inner bag opening, the lower filter bag being sized and configured to fit within the catch basin, the lower filter bag being made of a water permeable material capable of filtering one or more contaminates contained within stormwater runoff that collects within and permeates through the lower filter bag;   a receiving means positioned at or near the inner perimeter edge of the upper perimeter flange, the receiving means being configured to detachably receive the support means; and   a means for lifting the removable catch basin filter assembly into and out of the catch basin.