Visit www.stormdrains.com. They manufacture catch basin inserts that are the least labor intensive; for their filter has an effective term of 8-10 months and is extremely hydrophobic.
Stormdrian Solutions manufactures a PolyDak filter that captures particles larger than .04 microns. Visit www.stormdrains.com for additional information.
An economical stormwater treatment technology entails efficiency,low maintenance and low installation costs. Visit www.stormdrains.com to view the Inceptor.