Res-2022-046 - Laserfiche WebLink

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,'.rIq t ii.r']i'r. 1 - Biofiltration Swales 2 - Vegetated Filter Strips 2 - OilWater Separators (OWS) 3 - Pervious Pavement 4 - Detention Basin wl ' Filter Cartridges Table l: Alternatives Analysis Construct biofiltration swales adjacent to paved roadways tr Connect underdrains and overflow bypass from biofiltration swales to existing storm sewer network tr Construct vegetated filter strips adjacent to paved roadways tr Construct and connect oil water separators to the storm sewer tl Conslruct new pervious pavement EI Demolish existing pavement tr Connect underdrains to existing stormwater sewer system tl Use underground engineered filter systems to provide water quality treatment tr Provides runofftreatment for public right-of-way , tr Provides minimalflow control benefit tr Designs require consideration of cold climate tr lmpacts roadside parking tr Designs can have minimal impact on the landscape with the appearance of open roadside ditches tr Consldered the preferred alternative in areas with storm Sewer tr Providesrunoff treatment for public right-of-way tr Provides minimalflow control benefit tr Design can be used in unsewered areas tr Designs can have minimal impact on the landscape tr lmpacts roadside parking tr Considared the prefened altemative ln unsewered areas tr Low waier quality benefii as traffic usage on roadways does not warrant installation of OWS tr No flow control benefit tr Not considered the preferred alternative. tr Provides runoff treatment and limited flow control tr Unable to infiltrate with poor soils ' E Construction would cause significant disruption to neighborhood tr Not considered lhe preferred alternative. tr Provides runoff treatment and flow control tr Filter cartridges are a large capital cost and large annual maintenance cost tr Scalable treatment provided at existing collection points or central treatment location tr Not considered the preferred alternative. 5