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Table 1: Altematives Analysis <br />2 - Vegetated Filter <br />Strips <br />2 - Oil Water <br />I Separators (OWS) <br />3 - Pervious <br />Pavement <br />4 - Detention Basin w/ E <br />Filter Gartridges <br />swales adjacent to paved <br />roadways <br />Cl Connect underdrains and <br />overflow bypass from <br />biofiltration swales to <br />existing storm sewer <br />network <br />tr Gonstruct vegetated filter <br />strips adjacent to paved <br />roadways <br />tr Gonstruct and connect oil <br />water separators to the <br />storm sewer <br />tr Construct new pervious <br />pavement <br />tr Connect underdrains to <br />existing stormwater sewer <br />system <br />Use underground <br />engineered filter systems to <br />provide water quality <br />treatment <br />1 - Biofiltration Swales : tr Construct biofiltration tr Provides runofftreatment for public <br />right-of-way <br />tr Provides minimalflow control benefit <br />tr Designs require consideration of cold <br />climate <br />tr lmpacts roadside parking <br />tr Designs can have minimalimpact on <br />the landscape with the appearance of <br />open roadside ditches <br />tr Gonsldered the preferred <br />alternative in areas with storm <br />Sewer <br />tr Provides runoff treatment fbi public <br />right-of-way <br />tr Provides minimalflow control benefit <br />tl Design can be used in unsewered <br />areas <br />tr Designs can have minimal impact on <br />the landscape <br />tr lmpacts roadside parking <br />r E Considered the prefened <br />aftemative ln unsewered areas <br />tr Low watei quality benefit as traffic <br />usage on roadways does notwarrant <br />installation of OWS <br />tr No flow control benelit <br />tr Not considered the prefened <br />alternative. <br />tr Provides runoff treatment and limited <br />flow control <br />tr Demolish existing pavement ; E Unable to infiltrate with poor soils <br />: tr Construction would cause significant <br />disruption to neighborhood <br />tr Not considered the preferred <br />alternative. <br />tr Provides runoff treatment and flow <br />control <br />tr Filter cartridges are a large capital <br />cost and large annual maintenance <br />cost <br />tr Scalable trealment provided at <br />existing collection points or central <br />treatment location <br />tl Not considered the preferred <br />alternative. <br />5 <br />,t )t r,:r, i'ri,,tr,,i,i,l. i.lr r I i lili, if il i i,ij"), l:i"; r t,li"irl.r