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' ' � � - ! <br /> bescription <br /> The Stormwater Manaoemeni StormFilterC�(StormFiler) is a passive, Flow-tnrouoh, stormwater <br /> nliration s��stem that is installeo inline wRh storm drains. The system is compris=d of one or more <br /> vaults thai house rechargeable, media-filled, filter cartridges. The StormFilier works by passing <br /> stormwaier throuph the media-fiiled cartridges, which tra <br /> dissolved metals and hydrocarbons. Once filiered through he med ae t�het eated s ormwatler Is°h as <br /> dire�ted lo a colleciion pipe or discharged into an open channel drainage way. <br /> The S1ormFilter is ofrered in four differenl configurations: cast in-pla�e, precest, linear, and catch <br /> basin. The precast, linear, and catch basin models ufifize pre-manufactured units to e2se the <br /> and installation pmcesses. The cast-in-place unfts are customized for lar � <br /> cove2d or uncovered underground units. design <br /> g..r flows and may be either <br /> Purpose <br /> The Storm�ilter is a passive, flow-through, stormwater filtrafion system designed to improve the <br /> quality of stortnwaler runoff from the urban environmenl before if enters receiving walerwa��s. It is <br /> intended to funcfiion as a Best Management Pracfice(BIv1F) Io meet federal, stafe, and local <br /> requirements for treating runoff in comptiance with the Clean Water Aci. <br /> Th�ugh independenf third party studies, H h2s been demonstrated ihat the SiormFilter is highly <br /> efiective ior treatment of nrsf flush flows and for treatmenf of flow-paced iirnn�s during the latter � <br /> a storm, In aeneral, the SlormFilter's eftrciency is highest when pollutant concentrations are highest. <br /> The primary non-point sour�e pollutanis targeted for removal by the StormFilier are: sediment pa„ o� <br /> (TSS), oil ano grease, soluble metals, nuirients, organics, and tr2sh and debris. <br /> Si_>ing . <br /> 1�he StormFiRer ic s¢ed to treai ihe peal; Flow of a water quality design storm. The peaF: fioH� is <br /> determinzd fmm calculations 6ased on the contributing vu�a�ershed liydrolony and from a desi <br /> magnitude sei b��the local stormwater managemenl ag��c��. The particuiar size of a SlormFilier unif <br /> k d>iermined by ihe number of filter cartridges jsee Fgure 1) required lo heat�hk q 9n storm <br /> i he flow rate through each filler cariddge is zdjustable, allowing control over the an ou rt ot contact <br /> iime batween the inilueni and the Biter media. The maximum flow rate through each cartrid � <br /> adjusted to b=twe�n 5 and 15 gpm using a calibrated restricfor disc af the base of each filie�ca <br /> Adjustmsnts to Ihe carin�ge flow rate will affec( the numhe 9- can be <br /> fiow. r of cariridqes re uired to treat th.. rt���9e' <br /> q ' peak <br /> zesic Funciian <br /> Tlie Storm�iiter is desiqned to siplion stormwaler runofi ihrough a fiBer cartridge containing media. q <br /> variet�� oi filter media is avai;able and can be cuslomeed for each site to target and remove Ihe <br /> desired 1=vels of seoiments, dissolved phosphorus, dissolvec metals, organics, and nil ano grease. In <br /> many cases, e cumbination of inedia is recommended to meximize the efrsctiveness nf the <br /> siomiv,•a(e;pollutant removal. <br /> / � , <br />