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r <br />r A��i%\Ivmug) <br />-�.►� : rmUNOwl <br />STORMWATER _ Operation and Maintenance <br />SOLUTIONSt <br />I <br />I <br />I <br />I <br />1 <br />r <br />1 <br />1 <br />The Stormwater <br />Management StormFilter® <br />Vault, Cast -In -Place, and Linear Units <br />Important., These guidelines should be used <br />as a part of your site stormwater <br />management plan. <br />Description <br />The Stormwater Management StormFilter® <br />(StormFilter) is a passive, flow -through, <br />stormwater filtration system. The system is <br />comprised of one or more vaults that house <br />rechargeable, media -filled, filter cartridges. <br />The StormFilter works by passing <br />stormwater through the media -filled <br />cartridges, which trap particulates and <br />adsorb materials such as dissolved metals <br />and hydrocarbons. Once filtered through the <br />media, the treated stormwater is directed to <br />a collection pipe or discharged into an open <br />channel drainage way. <br />The StormFilter is offered in multiple <br />configurations, including vault, linear, catch <br />basin, manhole, and cast -in -place. The <br />vault, linear, manhole, and catch basin <br />models utilize pre -manufactured units to <br />ease the design and installation processes. <br />The cast -in -place units are customized for <br />larger flows and may be either covered or <br />uncovered underground units. <br />Purpose <br />The StormFilter is a passive, flow -through, <br />stormwater filtration system designed to <br />improve the quality of stormwater runoff <br />from the urban environment before it enters <br />receiving waterways. It is intended to <br />function as a Best Management Practice <br />(BMP) to meet federal, state, and local <br />requirements for treating runoff in <br />compliance with the Clean Water Act. <br />Through independent third party studies, it <br />has been demonstrated that the StormFilter <br />is highly effective for treatment of first flush <br />flows and for treatment of flow -paced flows <br />during the latter part of a storm. In general, <br />the StormFilters efficiency is highest when <br />pollutant concentrations are highest. The <br />primary non -point source pollutants targeted <br />for removal by the StormFilter are: <br />suspended solids (TSS), oil and grease, <br />soluble metals, nutrients, organics, and <br />trash and debris. <br />Sizing <br />The StormFilter is sized to treat the peak <br />flow of a water quality design storm. The <br />peak flow is determined from calculations <br />based on the contributing watershed <br />hydrology and from a design storm <br />magnitude set by the local stormwater <br />management agency. The particular size of <br />a StormFilter unit is determined by the <br />number of filter cartridges (see Figure 1) <br />required to treat this peak flow. <br />The flow rate through each filter cartridge is <br />adjustable, allowing control over the amount <br />of contact time between the influent and the <br />filter media. The maximum flow rate <br />through each cartridge can be adjusted to <br />between 5 and 15 gpm using a calibrated <br />restrictor disc at the base of each filter <br />cartridge. Adjustments to the cartridge flow <br />rate will affect the number of cartridges <br />required to treat the peak flow. <br />C2006 CONTECH St <br />dmmvater Solutions Toil -free: 800.540.4087 v......,.,e.,.. targ <br />' oontechstommateemm Vault, CIP and Linear StormFilter Operation and Maintenance Guldelmes <br />