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12!30/20D3 :G:30 <br />Ocscription <br />A257780A09 <br />TFIE MCNAUGHTOW GROUP <br />PAGE �3 <br />The Stormwater Management St�rmFii(erp (StormPiiler) is a passive, Oow-through, stomiwater <br />iillration syslem ihal !s lnstalled (nline wllh slorm drains. The systern is comprised of one o� more <br />vautts Ihat house rechargeable, media-fillod, filler cartridges. The StormFiiter works by passing <br />slorrnwalor lhrough iha rnedia-Fllled cartridges, which trap pariiculates and adsor6 materials such as <br />d(ssolved metals and hydrocarbons. Once fil(ered lhrough ihe media, the treated stormwater is <br />direcled to a coUeclion pipQ or discharged inlo ar open channel drainage way. <br />The SlormFilter is of(ered in four diiferent configuralions: cast-In-place, precast, linear, and catch <br />basin. The precast, linear, and catch basin models utilize pre-manuiactured units to ease lhe design <br />and installation processes. The casl-in-place unils are cuslomfzed tor larger flows and inay he either <br />covered or uncovered underground unils. <br />Purpose <br />Th� SlormFiller is a passive, flow-lhrough, stormwater fiUration syslem designed to improve if�e <br />quality of stormwateP runoff frottt the urban environment before it enlers receivinc� wateiways. It ls <br />Intended to funclion as a Elest Manayement Practice (BMP) to rneet (ederal, stale, and local <br />requiremenls for Uealing runoff fn compliance with the Clean Waler Act. <br />Through independent lhird party studles, it has been demonslrated that the StormFilter Is highly <br />eftective for treatrnent of (irst flush (lows and tor troaL-nent of flow-paced flows during the latter �arl oF <br />a storm. In general, the StormFiller's eificiency is highest when pollutant concenlratfons are highest. <br />The prirnary non-point soorce pollulants targeled for removal by the StormFilter are: sedimenls <br />(TSS), oil and grease, soluble metals, nutrierns, oryanics, and trash and debris. <br />sizing <br />The SlormFiller is sized io treat the peaic Oow of a water quality destyn slorrn. The peak Flow is <br />deferminec; irom calculalions based on ihe contribuling walershc�d hydrology and from a design storm <br />magnitude set by the Iocal stofmwater management ayency. The particular size of a StormFiller unit <br />is determined by ih�� numner of filler carlridges (see f-igure 1) tequired to ireal this peak Ilow. <br />The ilow rate through each filler carlridge is adjustable, allowing control over !he amount of contact <br />time belween Ihe in(luent and lhe filler media. The maximum flow rale through each cartridge can be <br />adjustod to belweon 5 and 15 gpm using a calibrated restric(or ciisc at the t�ase of each filter <br />cartridge. Adjustments to lhe cariridge ilow rate will affect the number of cartridges requlred lo lreat <br />the peal< flow. <br />Dasic Function <br />The StormFiller is desfyneJ lo siphon sturmwater runoff through a filter cartridge conlaininy modia. A <br />variety of flter medla is available and can be customizeG for each site lo target and remove ihe <br />desired levels oF sediments, dissolvrd phosphorus, dissolved melais, organics, and oil and gtease. <br />In many c2scs, a combination o( media is recbmmended to maxlmize lho effec(iveness of the <br />stormwater pollutant removat. <br />T a00.548.q6G7 f UU0.5G1.1271 W www.stormwaterinc.com <br />