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<br />2 I P age FloGardll Perk Filter System 0 & M Manual <br /> <br />FloGard@ Perk Filter Systems- Radial Media Filtration <br /> <br />Description I Basic Function <br /> <br />The Perk Filter is a stormwater filtration device used to reduce pollutant loading in runoff from urban <br />developments. Impervious surfaces and other urban and suburban landscapes generate a variety of <br />contaminants that can enter stormwater, polluting downstream receiving waters. The Perk Filter captures <br />and retains sediment, oils, metals and other target constituents close to the source and reduces the total <br />discharge load. <br /> <br />The Perk Filter cartridge is manufactured from durable polymeric components with a <br />polymer-coated steel support screen and stainless steel hardware. Its base construction <br />allows use with a wide variety of media chosen to address site-specific pollutants of concern. <br /> <br />Perk Filters may be installed as a retrofit to suitable existing curb inlet, drop inlet, or combination catch <br />basins, as an integral part of a coated steel- or concrete-housed stormwater inlet system for commercial, <br />residential, and industrial developments, or as centralized modular treatment system installed either on- <br />line or off-line. <br /> <br />Prefiltration <br />Systems constructed with a catch basin inlet are equipped with a FloGard@Plus Catch Basin Insert for <br />pre-filtration. This insert captures gross pollutants such as trash, debris, hydrocarbons, and large <br />sediment particles. <br /> <br />Gravity Separation <br />Some Perk Filter systems have an inlet bay wherein the initial stormwater flows are received. This is <br />separated from the main treatment chamber by a baffle wall with weir assembly. Medium size sediment <br />particles are retained in the inlet bay. A drain down assembly to eliminate standing water from the inlet <br />bay area between storm events is included in standard configurations. <br /> <br />Media Filtration <br />Once the stormwater enters the treatment chamber, it will pass through the filtration cartridges containing <br />the project-specified filter media as the water level rises in the chamber. Very fine pollutant particulates <br />will be retained in the filter cartridges as the water flows through the media to an interior perforated pipe, <br />dropping the treated stormwater into an outlet chamber below a false floor. <br /> <br />Peak Flow Bypass <br />Perk Filter systems are designed with a peak flow bypass to ensure the system will not back up and <br />cause upstream flooding during extraordinary storm events. The bypass weir is an integral part of the <br />baffle wall assembly in the inlet bay and allows peak flow stormwater directly to the outlet chamber. <br /> <br /> <br />KriStar Enterprises, Inc. <br />360 Sutton Place <br />Santa Rosa, CA 95407 <br />(800) 579-8819 <br />www.kristar.com <br />