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� <br /> c <br /> � <br /> � <br /> � A properly functioning system will remove The recommended initial frequency ior <br /> � solids from water by trapping particulates in inspection/minor maintenance is two times <br /> the porous structure of the filter media. The per year for precast units. StormFilter units <br /> � flow through the system will naturally should be inspected afler all major storms. <br /> decrease as more and more solids are Sediment removal and cartridge <br /> trapped. Eventually the (low through the replacement on an annual basis is <br /> system will be low enough to require recommended until further knowledge is <br /> replacement of the cartridges. It may be gained about a particular system. <br /> possible to extend the usable span of lhe <br /> ' cartridges by removing sediment from Once an understanding of site <br /> i upstream trapping devices on an as-needed characteristics has been established, <br /> 1 basis in order to prevent material from being maintenance may not be needed for one to <br /> re-suspended and discharged to the two years, but inspection is warranted. <br /> i system. <br /> Maintenance Methods <br /> ' Site conditions greatly intluence <br /> � maintenance requirements. SlormPiller Inspection/Minor Maintena�ce <br /> units located in areas with erosion or aclive <br /> construction should be inspected and The primary goal of a maintenance <br /> maintained more often than lhose in fully inspection is to assess the condilion of the <br /> , stabilized areas. cartridges relative to the level of sediment <br /> loading. It may be desirable to conduct this <br /> i The maintenance (requency may be inspection during a storm to observe the <br /> � adjusted as additional monitoring relative flow through the filter cartridges. If <br /> information becomes available during the the submerged cartridges are severely <br /> � inspection program. Areas that develop p�ugged, large amounts of sediments wiil be <br /> � known problems should be inspecled more present and very little flow will be <br /> frequently than areas that demonstrate no discharged from the drainage pipes. If this <br /> � problems, particularly after large storms. is the case, it is likely that the cartridges <br /> � need to be replaced. <br /> Ullimately, inspection and maintenance <br /> � activilies should be scheduled based on lhe yyarning: In the case of a spill, the worker <br /> � historic records and characteristics of an should abort maintenance activities until the <br /> individual StormFiller system. It is proper o��idance is oblained. Nolify lhe <br /> ' recommended lhat lhe maintenance agency local hazard control agency and CONTECH <br /> ; develop a database lo properly manage Stormwater Solutions immediately. <br /> StormFilter maintenance programs. <br /> Prior to the development of the To conriuct an inspection and/or minor <br /> maintenance database, the following maintenance: <br /> maintenance frer�uencies should be �mportant: Maintenance must be pertormed <br /> followed: by a utility worker familiar with StormFilter <br /> Inspection/minor maintenance units. <br /> • One time per year <br /> • After Major Slorms 1. If applicable, set up safety equipment to <br /> protect pedestrians from fall hazards <br /> Major maintenance due to open vault doors or when wor� is <br /> • One time per year being done near walkways or roadways. <br /> • In the event of a chemicai spill 2. Visually inspect the external condition of <br /> lhe unit and take notes concerning <br /> Frequencies should be updated as required. dAfects/problems. <br /> ( ,��2006 CONTECH Starm�vafer Sotutions Toll-free:800.5-08.4G67 4 of p <br /> ccnicdictormv:nter.com Va�dL CIP anA Linenr SlortnFil:or Operallon nnA tdaintonnnco Guidel�nes' <br /> � <br />