1102 SHUKSAN WAY B E AEROSPACE 2018-01-01 MF Import

i � � A properly (unctioning system will remove The recommended initial frequency for � solids from water by trapping particulates in inspection/minor maintenance is two times ' the porous structure of the filter media. The per year for precast units. StormFilter units flow throuoh the system �vill naturally shou{d be inspected after all major storms. decrease as more and mor� soiids are Sediment removal and cartridge trapped. Eventually the flow through the replacement on an annual basis is system will be low enough to require recommended until further knowledge is replacement of the cartridges. It may be gained about a particular system. I possible to extend ihe usable span of the cartridgcs by removing sed;menl irom Once an understanding of site i.pstream trapping devices on an as-needed characteristics has been established, I basis in order to prevent material from being maintenance may not be needed for one to re-suspended and discharged to the two years, but inspection is warranted. system. I Maintenance Methods Site conditions greaUy influence maintenance requiremenls. StormFilter InspectionlMinor Maintenance units bcaled in areas wilh erosion or active ' construction should be inspected and The primary goal of a maintenance maintained more oflen than those in fully inspection is to assess the condition of the stabilized areas. cartridges relative to the level of sediment I Ic�ding. It may be desirable to conduct this The n�aintenance frequency may be inspection during a storm to observe the adjusted as addilional monitoring relative flow through the filter cartridges. If informalion becomes available during (he the submerged carlridges are severely Iinspection program. Areas that develop plugged, large amounts of sediments will be known problems shouid be inspected more presenl and very little flow will be frequently than areas that demonstrate no discharged from the drainage pipes. I( this problems, particularly aiter large siorms. is the case, it is likely that the cartridges �eed to be replaced. Ultimately, inspection and maintenance activities should be scheduled based on the Waming: In the case of a spill, the worker hisloric records and characteristics of an should abert maintenance activities until ihe individual StormFilter system. It is proper guidance is obtained. Notify the recommended that the maintenance agency local hazard control agency and CONTECH develop a database to properly manage Stormwater Solutions immediately. StormFilter maintenance programs. , Prior to the deveiopment o( the To conduct an inspection and/or minor maintenance dat:'iase, the �ollowing maintenance: mainienance irequencies should be Important: Maintenance must be performed lollo�ved: by a utility worker familiar with StormFilter Inspection/minor maintenance units. • One time per year • After Major Storms 1. I(applicable, set up safety equipment to protect pedestrians from fall hazards Major maintenance due to open vault doors or when work is • One time per year being done near walkways or roadways. • In the event of a cliemical spill Z. Visually inspect thP external condition of the unit and take notes concerning Frequencies should be updated as required. defects/problems. � 1 �� E�200G COIJTECH Slormwaler Solulions Toll-frea:800.548 4667 4 o�g wnlechslv m�valer mm VauiL QP and Lincor SlortnFllter Operelron ana IABlnlenance GuiOellna5