6617 ASSOCIATED BLVD BASE FILE 2018-01-02 MF Import

A properly iunctioning system will remove The recommended initial frequency tor solids from water by trapping particulates in inspectionlminor maintenance is two times , the porous structure of the filter media. The per year for precast units. .tormFilter units flow through the system will naturally should be inspected after all major storms. decrease as more and more solids are Sediment removal and cartridge trapped. Eventua�ly the flow through the replacement on an annual basis is system will be low enouyh lo require recommended until further I<nowledgo is repiacement of the caAridges. It may be gained about a particular system. possible to extend the usablo span of tho cartridges by removing sediment from Once an understanding of site ' upstream trapping devices on an as-needed characteristics has been established, basis in order to pre•�ent rrat9rial from beirg maintenance may not be needed for one to re-suspended and discharged to the two years, but inspection is wartanted. system. Maintenance Methods Site condilions greatly influence maintenance requirements. StormFilter InspectionlMinor Maintenance units located in areas with erosion or active construction should be inspected and The primary goal of a maintenance maintained more often than those in fully inspection Is to asses� the conditiun of the stabilized areas. cartridges relative to the level of sediment loading. It may be desirable to conduct this The maintenance frequoncy may be inspection during a storm to observe the adjusted as additional monitoring relative flow through the filter cartridges. If information becomes available during the the submerged caAridges are severely inspection program. Areas that develop plugged, large amounts of sediments will be known problems should be inspected more present and very little flow will be freque�tly ihan areas that demonstrate no discharged from the drainage pipes. If this problems, particularly after large storms. is the cas�, it is likely that the r,aAridges need to be replaced. Ultimately, inspection and maintenance aclivities should be scheduled based on the yyaming: In the case of a spill, the worker historic records and characteristics of an should aboA maintenance activities until the individual StormFilter system. It is proper guidence is obtained. IJotify the recommended that the maintenance agency I local hazard control agency and CONTECH develop a database to properly manage Stormwater Solutions immediately. StormFilter maintenance programs. i i Prior to the development of the To conduct an inspection andlor minor maintenance database, tne followinc� maintenance: maintenance frequencies shoutd be followed: Important: Maintenance must be peAc,nned by a utility w•orker familiar with StormFilter Ins;ection/minor maintenance units. • One time per year • A(ter Major Storms 1. If aoplicable, set up safety equipment to piotect pedestrians from fall hazards Major maintenance due to open vault doors or when work is • One lime per year being done near walkways or roadways. • In the event of a chemical spill 2. Visually inspect the externai condition of the unit and take notes conceming Frequencies should be updated as required. Aefects/problems. . ;oUb CnN1fCH Sto�mwaler Solulions Tou4ree P00 5<8 d667 1 of 9 ..,,.r i r tin+ninalrr�m V'a.i�� G�i'nna I n�ca�Siormi tl�cr O{w�ation en4lAaintendnu�Guracl�nes