2102 ROSS AVE 2025-07-28 - Laserfiche WebLink

I Sediment removal and cartridge replacement on an as needed 7. Remove safety equipment. I basis is recommended unless site conditions warrant. 8. If appropriate, make notes about the local drainage area Once an understanding of site characteristics has been relative to ongoing construction, erosion problems, or high established, maintenance may not be needed for one to three loading of other materials to the system. ' years, but inspection is warranted and recommended annually. 9.Discuss conditions that suggest maintenance and make decision as to weather or not maintenance is needed. Inspection Procedures Maintenance Decision Tree ' The primary goal of an inspection is to assess the condition of The need for maintenance is typically based on results of the the cartridges relative to the level of visual sediment loading as inspection. The following Maintenance Decision Tree should be used as it relates to decreased treatment capacity. It may be desirable to a general guide. (Other factors,such as Regulatory Requirements,may conduct this inspection during a storm to observe the relative need to be considered) ' flow through the filter cartridges. If the submerged cartridges are severely plugged,then typically large amounts of sediments "" liF i will be present and very little flow will be discharged from the i ' . „? 1..._ ,, N ,;'- I drainage pipes. If this is the case,then maintenance is warranted „ and the cartridges need to be replaced. . Warning: In the case of a spill, the worker should abort - ' inspection activities until the proper guidance is obtained. Notify the local hazard control agency and CONTECH I Construction Products immediately. To conduct an inspection: : ' Important: Inspection should be performed by a person who is familiar with the operation and configuration of the Ilitt, - ,4#' I Storm Filter treatment unit. 1.If applicable, set up safety equipment to protect and notify , surrounding vehicle and pedestrian traffic. ' 2.Visually inspect the external condition of the unit and take notes concerning defects/problems. 1.Sediment loading on the vault floor. a. If>4"of accumulated sediment, maintenance is required. ,+�, r a,. t r . 2.Sediment loading on top of the cartridge. f �' a. If>1/4"of accumulation, maintenance is required. t 4 I ''" .cC 4r rr- 3.Submerged cartridges. � t 7 . l: a. If>4"of static water in the cartridge bay for more _ that 24 hours after end of rain event, maintenance is y ' ,4nt she a� , required. 4. Plugged media. a. If pore space between media granules is absent, - t maintenance is required. 5.Bypass condition. a. If inspection is conducted during an average rain fall I •. event and StormFilter remains in bypass condition (water over the internal outlet baffle wall or submerged w; i cartridges), maintenance is required. .r" I 3.Open the access portals to the vault and allow the system vent. 6.Hazardous material release. 4.Without entering the vault,visually inspect the inside of the a. If hazardous material release(automotive fluids or other) unit,and note accumulations of liquids and solids. is reported, maintenance is required. 1 5.Be sure to record the level of sediment build-up on the floor of 7. Pronounced scum line. the vault, in the forebay,and on top of the cartridges. If flow a. If pronounced scum line(say>_ 1/4"thick) is present is occurring, note the flow of water per drainage pipe. Record above top cap, maintenance is required. I all observations. Digital pictures are valuable for historical documentation. 8.Calendar Lifecycle. 6.Close and fasten the access portals. a. If system has not been maintained for 3 years maintenance is required. 1 3