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A. %11/7'CA11J Important: Inspection should be performed by a person who is <br /> 11 M The„�:7 ° familiar with the StormFilter treatment unit. <br /> CONSTRUC ION PRODUCTS INC. StormFilter 1. If applicable,set up safety equipment to protect and notify <br /> surrounding vehicle and pedestrian traffic. <br /> StormFilter Maintenance Guidelines 2.Visually inspect the external condition of the unit and take notes <br /> Maintenance requirements and frequency are dependent on the concerning defects/problems. <br /> pollutant load characteristics of each site,and may be required in 3.Open the access portals to the vault and allow the system vent. <br /> the event of a chemical spill or due to excessive sediment loading. 4.Without entering the vault,visually inspect the inside of the unit, <br /> Maintenance Procedures and note accumulations of liquids and solids. <br /> Although there are other effective maintenance options,CONTECH 5. Be sure to record the level of sediment build-up on the floor of <br /> recommends the following two step procedure: the vault, in the forebay,and on top of the cartridges. If flow <br /> is occurring, note the flow of water per drainage pipe. Record <br /> 1. Inspection: Determine the need for maintenance. all observations. Digital pictures are valuable for historical <br /> 2. Maintenance: Cartridge replacement and sediment removal. documentation. <br /> Inspection and Maintenance Activity Timing 6.Close and fasten the access portals. <br /> At least one scheduled inspection activity should take place per year 7. Remove safety equipment. <br /> with maintenance following as warranted. 8. If appropriate, make notes about the local drainage area relative <br /> First, inspection should be done before the winter season. During to ongoing construction,erosion problems, or high loading of <br /> which,the need for maintenance should be determined and, if other materials to the system. <br /> disposal during maintenance will be required,samples of the 9. Discuss conditions that suggest maintenance and make decision <br /> accumulated sediments and media should be obtained. as to weather or not maintenance is needed. <br /> Second, if warranted, maintenance should be performed during Maintenance Decision Tree <br /> periods of dry weather. The need for maintenance is typically based on results of the inspection. <br /> In addition,you should check the condition of the StormFilter unit Use the following as a general guide. (Other factors,such as regulatory <br /> after major storms for potential damage caused by high flows and requirements,may need to be considered) <br /> for high sediment accumulation. It may be necessary to adjust the 1.Sediment loading on the vault floor. If>4" of accumulated <br /> inspection/maintenance activity schedule depending on the actual sediment,then go to maintenance. <br /> operating conditions encountered by the system. 2.Sediment loading on top of the cartridge. If>1/4"of <br /> Generally, inspection activities can be conducted at any time,and accumulation, then go to maintenance. <br /> maintenance should occur when flows into the system are unlikely. 3.Submerged cartridges. If>4"of static water in the cartridge <br /> Maintenance Activity Frequency bay for more that 24 hrs after end of rain event,then go to <br /> Maintenance is performed on an as needed basis, based on maintenance. <br /> inspection. Average maintenance lifecycle is 1-3 years. The primary 4. Plugged media. If pore space between media granules is absent, <br /> factor controlling timing of maintenance of the StormFilter is then go to maintenance. <br /> sediment loading. Until appropriate timeline is determined, use the 5. Bypass condition. If inspection is conducted during an average <br /> following: rain fall event and StormFilter remains in bypass condition <br /> Inspection: (water over the internal outlet baffle wall or submerged <br /> One time per year cartridges),then go to maintenance. <br /> After major storms 6. Hazardous material release. If hazardous material release <br /> (automotive fluids or other)is reported,then go to <br /> Maintenance: maintenance. <br /> As needed 7. Pronounced scum line. If pronounced scum line(say>_ 1/4" <br /> Per regulatory requirement thick)is present above top cap,then go to maintenance. <br /> In the event of a chemical spill 8.Calendar Lifecycle. If system has not been maintained for 3 <br /> Inspection Procedures years,then go to maintenance. <br /> Assumptions: <br /> It is desirable to inspect during a storm to observe the relative <br /> flow through the filter cartridges. If the submerged cartridges are No rainfall for 24 hours or more. <br /> severely plugged,then typically large amounts of sediments will be No upstream detention (at least not draining into StormFilter). <br /> present and very little flow will be discharged from the drainage Structure is online. Outlet pipe is clear of obstruction. Construction <br /> pipes. If this is the case,then maintenance is warranted and the bypass is plugged. <br /> cartridges need to be replaced. <br /> Maintenance <br /> Warning: In the case of a spill,the worker should abort inspection <br /> activities until the proper guidance is obtained. Notify the Depending on the configuration of the particular system,workers <br /> local hazard control agency and CONTECH immediately. will be required to enter the vault to perform the maintenance. <br /> To conduct an inspection: <br /> 1 <br />