7405 HARDESON RD BASE FILE 2016-01-01 MF Import

MAINTENANCE GUIDELINES Maintenance Guidelines The primary ourpose o( the StormFilter is to filter out and prevent pollutants from entering our waterways. Like any efiective filtration syslem, periodically these pollutants must be removed to restore the StormFilter to its fuli efficiency and effectiveness. Maintenance requirements and frequency are dependent on lhe pollutant load characlerislics of each site. Maintenance activilies may be required in the event oi a chemical spill or due to excessive sediment loading irom site erosion or extreme sto�ms. It i� also good practice to inspeci lhe system after severe storm events. Types of Maintenance Presently, procedures have been developed for two levels oi maintenance: • inspectionlminor maintenance • Major mainlenance. Inspection/minor maintenance activities are combined since minor maintenance does not require special equipment and typically little or no materials are in need of disposal. Inspection/minor maintenance typically involves: • Inspection of lhe vault ilself • Removal of vegetation and trash and debris. Major maintenance typically inciudes: • Cartridge replacement • Sediment removal v .� STORMWATER MANAGEMEN.T li.'C. Importan(: Applicable sa(�;ty (OSHA) and disposal regulations should be followed during all maintenance activities. Maintenance Activity Timing Two scheduled inspections/maintenance activities should take place during the year. First, an inspection/minor maintenance activity shouid be done. During the minor maintenance activity (routine inspection, debris removal), the need for major maintenance should be determined and, if disposal during major maintenance wiil be required, samples of the sediments and media should be obtained. Second, if required, a major maintenance activity (replacement of the filter cartridges and associated sediment removal) should be performed. In addition to these two scheduled activities, it is important to check the condition of the StormFilter unit after major storms for damage caused by high flows and for high sediment accumulation that may be caused by localized erosion in the drainage area. It may be necessary to adjust the maintenance activity schedule depending on the actual operating conditions encountered by the system. In general, minor maintenance activities will occur late in the rainy season, and major maintenance will occur in late summer to early fall when flows into the system are not likely to be present. Maintenance Activity Frequency The primary factor controlling timing of maintenance for the SturmFilter is sedimentation. Stormwater Alanagement, Inc. OO 2004 StormFilter Operalion and Maintenance Gulde�ines 3 of 9