9212 HOLLY DR 2018-01-02 MF Import

CI I 1 I 1 Maintenance Guidelines The primary purpose of :he StormFilter is to filter out and prevent pollutants from entering our waterways. Like any effective filtration system, periodically these pollutants must be removed to restore the StormFilter to its full efficiency and effectiveness. Maintenance requirements and frequency are dependent on the pollutant load characteristics of each site. Maintenance activities may be required in the event of a chemical spill or due to excessive sediment loading from site erosion or extreme storms. It is also good practice to inspect the system after severe storm events. Types of Maintenance Presently, procedures have been developed for two levelq of maintenance: • Inspection/minor maintenance • Major maintenance. 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 the vault itself • Removal of vegetation and trash and debris. Major maintenance typically includes: • Cartridge replacement • Sediment removal important: Applicable safety (OSHA) and disposal regulations should be followed during all maintenance activities. Two scheduled inspections/maintenance activities should take place during the year. First, an inspection/minor maintenance activity should be done. During the miror maintenance activity (routine inspection, debris removal), the need for majo, maintenance should be determined and, if disposal during major maintenance will 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 StormFilter is sedimentation. Maintenance Activity Timing a _ ®2006 CONTECH Storrintater Solutions Toll -free: 800.548.4667 0 of 9 coniechstormwaleccom Vault CIP and Linear StornnFiter Operation and Maintenance Guidelines