31 SE EVERETT MALL WAY 2025-07-25

Maintenance Guidelines Two scheduled inspections/maintenance activities should take place during the year. The primary purpose of the StormFilter is to First, an inspection/minor maintenance filter out and prevent pollutants from activity should be done. During the minor entering our waterways. Like any effective maintenance activity (routine inspection, filtration system, periodically these debris removal), the need for major pollutants must be removed to restore the maintenance should be determined and, if StormFilter to its full efficiency and disposal during major maintenance will be effectiveness. required, samples of the sediments and Maintenance requirements and frequency media should be obtained. are dependent on the pollutant load Second, if required, a major maintenance characteristics of each site. activity (replacement of the filter cartridges and associated sediment removal) should Maintenance activities may be required in be performed. the event of a chemical spill or due to excessive sediment loading from site In addition to these two scheduled activities, erosion or extreme storms. It is also good it is important to check the condition of the practice to inspect the system after severe StormFilter unit after major storms for storm events. damage caused by high flows and for high sediment accumulation that may be caused Types of Maintenance by localized erosion in the drainage area. It may be necessary to adjust the Presently, procedures have been developed maintenance activity schedule depending for two levels of maintenance: on the actual operating conditions • Inspection/minor maintenance encountered by the system. • Major maintenance. In general, minor maintenance activities will occur late in the rainy season, and major Inspection/minor maintenance activities are maintenance will occur in late summer to combined since minor maintenance does early fall when flows into the system are not not require special equipment and typically likely to be present. little or no materials are in need of disposal. Inspection/minor maintenance typically Maintenance Activity Frequency involves: The primary factor controlling timing of maintenance for the StormFilter is • Inspection of the vault itself sedimentation. • 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. Maintenance Activity Timing www.stormwater360.com Toll-free:800.548.4667 3 of 9 ©2005 Stormwater360 Vault,CUP and Linear StormFilter Operation and Maintenance Guidelines