Attach G- Engineering Report

13.      Feed vacuum nozzle into cartridge bay and start vacuum truck. Remove cartridge hood and place
         nozzle directly onto filter media. Completely remove media from each cartridge and repeat process for
         every cartridge in vault.

14.      Once completed unthread cartridges from vault floor and place hood back on cartridges

15.      Using the appropriate lifting cap, attach the cable and remove the cartridge (up to 10kgs. each) from
         the vault. Personnel standing under suspended cartridges is strictly prohibited. Care must be used to
         avoid damaging the cartridges during removal and installation. The cost of repairing components
         damaged during maintenance will be the responsibility of the owner unless maintenance activities are
         being performed by Stormwater360 and damage is not related to discharges to the system.

16.      Set the used cartridge aside or load onto the hauling truck.

17.     Repeat steps 14 to 15 once all cartridges have been removed.

18.      Remove deposited sediment from the floor of the vault and, if large amounts are present, from the
         forebay. This can be accomplished by using the Vacuum truck

15       Once the sediments are removed, it is necessary to assess the condition of the vault, particularly the
         manifold and the connectors. These are short sections of 2-inch schedule 50 PVC, or threaded
         schedule 80 PVC that should protrude above the floor of the vault. If required, apply a light coating of
         FDA approved silicon grease to the outside of the exposed portion of the connectors. This ensures a
         watertight connection between the cartridge and the drainage pipe. Replace any damaged
         connectors.

16.      Using the boom, crane, or tripod, lower and install the new cartridges (typically 16-17kgs. for perlite
         cartridges). Once again, take care not to damage connections.

17.      Close and fasten the door, and remove safety equipment.

18.      Make notes about the local drainage area relative to ongoing construction, erosion problems, or high
         loadings of other materials to the system.

19.      Finally, dispose of the residual materials in accordance with applicable regulations.             Make
         arrangements to return the used cartridges to Stormwater360.




2.4.4    Related Maintenance Activities (Performed on an as-needed basis)

StormFilter units are often just one of many components in a more comprehensive stormwater drainage and
treatment system. The entire system may include catch basins, detention vaults, sedimentation vaults and
manholes, detention/retention ponds, swales, artificial wetlands, and other miscellaneous components. In
order for maintenance of the StormFilter to be successful, it is imperative that all other components be


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