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• 3. Open the doors to the vault and allow Replacement cartridges will be delivered to the system to air out for 5 -10 minutes. the site. Information concerning how to obtain the replacement cartridges is 4. Without entering the vault, inspect the available from CONTECH Stormwater inside of the unit, including components. Solutions. 5. Take notes about the external and Warning: In the case of a spill, the worker internal condition of the vault. should abort maintenance activities until the proper guidance is obtained. Notify the Be sure to record the level of sediment local hazard control agency and build -up on the floor of the vault, in the CONTECH Stormwater Solutions forebay, and on top of the cartridges. If immediately. flow is occurring, note the level of water and estimate the flow rate per drainage To conduct cartridge replacement and pipe. Record all observations. . sediment removal maintenance: 6. Remove large loose debris and trash 1. If applicable, set up safety equipment to using a pole with a grapple or net on the protect pedestrians from fall hazards end. due to open vault doors or when work is being done near walkways or roadways. 7. Close and fasten the door. 2. Visually inspect the external condition of 8. Remove safety equipment. the unit and take notes concerning defects /problems. 9. Make notes about the local drainage area relative to ongoing construction, 3. Open the doors to the vault and allow erosion problems, or high loading of the system to air out for 5 -10 minutes. other materials to the system. 4. Without entering the vault, give the 10. Finally, review the condition reports from inside of the unit, including components, the previous minor and major a general condition inspection. maintenance visits, and schedule cartridge replacement if needed. 5. Make notes about the external and internal condition of the vault. Major Maintenance Give particular attention to recording the Depending on the configuration of the level of sediment build -up on the floor of particular system, a worker may be required the vault, in the forebay, and on top of to enter the vault to perform some tasks. the intemal components. • Important: If vault entry is required, OSHA 6. Remove large loose debris and trash rules for confined space entry must be using a pole with a grapple or net on the followed. end. . Filter cartridge replacement should occur 7. Using a boom, crane, or other device during dry weather. It may be necessary to (dolly and ramp), offload the plug the filter inlet pipe if base flows exist. replacement cartridges (up to 150 lbs. Standing water present in the vault should each) and set aside. be regarded as polluted and should be 8. Remove used cartridges from the vault contained during this operation by using one of the following methods: temporarily capping the manifold connectors. ©2c06 CONTECH Stormwater Solutions Toll -free: 800.548.4667 5 of 9 contectulormwater.com Vault, CIP and Linear Stormfl6er Operation and Maintenance Guidelines