Stormwater Management Plan MCU17/0014

2.4.2 Major maintenance inspection                                 2.4.3 Major maintenance: sediment
      (once a year)                                                      removal and cartridge replacement
                                                                         (and emergency)
The primary goal of the major maintenance inspection is
to assess the condition of the cartridges relative to the          Major maintenance/filter cartridge replacement typically
level of sediment loading. It may be desirable to conduct          involves the steps below. However, if it appears that a spill
this inspection during a storm to observe the relative flow        of some type has occurred, the local hazard control agency
through the filter cartridges. If the submerged cartridges         and Stormwater360 should be notified immediately. In the
are severely plugged, large amounts of sediments should            case of a spill, the worker should abort maintenance
be present and very little flow will be discharging from           activities until the proper guidance has been obtained.
the drainage pipes. It is likely that the cartridges need to
                                                                   Depending on the configuration of the particular system, a
be replaced. Major maintenance inspection will typically
                                                                   worker may be required to enter the vault to perform some
involve the steps below. However, if it appears that a spill of
                                                                   tasks. If vault entry is required, OH&S rules for general
some type has occurred, the local hazard control agency
                                                                   confined space entry must be strictly adhered to. Filter
and Stormwater360 should be notified immediately. In the
                                                                   cartridge replacement should occur during dry weather
case of a spill, the worker should abort maintenance
                                                                   and it may be necessary to plug the filter inlet pipe if base
activities until the proper guidance has been obtained.
                                                                   flows exist. Standing water present in the vault should be
Steps for Pre-Major Maintenance Inspection                         regarded as polluted and contained during this operation by
                                                                   temporarily capping the manifold connectors.
 1    Maintenance to be performed by a skilled worker
      familiar with StormFilter units.

 2    If applicable, set up safety equipment to protect
                                                                          Please note: Confined space entry may be
      pedestrians from fall hazards presented by open
                                                                          required on StormFilter systems. In this case,
      doors. Also, set up appropriate safety equipment for
                                                                          please ensure that appropriate Confined Space
      work near roadways.
                                                                          entry training and subsequent certification has
 3    Inspect the external condition of the unit and take                 been undertaken and is valid, and work
      notes concerning defects/problems.                                  procedures are strictly adhered to. If you are
                                                                          unsure, do not enter the vault and contact
 4    Open the access covers to the vault and allow the vault to
                                                                          Stormwater360 immediately.
      air out for 5-10 minutes.

 5    Without entering the vault, give the inside of the unit,
      including components, a general condition inspection.

 6    Take notes about the external and internal condition.

 7    Give particular attention to recording the level of
      sediment build-up on the floor of the vault, and on top
      of the internal components.

 8    Remove large loose debris and litter using a pole with a
      grapple or net on the end.

 9    If the visit is during a storm, make the flow observations
      discussed above.

10    Close and fasten the access cover, and remove
      safety equipment.

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

12    Review the condition reports from the previous
      minor and major maintenance visits and schedule for
      cartridge replacement if needed.




24   Stormwater360 Operations and maintenance