Document 1 · OPW11/0177

ELEMENT:                                                MAINTENANCE OF RAPID
                                                        INFILTRATION PITS (RIP's)
1.    Objective                To ensure ongoing function of RIP's in reintroducing
                               runoff into the subsoil.

2.    Management Strategy      Treat runoff from vehicular hardstand areas via
                               grease/oil arrestor units prior to discharge to RIP's.

                               Regularly service grease/oil arrestor units and RIP's to
                               ensure ongoing function.

3.    Actions                     1. Grease/oil arrestor
                                  -  service        as         per        manufacturers
                                     recommendations
                                  2. RIP's
                                  Daily/storm events
                                  -  inspect for overtopping or blockage
                                  Monthly
                                  -  inspect base of pit
                                  -  remove accumulated debris, silt and organic
                                     matter and dispose of to waste
                                  -  inspect geofabric filter (BIDM A14 material)
                                  -  Clean/replace if clogged/torn/damaged
                                  Annually
                                  -  replace geofabric filter
                                  -  inspect underlying sand filter layer for
                                     contamination/clogging
                                  -  replace sand filter layer if required

4.    Performance Indicators   No overtopping of RIP's during design storm events

5.    Frequency/Deadline       Inspections as detailed above.
                               Reporting at monthly body corporate meetings.

6.    Responsible     Person   Body corporate to ensure maintenance schedule
      /Organisation            adhered to.

                               Maintenance   contractor   to  make   entries in
                               environmental diary noting date of RIP service,
                               condition of RIP, material removed and means of
                               disposal.

7.    Reporting and Review     Maintenance     Contractor   to   make      entries  in
                               environmental diary noting date of service, conditions,
                               material removed and means of disposal.
                               Body Corporate to keep record of grease/oil arrestor
                               and RIP servicing.

8.    Corrective Action        Review maintenance schedule as appropriate.