Response to Information Request - MCU12/0184

                                                                                               ~
                                                                                           Callaghan & Toth

                            Pondage of water occurs at every minor rainfall event.
                            Weed growth occurs.


Corrective Action           The Owners Landscape Gardener will check up stream sediment control and fix
                            failures. The sediment build up will be removed without damage to existing
                            vegetation.
                            Unsuccessful plantings will be placed as required. A normal allowance of 10%
                            should be made for unsuccessful plantings.

                            Ensure watering rates are adequate and investigate plants with higher drought
                            tolerances if significant numbers of plants die during dry periods.

                            Replace geotextile, check and if necessary replace sand media with coarser
                            sand. Check that slotted pipe is not blocked and outlet free draining. Replace and
                            repair where necessary.
                            Erosion should be repaired and investigate ways to reduce erosion occurrence
                            e.g. place rock spalls upstream of the erosion so as to dissipate the flow across a
                            broad area.

                            Dominating weeds should be removed by hand and taken to the Council’s Refuse
                            Centre.




                                          RAINWATER TANKS

ISSUES                      PROCEDURES


                                                  Design Phase

Objective                   Ensure that rainwater tanks have sufficient water capacity to supply the
                            designed potable needs.


Actions                     The Consulting Engineer is to ensure that:

                                .     Tanks are sized in accordance with this Integrated Water Management
                                      Plan.

                                .
                                      Appropriate first flush diversion systems are installed on tanks
                                .     Rainwater tanks are installed with stainless steel mesh guards on any
                                      inlet and exit points

                                .     Tank overflows are to a stabilised point to prevent erosion

                                .     Tanks are fitted with an appropriate top up system, to allow
                                      supplementary dam water supply once tanks reach 10% capacity.
                                      There should be a suitable ’air-gap’ provided between the top water
                                      supply level in the tank and the supplementary supply to prevent
                                      backflow.


Monitoring                  Developer is to review the Works Plans and Building Plans.

Reporting                   Works Plans and Building Plans are to be provided to consultants, developer
                            and contractor.


Incidents                   The Rainwater Tanks are not approved according to submitted plans.




                                                                                                              B

1209 Animal Husbandry   Top Forestry Rd, Ridgewood
                        -
                                                                                               SWQMP
April 2013