Response to information request REC13/0095

     6. Information Required.

                                                                        to treat water quality for
We believed that raingardens in each lot are the only practical measure
                                                                                  the systems. In
these three lots given Council’s constraints on siting access and maintaining
                                                                         not building new street
recent years urban OPWs for two to five lot subdivisions where we are
                                              Treatment   devices therefore  it is not considered
frontage did not require Stormwater Quality
reasonable to request them for  this instance.


The following alternatives have been investigated and rejected:

                                                                     is not feasible to pipe water
     . Due to the gully separating the road from the house sites, it
                                                   in the Wilgee street  road reserve.
       across the gully to a bio treatment system
     . A bio device could be
                                      below the Q 100
                                                 placedadjacent the  southeast  boundary of lot 5
           .
            however, it would have no maintenance access.
                                                                          future lot 13 would be also
     .      A similar device in the southwest corner of lot 5 or possible
                                                                       easement    and track over the
            impossible to access without a long temporary access
            balance land. This would put an unreasonable restriction on     the future options for the
                                                                                   the       Refer to
            balance land. There is also the issue of future sewers crossing
                                                                                       area.

               attached Master Sewer Plan 1225-3008.
                                                                                                     to the
      .        Lot 13 in the future development will have its roofwater and driveway discharge
                                                                                 the cul-de-sac head.  The
               street and then be treated by the bio basin proposed for beside
                                                                                    lots and the bio basin
               remaining  back       will be modelled in Music with the rest of the
                                       yard
               sized to ensure that the water quality targets are met.

                                                               be no other feasible solution to
Since Council do not prefer Raingardens there appears to
                                                                      site conditions and small
include Water Quality Improvement Devices. Due to the constrained
                                                                             the requirement for
number of lots on an existing road frontage, we request that Council remove
Water Quality Improvement Devices on this stage.




Yours faithfully,
Callaghan & Toth




~z=5
A Haynes BE Civil (Hans)RPEQ MIEAust CPEng

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Please view www.callaghanandtoth.com.au for all information on our company profile


Cc             Alex Mc Williams
               Max Watterson




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