RFI - Attachment D - Callaghan and Toth IR response

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                     Potential Biobasin site




   FIGURE 1:              Potentil Location of Biobasin to treat upstream catchment

ISSUE:        The playground is located within the Riparian Buffer Area of the Noosa Plan.

Item 17:      Clearly demonstrate how the proposed playground meets the Biodiversity Overlay Code for the
              Riparian Buffer Area, in particular Specific Outcome 5.

In response to the above Item 17 the following is offered:
           See the revised Environmental values report dated July 2020 which details how the playground meets
            Specific outcome 5 of the Biodiversity Overlay Code.


Item 18:      Demonstrate that there is an overall improvement to the water quality outcomes associated with the
              site by conserving, managing, enhancing and rehabilitation the ecosystem health and quality of
              stormwater entering receiving waters. In this regard, it is noted that water quality outcomes for the
              car parking within the Maple Street road reserve has not been addressed.

In response to Item 18 above the following information is offered:
           See amended Hinterland Playground SWMP Revision, dated 23rd July 2020. This report details that the
            proposed treatment train of the playground meets the required objectives of the SPP.
           The report also details that the new carparking on Maple Street will require a 20m2 biobasin to treat flows
            from these carparks and pathways to ensure water quality objectives are achieved prior to entry into Cooroy
            Creek.
           The frog pond is no longer a primary contact area and will now be a densely planted swale.




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ISSUE:        Viewing Platforms in Riparian Buffer Area

Item 19:      Clarify if and where viewing platforms are proposed. Where they are proposed demonstrate no
              adverse impacts on the environmental values of the riparian buffer area.

In response to Item 19 above the following information is offered:
           No viewing platforms are proposed to be installed on Cooroy Creek. The Ecological Assessment Report for
            Proposed Hinterland Adventure Playground prepared by the Noosa & District Landcare dated August 2019,
            assessed the site on the plans current in August 2019. Following further design work on the playground
            and consultation with Council, the viewing platforms were removed and are no longer proposed or shown
            on design plans for the playground.

ISSUE:        Borehole 27 remediated proposed, overlaps into riparian buffer area.

Item 20:      Demonstrate how the values of the riparian buffer are will be maintained and enhanced through the
              remediation process.

In response to Item 20 above the following information is offered:
           No clearing of existing riparian vegetation is proposed to remove contaminated material from around BH27.
             See attached CORE consultant’s report and Figure 1 in Core report (Doc No.: J000796-002-L-Rev1 dated
            2 June 2020). The contaminated removal area is on the edge of existing vegetation and may impact TPZ of
            retained vegetation.

ISSUE:        Contaminated Land

Item 21:      Provide information from a suitably qualified health professional about the suitability of the site for
              a playground with respect to the proposed usage of the site as a children’s playground and the
              historic use of the land. Consideration of site excavations, soil loading and long term usage by
              children and other vulnerable users should be presented. In this regard, the qualified health
              professional’s response should make reference to the two reports prepared by Core Consultant’s
              (March and December 2019).

In response to Item 21 above the following information is offered:
           Core Response: The previous reports completed by Core were completed by a Suitably Qualified Person
            (SQP) qualified in accordance with Sections 383(4) and 395(3) of the Environmental Protection Act 1994
            (EP Act). The findings from the investigations, determined that Lot 3 on SP230055 and Lot 1 and 2 on
            RP153299 are considered to pose a low health risk and is considered suitable for the current land use,
            which includes the proposed playground upgrades. Further investigations were recommended in order to
            facilitate the removal of Lot 3 on SP230055 off the EMR.

Item 22:      Provide copies of the two reports prepared by Core Consultant’s (March and December 2019)
              referenced in the Stormwater Management Plan.

In response to Item 22 above the following information is offered:
           See attached Core Consultants reports.




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ISSUE:          Road Reserve area has not been tested for contaminated land

Item 23:        Provide information regarding the likelihood of the Maple Street road reserve containing traces of
                chemicals associated with previous uses of the site.

In response to Item 23 above the following information is offered:
           Core Consultants have undertaken further testing in the area of playground that overlaps into the road
            reserve. See attached Core report J001102-001-L-Rev0 dated 1 July 2020. The results showed one
            borehole BH07 in the road reserve exceeding the available guidelines. It is proposed to do validation
            testing during works to remove any contaminated materials in this area.


If you require any further information please contact me on 5474 9081 or 0401 570 753.

Yours faithfully,
Callaghan & Toth




Jane Davissen BE Environmental
Senior Environmental Engineer
Please view www.callaghanandtoth.com.au for all information on our company profile and terms and conditions for services rendered




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