Request for Further Information - 010.2008.00001896.001 [As Published] · 142008.1896

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8.    Outlet protection should be provided for the low flow pipe at the earth weir.
9.    The microphyte discharge riser is not indicated on the plan view.
10.   Engineering drawings and calculations are to be signed off by RPEQ.
11.   Full drainage calculations are to be submitted for assessment.
12.   Access ramps should be provided for the maintenance of the forebay sediment pond.
13.   Provide cross sections along the major storm bypass swale, together with calculations
      supporting the sizing of the same.
14.   The sediment forebay shall have a concrete base for cleaning/ maintenance purposes.
15.   Please provide an indication of the sump location for the sediment forebay.
16.   Council prefers that gabions not be considered for these works due to the high maintenance
      costs.
17.   Please provide koala food trees across the bund.
18.   Please provide fence details on walls and bunds for pedestrians and public access.
19.   Batter slopes are to be planted out with suitable vegetation for public safety from ponds.
20.   Final plans, calculations and documentation may be referred to Council’s external consultants
      for review at the applicants cost.


Land Development (Environmental Scientist)
ENVIRONMENTAL REQUIREMENTS
21.   Given that the receiving environment may have adapted over time to the ongoing loads from
      Noosa Junction, Council is concerned that the wetland concept has been designed to
      establish water quality that may not be applicable to the current environmental requirements of
      the receiving environment. Therefore, provide a report that details:
      21.1.     Current nutrient loads and stormwater flow velocities to the wetland area.

      21.2.     Likely sources of pollution to the wetland, positive and negative impacts of the pollution
                loads and indicate whether there is any opportunity pollution /waterquality
                management measures to be installed upstream of the proposed wetland.

      21.3.     Environmental requirements for species protected by legislation in the proposed
                wetland area and receiving environment and their essential habitat in terms of nutrient
                concentrations and water flow variability pattern requirements.

      21.4.     Measures proposed to be incorporated into the wetland design to minimise the
                opportunity for cane toad and mosquito breeding.

WETLAND DESIGN
22.   Council officers are concerned that the design and performance of both wetlands and
      bioretention basins have advanced significantly since the feasibility study was undertaken.
      The wetland design should be updated to reflect current best practice. The updated design
      must specify:
           i.velocities through the wetland and bypass channel;
          ii.weir sizing and levels;
         iii.maintenance requirements in detail and the their costs; and
         iv. use Tewantin/Noosa rainfall and evaporation data as opposed to Cooroy data that was
             used in the initial study.
          v. Whether the wetland will mitigate >1yr ARI flows.

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23.   Council officers are concerned that the wetland is not big enough and may cause scour.
      Therefore, provide a Hec-Ras, Mike 11 or full 2d flow model to demonstrate that flow short
      circuiting or scour will not occur.
24.   Council officers are concerned that the smooth configuration of the concrete spillay does not
      provide any dissipation to protect the receiving area from scour. Therefore provide details of
      any dissipation and rip rap proposed along the spillway/ at its outlet based on the maximum
      expected velocities of water discharge from the wetland.
25.   Provide comment whether scour protection is required at the stormwater outlets shown on
      drawing JO7-071-01 and at the proposed outlet of the concrete pipes from the sediment
      forebay spillway.
26.   Please provide engineers detail as referenced on drawing J07-071-02.
27.   Council is concerned that the wetland is proposed in proximity of the Council sewer main and
      sewer pump station. Include monitoring for faecal coliforms at an appropriate frequency
      during construction to ensure damage to the pump station does not occur.
28.   Indicate the location of the sewer pump station overflow path on Drawing J07-071-04.
29.   Please label the sections on J07-071-01.
30.   Drawing JO7-071-05 states that handrails will be installed to an unnamed standard. Specify
      the relevant standard on the drawing.
31.   Specify the minimum rock size requirements on drawing JO7-071-05, based on maximum
      expected velocities.
32.   Incorporate a safety device within the pipework to ensure humans do not enter or become
      stuck in the pipework.
33.   Council is concerned that the bathymetry of the wetland is not reflective of a natural
      environment. Furthermore, the grade of bathymetry may affect the mosquito breeding
      success. Please provide a revised longitudinal section and an ecologist comment on the
      suitability and diversity of habitat zones proposed.
34.   Council is concerned that the absence of a high flow bypass will compromise the viability of
      the microphyte zone in high flow situations. Please provide justification for the absence of the
      high flow bypass from the wetland design.


SEDIMENT AND EROSION CONTROL PLAN
35.   Show approximate location of site exit referred to on Drawing J07-071-03.
36.   The erosion and sediment control plan refers to the requirement for a dam upstream of the
      sediment forebay during construction. Please indicate the dimensions and depth of the
      required dam.
37.   The Erosion and Sediment control plan proposes a turbidity release limit of 140 NTU based on
      the correlation of suspended solids and turbidity at another site. Council understands the
      correlation was based on all data points including many values where TSS exceeded the limit
      of 50mg/L. Council will only consider the correlation based on compliant TSS values of less
      than or equal to 50mg TSS/L. In this respect, provide Council with the data detailing the stated
      correlation in excel format. In order for council to accept any correlation please confirm to
      Council that the soil types at the subject site is the same/ consistent in terms of TSS and NTU
      correlations to the soil at the site where the correlation was sourced from.
38.   All Sediment and Erosion Control plans must be signed by an RPEQ or CPESC.

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39.   There is concern that 900gsm coconut blanket does not breakdown and is also unsuitable for
      reinforcement of steep slopes and in high flow environments – i.e. 5-7m/second. Reconsider
      the stabilisation material proposed, with consideration of the velocities expected in the areas
      to be reinforced and the requirement for the material to breakdown once vegetation is
      established.
40.   The Erosion and Sediment Control plan states that the sediment basin will contain ground
      water and surface water flows. Council is concerned that the intrusion of groundwater to the
      sediment basin may affect its performance. Please provide comment on the impact the
      groundwater intrusion will have on the performance of the sediment basin and advise of any
      special management requirements.
41.   Please show water quality monitoring locations referred to on the Erosion and Sediment
      Control Plan.


ENVIRONMENTAL MANAGEMENT PLAN
42.   Please amend the EMP is respect to the following comments:
      42.1.  Information presented in the Environmental & Planning Committee Report 01/02/08 –
             ordinary Meeting 14/02/08 states that Cape Bouvard is willing to undertake the annual
             maintenance requirements of the wetland for the first 3 – 4 years, being the remaining
             length of time to complete future stages of Settlers Cove development. During this time
             Cape Bouvard will prepare a maintenance manual drawing from the experience of 3-4
             years maintenance works. Information presented in the EMP with the application refers
             to Council being responsible for maintenance of the wetland at completion of
             construction. This is contrary to agreements made in the preliminary approval.
             Therefore, please amend the EMP to be reflective of the maintenance agreement
             made in the preliminary approval.
      42.2. Define “attendee”.
      42.3. Define “fully briefed” as referred to on pg 6 of the EMP.
      42.4. Trees for removal should be inspected for wildlife on the day of their removal.
      42.5. Herbicides are not permitted within 30m of waterways.
      42.6. Define “humane manner”
      42.7. Provide information on the existing TSS entering the parkland.
      42.8. Provide existing groundwater levels and include a dewatering Management Plan.
      42.9. Include requirement for hazardous substances to be stored and handled in accordance
             with the relevant Australian Standard.
      42.10. Include a contingency management plan in the event the site should be shut down for
             unforseen circumstances.
      42.11. Provide a plan wit the expected location of the acid sulfate soils treatment pad.
      42.12. Identify the final location for treated acid sulfate soils.
      42.13. Identify what the leachate water will be inspected for as referred to on pg 6 of the Acid
             Sulfate Soil Management Plan.


Land Use (Environmental Planner)
43.   The site is located within the Biodiversity Overlay. This particular attributes are Environmental
      Protection, Environmental Enhancement and Koala Habitat Area. The site is adjacent to a
      Riparian Buffer area. Provide an assessment of the flora and fauna values of the site in
      accordance with Section 4 of the Planning Scheme Policy 18 Ecological Assessment
      Guidelines. Attention shall be paid, but not limited to, the likelihood of the presence or suitable
      habitat for protected species listed in applicable legislation and supporting documents.

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44.   Provide an assessment of the proposal with reference to the Specific Outcomes 1 to 20 of the
      Biodiversity Overlay code of the Noosa Plan. The assessment is to be undertaken by a
      suitably qualified person with at least 5 years experience in the field of ecological impact
      assessment.
45.   Provide an assessment of the likely impacts of the construction and operational usage of the
      proposed wetlands according to Nature Conservation Criteria of the Nature Conservation
      (Koala) Conservation Plan 2006
46.   Provide an assessment of the likely impacts of the construction and operational usage of the
      proposed wetlands on the extant vegetation taking into account the affected tree species, their
      drip zones and the changes to the hydrological regime.
47.   Provide a comprehensive plan detailing the location, structure, age, condition, and species of
      the tree species within the vicinity the proposed works.
48.   Provide an assessment of the likely impacts of the change in the hydrological regime, land
      forms and flow paths on the adjacent lands, with reference to likely changes to the flora and
      fauna assemblages.
49.   Provide an assessment of the impacts of the proposed wetlands on the water quality
      discharged from the site. This assessment shall describe the before, after, impact and control
      scenarios of the water quality assessment of impacts.

Environmental Services (Conservation Partnerships Officer)
50.   Please indicate the number, and species of native trees that will be removed to accommodate
      the proposed wetland.
51.   Please describe what impact the removal of native trees will have on the integrity of the Koala
      Corridor in this area.
52.   What Measures will be put into place to offset the clearing of native trees to accommodate the
      proposed wetland.
53.   The listed frog species, Crinia tinnula occurs in the wetland areas. How will the impact on this
      species be minimised during earthworks.


General
It would be advantageous that a meeting be arranged between yourself, your consultants and
Council staff at a suitable time to discuss the points above. Please call Ron Read (ph 5449 5263) to
arrange a suitable time.
Under the provisions of the Integrated Planning Act 1997, you have three options available in
response to this Information Request. You may give the assessment manager (in this instance
Council) and each referral agency (if any):
1.    all of the information requested; or
2.    part of the information requested together with a letter asking the assessment manager and
      each referral agency to proceed with the assessment of the application; or
3.    a letter:
      (i)    stating that you do not intend to supply any of the information requested; and

      (ii)   asking the assessment manager and each referral agency to proceed with the
             assessment of the application.

Please be aware that under Section 3.2.12 of the Integrated Planning Act 1997, the applicant is to
respond to any information request within 12 months of the request or otherwise, the application
lapses.

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A response to the above is required to be submitted, prior to further assessment of the application. If
any further matters arise as part of assessment of this application, you will be advised accordingly.

Council prefers that all the information requested be submitted as one package.
Information on the status of development applications may be viewed using PD Online, which is
accessible via the Sunshine Coast Regional Council website www.sunshinecoast.qld.gov.au . Using
the "Quick Links" on the left hand side of the screen, users may select "PD Online" by clicking on it,
which will take users to the Planning and PD Online page. At this point, a disclaimer will show; users
may click on "agree" if they agree and can enter either the development application number, or the
address of the property to start viewing information on it on the application.
Should you have any further queries in relation to the above, please do not hesitate to contact me on
the above number.

Yours faithfully




Ron Read
SENIOR TECHNICAL ASSESSMENT OFFICER