AA1384_Effluent Report_final

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       A section of Mud, peat; freshwater swamp deposits in coastal areas aged from the
       Quaternary period is located in the north of the site.

       2.5       Soil Profile

       Field sampling carried out by Duke Environmental on 31 August 2016 up to a depth
       of 800mm below surface level indicates that the soil is dominated by sand.

       Refer to Drawing DE1384/03 for location of boreholes and Site Borelogs in
       Appendix A.

       2.6       Soil Permeability

       Soil permeability (Ksat) of >3.0 is estimated from the site soil category of 1 (Gravels
       and sand) (Refer AS1547-2012).

       2.7       Acid Sulfate Soils

       Council Acid Sulfate Soil overlay mapping indicates a section in the north of the lot
       is mapped as Low Potential Acid Sulfate Area 5-20m AHD. This area generally
       correlates with the geology mapped area of mud, peat; freshwater swamps. The
       reconfiguration plan indicates this area of the site is designated for vegetation
       covenant and therefore is also outside of the disposal area.

       2.8       Site Constraints & Opportunities

       The site is mapped within a Coastal Protection Area under the Noosa Plan and is
       located in close proximity to the beach. Wastewater systems will need to be
       maintained and operated in a manner to prevent overflow or discharge to
       surrounding areas. The retention of vegetation under covenant may limit the
       opportunity for a reserve area, however the option exists to replace the soil in the
       treatment area should the need arise.


3.0    WASTEWATER TREATMENT AND DISPOSAL SYSTEM DESIGN PARAMETERS

       3.1       Wastewater Treatment and Disposal System

       The dwelling on proposed Lot 2 is serviced by a septic tank and trench bed system
       to treat on site wastewater. This dwelling is also serviced by a greywater tank and
       has a separate septic tank servicing a detached amenities building. The dwelling on
       proposed Lot 1 appeared to be serviced by a septic tank. As site plans for the
       systems were not available, a licensed plumber was commissioned by the client to
       inspect the systems. The results of the inspection indicate that all systems servicing
       the property do not meet current standards and will require replacement. According
       to the plumbing report there are no active trench bed systems. Septic tanks
       observed on site were contained within the proposed site boundaries of the lot
       which they serve. Refer to Drawing DE1384/03 included in Appendix A for location
       of current tanks.

       3.2       Wastewater Treatment and Disposal System Design Parameters

                 3.2.1   Design Flows

                 Design flows have been calculated for each dwelling, based on a potential
                 for five (5) persons per dwelling (assuming redevelopment).

                 Based on Table H2 of Australian Standard AS/NZS 1547:2012 we have
                 adopted a daily flow of all wastes of 150L/person/day.

AA1384EFF
September 2016
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