On-Site Effluent Report

5.0     SITE EVALUATION:

                                   Feature                        Satisfactory      Unsatisfactory
                  Primary Siting                                        
                  Alternative Siting                                    
                  Seepage to Adjacent Property                          
                  Seepage to Ground water                               
                  Permeability                                          
                  Soil Type                                             
                  Soil Depth (min required = 600mm)                     
                  Ground Water Level                                    
                  Run-off                                               
                  Seepage from Upslope                                  


6.0     DISPOSAL SYSTEM RECOMMENDATIONS:

Based on our site assessment and testing we recommend that the most appropriate method of treating and
disposing of effluent to be:

Advanced Secondary Aerated Wastewater Treatment Systems with Surface Spray or Covered Sub-Surface
Drip Irrigation.


6.1     IRRIGATION SYSTEM CALCULATIONS:

We recommend approved on-site Advanced Secondary Aerated WasteWater Treatment Systems (AWTS) or
approved Aerobic Sand Filtration Systems be used to reduce the pathogen loads in wastewater produced within
the proposed allotments. Effluent quality from the plants must comply with the criteria presented in AS 1547-2012.

We recommend a Covered Surface, Sub-Surface Drip Pressurised Irrigation or Surface Spray Irrigation Systems
be used in conjunction with the approved Treatment Systems to distribute the treated effluent in equal dosing
across the Land Application Area. A typical Site layout and arrangement drawing is attached.

TYPICAL CALCULATION:

  Minimum requirement      q       120           litres per person per day   AS 1547 –2012 Appendix H1

      Water Supply              Tank Water

  Number of persons =               6                                            AS 1547 Table J1


      Total Volume         Q=     5040       L/week

      Soil Category                 5                                            AS 1547 Table M1

 Indicative permeability        0.06-0.12                                        AS 1547 Table M1

          DIR                      21        mm/week                             AS 1547 Table M1

                                              2
      Disposal Area        A=      240       m


WE WOULD THEREFORE RECOMMEND THAT A MINIMUM LAND APPLICATION AREA OF 240 m 2 FOR A
CATEGORY 5 SITE BE PROVIDED FOR A TYPICAL 4 BEDROOM DWELLING WITH A MAXIMUM
POPULATION OF 6 PEOPLE.


AUSTRALIAN SOIL INVESTIGATION                                5                                      ASI Ref: 260090(A)