Appendix C - site and soild evaluation for on site effluent.pdf

Soil Borehole Results



                                 Depth                      Soil Description
                                 00-400                     Silty Clay CL
                                                            Light to med clay, dark brown
                                                            Moist, moderate (Cat 4)

                                 400-900                    Silty Clay CH
                                                            Med to heavy clay, pale brown orange
                                                            Moist, moderate (Cat 5)

                                 2000                       Borehole Terminated
                                                            Dense gravel


Constant Head Method permeability results


The following design criteria is applicable for the following disposal methods:

                                                                  1            2               3
                             Fall                  (mm)           25          25              25
                             Time                  (mins)         52          60              43
                                                   (secs)         12           4              58
                          Permeability             (Ksat)       0.0766       0.0666          0.0910
                         Soil Category                            5            5               5
                           Structure                           Moderate     Moderate        Moderate


Indicative Permeability

         Test Site:                        1                       2                      3
        Soil Category                      5                       5                      5
          Structure                    Moderate                Moderate               Moderate
        Permeability                   0.06-0.12               0.06-0.12              0.06-0.12
             DIR                           3                       3                      3

Recommendations:

Based upon our Site and Soil Assessments we recommend the following method of On-Site Effluent Disposal
should be used.

For the treatment of the Effluent we recommend;


      Advanced Secondary WasteWater Treatment System (AWTS)
(NOTE: The system chosen must satisfy both the Queensland Plumbing and Wastewater Code and AS 1547 - 2012
On-Site Domestic Waste Water Code and be approved for use by the Local Shire/Council governing the allotment.)

For the disposal of the treated effluent within the Land Application Area we recommend;

      A Pressurised Surface Reticulated Irrigation System
(NOTE: Where Surface irrigation is used the treated effluent shall be disinfected with chlorine prior to dosing of
the Land Application Area.)


   AUSTRALIAN SOIL INVESTIGATIONS                                      3                               ASI Ref: 240038 (A)