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

Preparation of irrigation area:

When a proposed irrigation area has a low permeability, it is particularly important to ensure that the permeability
of the soil in the irrigation area is improved and maintained and that there is an adequate cover of porous and
fertile topsoil to act as immediate storage of effluent applied to it, and to support rapid growth of vegetation on the
area to maximise evapo-transpiration.


Requirements of irrigation system:

All irrigation pipe work and fittings shall comply with all parts of AS 1477 or AS 2698.2. The distribution irrigation
lines should be buried to a minimum depth of 100mm. There shall be no cross connection between any irrigation
pipe work and the potable water supply. Any pipe work used for the transport of effluent included treated effluent
must be lilac in colour.

Along the boundary of the surface irrigation area there shall be at least two warning signs clearly visible to inform
the occupants of the premises that recycled water is used for irrigation. Each sign shall comply with AS 1319 and
have:

      (a)    lettering visible at 3m and
      (b)    wording:              Recycled Water
                                   Avoid Contact
                                   DO NOT DRINK

Prior to the use of the system, the warning signs and the landscaping and surface preparation must be completed.


Sighting of the Land Application Area:

The current Code of Practice for On-site Sewerage Facilities (Queensland Plumbing and Wastewater Code) provides
minimum horizontal/vertical separation distances for Land Application Areas. They are as follows;

             Surface Land Application Areas (ADVANCED SECONDARY)
             Property Boundaries Upslope from the Area     -      2.0m
             Property Boundaries Downslope from the Area   -      4.0m
             Dwellings or buildings                        -     10.0m
             In ground swimming Pools                      -      6.0m
             In-ground potable Water Tanks                 -      6.0m
             Dams, Watercourses or Bores                   -     10.0m
             Vertical distance to water table              -      0.6m
             Driveway                                      -      2.0m                      (Upslope);
             -                                             -      4.0m                      (Downslope)
             Footpath                                      -      1.0m                      (Upslope);
                                                           -      2.0m                      (Downslope)

NOTE:- REFER TO QUEENSLAND PLUMBING AND WASTEWATER CODE FOR SITING OF ON
       SITE SEWERAGE FACILITY FOR LOCATION OF TREATMENT PLANT. TREATMENT
       PLANT MUST BE 150mm ABOVE Q100 FLOOD LEVEL.

In no instance shall Effluent be used for irrigation of fruit or vegetables.

No Vehicle loading or recreational areas to be applied or constructed within the Land Application
Area.




   AUSTRALIAN SOIL INVESTIGATIONS                              5                                ASI Ref: 240038 (A)