wastewater design · MCU22/0192

Future Shed.

We recommend the installation of a 3000It (min capacity) all-waste septic tank with
outlet filtration to treat the domestic wastewater to primary quality (it should be noted
that the local regulatory authority may have larger minimum size requirements than
those recommended).

The final location of the septic tank will be determined/confirmed on-site by variable
consequences (e.g. finished floor levels, distances, allotment configuration and
topographical constraints) over which we have little control. This final placement
may necessitate the use of a pump and 450It pump well to enable the Land
Application Area to be located above the septic tank.

Notwithstanding the final location of the septic tank and the Land Application Area
particular attention should be paid to protecting any, or all pipework below driveways
or access tracks, or such trafficable areas.

The primary treated effluent is to be pump-dosed into and along the conventional
absorption trench/bed system. Thus receiving treated effluent and residuals in a
manner and at a rate that enables their further treatment by natural in-soil stabilisation
processes so that the resulting clarified carriage water is environmentally and
hygienically acceptable for groundwater infiltration or evaporation and plant
transpiration into the atmosphere.

All wastewater treatment plants/systems work less efficiently when overloaded with
solid wastes. All reasonable and necessary actions and efforts to restrict the flow of
solid wastes, particularly from the kitchen, shall be encouraged and employed by all
present and future owners/ occupiers/users of this Land Application Facility.

Effluent quality from the septic tank must comply with the AS/NZS 1547-2012 On-
site Domestic Wastewater Management, the Queensland Plumbing & Wastewater
Code and be confirmed with the regulatory authority.

A reserve area equivalent to 100% of the calculated design recommendation is
available on-site for future use and is to be protected from any development that
would prevent its use in the future.

 

Unearthed Geotechnical P/L. 8 Design Report 022-164