Effluent Disposal Report

5.0 DESIGN RECOMMENDATIONS

We recommend the installation of an Advanced Enviro-septic™ domestic
wastewater system to treat the domestic wastewater to a secondary or advanced
secondary quality.

We recommend the installation of a 3000 litre (min capacity) all-waste septic tank 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 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 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,
access tracks, or such trafficable areas.

The treated effluent is to be dosed into and along the Advanced Enviro-septic™ pipes.
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.

Pump systems (if required) shall

e have a storage capacity equal to 50% of the daily flow allowance, and sufficient
to match the electrical starting requirements of the irrigation pump motor

e have performance characteristics that match the hydraulic characteristics of the
irrigation system

* have a discharge of at least 50% greater than the maximum 30-minute flow rate
have a visual and audible alarm system (with muting ability) for breakdown
notification

e not be located adjacent to bedrooms, living rooms or recreational areas of
neighbouring properties

e be contained in an acoustic chamber to reduce noise emission of all equipment to
a level not exceeding 40 dB (measured as fast response at a distance of 1.0m),

e have incorporated into the facility pressure and/or velocity reduction fittings
installed sufficiently distant above the Advanced Enviro-septic™ piping.

The installed system will need capped 100mm diameter sampling ports accessible
above ground to enable analysis or the performance of the system according to
requirements in effect.

The installed system will need Oxygen Demand Vents, as per the Advanced Enviro-
septic™ requirements. Oxygen Demand Vents ensure air is drawn completely
through the Advanced Enviro-septic™ piping.

 

Unearthed Geotechnical P/L. 6 Design Report 020-212