App B - Effluent Information

1.0 Introduction:
Biowater Designs Pty Ltd, in accordance with AS/NZS1547-2012 ( Domestic Wastewater Management ) and the
Queensland Plumbing & Wastewater code (QPW) 2019 Version 1, was commissioned to undertake a Site & Soil Evaluation
in the Noosa Council at 122 Musa Vale Road, Cooroy.

The results form the basis of our recommendations for on site wastewater disposal.

Our site investigation and field work was performed on Tuesday 11th April 2023 after a period of dry weather.

The investigation was undertaken to determine the soil profile and Long Term Acceptance Rate (LTAR) of the site in order
to accommodate a proposed new 1 bedroom detached studio. No laundry facilities will be provided in the studio.

NOTE: This evaluation was undertaken at the owner’s request after considerable discussion regarding environmental issues
of this site and preferred design of the Land Application Area.




2.0 Site Description:
2.1 Existing Buildings: Main dwelling and sheds. The existing dwelling does not form part of this assessment.


2.2 Site Factors:
The site is a large rural allotment the area is 415650.84m2.

The proposed Land Application Area is moderately sloping (5-15%).

The proposed Land Application Area has very good exposure to sun and wind.

Erosion, mass movement or land slip was not observed on this site. There are no visible rock outcrops on this site.

The proposed Land Application Area has approximately 100% grass cover.

There are no creeks, dams, bores or waterways on the site or adjoining sites within the setback requirements under the
Queensland Plumbing and Wastewater Code for Advanced Secondary effluent.

No groundwater was encountered to a depth of 2000mm.

There is no evidence of fill in the proposed Land Application Area.

Rain water will not transverse this site from adjoining properties during heavy rains.

Concentrated run-off from this property will not transverse adjoining properties during heavy rains.

Soils were dry and there is no evidence of soil surface cracking in the LAA. No evidence of compaction or seepage areas.
Salinity is not evident.


3.0 Soil Investigation:

3.1 Drainage Pattern: Linear Planar
3.2 Method:
Soil testing was conducted by Ground Drill Pty Ltd on 11th April 2023 to a depth of 2000mm within the proposed
Land Application Area. See borelogs page 8.

The soils were visual one textually classified in accordance with Table E1 AS/NZS 1547:2012.
Strongly structured Light Clays. Category 5 adopted.

Smooth plastic ball that can be rolled into a rod; slight resistance to shearing between
thumb and forefinger; forms a ribbon 50-75 mm long. Category 5 adopted.
The Site Classification has been completed by Ground Drill Pty Ltd and indicates class “P” site. See page 9.
Articulation Joints are therefore required and must be designed by a suitable qualified person.


                                                                                  C Copyright Lance Picton 2023 design & content.   2/11