Appendix E - Wastewater Report

                             PROPOSED RESIDENTIAL SUBDIVISION
                             9A JIRRIMA CRESCENT, COOROIBAH




                              Application Area
                              (Approx. 300m2)




                                                 HSTP




Text Figure 6: Looking west across current application area (surface irrigation) for Lot 2


5.0      AIMS & METHOD OF INVESTIGATION
The main aim of the investigation was to confirm feasibility of on-site wastewater management for the
proposed lot reconfiguration. It is understood that this report will be submitted to Noosa Council to support a
Development Application for Reconfiguration of a Lot. The investigation and report have therefore been
designed to address the requirements of the relevant Noosa Council codes and policies, together with
Australian Standard AS1547-2012 On-site Domestic Wastewater Management.
An experienced geo-environmental scientist from Tectonic undertook a site walk-over to visually assess
possible constraints to on-site wastewater management on 27 October 2020. The walk-over included
assessment of soil and rock outcrops (if any), surface drainage conditions, topography, evidence of erosion,
and vegetation coverage/condition.
This was incorporated with a subsurface investigation comprising the hand augered drilling of one borehole
(designated HA1) to a depth of 1.5 m below ground level (BGL), in the area likely to be used for onsite
effluent disposal.
The environmental scientist undertook logging of soil profiles in accordance with AS1726 Geotechnical Site
Investigations. The borehole was positioned within the area likely to be utilised for on-site effluent disposal
on proposed Lot 1 based on the layout plan provided. The borehole was backfilled with drilling spoil and
compacted to the ground surface level upon completion.
The borehole log together with notes explaining the terms and symbols used are presented in Appendix A.
The borehole location is shown in Figure 1 (at end of text).




4 November 2020
Report No. 20333-001-Rev0                               4