Appendix H - Slope Stability Assessment

Brett Hage                                                                                     22328-001-Rev0
                                                                                            14 September 2022

Detailed design of the effluent disposal systems must be carried out by a NC registered evaluator to
accompany the plumbing application at the building stage, once the building designs are finalised.
5.3.4 Maintenance and Inspection
Operation and maintenance of a HSTP is the responsibility of the property owner. A licensed service agent
must be appointed to undertake routine servicing works in line with regulatory authority approval conditions.
To comply with NC requirements, the following management and inspection shall be implemented once the
effluent disposal systems are established:
       Continuous monitoring by the property owner for any signs of system failure such as septic odour,
        seepage, soil and/or plant discoloration.
       Should any signs of system failure be observed by the property owner, including the in-built HSTP
        failure alarm, the manufacturer shall be contacted immediately to arrange for the necessary repairs.
       Quarterly inspection, testing and repair (if necessary) to the HSTP and irrigation area by a Licensed
        Inspector (normally a service provided by the HSTP manufacturer).


6.0     SUMMARY & CONCLUSIONS
Based on the findings of our assessment we consider that there would be a Low Risk of slope instability
impacting the proposed development. This advice is subject to implementation of the recommendations
given in this report.
This assessment relates only to the proposed subdivision for the development application
process. Existing structures, batter slopes and road connections may be subject to risk of slope
instability but assessment of those matters was beyond the scope of our commission. Also excluded
from this assessment are any future building works, which would be subject to site specific assessment
and review by a geotechnical RPEQ prior to construction.



7.0     LIMITATIONS
Your attention is drawn to the document Limitations, which is attached to this letter report.
Please contact the undersigned should you wish to discuss any of the above matters.
Yours faithfully

TECTONIC GEOTECHNICAL PTY LTD




Robert Gibb BSc (Hons)                                     Ashley Davey BEng (Geological) RPEQ 8159
Engineering Geologist                                      Principal Geotechnical Engineer


Attachments: Figure 1 – Site Plan
             Borehole Logs & Explanatory Notes
             Laboratory Test Certificate
             Qualitative Terminology for Use in Assessing Risk to Property
             Some Guidelines for Hillside Construction
             Limitations




                                                      19/19