220239 - 44 Williams Road, KIN KIN - Site Classification Report

                                   Soil Investigation Summary
Client       Eco Cottages                                                           Date      28/10/2021
Site Address Lot 3, SP 127443, #44 Williams Rd, Kin Kin 4571                        Job No SER 2507


                        Secondary Residence
                        * topographic siting (N4)
                        * some visual evidence of soil creep on the adjoining flank( refer to APPENDIX B
                        * steep gradient
                        * depths to rock
                       Building construction in these topographies should consider the details in
                       APPENDIX B 'Examples of Good Hillside Construction'.

Laboratory Data:       No significant clays however, the (CL) medium plastic clays are of
                       index values-:

                       - Plasticity Index 18%
                        - Linear Shrinkage 6.0%
                        - Estimated Instability Index 0.8%           (L242)

Site Classification:   In accordance with AS 2870 the two review areas are classified as -:
 (AS 2870-2011)

                        * Primary Residence - With reference to AS 2870, 2.5.3 (b)(i) the site is
                       classified 'P' uncontrolled shallow fill. However, based on clay reactivity, the
                       characteristic surface movement (Ys) ranges 20 - 25 mm or 'M'.

                        * Secondary Residence - Based on clay reactivity the characteristic surface
                       movement (Ys) ranges 25 - 30 mm or 'M'.

                       Estimated Cut          existing ( primary residence)/ Nil (secondary residence)
                       Estimated Fill         existing (primary residence) / Nil (secondary residence)
                       Site Scrape Only       Yes
                       Piers                  An option
                       Removal of Trees       Yes

Design Effluent        On-site effluent disposal required with two stand-alone systems proposed. The
Remarks:               existing serviced shed has a conventional septic system. The septic system
                       appears to be configure as a 3900 litre concrete septic tank and two X 12
                       metres infiltration trenches.

                       It is understood both the future main residence and secondary residence area
                       to have AES systems installed. The secondary residence e is adjacent the
                       existing serviced shed's septic tank and could possibly utilise this tank, with a
                       new AES bed located on the lower spur-line. The design soil category and
                       observations of each building area are as follows-:

                        * Main Residence - soil categories of 4/5 ( clay loam/ light clay). Application
                       area to the western flank.

                        * Secondary Residence - soil categories of 4/5 (clay loam/ light clay).
                       Application area to the area downslope of the serviced shed and reclining
                       spur line.




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