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Appendix D - Geotechnical Report
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Test Pit No.
TP6
Page 1 of 1
Engineering Log - Test Pit Project No.: 26073
Client: Threedom Nominees Pty Ltd Commenced: 3/3/2026
Project Name: Proposed Subdivision Completed: 3/3/2026
Hole Location: 220 Black Mountain Range Road, Black Mountain Logged By: MM
Hole Position: 486551.0 m E 7080326.0 m N MGA2020 Zone 56 Checked By: RKG
Equipment Type and Model: 5t Excavator RL Surface: No survey
Excavation Dimensions: Datum: AHD Operator: Ryano's Civil
Excavation Information Material Description and Observations
Relative Density
Classification DCP TEST
Penetration
Pocket
Consistency
Graphic Log
Samples Material Description
Penetrometer
Condition
Recovery
Tests soil type: plasticity or particle characteristics,
Moisture
UCS Blows per 100 mm
Symbol
Method
secondary and minor components, colour
Water
Remarks RL Depth (kPa)
(m) (m) 0 5 10 15 20 25
100
200
300
400
500
Silty CLAY (TOPSOIL) medium plasticity, dark w= St
brown, with roots PL
CH
Silty CLAY, high plasticity, pale red brown,
DS_0.2-0.4m trace fine to medium sized subangular to
250
angular gravel (RESIDUAL)
w<
0.5 VSt
becoming pale grey mottled pale red brown PL
with medium to coarse sized angular gravel,
tending to extremely weathered MATERIAL 450
PHYLLITE, highly weathered, pale grey,
1.0 stained red brown, very low strength
Not Encountered
TECTONIC 3.00.2 LIB.GLB Log 1 TECTONIC BOREHOLE 26073.GPJ <<DrawingFile>> 31/3/2026 16:15 10.02.00.04 Datgel Lab and In Situ Tool - DGD | Lib: Tectonic 3.00.2 2021-03-30 Prj: Tectonic 3.00.2 2021-03-30
EX
1.5
becoming distinctly weathered, very low to low
strength
2.0
2.5
becoming slightly weathered, with low strength
Hole Terminated at 2.80 m
Target depth
3.0
Method Penetration Water Samples and Tests Moisture Condition Consistency/Relative Density
N - Natural Exposure VE - Very Easy Level (Date) U## - Undisturbed Sample (## mm) D - Dry VS - Very Soft
X - Existing Excavation E - Easy DS - Disturbed Sample M - Moist S - Soft
BH - Backhoe Bucket Inflow BDS- Bulk Disturbed Sample W - Wet F - Firm
R - Ripper F - Firm VSt - Very Stiff
EX - Excavator H - Hard H - Hard
RH - Rock Hammer VH - Very hard VL - Very Loose
Plastic Limit
L - Loose
Classification Symbols < PL MD - Medium Dense
and Soil Descriptions = PL D - Dense
Based on Unified Soil > PL VD - Very Dense
Classification System Fr - Friable
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