Groundwater Report MINYANGO PROJECT. Environmental Impact Statement. June 2013
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1 MINYANGO PROJECT Environmental Impact Statement June 2013
2 ansen Bailey Environmental Impact Statement June 2013
3 Environmental Impact Statement June 2013 ansen Bailey
4 ansen Bailey i Environmental Impact Statement June 2013
5 Figure 4.1: Generalised stratigraphy of project site Figure 5.2: Conceptual model of groundwater regime ii Environmental Impact Statement June 2013 ansen Bailey
6 Figure 7.1: Conceptual model of caving and the nature of fracturing above a mine excavation Figure 7.2: Predicted groundwater seepage to mine Figure 7.4: Groundwater drawdown and recovery in Aries and Pollux coal seams 300 years after the start of mining A1-1 Drawing 1: Regional Setting and Sites Close to the Project Drawing 2: Topography and Drainage Drawing 3: Regional Surface Geology Drawing 4: Bowen Basin Geology Drawing 5: Registered Bore Locations Drawing 6: Monitoring Bore and VWP Locations Drawing 7: Rewan Formation Piezometric Contours Drawing 8: Aries Coal Seam Piezometric Contours Drawing 9: Location of Blackwater Landfill and the Landfill Monitoring Bores Drawing 10: Mine Plan for the Aries Coal Seam (source ansen Bailey) Drawing 11: Mine Plan for the Pollux Coal Seam (source ansen Bailey) Drawing 12: Drawdown at the End of Mining in Layer 7 Aries Coal Seam Drawing 13: Drawdown at the End of Mining in Layer 11 Pollux Coal Seam ansen Bailey Environmental Impact Statement June 2013 iii
7 Table 10: AVERAGE COAL SEAM AND INTERBURDEN TICKNESSES Table 11: SUMMARY OF PERMEABILITY TESTING OF TE RANGAL COAL MEASURES AND FORT COOPER FORMATION Table 12: DEP REGISTERED WATER BORES SCREENED INTO TE PERMIAN Table 13: GROUNDWATER CEMISTRY FROM REGISTERED WATER BORES SCREENED INTO PERMIAN Table 14: WATER QUALITY SUMMARY - LANDFILL AND BACKGROUND BORES Table 15: PESTICIDE AND ERBICIDE ANALYSES (mg/l) iv Environmental Impact Statement June 2013 ansen Bailey
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49 Description / Analyte Drinking Water MB14A MB14A MB14B MB14B MB15 MB15 Guideline Date sampled - Dec-11 Aug-12 Dec-11 Aug-12 Dec-11 Aug-12 Organochlorine Pesticides (OC) alpha-bc - < < < < < < exachlorobenzene (CB) - < < < < < < beta-bc - < < < < < < gamma-bc - < < < < < < delta-bc - < < < < < < eptachlor < < < < < < Aldrin < < < < < < eptachlor epoxide < < < < < < trans-chlordane - < < < < < < alpha-endosulfan - < < < < < < cis-chlordane - < < < < < < Dieldrin < < < < < < `-DDE - < < < < < < Endrin - < < < < < < beta-endosulfan - < < < < < < `-DDD - < < < < < < Endrin aldehyde - < < < < < < Endosulfan sulfate 0.03 < < < < < < `-DDT - <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 Endrin ketone - < < < < < < Methoxychlor 0.3 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 Organophosphorus Pesticides (OP) Dichlorvos < < < < < < Demeton-S-methyl - < < < < < < Monocrotophos <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 Dimethoate 0.05 < < < < < < Diazinon < < < < < < Chlorpyrifos-methyl 0.01 < < < < < < Environmental Impact Statement June 2013 ansen Bailey
50 Description / Analyte Drinking Water Guideline MB14A MB14A MB14B MB14B MB15 MB15 Date sampled - Dec-11 Aug-12 Dec-11 Aug-12 Dec-11 Aug-12 Parathion-methyl 0.1 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 Malathion - < < < < < < Fenthion - < < < < < < Chlorpyrifos 0.01 < < < < < < Parathion 0.01 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 Pirimphos-ethyl < <0.002 < <0.002 < <0.002 Chlorfenvinphos < < < < < < Bromophos-ethyl 0.01 < < < < < < Fenamiphos < < < < < < Prothiofos - < < < < < < Ethion < < < < < < Carbophenothion < < < < < < Azinphos Methyl < < < < < < Phenoxyacetic Acid erbicides 4-Chlorophenoxy acetic acid - <0.01 <0.01 <0.01 <0.01 <0.01 < DB - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 Dicamba 0.1 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 Mecoprop - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 MCPA - <0.01 <0.01 <0.01 <0.01 <0.01 < DP - <0.01 <0.01 <0.01 <0.01 <0.01 < D - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 Triclopyr 0.01 <0.01 <0.01 <0.01 <0.01 <0.01 < TP (Silvex) - <0.01 <0.01 <0.01 <0.01 <0.01 < T - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 MCPB - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 Picloram 0.3 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 Clopyralid 1 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 Fluroxypyr - <0.01 <0.01 <0.01 <0.01 <0.01 < D - <0.01 <0.01 <0.01 <0.01 <0.01 < T - <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 ansen Bailey Environmental Impact Statement June
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52 Surface Zone: The surface fractures generally relate to panel and trough edges and the depth of cover of the extracted material. Where the longwalls occur in the shallower depth of cover (north-west of the project site) crack widths are likely to be in the order of mm and larger cracks may occur in isolated locations. This is likely to occur in the Tertiary sediments. In the south-east of the project site where the depth of cover is deeper, it is likely that surface fractures will only occur in rare instances and generally will not be present. This may occur in the Tertiary sediments and the Quaternary alluvium. It is highly unlikely that there will be any hydraulic connection between surface fractures and the fractured zone due to the depth of cover of the coal seams, geometry of proposed longwalls and geological characteristics of the project site. ansen Bailey Environmental Impact Statement June
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64 Groundwater Report ansen Bailey Environmental Impact Statement June
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67 Sublabile sandstone Sandstones in which quartz forms 75 to 90% of the clasts. 60 Environmental Impact Statement June 2013 ansen Bailey
68 Regional Setting and Sites Close to the Project ansen Bailey Environmental Impact Statement June
69 Topography and Drainage 62 Environmental Impact Statement June 2013 ansen Bailey
70 Regional Surface Geology ansen Bailey Environmental Impact Statement June
71 Bowen Basin Geology 64 Environmental Impact Statement June 2013 ansen Bailey
72 Registered Bore Locations ansen Bailey Environmental Impact Statement June
73 Monitoring Bore and VWP Locations 66 Environmental Impact Statement June 2013 ansen Bailey
74 Rewan Formation Piezometric Contours ansen Bailey Environmental Impact Statement June
75 Aries Coal Seam Piezometric Contours 68 Environmental Impact Statement June 2013 ansen Bailey
76 Location of Blackwater Landfill and the Landfill Monitoring Bores ansen Bailey Environmental Impact Statement June
77 Mine Plan for the Aries Coal Seam 70 Environmental Impact Statement June 2013 ansen Bailey
78 Mine Plan for the Pollux Coal Seam ansen Bailey Environmental Impact Statement June
79 Drawdown at the End of Mining in Layer 7 Aries Coal Seam 72 Environmental Impact Statement June 2013 ansen Bailey
80 Drawdown at the End of Mining in Layer 11 - Pollux Coal Seam ansen Bailey Environmental Impact Statement June
81 A1 Environmental Impact Statement June 2013 ansen Bailey
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83 A1-2 Environmental Impact Statement June 2013 ansen Bailey
84 Australasian Groundwater & Environmental Consultants Pty Ltd 15 Mallon St, Bowen ills, Queensland 4006 BOREOLE ID: BOREOLE LOG MB1 Page 1 of 3 PROJECT NO. G1562 DRILLER: James Warren DATUM: MGA 94 Zn 55 PROJECT NAME: Minyango DRILLING METOD: Rotary Air and Mud GROUND LEVEL: mAD DATE: 30/11/11-16/3/12 DRILL RIG: Versadrill V-2095EXP TOP OF CASING LEVEL: N/A CONTRACTOR: Depco Drilling COORDINATES: mE mN LOGGED BY: JPD Elevation Graphic Depth Lithologic Description SWL Bore Construction Bore Description Not Logged. 381mm drill hole from 0m to 6m using blade bit, with 6m of 305mm removable steel casing mm drill hole from 6m to 26 using PCD mm steel casing from 0m to 26m m depth to groundwater in Pollux Coal Seam SANDSTONE: Rewan Formation. Medium to light grey, fine grained, silty matrix between 24m and 37m, clayey matrix between 37 and 41m, fresh to slightly weathered. 29m depth to groundwater in AriesCoal Seam. 30m depth to groundwater in Rewan Formation SILTSTONE: Rewan Formation. Medium to light grey, silty matrix, slightly weathered. 251mm drill hole from 26m to 226m using PCD drill bit MUDSTONE: Rewan Formation. Light grey, fresh to slightly weathered. SANDSTONE: Rewan Formation. Light to medium grey, fine grained, silty matrix, slightly weathered. 100mm blank steel casing from 0m to 250m Cement-bentonite grout from 0m to 269.8m in annulus VWP sensor in Rewan Formation at 80m ansen Bailey Environmental Impact Statement June 2013 A1-3
85 Australasian Groundwater & Environmental Consultants Pty Ltd 15 Mallon St, Bowen ills, Queensland 4006 BOREOLE ID: BOREOLE LOG MB1 Page 2 of 3 PROJECT NO. G1562 DRILLER: James Warren DATUM: MGA 94 Zn 55 PROJECT NAME: Minyango DRILLING METOD: Rotary Air and Mud GROUND LEVEL: mAD DATE: 30/11/11-16/3/12 DRILL RIG: Versadrill V-2095EXP TOP OF CASING LEVEL: N/A CONTRACTOR: Depco Drilling COORDINATES: mE mN LOGGED BY: JPD Elevation Graphic Depth Lithologic Description SWL Bore Construction Bore Description SILTSTONE: Rewan Formation. Dark to medium grey, clayey matrix (50% clay between 156m and 163m), slightly weathered MUDSTONE/SILTSTONE: Rewan Formation. Light grey, silty matrix, 20% light grey clay, slightly weathered SILTSTONE: Rewan Formation. Medium to light grey, clayey matrix, slightly weathered to fresh MUDSTONE: Rewan Formation. Medium to light grey, clayey matrix (60% light grey clay), distinctly to slightly weathered. SANDSTONE: Rewan Formation. Medium grey, fine A1-4 Environmental Impact Statement June 2013 ansen Bailey
86 Australasian Groundwater & Environmental Consultants Pty Ltd 15 Mallon St, Bowen ills, Queensland 4006 BOREOLE ID: BOREOLE LOG MB1 Page 3 of 3 PROJECT NO. G1562 DRILLER: James Warren DATUM: MGA 94 Zn 55 PROJECT NAME: Minyango DRILLING METOD: Rotary Air and Mud GROUND LEVEL: mAD DATE: 30/11/11-16/3/12 DRILL RIG: Versadrill V-2095EXP TOP OF CASING LEVEL: N/A CONTRACTOR: Depco Drilling COORDINATES: mE mN LOGGED BY: JPD Elevation Graphic Depth Lithologic Description SWL Bore Construction Bore Description grained, silty matrix (5% light grey clay), fresh COAL: Aries Seam. Black. CARBONACEOUS SILTSTONE: Dark grey, clayey matrix. VWP sensor in Aries Coal Seam at 210.2m SANDSTONE: Medium to dark grey, fine grained, slity and clayey matrix, fresh COAL: Castor Seam. Black. No Sample Returns. Cement-bentonite grout from approximately 200m to 269.8m inside steel casing SANDSTONE: Medium grey, medium to fine grained, quartzose. SILTSTONE/SANDSTONE: Light grey, medium to coarse grained, quartzose, fresh. COAL: Pollux Seam. Black. SANDSTONE: Light grey, medium to coarse grained, quartzose, fresh. VWP sensor in Pollux Coal Seam at 243m COAL: Orion Seam? Black SILTSTONE/SANDSTONE: Grey and black, medium to coarse grained, fresh. Total depth 269.8m. ansen Bailey Environmental Impact Statement June 2013 A1-5
87 Australasian Groundwater & Environmental Consultants Pty Ltd 15 Mallon St, Bowen ills, Queensland 4006 BOREOLE ID: BOREOLE LOG MB2 Page 1 of 3 PROJECT NO. G1562 DRILLER: James Warren DATUM: MGA 94 Z 55 PROJECT NAME: Minyango DRILLING METOD: Rotary Air GROUND LEVEL: mAD DATE: 27/11/11-12/3/12 DRILL RIG: Versadrill V-2095EXP TOP OF CASING LEVEL: +0.50m CONTRACTOR: Depco Drilling COORDINATES: mE mN LOGGED BY: JPD Elevation Graphic Depth Lithologic Description SWL Bore Construction Bore Description SANDY CLAY: Dark brown, medium grained sand and top soil. SANDSTONE: Brown, medium to coarse grained, quartzose, clayey matrix, distinctly to extremely weathered, damp. MUDSTONE: Brown, silty matrix, distinctly weathered, damp. SILTSTONE: Brown, clayey matrix, slightly weathered, damp. SILTSTONE: Brown to grey, clayey matrix, slightly weathered, damp. MUDSTONE: Medium to light brown, silty matrix, distinctly to extremely weathered. 381mm drill hole from 0m to 6m using blade bit, with 6m of 305mm removable steel casing. 302mm drill hole from 6m to 24m using PCD. 254mm steel casing from 0m to 24m. 251mm drill hole from 24m to 226m using PCD MUDSTONE: Rewan Formation. Green grey, 100% clay with a silty matrix, distinctly weathered. 155 SILTSTONE: Rewan Formation. Green grey, clayey matrix (20% clay), slightly weathered SANDSTONE: Rewan Formation. Green grey, fine grained, alternating clayey and silty matrix, fresh to slightly weathered, clay content decreasing from 60% at 29m through to 5% at 41m, 15 to 40% clay between 41m and 102m mm blank steel casing from 0m to 220m Cement-bentonite grout from 0m to 217m A1-6 Environmental Impact Statement June 2013 ansen Bailey
88 Australasian Groundwater & Environmental Consultants Pty Ltd 15 Mallon St, Bowen ills, Queensland 4006 BOREOLE ID: BOREOLE LOG MB2 Page 2 of 3 PROJECT NO. G1562 DRILLER: James Warren DATUM: MGA 94 Z 55 PROJECT NAME: Minyango DRILLING METOD: Rotary Air GROUND LEVEL: mAD DATE: 27/11/11-12/3/12 DRILL RIG: Versadrill V-2095EXP TOP OF CASING LEVEL: +0.50m CONTRACTOR: Depco Drilling COORDINATES: mE mN LOGGED BY: JPD Elevation Graphic Depth Lithologic Description SWL Bore Construction Bore Description SILTSTONE: Rewan Formation. Dark grey brown, no clay or silt in the matrix, slightly weathered and some carbonaceous sediment present. SANDSTONE: Rewan Formation. Green grey, fine grained, alternating clayey and silty matrix, fresh to slightly weathered, clay content varying between 10% and 40% SANDSTONE: Rewan Formation. Dark grey black, fine grained, silty and clayey matrix with 15% to 30% clay, slightly weathered to fresh ansen Bailey Environmental Impact Statement June 2013 A1-7
89 Australasian Groundwater & Environmental Consultants Pty Ltd 15 Mallon St, Bowen ills, Queensland 4006 BOREOLE ID: BOREOLE LOG MB2 Page 3 of 3 PROJECT NO. G1562 DRILLER: James Warren DATUM: MGA 94 Z 55 PROJECT NAME: Minyango DRILLING METOD: Rotary Air GROUND LEVEL: mAD DATE: 27/11/11-12/3/12 DRILL RIG: Versadrill V-2095EXP TOP OF CASING LEVEL: +0.50m CONTRACTOR: Depco Drilling COORDINATES: mE mN LOGGED BY: JPD Elevation Graphic Depth Lithologic Description SWL Bore Construction Bore Description SANDSTONE: Rewan Formation. Dark to medium grey, fine grained, silty matrix with 15% clay, fresh to slightly weathered Bentonite seal from 216m to 217m (2 x 23kg buckets) CARBONACEOUS SANDSTONE: Rewan Formation. Medium grey black, fine grained, silty matrix with 5% clay, slightly weathered. COAL: Aries Seam. Black. Gravel pack (5mm) from 218m to 226m (30 x 20kg bags). 100mm slotted steel casing from 220 to 226m CARBONACEOUS SILTSTONE: Dark grey black, 5% clay. Total depth 226m A1-8 Environmental Impact Statement June 2013 ansen Bailey
90 Australasian Groundwater & Environmental Consultants Pty Ltd 15 Mallon St, Bowen ills, Queensland 4006 BOREOLE ID: BOREOLE LOG MB3 (Filled In) Page 1 of 1 PROJECT NO. G1562 DRILLER: James Warren DATUM: MGA 94 Z 55 PROJECT NAME: Minyango DRILLING METOD: Rotary Air GROUND LEVEL: 204mAD DATE: 26/11/11-30/11/11 DRILL RIG: Versadrill V-2095EXP TOP OF CASING LEVEL: +0.45m CONTRACTOR: Depco Drilling COORDINATES: mE mN LOGGED BY: JPD Elevation Graphic Depth Lithologic Description SWL Bore Construction Bore Description SANDY CLAY: Duaringa Formation. Brown and mottled light grey clay with fine to coarse grained sand. SANDSTONE: Duaringa Formation. Orange brown, fine to coarse grained, moderately weathered, weakly consolidated. SILTSTONE: Rewan Formation. Light green brown, clayey matrix (50% clay), slightly weathered. MUDSTONE: Rewan Formation. Dark brown, silty matrix, distinctly weathered. Galvinsed steel monument 1.02m above ground level set into a 0.5m x 0.5m concrete pad. 143mm (5 5/8 inch) drill hole from 0m to 65m using a roller bit SANDSTONE: Rewan Formation. Light grey green, fine grained, clayey matrix (40% clay), slightly weathered. SILTSTONE: Rewan Formation. Light grey, green and brown, clayey matrix (20-40% clay), slightly to distinctly weathered. SANDSTONE: Rewan Formation. Brown, fine grained, clayey matrix, distinctly to extremely weathered. Looks like a water bearing zone. SILTSTONE: Rewan Formation. Brown, clayey matrix, distinctly weathered. SANDSTONE: Rewan Formation. Light brown orange, medium grained, clayey matrix, distinctly weathered. Looks like a water bearing zone. SILTSTONE: Rewan Formation. Light brown, silty matrix, slightly to distinctly weathered. SANDSTONE: Rewan Formation. Light grey green, medium grained, clayey matrix, fresh to slightly weathered. 50mm ID, 60mm OD class 18 upvc blank casing from 0m to 58.5m. Cement-bentonite grout from 0m to 54m SILTSTONE: Rewan Formation. Brown, clayey matrix, distinctly weathered. Looks like a water bearing zone SANDSTONE: Rewan Formation. Light grey green, fine to medium grained, silty matrix, fresh. SANDSTONE: Rewan Formation. Brown, fine to medium grained, silty matrix, distinctly weathered. SANDSTONE: Rewan Formation. Light grey green, fine to medium grained, silty matrix, fresh. SANDSTONE: Rewan Formation. Brown, fine to medium grained, silty matrix, distinctly weathered. SANDSTONE: Rewan Formation. Light grey green, fine to medium grained, silty matrix, fresh. Damp from 55m to 61m and moist from 61m to 65m. Bentonite seal from 54m to 56m (2 x 23kg buckets). Gravel pack (5mm) from 56m to 64.5m (9 x 20kg bags). 50mm ID, 60mm OD class 18 upvc 1mm slotted casing from 58.5m to 64.5m. First water cut at 61m. 50mm PVC end cap. Fall back from 64.5m to 65m. At 65m. Airlift < 0.01 L/s. EC - > 26,000 us/cm, Temp oc. Total depth 65m. ansen Bailey Environmental Impact Statement June 2013 A1-9
91 Australasian Groundwater & Environmental Consultants Pty Ltd BOREOLE LOG 15 Mallon St, Bowen ills, Queensland 4006 BOREOLE ID: MB3R Page 1 of 1 PROJECT NO. G1562 DRILLER: Chris DATUM: MGA 94 Z 55 PROJECT NAME: Minyango DRILLING METOD: Rotary Air GROUND LEVEL: 204mAD DATE: 14/3/12-15/3/12 DRILL RIG: Versadrill V-2095EXP TOP OF CASING LEVEL: Approx +0.8m CONTRACTOR: Depco Drilling COORDINATES: mE mN LOGGED BY: JPD Elevation Graphic Depth Lithologic Description SWL Bore Construction Bore Description SANDY CLAY: Duaringa Formation. Brown and mottled light grey clay with fine to coarse grained sand. 200 SANDSTONE: Duaringa Formation. Orange brown, fine to coarse grained, slightly weathered, weakly consolidated SILTSTONE: Duaringa Formation. Orange brown, fine to coarse grained sand present, light grey clay and mottling, moderate to extremely weathered, weakly consolidated. MUDSTONE: Rewan Formation. Red / brown iron stained, clayey matrix (50% clay), slightly weathered. 143mm (5 5/8 inch) drill hole from 0m to 65m using a roller bit MUDSTONE: Rewan Formation. Alternating light grey and red brown iron stained layers, silty matrix, slightly to distinctly weathered SILTSTONE: Rewan Formation. Alternating light grey and red brown iron stained layers, clayey matrix, slightly weathered to fresh. 50mm ID, 60mm OD, class 18 upvc blank casing from 0m to 59m. 170 SILTSTONE: Rewan Formation. Alternating light grey and red brown iron stained layers, minor clay matrix, slightly weathered to fresh SANDSTONE: Rewan Formation. Light grey, very fine grained, fresh. Cement-bentonite grout from 0m to 49m. 160 SILTSTONE: Rewan Formation. Light grey, fresh SILTSTONE/SANDSTONE: Rewan Formation. Light grey, very fine grained, fresh. Drilling cuttings from 49m to 54.2m. 150 Bentonite seal from 54.2m to 56.7m (2 x 23kg buckets). Gravel pack (5mm) from 56.7m to 59m (8 x 20kg bags) mm ID, 60mm OD, class 18 upvc 1mm slotted casing from 59m to 65m. No groundwater inflow when drilling but hole was damp at the end of drilling. 50mm PVC end cap. At 65m. No water returns when airlifted. A1-10 Environmental Impact Statement June 2013 ansen Bailey
92 Australasian Groundwater & Environmental Consultants Pty Ltd 15 Mallon St, Bowen ills, Queensland 4006 BOREOLE ID: BOREOLE LOG MB4 Page 1 of 1 PROJECT NO. G1562 DRILLER: James Warren DATUM: MGA 94 Z 55 PROJECT NAME: Minyango DRILLING METOD: Rotary Air GROUND LEVEL: mAD DATE: 26/11/11-30/11/11 DRILL RIG: Versadrill V-2095EXP TOP OF CASING LEVEL: +1.05m CONTRACTOR: Depco Drilling COORDINATES: mE mN LOGGED BY: JPD Elevation Graphic Depth Lithologic Description SWL Bore Construction Bore Description CLAY: Dark brown, minor topsoil present. Galvinsed steel monument 1.15m above ground level set into a 0.5m x 0.5m concrete pad. CLAY AND SAND: Black brown clay with fine to coarse grained sand. SILTSTONE: Rewan Formation. Grey, very high strength, slightly weathered. 143mm (5 5/8 inch) drill hole from 0m to 33m using a roller bit. 170 MUDSTONE: Rewan Formation. Brown, fine to medium grained sandy matrix, extremely weathered. 50mm ID, 60mm OD, class 18 upvc blank casing from 0m to 27m. SILTSTONE: Rewan Formation. Brown, silty and clayey matrix, slightly weathered SANDSTONE: Rewan Formation. Grey green, fine grained, silty matrix, fresh. Cement-bentonite grout from 0m to 23m SILTSTONE: Rewan Formation. Grey green, silty matrix from 22m to 23m, fresh, clayey matrix from 23m to 24m (50% clay), slightly weathered. SANDSTONE: Rewan Formation. Grey green, fine to medium grained, silty and clayey matrix, fresh to slightly weathered. Bentonite seal from 23m to 25.2m (2 x 23kg buckets). Gravel pack (5mm) from 25.2m to 33m (7 x 20kg bags) SANDSTONE: Rewan Formation. Grey green, fine to medium grained, clayey matrix (80% grey clay), slightly to distinctly weathered. SANDSTONE: Rewan Formation. Grey green, fine to medium grained, clayey matrix (10% grey clay), fresh to slightly weathered. First water cut at 29m. EC - 17,200 us/cm, Temp oc 50mm ID, 60mm OD, class 18 upvc 1mm slotted casing from 27m to 33m. 50mm PVC end cap. 33m. Airlift < 0.01L/s. Total depth 33m. ansen Bailey Environmental Impact Statement June 2013 A1-11
93 Australasian Groundwater & Environmental Consultants Pty Ltd BOREOLE LOG 15 Mallon St, Bowen ills, Queensland 4006 BOREOLE ID: MB5 Page 1 of 1 PROJECT NO. G1562 DRILLER: James Warren DATUM: MGA 94 Z 55 PROJECT NAME: Minyango DRILLING METOD: Rotary Air GROUND LEVEL: mAD DATE: 25/11/11-30/11/11 DRILL RIG: Versadrill V-2095EXP TOP OF CASING LEVEL: +1.03m CONTRACTOR: Depco Drilling COORDINATES: mE mN LOGGED BY: JPD Elevation Graphic Depth Lithologic Description SWL Bore Construction Bore Description CONGLOMERATE: Rewan Formation. Brown, coarse grained sand and fine grained quartzose gravel, distinctly weathered. Galvinsed steel monument 1.15m above ground level set into a 0.5m x 0.5m concrete pad. 190 SILTSTONE: Rewan Formation. Light brown, clayey matrix, slightly weathered. SANDSTONE: Rewan Formation. Yellow, red brown, fine grained, clayey matrix, slightly weathered. 143mm (5 5/8 inch) drill hole from 0m to 47m using a blade bit SILTSTONE: Rewan Formation. Dark brown, clayey matrix (60% clay), fine grained, distinctly weathered. 180 MUDSTONE/SILTSTONE: Rewan Formation. Medium brown, clayey matrix (10% clay), fine grained, slightly weathered. SANDSTONE: Rewan Formation. Light grey, fine grained, trace clayey matrix, fresh to slightly weathered. More weathering between 17.5m and 18.5m. 50mm ID, 60mm OD, class 18 upvc blank casing from 0m to 42m SILTSTONE: Rewan Formation. Dark brown, distinctly weathered. SANDSTONE: Rewan Formation. Light grey brown, fine grained, fresh to slightly weathered. 170 SILTSTONE: Rewan Formation. Dark brown, distinctly weathered. SANDSTONE: Rewan Formation. Light grey, fine grained, silty matrix, fresh. Cement-bentonite grout from 0m to 38m MUDSTONE: Rewan Formation. Light grey, silty matrix, fresh to slightly weathered SANDSTONE: Rewan Formation. Light grey, from 35m to 43m, silty matrix and fresh, from 43m to 47m clayey matrix (40-70% clay) and slightly weathered. Bentonite seal from 38m to 40m (2 x 23kg buckets). Gravel pack (5mm) from 40m to 47m (7.5 x 20kg bags) mm ID, 60mm OD, class 18 upvc 1mm slotted casing from 42m to 45m. 45m. Airlift - < 0.01L/s. EC - 22,600 us/cm, Temp oc. 50mm PVC end cap First water cut at 47m. Total depth 47m. A1-12 Environmental Impact Statement June 2013 ansen Bailey
94 Australasian Groundwater & Environmental Consultants Pty Ltd 15 Mallon St, Bowen ills, Queensland 4006 BOREOLE ID: BOREOLE LOG MB6 Page 1 of 1 PROJECT NO. G1562 DRILLER: James Warren DATUM: MGA 94 Z 55 PROJECT NAME: Minyango DRILLING METOD: Rotary Air GROUND LEVEL: mAD DATE: 24/11/11-30/11/11 DRILL RIG: Versadrill V-2095EXP TOP OF CASING LEVEL: +1.3m CONTRACTOR: Depco Drilling COORDINATES: mE mN LOGGED BY: JPD Elevation Graphic Depth Lithologic Description SWL Bore Construction Bore Description 0 SANDY CLAY: Alluvium. Red brown fine to coarse grained sandy clay. Galvinsed steel monument 1.15m above ground level set into a 0.5m x 0.5m concrete pad. 175 CLAY: Alluvium. Dark red brown clay with minor fine to medium grained sand. 210mm (8 1/4 inch) drill hole from 0m to 19m using a roller bit SANDY CLAY: Alluvium. Medium to light brown fine grained sandy clay. CLAYEY SAND: Alluvium. Medium to light brown clayey fine grained sandy. GRAVELLY SAND: Alluvium. Coarse grained sand and medium grained sub-rounded to sub-angular gravel, 40% quartzose mm ID class 18 upvc blank casing from 0m to 18m. 8.5m. First water cut. 165 SAND: Alluvium. Light to medium brown medium to coarse grained sand (60% is quartzose). First water cut at 8.5m. Cement-bentonite grout from 0m to 26.4m SILTSTONE/SANDSTONE: Rewan Formation. Light grey brown, silty matrix, fresh to slightly weathered, trace clay. SILTSTONE/SANDSTONE: Rewan Formation. Light grey brown, clayey matrix, slightly weathered zone between 19m and 21m with 90% clay, and slightly weathered zone between 23m and 24m with 40% clay. The remaining zones have between 5% and 20% clay and are fresh. 17m. Airlift - 0.3L/s. EC - 5,060 us/cm, p , Temp oc. 50mm ID, 60mm OD, class 18 upvc blank casing from 0m to 32m. 150 Bentonite seal from 26.4m to 29m (2 x 23kg buckets) m. Airlift - 0.3L/s. EC - 8,690 us/cm, p , Temp oc Gravel pack (5mm) from 29m to 41m (13 x 20kg bags). 50mm ID, 60mm OD, class 18 upvc 1mm slotted casing from 32m to 41m. 35m. Airlift - 0.3L/s. EC - 13,010 us/cm, p , Temp oc. 41m. Airlift - 0.3L/s. EC - 13,990 us/cm, p , Temp oc. 50mm PVC end cap. 135 Total depth 41m. ansen Bailey Environmental Impact Statement June 2013 A1-13
95 Australasian Groundwater & Environmental Consultants Pty Ltd 15 Mallon St, Bowen ills, Queensland 4006 BOREOLE ID: BOREOLE LOG MB7 Page 1 of 4 PROJECT NO. G1562 DRILLER: Chris DATUM: MGA 94 Z 55 PROJECT NAME: Minyango DRILLING METOD: Rotary Air and Mud GROUND LEVEL: 203mAD DATE: 9/4/12 (VWP's installed) DRILL RIG: Versadrill V-2095EXP TOP OF CASING LEVEL: N/A CONTRACTOR: Depco Drilling COORDINATES: mE mN LOGGED BY: Mike (IMC) Elevation Graphic Depth Lithologic Description SWL Bore Construction Bore Description MUDSTONE: Duaringa Formation. Brown, silty matrix, distinctly weathered. MUDSTONE: Duaringa Formation. Grey, orange, red, silty and sandy matrix, distinctly weathered. 381mm drill hole from 0m to 5m SANDSTONE: Duaringa Formation. Grey, orange, red, clayey matrix, distinctly weathered, grey clay and some mottling, quartz sandstone. MUDSTONE: Rewan Formation. Brown and red brown, silty matrix, distinctly weathered, iron oxide staining. SILTSTONE: Rewan Formation. Red brown, silty matrix, distinctly weathered, iron oxide staining. MUDSTONE: Rewan Formation. Red brown, silty matrix, distinctly weathered, iron oxide staining. 304mm drill hole from 5m to 48m. 254mm steel casing from 0m to 48m. 33m depth to groundwater in Aries Coal Seam SILTSTONE: Rewan Formation. Grey and red brown, silty matrix, slightly to distinctly weathered, minor iron oxide staining. SANDSTONE: Rewan Formation. Grey green, fine grained, silty matrix, fresh. SILTSTONE: Rewan Formation. Red brown, silty matrix, distinctly weathered, iron oxide staining. SANDSTONE: Rewan Formation. Grey green, fine grained, silty matrix, fresh. SILTSTONE: Rewan Formation. Red brown, clayey matrix, slightly weathered, iron oxide staining. 40m depth to groundwater in Castor Coal Seam. 251mm drill hole from 48m to 434m SILTSTONE: Rewan Formation. Grey, fresh. SANDSTONE: Rewan Formation. Grey, very fine grained, damp from 63m, fresh mm blank steel casing from 0m to approximately 430m A1-14 Environmental Impact Statement June 2013 ansen Bailey
96 Australasian Groundwater & Environmental Consultants Pty Ltd 15 Mallon St, Bowen ills, Queensland 4006 BOREOLE ID: BOREOLE LOG MB7 Page 2 of 4 PROJECT NO. G1562 DRILLER: Chris DATUM: MGA 94 Z 55 PROJECT NAME: Minyango DRILLING METOD: Rotary Air and Mud GROUND LEVEL: 203mAD DATE: 9/4/12 (VWP's installed) DRILL RIG: Versadrill V-2095EXP TOP OF CASING LEVEL: N/A CONTRACTOR: Depco Drilling COORDINATES: mE mN LOGGED BY: Mike (IMC) Elevation Graphic Depth Lithologic Description SWL Bore Construction Bore Description 80 Cement-bentonite grout from 0m to 434m in annulus SILTSTONE: Rewan Formation. Grey, fresh SANDSTONE: Rewan Formation. Grey, silty matrix, very fine to medium grained, interbeded sands and silts, fresh. ansen Bailey Environmental Impact Statement June 2013 A1-15
97 Australasian Groundwater & Environmental Consultants Pty Ltd 15 Mallon St, Bowen ills, Queensland 4006 BOREOLE ID: BOREOLE LOG MB7 Page 3 of 4 PROJECT NO. G1562 DRILLER: Chris DATUM: MGA 94 Z 55 PROJECT NAME: Minyango DRILLING METOD: Rotary Air and Mud GROUND LEVEL: 203mAD DATE: 9/4/12 (VWP's installed) DRILL RIG: Versadrill V-2095EXP TOP OF CASING LEVEL: N/A CONTRACTOR: Depco Drilling COORDINATES: mE mN LOGGED BY: Mike (IMC) Elevation Graphic Depth Lithologic Description SWL Bore Construction Bore Description COAL: Aries Seam. Black. VWP sensor in Aries Coal Seam at 335m SANDSTONE: Grey, fine to medium grained, silty matrix, interbeded sands and silts, fresh A1-16 Environmental Impact Statement June 2013 ansen Bailey
98 Australasian Groundwater & Environmental Consultants Pty Ltd 15 Mallon St, Bowen ills, Queensland 4006 BOREOLE ID: BOREOLE LOG MB7 Page 4 of 4 PROJECT NO. G1562 DRILLER: Chris DATUM: MGA 94 Z 55 PROJECT NAME: Minyango DRILLING METOD: Rotary Air and Mud GROUND LEVEL: 203mAD DATE: 9/4/12 (VWP's installed) DRILL RIG: Versadrill V-2095EXP TOP OF CASING LEVEL: N/A CONTRACTOR: Depco Drilling COORDINATES: mE mN LOGGED BY: Mike (IMC) Elevation Graphic Depth Lithologic Description SWL Bore Construction Bore Description COAL: Castor Seam. Black. SANDSTONE: Grey and black, silty matrix, fine to medium grained, interbeded sands and silts, fresh. VWP sensor in Castor Coal Seam at 399m No Sample Returns SANDSTONE: Grey, fresh No Sample Returns. Total depth 434m SANDSTONE: Grey, fresh. ansen Bailey Environmental Impact Statement June 2013 A1-17
99 Australasian Groundwater & Environmental Consultants Pty Ltd 15 Mallon St, Bowen ills, Queensland 4006 BOREOLE ID: BOREOLE LOG MB8 Page 1 of 4 PROJECT NO. G1562 DRILLER: Chris DATUM: MGA 94 Z 55 PROJECT NAME: Minyango DRILLING METOD: Rotary Air and Mud GROUND LEVEL: 180mAD DATE: 30/5/12 (VWP's installed) DRILL RIG: Versadrill V-2095EXP TOP OF CASING LEVEL: N/A CONTRACTOR: Depco Drilling COORDINATES: mE mN LOGGED BY: Leo (IMC) Elevation Graphic Depth Lithologic Description SWL Bore Construction Bore Description MUDSTONE: Rewan Formation. Light brown, distinctly weathered. 381mm drill hole from 0m to 5m SILTSTONE: Rewan Formation. Light brown, slightly weathered. 304mm drill hole from 5m to 53m SANDSTONE: Rewan Formation. Light grey, fine to medium grained, fresh. 254mm steel casing from 0m to 53m m depth to groundwater in Aries Coal Seam m depth to groundwater in Pollux Coal Seam. 135 MUDSTONE: Rewan Formation. Dark red, fresh SILTSTONE: Rewan Formation. Light grey, fresh SANDSTONE: Rewan Formation. Light and dark grey, fine grained, fresh. 251mm drill hole from 48m to 438m mm blank steel casing from 0m to approximately 438m CARBONACEOUS SILTSTONE: Rewan Formation. Dark grey, fresh. 85 SILTSTONE: Rewan Formation. Grey, fresh SANDSTONE: Rewan Formation. Grey, fine grained, fresh CARBONACEOUS SILTSTONE: Rewan Formation. Dark grey, fresh SANDSTONE: Rewan Formation. Light grey, fine grained, fresh. A1-18 Environmental Impact Statement June 2013 ansen Bailey
100 Australasian Groundwater & Environmental Consultants Pty Ltd 15 Mallon St, Bowen ills, Queensland 4006 BOREOLE ID: BOREOLE LOG MB8 Page 2 of 4 PROJECT NO. G1562 DRILLER: Chris DATUM: MGA 94 Z 55 PROJECT NAME: Minyango DRILLING METOD: Rotary Air and Mud GROUND LEVEL: 180mAD DATE: 30/5/12 (VWP's installed) DRILL RIG: Versadrill V-2095EXP TOP OF CASING LEVEL: N/A CONTRACTOR: Depco Drilling COORDINATES: mE mN LOGGED BY: Leo (IMC) Elevation Graphic Depth Lithologic Description SWL Bore Construction Bore Description 55 CARBONACEOUS SILTSTONE: Rewan Formation. Dark grey, fresh. Cement-bentonite grout from 0m to 438m in annulus SANDSTONE: Rewan Formation. Light grey, fine grained, fresh. 45 CARBONACEOUS SILTSTONE: Rewan Formation. Dark grey, fresh SANDSTONE: Rewan Formation. Light grey, fine grained, fresh. 35 SILTSTONE: Rewan Formation. Grey, fresh SANDSTONE: Rewan Formation. Light grey, fine grained, fresh. 25 CARBONACEOUS SILTSTONE: Rewan Formation. Dark grey, fresh SANDSTONE: Rewan Formation. Light grey, fine to medium grained, fresh CARBONACEOUS MUDSTONE: Rewan Formation. Dark grey, fresh. SANDSTONE: Rewan Formation. Light grey, fine to medium grained, fresh. CARBONACEOUS MUDSTONE: Rewan Formation. Dark grey, fresh. SANDSTONE: Rewan Formation. Light grey, fine grained, fresh CARBONACEOUS MUDSTONE: Rewan Formation. Dark grey, fresh SILTSTONE: Rewan Formation. Light grey, fresh. -25 CARBONACEOUS MUDSTONE: Rewan Formation. Dark grey, fresh SANDSTONE: Rewan Formation. Light grey, fine grained, fresh. -35 CARBONACEOUS MUDSTONE: Rewan Formation. Dark grey, fresh SILTSTONE: Rewan Formation. Light grey, fresh. -45 CARBONACEOUS SILTSTONE: Rewan Formation. Dark grey, fresh SANDSTONE: Rewan Formation. Light grey, fine grained, fresh CARBONACEOUS SILTSTONE: Rewan Formation. Dark grey, fresh. SILTSTONE: Rewan Formation. Light grey, fresh. ansen Bailey Environmental Impact Statement June 2013 A1-19
101 Australasian Groundwater & Environmental Consultants Pty Ltd 15 Mallon St, Bowen ills, Queensland 4006 BOREOLE ID: BOREOLE LOG MB8 Page 3 of 4 PROJECT NO. G1562 DRILLER: Chris DATUM: MGA 94 Z 55 PROJECT NAME: Minyango DRILLING METOD: Rotary Air and Mud GROUND LEVEL: 180mAD DATE: 30/5/12 (VWP's installed) DRILL RIG: Versadrill V-2095EXP TOP OF CASING LEVEL: N/A CONTRACTOR: Depco Drilling COORDINATES: mE mN LOGGED BY: Leo (IMC) Elevation Graphic Depth Lithologic Description SWL Bore Construction Bore Description -65 CARBONACEOUS SILTSTONE: Rewan Formation. Dark grey, fresh SANDSTONE: Rewan Formation. Light grey, fine grained, fresh CARBONACEOUS SILTSTONE: Rewan Formation. Dark grey, fresh. SANDSTONE: Rewan Formation. Light grey, very fine grained, fresh. SILTSTONE: Rewan Formation. Light grey, fresh CARBONACEOUS SILTSTONE: Rewan Formation. Dark grey, fresh SILTSTONE: Rewan Formation. Light grey, fresh SANDSTONE: Rewan Formation. Light grey, fine grained, fresh. CARBONACEOUS MUDSTONE: Rewan Formation. Dark grey, fresh SILTSTONE: Rewan Formation. Light grey, fresh SANDSTONE: Rewan Formation. Light grey, fine grained, fresh COAL: Aries Seam. Black. SANDSTONE: Light grey, fine grained, fresh. VWP sensor in Aries Coal Seam at 356m. A1-20 Environmental Impact Statement June 2013 ansen Bailey
102 Australasian Groundwater & Environmental Consultants Pty Ltd 15 Mallon St, Bowen ills, Queensland 4006 BOREOLE ID: BOREOLE LOG MB8 Page 4 of 4 PROJECT NO. G1562 DRILLER: Chris DATUM: MGA 94 Z 55 PROJECT NAME: Minyango DRILLING METOD: Rotary Air and Mud GROUND LEVEL: 180mAD DATE: 30/5/12 (VWP's installed) DRILL RIG: Versadrill V-2095EXP TOP OF CASING LEVEL: N/A CONTRACTOR: Depco Drilling COORDINATES: mE mN LOGGED BY: Leo (IMC) Elevation Graphic Depth Lithologic Description SWL Bore Construction Bore Description CARBONACEOUS SILTSTONE: Dark grey, fresh SANDSTONE: Light grey, fine grained, fresh. COAL: Castor Seam. Black. SILTSTONE: Light grey, fresh CARBONACEOUS MUDSTONE: Dark grey, fresh SANDSTONE: Light grey, fine grained, fresh CARBONACEOUS SILTSTONE: Dark grey, fresh. SANDSTONE: Light grey, fine to medium grained, fresh CARBONACEOUS MUDSTONE: Dark grey, fresh. COAL: Pollux Upper Seam. Black. CARBONACEOUS MUDSTONE: Dark grey, fresh. VWP sensor in Castor Coal Seam at 425m COAL: Pollux Lower Seam. Black SANDSTONE: Light grey, fine grained, fresh. Total depth 438m ansen Bailey Environmental Impact Statement June 2013 A1-21
103 Australasian Groundwater & Environmental Consultants Pty Ltd 15 Mallon St, Bowen ills, Queensland 4006 BOREOLE ID: BOREOLE LOG MB9 Page 1 of 1 PROJECT NO. G1562 DRILLER: James Warren DATUM: MGA 94 Z 55 PROJECT NAME: Minyango DRILLING METOD: Rotary Air GROUND LEVEL: mAD DATE: 25/11/11-30/11/11 DRILL RIG: Versadrill V-2095EXP TOP OF CASING LEVEL: +1.22m CONTRACTOR: Depco Drilling COORDINATES: mE mN LOGGED BY: JPD Elevation Graphic Depth Lithologic Description SWL Bore Construction Bore Description SILTY CLAY: Alluvium. Dark brown silty clay, damp. Galvinsed steel monument 1.25m above ground level set into a 0.5m x 0.5m concrete pad. Cement-bentonite grout from 0m to 5.6m. CLAYEY SILT: Alluvium. Red brown clayey silt, damp. 143mm (5 5/8") drill hole from 0m to 13m using a blade bit. 50mm ID, 60mm OD, class 18 upvc blank casing from 0m to 8.5m. 175 SAND: Alluvium. Fine to coarse grained sand (50 to 70% quartzose), damp. Bentonite seal from 5.6m to 6.3m (2 x 23kg buckets). Gravel pack (5mm) from 6.3m to 11.5m (9 x 20kg bags) mm ID, 60mmOD, class 18 upvc 1mm slotted casing from 8.5m to 11.5m. CLAYEY SAND: Alluvium. Medium to light brown gravelly sand. Sand is fine to coarse grained (50 to 70% quartzose), and the gravel is fine grained, damp. 50mm PVC end cap. SILTSTONE/SANDSTONE: Rewan Formation. Red brown, fine grained, distinctly weathered, damp. Fallback from 11.5m to 13m. Total depth 13m. 165 A1-22 Environmental Impact Statement June 2013 ansen Bailey
104 Australasian Groundwater & Environmental Consultants Pty Ltd 15 Mallon St, Bowen ills, Queensland 4006 BOREOLE ID: BOREOLE LOG MB10 Page 1 of 1 PROJECT NO. G1562 DRILLER: James Warren DATUM: mAD PROJECT NAME: Minyango DRILLING METOD: Rotary Air GROUND LEVEL: Dry DATE: 25/11/11-30/11/11 DRILL RIG: Versadrill V-2095EXP TOP OF CASING LEVEL: +1.02m CONTRACTOR: Depco Drilling COORDINATES: mE mN LOGGED BY: JPD Elevation Graphic Depth Lithologic Description SWL Bore Construction Bore Description Galvinsed steel monument 1.0m above ground level set into a 0.5m x 0.5m concrete pad. 0 SANDY CLAY: Alluvium. Red brown silty and fine grained sandy clay. Cement-bentonite grout from 0m to 1.8m. CLAY: Alluvium. Dark red brown clay with minor fine to coarse grained sand. 50mm ID, 60mm OD, class 18 upvc blank casing from 0m to 5.5m. 175 CLAYEY SAND: Alluvium. Medium to light brown clayey fine to medium grained sand. Bentonite seal from 1.8m to 3.6m (2 x 23kg buckets). 143mm (5 5/8") drill hole from 0m to 9m using a blade bit. Gravel pack (5mm) from 3.6m to 8.5m (10 x 20kg bags). GRAVELLY SAND: Alluvium. Medium to light brown gravelly sand. Sand is fine to coarse grained (50 to 70% quartzose), and the gravel is fine grained mm ID, 60mm OD, class 18 upvc 1mm slotted casing from 5.5m to 8.5m. SAND & GRAVEL: Alluvium. Brown sandy fine grained gravel. 50mm PVC end cap. Fallback from 8.5m to 9m. Total depth 9m. 10 ansen Bailey Environmental Impact Statement June 2013 A1-23
105 Australasian Groundwater & Environmental Consultants Pty Ltd BOREOLE LOG 15 Mallon St, Bowen ills, Queensland 4006 BOREOLE ID: MB11 Page 1 of 1 PROJECT NO. G1562 DRILLER: James Warren DATUM: MGA 94 Z 55 PROJECT NAME: Minyango DRILLING METOD: Rotary Air GROUND LEVEL: mAD DATE: 23/11/11-30/11/11 DRILL RIG: Versadrill V-2095EXP TOP OF CASING LEVEL: +1.03m CONTRACTOR: Depco Drilling COORDINATES: mE mN LOGGED BY: JPD Elevation Graphic Depth Lithologic Description SWL Bore Construction Bore Description SANDSTONE: Duaringa Formation. Brown with a white coating of clay, fine grained, clayey matrix, distinctly to extremely weathered. Minor topsoil present. Galvinsed steel monument 1.05m above ground level set into a 0.5m x 0.5m concrete pad. 195 MUDSTONE: Duaringa Formation. Red brown, clayey matrix with a high clay content, extremely weathered SANDSTONE: Duaringa Formation. Light to medium brown, fine to coarse grained, silty matrix, distinctly weathered quartzose sand. 143mm (5 5/8 inch) drill hole from 0m to 65m using a blade bit. 185 MUDSTONE: Duaringa Formation. Medium brown, silty matrix, slightly weathered SILTSTONE/SANDSTONE: Rewan Formation. Dark brown, clayey matrix (50% clay), distinctly to extremely weathered. SILTSTONE/SANDSTONE: Rewan Formation. Light grey green, fine to medium grained, silty matrix, slightly weathered with increased silt between 22m and 23m. 50mm ID, 60mm OD, class 18 upvc blank casing from 0m to 43.7m. 175 SILTSTONE/SANDSTONE: Rewan Formation. Dark brown, fine to medium grained, silty matrix (increased silt), distinctly weathered SILTSTONE/SANDSTONE: Rewan Formation. Light grey, fine to medium grained, silty matrix, fresh. Cement-bentonite grout from 0m to 40.5m SILTSTONE/SANDSTONE: Rewan Formation. Dark brown, fine to medium grained, silty matrix, slightly to distinctly weathered. SILTSTONE/SANDSTONE: Rewan Formation. Light grey brown, silty matrix, fresh to slightly weathered. Bentonite seal from 40.5m to 42.5m (1.5 x 23kg buckets). First water cut at 41m. Increasing water from 41m to 47m. Gravel pack (5mm) from 42.5m to 52.7m (10 x 20kg bags). At 47m. Airlift 0.01 L/s. EC - 26,060 us/cm, p , Temp oc. 50mm ID, 60mm OD, class 18 upvc 1mm slotted casing from 43.7m to 52.7m. At 52.7m. Airlift 0.01 L/s. EC - > 26,000 us/cm, p , Temp oc. 50mm PVC end cap. Total depth 53m. A1-24 Environmental Impact Statement June 2013 ansen Bailey
106 Australasian Groundwater & Environmental Consultants Pty Ltd 15 Mallon St, Bowen ills, Queensland 4006 BOREOLE ID: BOREOLE LOG MB12 Page 1 of 1 PROJECT NO. G1562 DRILLER: James Warren DATUM: MGA 94 Z 55 PROJECT NAME: Minyango DRILLING METOD: Rotary Air GROUND LEVEL: mAD DATE: 26/11/11-30/11/11 DRILL RIG: Versadrill V-2095EXP TOP OF CASING LEVEL: +1.26m CONTRACTOR: Depco Drilling COORDINATES: mE mN LOGGED BY: JPD Elevation Graphic Depth Lithologic Description SWL Bore Construction Bore Description Galvinsed steel monument 1m above ground level set into a 0.5m x 0.5m concrete pad. 0 SILTY CLAY: Alluvium. Dark brown silty clay, damp. Cement-bentonite grout from 0m to 3.2m mm (5 5/8 inch) drill hole from 0m to 10.5m using a blade bit. 50mm ID, 60mm OD, class 18 upvc blank casing from 0m to 7m. Bentonite seal from 3.2m to 4.2m (1 x 23kg buckets). SILTY SANDY CLAY: Alluvium. Yellow, brown, light grey mottling, silty, fine grained sandy clay. Gravel pack (5mm) from 4.2m to 10m (5 x 20kg bags). 160 SANDY CLAY: Alluvium. Light brown and grey fine grained sandy clay. CLAY AND SAND: Alluvium. Light brown clay and fine to medium grained sand. Drilling through rock between 10m and 10.5m but no sample returns. 50mm ID, 60mm OD, class 18 upvc 1mm slotted casing from 7m to 10m. Damp at bottom of hole, may have water when groundwater levels are high mm PVC end cap. Fallback from 10m to 10.5m. Total depth 10.5m. 155 ansen Bailey Environmental Impact Statement June 2013 A1-25
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