William C Cromer Pty. Ltd. 74A Channel Highway Taroona, Tasmania 7053 Australia
Mobile 0408 122 127 Fax 03 6227 9456 www.billcromer.com.au email [email protected]
VENTURE MINERALS LIMITED
RILEY
HYDROGEOLOGICAL REPORT
14 June 2012
WILLIAM C. CROMER PTY. LTD. ACN 009 531 613 ABN 48 009 531 613
ENVIRONMENTAL, ENGINEERING AND GROUNDWATER GEOLOGISTS
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Venture Minerals Ltd
RILEY HYDROGEOLOGICAL REPORT 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
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Cover photo Installing groundwater monitoring bore RYWB004 near the saddle on the main access road at Riley in mid-May 2012. Despite being collared within a few metres of the steeply-east? dipping serpentinised ultramafic outcrop at left, the bore passed through 18m of mainly gravelly clayey silt. Groundwater yield was very low at <0.1L/sec.
Refer to this report as
Cromer, W. C. (2012). Riley Hydrogeological Report. Unpublished report for Venture Minerals Ltd by William C. Cromer Pty. Ltd., 14 June 2012; 92pp including 64 pages of Attachments.
This report is an updated version of Cromer, W. C. (2012). Hydrogeological report, Riley Creek Project. Unpublished report for Venture Minerals Ltd. by William C. Cromer Pty. Ltd., 16 February 2012; 22pp.
Venture Minerals Ltd
RILEY HYDROGEOLOGICAL REPORT 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
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SUMMARY
This report is an updated version of the initial February 2012 hydrogeological report for Venture Minerals’ DSO laterite project at Riley. It includes water sampling, and drilling and aquifer testing results, from hydrogeological investigations conducted in April and May 2012.
Climate This report has adopted an annual rainfall at Riley of about 2,000mm – the average of mean rainfall at Tullah and Rosebery. Annual evapotranspiration totals about 750mm.
Surface water Five surface water monitoring sites were sampled, and stream flows measured, in May 2012. Surface waters were slightly alkaline (average pH 7.6), very low salinity (average EC 203µS/cm) waters of the magnesium bicarbonate type. Suspended solids were very low. Trace metals nickel and chromium were elevated relative to surface streams in the district, reflecting the influence of the ultramafic basement rocks and soils derived from them. Stream flows during the sampling run ranged from 10L/sec in Three Mile Creek upstream from Trinder Creek, to 80L/sec in Trinder Creek just above Riley Creek. However, for a rainfall event of (say) 75mm/day, stream flows (L/sec) are estimated to increase tenfold or more. The annual discharge in an average rainfall year from Riley Creek and nearby streams (in four sub-catchments totalling about 470ha) is estimated to total about 5,000ML (5GL). Groundwater Five groundwater monitoring bores were installed, tested and sampled in May 2012 to depths ranging from 4 – 23m within the Riley Creek area. Materials drilled were mainly fine grained weathering products including clayey silt, clay etc. The water table was encountered at depths between about 5 and 16m in the bores. Yields were low (<0.01 – 0.04L/sec in four bores), as were hydraulic conductivities (0.02 and 0.41m/day) in the two bores tested so far. The groundwater is slightly acidic (average pH 6.4) compared to the slightly alkaline surface waters, but of very similar salinity (average EC 204µS/cm), and tending towards the sodium chloride type in terms of major ions. Conceptual hydrogeological model for the area The current hydrogeological model for the area comprises steeply east?-dipping sedimentary rocks and ultramafics which in the surface 20m at least are variably and often highly-extremely weathered to fine-grained mixtures of silt, sand and clay. Conditions are broadly unconfined but locally confined. Hydraulic conductivity, storativity and groundwater flow rates are low. Flat-lying clayey surface materials are irregularly distributed and may minimise vertically downward groundwater infiltration. It is expected that weathering decreases with depth, and fracture permeability increasingly dominates, to depths around 100 – 150m or more. The water table is a subdued replica of the land surface. It is expected at depths up to about 15m on interfluves, shallowing to 5 – 10m on hillside flanks and at least seasonally intersecting the land surface along watercourses. Localised perched groundwater conditions can be expected at the base of surface laterite and may enter excavations – particularly near watercourses.
Venture Minerals Ltd
RILEY HYDROGEOLOGICAL REPORT 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
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CONTENTS
SUMMARY 3
1. INTRODUCTION 6
1.1 BACKGROUND 6 1.2 GEOLOGICAL SETTING 6 1.3 HYDROGEOLOGICAL ISSUES FOR RILEY 11
2. HYDROGEOLOGY OF RILEY 12
2.1 MEAN RAINFALL AT RILEY 12 2.2 SURFACE WATER HYDROLOGY 14
2.2.1 Surface drainage sub-catchments at Riley 14 2.2.2 Estimating stream discharges for the Riley area 14 2.2.3 Baseline monitoring of surface waters 15 2.2.4 Measured stream flows May 2012 15 2.2.5 Surface water quality 15
2.3 GROUNDWATER HYDROLOGY 19 2.3.1 Fundamentals of groundwater occurrence and movement 19 2.3.2 Groundwater drilling and aquifer testing 19 2.3.3 Water table conditions 20 2.3.4 Monitoring water table changes 21 2.3.5 Yields of monitoring bores 21 2.3.6 Permeability testing of monitoring bores 21 2.3.7 Groundwater quality 22 2.3.8 Conceptual hydrogeological model for Riley 22 2.3.9 Estimating components of the hydrogeological water balance 23 2.3.10 Numerical 3-D groundwater modelling 24
REFERENCES 28
FIGURES 1. Riley location map t 6 2. Satellite imagery of Riley and environs 7 3. Topography and drainage in relation to Riley laterite Areas A, B, C and D 8 4. Currently proposed mining and infrastructure layout for Riley 9 5. Geology of the Riley area 10 6. Rainfall stations, mean annual rainfall for northwestern Tasmania, and location of Riley 12 7. Surface drainage catchments in relation to Riley laterite Areas A, B, C and D, and surface water sampling locations 14 8. Piper diagrams for dissolved and total constituents of the surface waters sampled on 2 May 2012 18 9. Locations of Riley groundwater monitoring bores 19 10. Piper diagrams for major dissolved constituents of groundwaters sampled from monitoring bores in May 2012, and combined with surface water analyses 25 11. Conceptual hydrogeological model for Riley 26
TABLES
1. Rainfall records for Rosebery and Tullah, and adopted rainfall for Riley 13 2. Estimated monthly flows in streams at Riley 16 3. Water quality in monitored surface streams, 2 May 2012 17 4. Summary of Riley monitoring bores 20 5. Summary of hydraulic conductivity testing of Riley monitoring bores RYWB001 and RYWB002 21 6. Water quality in Riley monitored water bores, May 2012 24 7. Reasonable estimates for some components of Riley’s hydrogeological water balance 27
Venture Minerals Ltd
RILEY HYDROGEOLOGICAL REPORT 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
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ATTACHMENTS 1. Groundwater principles (5 pages including cover page) 29 2. Surface water laboratory reports (8 pages) 34 3. Tables of surface water analyses (8 pages) 42 4. Groundwater monitoring bores: logs, photographs and slug test results (24 pages) 50 5. Groundwater sampling at Riley: Transmittal forms and laboratory reports (11 pages) 74 6. Tables of groundwater analyses (8 pages) 85
Venture Minerals Ltd
RILEY HYDROGEOLOGICAL REPORT 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
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1 INTRODUCTION
1.1 BACKGROUND
Venture Minerals Ltd. (“Venture”) is investigating the feasibility of mining Direct Shipping Ore (DSO) from its Riley laterite project west of Tullah in western Tasmania (Figures 1 – 4).
The ore bodies are thin surface cappings of lateritic gravels up to about 4m thick cropping out over a combined area of about 1.2km
2.
William C. Cromer Pty. Ltd. was commissioned by Venture to undertake surface water and groundwater studies to establish existing hydrogeological conditions in the area, and to assist in developing a conceptual hydrogeological model for the project to aid in mine design and environmental management. Similar reports have previously been prepared for Venture’s Mt. Lindsay and Livingstone Projects to the west of Riley (Cromer, 2011a, 2011b).
1.2 GEOLOGICAL SETTING1
The Riley iron laterite deposits comprise a mixture of unconsolidated and cemented lateritic gravel mixed with and underlain by ferruginous clay. Four significant deposits are recognised, from west to east then north – Areas A, B, C and D (Figures 3 and 5). The combined area of laterite and ferruginous clay is approximately 1.2 km
2. Areas A and C are the most significant
of the laterite deposits. The laterites are largely restricted to topographic highs, with Areas A and C separated and dissected by Riley Creek, Area A bound in the northwest by Three Mile Creek, and Area C in the east and south by Trinder and Fowler Creeks. The laterite and lateritic gravel reaches up to 4m thickness, underlain by clay to depths of up to about 20m. Scours and quartz-rich sands beds a few centimetres thick are common at the base of the laterite suggesting a colluvial origin for the gravels, which are thought to be eroded off the ultramafic ridge upslope. Pockets of relict lateritic soil are widespread along Serpentine Ridge.
1Acknowledgement is made to Stuart Owen of Venture Minerals for this background geological information
Pieman Road
Figure 1. Riley location map Base map: Google Maps
Lake Pieman
Approx. km
0 5
GN
GDA94
5376000mN
GDA94
370000mE
Lake Pieman
Pieman Road
Area A Area B
Area C
Area D
Riley Creek Project
Riley Ck
100km
Lake Pieman
Venture Minerals Ltd
RILEY HYDROGEOLOGICAL REPORT 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
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GD
A94
369
000m
E
GD
A94
368
000m
E
GD
A94
5378
000m
N
GD
A94
5377
000m
N
Appro
x. km
0
1
GN
G
DA
94
370
000m
E
GD
A94
5376
000m
N
Figure 2. Satellite imagery of Riley and environs Source: Google Earth 2008
Riley
Pie
ma
n R
iver
Pie
ma
n R
oad
Huskis
son R
iver
Venture Minerals Ltd
RILEY HYDROGEOLOGICAL REPORT 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
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Figure 3. Topography and drainage in relation to Riley laterite Areas A, B, C and D Source: Venture Minerals Ltd 2012
Appro
x. km
0
1
GN
G
DA
94
369
000m
E
GD
A94
5378
000m
N
GD
A94
5377
000m
N
GD
A94
368
000m
E
Riley
Boundary
to
min
ing le
ase
applic
atio
n a
rea
Venture Minerals Ltd
RILEY HYDROGEOLOGICAL REPORT 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
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Figure 4. Currently proposed mining and infrastructure layout for Riley Source: Pitt & Sherry, March 2012 (reference HB11411_H003_ProposedLayout_12P_Rev01)
Venture Minerals Ltd
RILEY HYDROGEOLOGICAL REPORT 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
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The ferruginous clays commonly grade down into greenish and cream coloured clays and ultimately ultramafic basement, and the clays are currently thought by Venture to represent largely in situ saprolitic clay. Around the margins of the deposits laterite commonly laps directly onto ultramafic basement, and laterite Areas A and C also lap across the south western margin of the Wilson River Ultramafic Complex onto the Crimson Creek Formation. To the east Area C abuts a large terrace of unconsolidated fluvioglacial gravels.
Wilson River Ultramafic Complex
Crimson Creek
Formation
Riley Laterite Area A
Riley Laterite Area C
Riley Laterite Area B
Riley Laterite Area D
Figure 5. Geology of Riley Source: Venture Minerals Ltd. 2012
Source: Venture Minerals Ltd.
GD
A94
369
000m
E
GD
A94
367
000m
E
GDA94
5378000mN
GDA94
5377000mN
Approx. km
0 0.5
GN
GD
A94
368
000m
E
Gordon Limestone
Boundary to mining lease
application area
Venture Minerals Ltd
RILEY HYDROGEOLOGICAL REPORT 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
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The contact between the Wilson River ultramafics and the Crimson Creek Formation is most likely faulted (Brown, 1989), although the fault has not been observed by Venture geologists. The contact trends northwest-southeast, and is subvertical. Individual horizons within the Crimson Creek Formation are expected to be subvertical also, and perhaps steeply-east dipping like the ore-bearing skarns at Mt. Lindsay 10km to the west. Little structural information is available for the ultramafics, although subvertical igneous layering is known from Rileys Knob (Brown, 1989) and it is reasonable to assume for the purposes of this report that other intraformational units will be subvertical also. Four locations in the district were drilled during the current hydrogeological investigations, and at each site the bedrock (Ordovician limestone/sandstone, Cambrian Wilson River ultramafics, and Cambrian Crimson Creek Formation) was found to be deeply weathered (exhibiting soil properties) to depths of up to at least 23m. Locally, such steeply dipping and weathered horizons abut less weathered and outcropping ultramafics.
1.3 HYDROGEOLOGICAL ISSUES FOR RILEY A range of hydrogeological activities has been undertaken or is currently underway at Riley. These activities include:
climate monitoring (measuring rainfall, evaporation, temperature, solar radiation and humidity) at Venture’s Mt. Lindsay weather station installed in early March 2011 about 10km west northwest of Riley (Status – continuing)
defining the surface water and groundwater catchments for the project (Status – current)
surface water hydrology, including baseline surface water sampling and stream flow measurements on Three Mile, Riley, Trinder-Fowler and Sweeney-Gold Creeks (Status –current and continuing quarterly)
desktop conceptual groundwater hydrology (Status – current) and
groundwater drilling programme and installation of monitoring bores (completed) Several of these issues are addressed in the following Sections. This report is expected to be upgraded from time to time to keep apace with surface and groundwater sampling and monitoring, and related hydrogeological developments.
Venture Minerals Ltd
RILEY HYDROGEOLOGICAL REPORT 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
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2 HYDROGEOLOGY OF RILEY
2.1 MEAN RAINFALL AT RILEY Regional rainfall distribution in northwestern Tasmania (Figure 6) suggests that mean annual rainfall at Riley ought to be similar to that at Rosebery (1,950mm; 10km to the ESE), Savage River Mine (1,935mm; 37km to the NW), and Tullah (2,000mm; 16km to the E). Table 1 summarises rainfall records for Rosebery and Tullah. Tullah’s figures been adopted for Riley
2 and the mean annual rainfall has been rounded to 2,000mm.
2 Venture installed a weather station (elevation about 550m) at Mt. Lindsay in early March 2011. It supplies local
weather records for Venture’s Mt. Lindsay and Livingstone projects. Data collected include rain, evaporation, humidity, temperature and wind speed. In addition to accumulating longer-term climatic records, it will provide shorter-term, site-specific information to assist in hydrogeological water balance assessments, and management issues such as stream flows and diversions, mine dewatering, etc. Given the rainfall gradient in the district, the new station is perhaps not as relevant to Riley as is Rosebery and Tullah, both at similar elevations to Riley.
Figure 6. Rainfall stations (red circles), mean annual rainfall for northwestern Tasmania, and location of Riley
Source: Adapted from map at http://soer.justice.tas.gov.au/2003/image/265/index.php
Mean annual rainfall (mm)
3200 2800 2400 2000 1600 1200 1000 800 600
Tullah
Zeehan
Cradle Mt
Granville Harbour
Savage River
Rosebery
Waratah
Mt. Lindsay
Mt. Read
0 100
Approx. km
GN
GDA94
5381000mN
GDA94
363000mE
Riley
Venture Minerals Ltd
RILEY HYDROGEOLOGICAL REPORT 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
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Table 1. Rainfall records for Rosebery and Tullah, and adopted rainfall for Riley Source: www.bom.gov.au
Station: Rosebery (Gepp Street) Number: 97089 Opened: 1997 Now: Open
Lat: 41.78° S Lon: 145.54° E Elevation: 160 m
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
1997 71 204 183 181
1998 44 141 131 171 200 151 242 120 231 313 107 155 2005
1999 27 250 138 96 240 126 236 176 152 177 132 133 1881
2000 76 98 89 119 304 177 174 115 274 236 36 197 1895
2001 36 36 149 133 69 268 105 328 142 228 163
2002 201 82 99 48 108 368 379 232 316 224 143 140 2341
2003 92 25 109 156 115 269 275 328 423 163 61 100 2116
2004 212 61 88 291 393 264 178 189 152 134 129
2005 120 69 76 145 210 71 301 336 112 250 151 278 2119
2006 53 69 70 358 207 108 174 205 208 156 78 103 1788
2007 160 14 177 35 304 86 159 347 226 312 20 136 1976
2008 23 104 125 133 200 180 233 199 251 111 130 158 1846
2009 143 96 152 166 255 100 366 466 264 70 80 143 2302
2010 59 63 138 214 143 197 195 285 313 184 170 151 2112
2011 102 106 100 108 136 332 300 141 240 188
Statistic Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Lowest 23 14 70 35 69 71 105 115 71 70 20 100 1788
Highest 212 250 177 358 304 393 379 466 423 313 183 278 2341
Station: Tullah (Meredith Street) Number: 97087 Opened: 1995 Now: Open
Lat: 41.74° S Lon: 145.61° E Elevation: 167 m
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
1996 147 147 232 224 138 200 143 306 318 227 275 137 2495
1997 111 43 156 242 156 111 246 232 61 228 173 180 1938
1998 43 130 119 168 163 137 221 121 234 284 103 152 1875
1999 13 200 123 90 220 100 226 181 151 136 128
2000 72 83 72 96 299 174 174 112 290 254 54 184 1865
2001 39 29 139 128 260 317 139 112 137
2002 159 69 96 40 378 395 227 147 136
2003 88 20 94 107 92 242 261 321 398 176 52 84 1935
2004 211 54 82 288 370 272 205 186 139 149 141
2005 118 66 72 126 192 69 271 325 118 240 157 250 2003
2006 52 74 57 317 188 95 178 192 65
2007 22 143 32 295 75 318 211 326 21 132
2008 23 123 122 151 164 199 246 197 257 106 141 170 1899
2009 152 83 136 151 243 96 323 469 62 131
2010 38 49 154 219 128 190 268 312 174 158
2011 96 91 92 117 315 313 123 231
Statistic Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Lowest 13 20 57 32 92 69 143 112 61 62 21 84 1865
Highest 211 200 232 317 299 378 395 469 398 326 275 250 2495
Adopted rainfall for the Riley Creek Prospect
Elevation: 200 – 250m
Rainfall Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean rainfall (mm) 91 80 120 146 192 188 251 246 230 200 129 143 2,002
2011 rainfall (mm) 96 91 95 92 116 314 313 123 231 158 194 33 1,857
Highest rainfall (mm) 211 200 232 317 299 378 395 469 398 326 275 250 2495
Lowest rainfall (mm) 13 20 57 32 92 69 143 112 61 62 21 33 1865
Decile 1 rainfall (mm) 23 22 72 40 117 75 174 121 118 106 52 84 1,875
Decile 5 (median) rainfall (mm) 88 69 122 128 188 174 246 232 231 227 141 137 1,983
Decile 9 rainfall (mm) 159 130 156 224 288 315 313 321 312 254 173 180 2,003
Riley
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RILEY HYDROGEOLOGICAL REPORT 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
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2.2 SURFACE WATER HYDROLOGY
2.2.1 Surface drainage sub-catchments at Riley Riley laterite areas A – D straddle four surface drainage sub-catchments of Class 2 and Class 3 streams
3:
Trinder-Fowler Creeks Class 2 stream (catchment 250ha above Three Mile Creek
Riley Creek Class 3 stream (catchment 100ha)
Three Mile Creek Class 3 stream (catchment 60ha)
Sweeney-Gold Creeks Class 3 stream (catchment 50ha above Pieman Road) The Sweeney-Gold Creeks system drains north to a tributary of the Huskisson River (Class 1) and the other three catchments combine to discharge to Lake Pieman (Class 1).
2.2.2 Estimating stream discharges for Riley Table 2 summarises estimated monthly flows in streams at Riley, for decile 1, 5 and 9 monthly rain. The flows are generated using the effective rain method as outlined in the Notes to the Table.
3 Watercourse classification in accordance with Table 8 of the Forest Practices Code (2000). See Forest Practices
Board (2000). Class 1 watercourses are rivers, lakes, etc named on 1:100,000 topographic maps; Class 2 watercourses exclude Class 1 types and have catchments greater than 100ha; Class 3 watercourses have catchments between 50 and 100ha; Class 4 watercourses have catchments less than 50ha.
Lake Pieman
Area D
Area C
Area B
Area A Riley Creek
Fowler Creek
Trinder Creek
Gold Creek
Three Mile Creek
Huskisson River
Pieman Road
Sweeney Creek
200m
150m
200m
Riley Knob
Serpentine Ridge
0
Approx. km
2
GN
GW2
Riley Creek Project (Areas A, B, C, D indicated)
Drainage subcatchment
Surface water monitoring location
RYSW4
GD
A94
370000m
E
GD
A94
368000m
E
GD
A94
366000m
E
GDA94 5378000mN
GDA94 5377000mN
GDA94 5376000mN
RYSW1
RYSW3 RYSW2
RYSW5
RYSW5
Figure 7. Surface drainage catchments in relation to Riley laterite Areas A, B, C and
D, and surface water sampling locations
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This approach generates some months of no net rain, and hence no stream flows in an average year. The highest monthly stream flows (for decile 5 rain, for example) range from 100 – 400ML, and highest annual stream flows for decile 5 rain from 0.5 – 2GL. Estimated peak flows for an assumed maximum rain event of 75mm in one day range form 300 – 1,300L/sec.
2.2.3 Baseline monitoring of surface waters Five surface water monitoring stations have been established in the area (Figure 7), and the first round of stream gauging and water sampling was conducted on 2 May 2012. Sampling locations are: RYWS1 Three Mile Creek, 20m N of its confluence with the larger Trinder Creek, and
downstream of proposed mining operations in Area A RYWS2 Riley Creek, 50m N of its confluence with the larger Trinder Creek, and
downstream of proposed mining operations in Areas A and B RYWS3 Trinder Creek, 20m upstream of its confluence with Riley Creek, and
downstream of proposed mining operations in Area C RYWS4 Sweeney Creek where it crosses under the Pieman Road, and downstream of
proposed mining operations in Area D RYWS5 Trinder Creek upstream of proposed mining operations in Area C. All sampled creeks rise along the southeastern extension of Serpentine Ridge, underlain by the Wilson River Ultramafic Complex. Parts of the Sweeney-Gold Creek catchment above sample location RYSW4 on the Pieman Road are underlain by Gordon Limestone, and the lower reaches of Three Mile and Riley Creeks flow over the Crimson Creek Formation. About half of the length of the Trinder-Fowler Creek system also flows over Crimson Creek rocks.
2.2.4 Measured stream flows May 2012 Stream flow at all five sampling locations was measured
4 on 2 May 2012. Results were:
RYWS1 Three Mile Creek: Flow 10L/sec RYWS2 Riley Creek Flow 35L/sec RYWS3 Trinder Creek Flow 80L/sec RYWS4 Sweeney Creek Flow 20 L/sec RYWS5 Trinder Creek upstream Flow 13L/sec
2.2.5 Surface water quality Surface water quality at the five sampling locations in May 2012 is summarised in Table 3. Full laboratory reports are presented in Attachment 2, and individual results for each location are included in Attachment 3. The surface waters are of low salinity [electrical conductivity (EC) range 150 – 378µS/cm; average 271µS/cm] – very similar to the ECs recorded for groundwaters (Section 2.3.7). In contrast to the slightly acidic groundwaters, the surface waters are slightly alkaline (pH range 7.2 – 7.8; average 7.6). The Piper diagrams in Figure 8 show that with respect to major cations and anions all five surface waters are predominantly magnesium bicarbonate types, fairly typical of fresh surface waters generally. Sodium, potassium, calcium and chloride are subordinate. Despite draining lateritic country, the waters are relatively low in dissolved iron (range <20 to 326mg/L; average 198mg/L) – most likely due to the slightly alkaline pH. On the other hand, dissolved nickel (range 42 – 104µg/L; average 63µg/L) and chromium (range 4 – 6µg/L; average 4µg/L) are relatively elevated compared to other streams in the district and reflect the presence of soils derived from ultramafic bedrock
5.
4 Using a flow metre applied to stream depth and width at several readings across the channel.
5 Titanium, chromium, nickel and manganese are by far the four most abundant minor elements in ultramafic rocks,
being present at about 3,000mg/kg, 2,000 mg/kg, 2,000mg/kg and 1,300mg/kg respectively.
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RILEY HYDROGEOLOGICAL REPORT 14 June 2012
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All five samples collected on 2 May 2012 showed very low suspended solids (range <1 to 3mg/L; average 2mg/L) but a reasonable range in true colour (range 1 to 283CU; average 67CU). The small difference between apparent and true colour reflects the low suspended solid loads of the streams.
Table 2. Estimated monthly flows in streams at Riley Annual totals may not match the sum of monthly totals because they are calculated independently
Three Mile Creek at Trinder Creek (sample location RYSW1)
Catchment area (ha) 60
Assumed max daily rain (mm) 75
Assumed max daily stream flow (L/sec) 400
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Estimated monthly flow for decile 1 rain (ML) 0 0 0 0 40 20 80 50 50 30 0 0 450
Estimated monthly flow for decile 5 rain (ML) 0 0 10 20 70 80 120 110 110 90 50 20 600
Estimated monthly flow for decile 9 rain (ML) 20 0 20 70 130 150 160 160 150 110 70 50 700
Riley Creek at Trinder Creek (sample location RYSW2)
Catchment area (ha) 100
Assumed max daily rain (mm) 75
Assumed max daily stream flow (L/sec) 700
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Estimated monthly flow for decile 1 rain (ML) 0 0 0 0 60 40 140 80 80 50 0 0 900
Estimated monthly flow for decile 5 rain (ML) 0 0 10 40 120 130 200 180 180 150 80 40 1,000
Estimated monthly flow for decile 9 rain (ML) 40 0 40 120 210 250 260 260 250 180 110 80 1,100
Trinder-Fowler Creeks at Riley Creek (sample location RYSW3)
Catchment area (ha) 200
Assumed max daily rain (mm) 75
Assumed max daily stream flow (L/sec) 1300
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Estimated monthly flow for decile 1 rain (ML) 0 0 0 0 120 80 280 160 160 100 0 0 1,800
Estimated monthly flow for decile 5 rain (ML) 0 0 20 80 240 260 400 360 360 300 160 80 2,000
Estimated monthly flow for decile 9 rain (ML) 80 0 80 240 420 500 520 520 500 360 220 160 2,200
Sweeney-Gold Creeks at Pieman Road (sample location RYSW4)
Catchment area (ha) 50
Assumed max daily rain (mm) 75
Assumed max daily stream flow (L/sec) 300
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Estimated monthly flow for decile 1 rain (ML) 0 0 0 0 30 20 70 40 40 30 0 0 450
Estimated monthly flow for decile 5 rain (ML) 0 0 10 20 60 70 100 90 90 80 40 20 500
Estimated monthly flow for decile 9 rain (ML) 20 0 20 60 110 130 130 130 130 90 60 40 600
Trinder Creek upstream (sample location RYSW5)
Catchment area (ha) 50
Assumed max daily rain (mm) 75
Assumed max daily stream flow (L/sec) 300
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Estimated monthly flow for decile 1 rain (ML) 0 0 0 0 30 20 70 40 40 30 0 0 450
Estimated monthly flow for decile 5 rain (ML) 0 0 10 20 60 70 100 90 90 80 40 20 500
Estimated monthly flow for decile 9 rain (ML) 20 0 20 60 110 130 130 130 130 90 60 40 600
Notes
Catchment area (ha) from 1:25,000 topographic maps
Assumed max daily rain (mm) estimated from Bureau of Meteorology records of highest daily rain recorded for Rosebery (104mm), Tullah (83mm) and Savage River (97mm)
(eg see www.bom.gov.au/sp/ncc/cdio/weatherData/av?p_nccObsCode=136&p_display_type=dailyDataFile&p_startYear=&p_c=&p_stn_num=097047
Assumed max daily stream flow (L/sec) calculated as runoff:rainfall ratio of 0.75
Decile 1 rainfall (mm) estimated from Rosebery and climatic records
Decile 5 rainfall (mm) estimated from Rosebery and climatic records
Decile 9 rainfall (mm) estimated from Rosebery and climatic records
Evapotranspiration (ET; mm) are mean figures for the Pieman River catchment. See http://adl.brs.gov.au/water2010/pdf/monthly_reports/awap_310_report.pdf
Runoff:rain ratio adapted from adopted monthly rain for Mt Lindsay and the 1992 paper at www.forestrytas.com.au/assets/0000/0477/article_10.pdf
Decile 1 effective rain (mm) is rain less evapotranspiration, less 10% of rain as infiltration ("deep drainage")
Decile 5 effective rain (mm) is rain less evapotranspiration, less 10% of rain as infiltration ("deep drainage")
Decile 9 effective rain (mm) is rain less evapotranspiration, less 10% of rain as infiltration ("deep drainage")
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RYWS1 RYSW1 RYSW2 RYSW3 RYSW4 RYSW5
367010mE 367010mE 367470mE 367445mE 368730mE 368940mE
5376770mN 5376770mN 5376550mN 5376510mN 5379000mN 5376755mN
175mASL 175mASL 182mASL 180mASL 200mASL 220mASL
Sampling date 2/5/12 Duplicate 2/5/12 2/5/12 2/5/12 2/5/12
Time 1315 of 1145 1120 1700 1500
Lab report # 53835 2/5/12 53835 53835 53835 53835
Sampler WCCPL WCCPL WCCPL WCCPL WCCPL WCCPL Min Max Average
Field parameters
Flow L/sec 10 10 35 80 20 13 10 80 28
Flow m/sec
pH 7.4 7.4 7.6 7.7 7.2 7.5 7.2 7.7 7.5
EC µS/cm 196 196 190 135 202 296 135 296 203
Eh mV 26 26 50 72 56 90 26 90 53
DO mg/L 12.0 12.0 12.1 12.1 12.9 11.5 12 13 12
Turbidity NTU
Temperature 0C 10.3 10.3 10.4 10.0 9.9 10.6 9.9 10.6 10.3
Lab results
pH 7.2 7.5 7.8 7.6 7.5 7.7 7.2 7.8 7.6
EC µS/cm 217 217 199 150 218 378 150 378 230
TDS mg/L 116 116 111 112 126 190 111 190 129
TSS mg/L 2 <1 <1 3 2 <1 <1 3 2
Colour apparent CU 28 29 12 322 78 24 12 322 82
Colour true CU 13 15 1 283 69 21 1 283 67
Alkalinity CO3 mgCaCO3/L <2 <2 <2 <2 <2 <2 <2 <2 <2
Alkalinity HCO3 mgCaCO3/L 78 79 74 48 80 168 48 168 88
Total Alkalinity mgCaCO3/L
Acidity mgCaCO3/L <3 <3 <3 <3 4 3 <3 4
Chloride mg/L 17.7 17.8 16.0 15.3 16.4 15.5 15 18 16
Sulphate mg/L 3.2 3.1 2.4 2.0 3.5 2.0 2 4 3
Ammonia mg-N/L 0.002 0.002 <0.002 0.010 0.003 <0.002 <0.002 0.010
Nitrate mg-N/L 0.052 0.052 0.016 <0.002 <0.002 0.004 <0.002 0.052
Nitrite mg-N/L <0.002 <0.002 <0.002 0.006 0.003 <0.002 <0.002 0.006
Total N mg-N/L 0.15 0.19 0.06 0.45 0.22 0.10 0.06 0.45
P dissolved mg-P/L 0.007 0.006 0.004 0.003 0.004 0.005 0.003 0.007
Total P mg-P/L 0.010 0.009 <0.005 0.009 0.008 0.006 0.006 0.010
Ag dissolved µg/L <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5
Ag total µg/L <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5
Al dissolved µg/L 17 16 7 214 57 <5 7 214 62
Al total µg/L 59 62 20 325 163 10 10 325 107
As dissolved µg/L <1 <1 <1 <1 <1 <1 <1 <1 <1
As total µg/L <1 <1 <1 <1 <1 <1 <1 <1 <1
Ca dissolved mg/L 1.29 1.29 0.53 0.85 0.55 0.47 0.47 1.29 0.83
Ca total mg/L 1.31 1.35 0.52 0.83 0.62 0.46 0.46 1.35 0.85
Cd dissolved µg/L <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1
Cd total µg/L <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1
Co dissolved µg/L <0.5 <0.5 0.7 0.6 0.8 <0.5 <0.5 0.80 0.70
Co total µg/L <0.5 0.6 1.3 1.5 2.3 0.7 <0.5 2.3 1.3
Cr dissolved µg/L 4 4 4 6 4 4 4 6 4
Cr total µg/L 6 6 6 9 6 5 5 9 6
Cu dissolved µg/L <1 <1 1 1 1 <1 <1 1 1
Cu total µg/L 1 1 1 1 2 <1 <1 2 1
Fe dissolved µg/L 117 102 <20 326 245 <20 <20 326 198
Fe total µg/L 256 306 147 605 868 178 147 868 393
Hg dissolved µg/L <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05
Hg total µg/L <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05
K dissolved mg/L 0.33 0.31 0.16 0.20 0.22 0.16 0.2 0.3 0.2
K total mg/L 0.41 0.46 0.26 0.25 0.32 0.19 0.2 0.5 0.3
Mg dissolved mg/L 19.4 19.3 18.8 13.0 21.0 41.3 13 41 22
Mg total mg/L 19.6 20.2 19.1 13.2 21.3 42.1 13 42 23
Mn dissolved µg/L 7.9 7.9 5.3 6.4 8.5 2.2 2 9 6
Mn total µg/L 11.0 12.1 7.4 15.3 25.0 4.1 4 25 12
Na dissolved mg/L 9.66 9.59 9.24 8.73 9.33 8.76 9 10 9
Na total mg/L 9.71 10.2 9.70 8.92 9.47 8.94 9 10 9
Ni dissolved µg/L 44.2 43.6 104 42.4 65.6 80.9 42 104 63
Ni total µg/L 48.4 50.5 111 48.5 80.9 89.9 48 111 72
Pb dissolved µg/L <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5
Pb total µg/L <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5
Sb dissolved µg/L <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5
Sb total µg/L <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5
Se dissolved µg/L <5 <5 <5 <5 <5 <5 <5 <5 <5
Se total µg/L <5 <5 <5 <5 <5 <5 <5 <5 <5
Sn dissolved* µg/L <1 <1 <1 <1 <1 <1 <1 <1 <1
Sn total* µg/L <1 <1 <1 <1 <1 <1 <1 <1 <1
W dissolved* µg/L <1 <1 <1 <1 <1 <1 <1 <1 <1
W total* µg/L <1 <1 <1 <1 <1 <1 <1 <1 <1
Zn dissolved µg/L 5 2 3 4 8 2 2 8 4
Zn total µg/L 5 5 3 5 11 3 3 11 5
TPH µg/L <40 <40 <40 <40 <40 <40 <40 <40 <40
TPH C06-C09 µg/L <10 <10 <10 <10 <10 <10 <10 <10 <10
TPH C10-C14 µg/L <10 <10 <10 <10 <10 <10 <10 <10 <10
TPH C15-C28 µg/L <10 <10 <10 <10 <10 <10 <10 <10 <10
TPH C29-C36 µg/L <10 <10 <10 <10 <10 <10 <10 <10 <10
* Not NATA endorsed analysis. WCCPL = William C. Cromer Pty. Ltd.
Table 3. Water quality in monitored surface streams, 2 May 2012 Laboratory reports are presented in Attachment 2, and individual stream results in Attachment 3.
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Dissolved constituents
Dissolved+suspended constituents
Figure 8. Piper diagrams for dissolved (top) and total (bottom) constituents of the surface waters sampled on 2 May 2012. The diagrams are essentially identical. Source: M. Hocking
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2.3 GROUNDWATER HYDROLOGY
2.3.1 Fundamentals of groundwater occurrence and movement Attachment 1 provides background information on groundwater principles. In particular, Figures 1.1 and 1.2 in the Attachment illustrate aspects of the land-based hydrogeological cycle, and groundwater occurrence in a gravity-driven system like Riley, respectively. Given the relatively subdued relief of the district, it can be expected that the near-surface dominant groundwater flows to depths of the order of a few tens of metres or so will be as local systems, with recharge on elevated areas discharging to streams like Riley Creek. However, at greater depths (well below proposed mining depths) the dominant groundwater flows will become increasingly intermediate and then regional in nature. It is therefore important to recognise the local site in the context of the larger groundwater system.
2.3.2 Groundwater drilling and aquifer testing To assess groundwater conditions and aquifer properties at Riley, a 5-hole drilling programme was conducted in April and May 2012. Holes were cased, screened and completed as groundwater monitoring bores. Locations of the bores (designated RYWB001, 002,…005) are shown in Figure 9. Table 4 summarises the results of drilling. Logs and photographs of each bore are presented in Attachment 4.
Figure 9. Locations of groundwater monitoring bores for Riley. Conceptual hydrogeological models through section lines A – B and C – D are depicted
in Figure 10.
A
B
C
D
GW2
Riley Areas A, B, C, D
Drainage subcatchment
Groundwater monitoring bore (May 2012)
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Monitoring bore RYWB001 was collared in Ordovician Gordon Limestone correlate, and passed through interbedded, extremely weathered
6 sandstone and siltstone for its full depth of
12.3m. Bores RYWB002 and RYWB003 were collared in laterite over Neoproterozoic ultramafics, passing through about 2m of ferruginous clay and ferruginous clayey gravel before showing that the ultramafics were extremely weathered to clay to depths up to 23m. Similarly, bore RYWB004 was collared in ultramafics next to a serpentinised ultramafic outcrop, and passed through clayey silt, silt and siltstone to 18m. Bore RYWB005 was collared in the Cambrian Crimson Creek Formation west of the ultramafics and encountered soft purplish siltstone beneath 5m of clay, to a depth of 23m.
2.3.3 Water table conditions Drilling suggests that as expected from first principles, groundwater conditions appear broadly unconfined, but may be locally confined (perhaps in a complicated manner) by steeply-dipping
bedrock horizons extremely weathered to clays, and subhorizontal surface cappings of clayey materials. Water is expected to be stored in fractures in all bedrock types in the district, in interstitial openings in weathered materials, and in porous and permeable varieties of surface laterite. The water table in May 2012 was relatively close to the surface (5.3m and 8.9m) in monitoring bores RYWB001 and RYWB002, and was about 16m deep in bore RYWB004 on the low saddle separating east- and west-flowing surface streams (Figure 9). Hole RYWB003 was dry to 4.4m depth, and the water table in RYWB005 was undetermined at the time of writing, but is expected to be at a depth of about 15 – 17m. Shallow groundwater seepage was observed in May 2012 entering exploratory costeans from the base of the laterite overlying clayey silt (inset photo at left). Rain runoff was also entering the costean.
6 “Extremely weathered” used in this report means the material exhibits soil properties (ie it can be remoulded in hand
specimen, with or without adding water).
Hole ID RYWB001 RYWB002 RYWB003 RYWB004 RYWB005
Easting (GDA94) 368532 367708 367706 368283 367380
Northing (GDA94) 5378761 5377096 5377096 5377671 5376828
Date drilled 17-Apr-12 18-Apr-12 19-Apr-12 14-May-12 15-May-12
Collar elevation (mASL) 210 220 220 270 200
Depth (mbg) drilled 12.5 23.1 4.4 18.0 23.0
Estimated yield on drilling (L/sec) 0.04 0.03 dry <0.01 0.03
Standing water level on completion (mbg) 5.3 8.9 dry 15.6 ND
Screened interval (mbg) 9 – 12 16.5 – 19.5 1 – 4 12 – 15 19 – 22
Permeability (slug) tests 4 5 None None None
Slug test interval (mbg) 9 – 12 16.5 – 19.5
Photos of drill returns Yes Yes Yes Yes Yes
Returns retained No Yes No Yes Yes
Field water quality tested No Yes No Yes Yes
Water sample analysed? Yes Yes No Yes Yes
Water level data logger installed? Yes Yes No Yes Yes
mbg = metres below ground
Table 4. Summary of Riley monitoring bores
Shallow seepage water entering costean near
367500mE 5377000mN, May 2012
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Monitoring bore RYWB001
Easting 368532mE
Northing 5378761mN
Depth interval tested 9 – 12mbg
Slug
test
Slug
length
m/day m/sec
1 1m 1.00E-05 0.86
2 1.5m 2.08E-06 0.18
3 1m 1.11E-05 0.96
4 1.5m 2.15E-06 0.19
Geometric mean 4.72E-06 0.41
Monitoring bore RYWB002
Easting 367708mE
Northing 5377096mN
Depth interval tested 16.5 – 19.5mbg
Slug
test
Slug
length
m/day m/sec
1 1m 1.39E-07 0.01
2 1.5m 9.69E-08 0.01
3 1.5m 3.56E-07 0.03
4 1m 1.06E-07 0.01
5 1.5m 3.54E-07 0.03
Geometric mean 1.78E-07 0.02
Calculated hydraulic
conductivity
Calculated hydraulic
conductivity
All bores within the lateritic area are located on or near interfluves on relatively high ground. The water table on lower slopes is expected to be closer to the surface, and will at least seasonally intersect the ground surface along watercourses. Seepages into excavations may be encountered in mining operations in these low-lying areas.
2.3.4 Monitoring water table changes In May 2012, digital data loggers were installed in all monitoring bores except RYWB003 (dry) to track and record short-, medium- and long-term water table fluctuations in response to rain.
2.3.5 Yields of monitoring bores Table 4 and Attachment 4 show that groundwater was encountered in four of the five bores but that yields were low to very low, ranging from <0.1L/sec in bore RYWB004 to around 0.03 – 0.04L/sec in the remaining three. These low values reflect the extremely weathered nature of the bedrock materials, and suggest that pathways for groundwater movement are relatively limited – at least locally.
2.3.6 Permeability testing of monitoring bores In May 2012, slug testing was conducted on monitoring bores RYWB001 and RYWB002 to estimate aquifer hydraulic conductivity over the 3m long screened interval in each
7. Results
are summarised in Table 5, and plots of all nine slug tests are included with the bore logs in Attachment 4. Values for hydraulic conductivity (permeability) are low (reflecting the low yields) and range from 0.02m/day in bore RYWB002 to about 20 times higher at 0.41m/day in bore RYWB001.
7Bores RYWB004 and RYWB005 were not completed in time for the testing. Bore RYWB003 was dry.
Table 5. Summary of hydraulic conductivity testing of Riley monitoring bores RYWB001 and RYWB002 Source: M. Hocking
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2.3.7 Groundwater quality Groundwater from each of the four bores which showed measureable yields was sampled and analysed in May 2012. Laboratory reports of the analyses from this initial sampling event are included in Attachment 5, and the same results are presented in tabular form for each bore in Attachment 6. Table 6 summarises the analytical results. In contrast to the slightly alkaline surface waters, the groundwaters are slightly acidic (pH range 5.5 – 7.0; average 6.4) and of low salinity (EC range 78 – 417µS/cm; average 204µS/cm). The Piper diagrams in Figure 10 show that with respect to major cations and anions the groundwaters vary but trend towards sodium chloride types (compared to the magnesium bicarbonate surface waters). This is fairly typical of groundwaters where compared to surface waters chloride tends to become enriched with time. In Figure 10, bore RYWB004 plots separately from the others as a result of its anomalously high sulphate content
8. Usually, this tends to be typical of gypsum-rich groundwater but other
sources of sulphate (or sulphides) may also be present in the extremely weathered ultramafics drilled at this location. The high sulphate also suggests that bore RYWB004 may be screened in a different aquifer to the other three bores, and that the groundwater in it has limited association with surface waters. Despite draining lateritic country, the groundwaters (like the surface water samples) are relatively low in dissolved iron (range <20 to 209µg/L). Also in common with the surface waters, dissolved nickel is elevated (517µg/L and 261µg/L) in groundwater in the two bores drilled into the ultramafic bedrock (RYWB002 and RYWB004) compared to the groundwater in bores RYWB001 (17µg/L) and RYWB005 (14µg/L) drilled to the east and west of the ultramafics respectively. Dissolved chromium is also significantly elevated (160µg/L and 60µg/L) in groundwater in RYWB002 and RYWB004 compared to groundwater from RYWB001 and RYWB005 (undetected at <1µg/L).
2.3.8 Conceptual hydrogeological model for Riley Based on the site observations, the drilling programme, and the groundwater fundamentals described in Figure 1.2 in Attachment 1, the groundwater study area for Riley is likely to approximate the surface subcatchment areas shown in Figure 7. A conceptual hydrogeological model for the same area is presented in Figure 11. The locations of the two cross sections are shown in Figure 9. In Figure 11, the main components of the hydrogeological water balance are shown in blue type. Table 7 lists most of these components, and ascribes estimates or ranges to them based on the investigations described in the present report. The key features of the conceptual model are:
steeply east?-dipping sedimentary rocks and ultramafics which in the surface 20m at least are variably and often highly-extremely weathered to fine-grained mixtures of silt , sand and clay. Hydraulic conductivity and storativity are variable but low, and some units may present local sub-vertical barriers to groundwater movement – but perhaps of limited depth. Flat-lying clayey surface materials are irregularly distributed and may minimise vertically downward groundwater infiltration. Some rock units are considerably less weathered at the surface, and within these fracturing is expected to be relatively intense at and near the surface, becoming less so with depth. It is also expected that in a general sense the degree of weathering decreases with depth, and fracture permeability increasingly dominates, to depths around 100 – 150m or more, below which permeabilities probably tend to decrease with increasing overburden pressure which tends to close fractures. Overall, hydraulic conductivity and storativity are expected to be variable.
8 The AST laboratory in Hobart confirmed the anomalous result.
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Groundwater conditions are broadly unconfined, with a regional water table as a subdued replica of the land surface, and at least seasonally intersecting the land surface along drainage lines.
Near-surface groundwater flow to Riley Creek and other watercourses in the area is controlled by local systems, where flow lines are steep (equipotential lines are gently inclined) and recharge and discharge occur on hills and intervening valleys respectively.
At increasing depths, flow becomes intermediate and then regional in scale, with equipotential lines steepening to near-vertical, and flow lines almost horizontal.
2.3.9 Estimating components of the hydrogeological water balance Table 8 summarises estimated values or ranges of values for various components of the hydrogeological water balance for Riley, based on hydrogeological principles, and site observations and drilling.
2.3.10 Numerical 3-D groundwater modelling Numeric 3-D modelling
9 is not considered necessary for Riley for the following reasons:
mining will be undertaken via surface removal of lateritic materials to depths of only a few metres, and
the water table over most of the area proposed for mining will be at depths of 5 – 10m or more, and will not be encountered during operations, so that it will usually not be necessary to dewater ahead of, or during, mining.
Because watercourses in the area are groundwater discharge areas (Attachment 1 and Figure 11), shallow groundwater may be encountered during mining adjacent to creeks if the depth of excavation is near or below the watercourse. Groundwater infiltration to excavations can be minimised by appropriate management which, depending on local topography, might incorporate variable-width setbacks to watercourses so that mining depth remained above creek level.
9Venture is well advanced on a numeric 3-D groundwater model (Hocking, 2011) for the Mt. Lindsay tin-tungsten-iron-
copper project 10km to the west northwest of Riley Creek. A similar model is currently being developed for the Livingstone haematite project.
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Table 6. Water quality in Riley monitored water bores, May 2012 Laboratory reports are presented in Attachment 5, and individual bore results in Attachment 6.
RYWB001 RYWB002 RYWB003 RYWB004 RYWB005
Easting (GDA94) 368532mE 367708mE 367706mE 368283mE 367380mE
Northing (GDA94) 5378761mN 5377096mN 5377096mN 5377671mN 5376828mN
Elevation (approx) 210mASL 220mASL 220mASL 270mASL 200mASL
Sampling date 3/5/12 3/5/12 3/5/12 3/5/12 3/5/12Time 0812 1022 No sample 1300 1330
Lab report # 53832 53832 53995 53995Sampler WCCPL WCCPL WCCPL WCCPL Min Max Average
Sampling
Bore depth mbg 12.5 23.1 4.4 18.0 23.0
Standing water level (mbg) mbg 5.3 8.9 dry 15.6 c17.5
Method Low flow Low flow Low flow Air lift
Volume extracted L 50 50 20 20 20 50 35
Field parameters
pH 5.2 5.5 6.5 5.2 6.5 5.7
EC µS/cm 118 185 400 70 70 400 193
Eh mV 103 80 -73 -73 103 37
DO mg/L 1.4 7.7
Temperature 0C 11.8 12.5 11.4 9.3 9.3 12.5 11.3
Lab results
pH 5.5 6.1 6.8 7.0 5.5 7.0 6.4
EC µS/cm 134 185 417 78 78 417 204
TDS mg/L 90 107 290 63 63 290 138
TSS mg/L 338 87 87 338
Colour apparent CU >500 494
Colour true CU 22 <1 <1 <1 <1 22
Turbidity NTU
Alkalinity H2O2 mgCaCO3/L
Alkalinity CO3 mgCaCO3/L <2 <2 <2 <2 <2 <2 <2
Alkalinity HCO3 mgCaCO3/L 12 37 84 3 3 84 34
Total Alkalinity mgCaCO3/L 84 3
Acidity mgCaCO3/L 88 63 29 <3 <3 88 60
Chloride mg/L 17.4 25.9 18.4 17.2 17.2 25.9 19.7
Sulphate mg/L 16.1 10.2 108 3.6 3.6 108 34.5
Ammonia mg-N/L 0.005 0.035 0.006 0.004 0.004 0.035 0.013
Nitrate mg-N/L 0.005 0.022 0.018 0.055 0.005 0.055 0.025
Nitrite mg-N/L <0.002 <0.002 0.002 <0.002 <0.002 0.002 <0.002
Total N mg-N/L 0.09 0.10
P dissolved mg-P/L 0.003 0.003 <0.5 <0.5
Total P mg-P/L 0.030 0.007
Ag dissolved µg/L <0.5 <0.5 <0.5 <0.5
Ag total µg/L <0.5 <0.5
Al dissolved µg/L 21 <5 <5 <5 <5 21
Al total µg/L 5,560 891
As dissolved µg/L <1 <1 <1 <1 <1 <1 <1
As total µg/L 2 <1
Ca dissolved mg/L 0.95 1.74 13.4 0.62 0.62 13.4 4.2
Ca total mg/L 1.14 1.96
Cd dissolved µg/L <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1
Cd total µg/L <0.1 <0.1
Co dissolved µg/L 23 19.8 1.0 5.4 1 23.4 12.4
Co total µg/L 29 82.5
Cr dissolved µg/L <1 160 60 <1 <1 160
Cr total µg/L 11 239
Cu dissolved µg/L <1 <1 <1 <1 <1 <1 <1
Cu total µg/L 6 1
Fe dissolved µg/L 209 51 <20 <20 <20 209
Fe total µg/L 9,000
Hg dissolved µg/L <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05
Hg total µg/L <0.05 <0.05
K dissolved mg/L 1.05 0.21 0.54 0.39 0.21 1.05 0.55
K total mg/L 1.63 0.38
Mg dissolved mg/L 3.41 7.22 32.6 1.71 1.71 32.6 11.2
Mg total mg/L 5.40 7.78
Mn dissolved µg/L 243 56.2 <0.5 48.9 <0.5 243 116
Mn total µg/L 333 365
Na dissolved mg/L 15.9 22.8 9.90 8.83 8.83 22.8 14.4
Na total mg/L 16.0 21.6
Ni dissolved µg/L 17.1 517 261 13.9 13.9 517 202
Ni total µg/L 27.7 649
Pb dissolved µg/L <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5
Pb total µg/L 4.2 1.1
Sb dissolved µg/L <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5
Sb total µg/L <0.5
Se dissolved µg/L <5 <5 <5 <5 <5 <5 <5
Se total µg/L <5 <5
W dissolved* µg/L <1 <1 <1 <1 <1 <1 <1
W total* µg/L <1 <1
Zn dissolved µg/L 24 8 <1 7 <1 24 13
Zn total µg/L 42 13
TPH µg/L <40 <40 <40 <40 <40 <40 <40
TPH C06-C09 µg/L <10 <10 <10 <10 <10 <10 <10
TPH C10-C14 µg/L <10 <10 <10 <10 <10 <10 <10
TPH C15-C28 µg/L <10 <10 <10 <10 <10 <10 <10
TPH C29-C36 µg/L <10 <10 <10 <10 <10 <10 <10
* Not NATA endorsed analysis
WCCPL = William C. Cromer Pty. Ltd.
Blank space indicates an analyte was not requested
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RILEY HYDROGEOLOGICAL REPORT 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
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Major dissolved constituents in groundwaters in monitoring bores
Major dissolved constituents in groundwaters and surface waters
Figure 10. Piper diagrams for major dissolved constituents of groundwaters sampled from monitoring bores in May 2012 (top), and combined with surface water analyses (bottom).
Source: M. Hocking
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RILEY HYDROGEOLOGICAL REPORT 14 June 2012
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100
120
140
160
180
200
220
240
80
60
40
20
0
mA
SL
La
ke
Pie
ma
n
100
120
140
160
180
200
220
240
80
60
40
20
0
mA
SL
Trinder
Cre
ek
Rile
y C
reek
Gold
Cre
ek
Th
ree
Mile
Cre
ek
Tri
nd
er
Cre
ek
Fo
wle
r C
ree
k
Section line A – B Vertical exaggeration approx. 10x
Southwest Northeast
Northwest Southeast
Section line C – D Vertical exaggeration approx. 10x
Se
ctio
n lin
e A
– B
S
ection lin
e C
– D
A B
C D
Bore
RY
WB
002
Recharge
G’water base flow to surface
streams
G’water base flow to surface
streams
Discharge
Near-surface hydraulic conductivity reduced by
weathering
Clay soils and weathering profile (low permeability)
FA
ULT
?
FA
ULT
?
Local flow
Local flow
Local flow
Regional flow
Regional flow
Intermediate flow
Intermediate flow
Local flow
Intermediate flow
Unconfined fractured rock aquifer (hydraulic conductivity,
transmissivity; storativity)
Fault? (locally increased
hydraulic conductivity)
Discharge
Discharge Discharge
Crimson Creek Formation Steeply east?-dipping lithic sandstone and siltstone
Wilsons Creek Ultramafic Complex Steeply east?-dipping serpentinite, pyroxenite, harzburgite, dunite
Ordovician Gordon Limestone correlate Steeply east?-dipping, and including lithic sandstone and siltstone
EoC
am
brian
Ferruginous lateritic gravel and cemented laterite
Ferruginous clay with minor lateritic gravel
Quate
rnary
T
ert
iary
Rile
y C
ree
k
Intermediate flow (out of page)
Regional flow (out of page)
Recharge
G’water base flow to surface streams
Near-surface hydraulic conductivity reduced by
weathering
Local flow
Discharge
Discharge
Local flow
Recharge
Recharge
Figure 11. Conceptual hydrogeological model for Riley. Section lines are shown in Figure 9. Do not scale.
Bore
RY
WB
004
Bore
RY
WB
001
Extremely weathered profile developed on all bedrock types to depths of at least 20m; locally absent; may also locally extend at depth down favourable horizons
Channel flow in creeks
Bore
RY
WB
003
Bore
RY
WB
005
Outcropping less weathered bedrock
Water table is a subdued replica of the land surface
Water table is a subdued replica of the land surface
Clay soils and weathering profile (low permeability)
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RILEY HYDROGEOLOGICAL REPORT 14 June 2012
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Component Units Reasonable value or
range of values for the Riley Creek Project
Remarks, and/or field monitoring or testing to refine range of values
Precipitation mm/year 2,000 Maintain weather station at Mt. Lindsay
Surface runoff (overland flow) mm/year 1,000 to 1,200 Estimate from effective rain method (eg Table 2). Also conduct stream gauging on Riley Creek and nearby watercourses during water sampling events.
Surface evaporation mm/year
750
Maintain weather station at Mt. Lindsay
Transpiration from vegetation mm/year Estimate from published data for Pieman River catchment
Direct groundwater recharge mm/year 200 Rain which infiltrates uniformly to the water table. Assume about 10% of precipitation, but check against water table data loggers in monitoring bores.
Macropore (“preferential”) recharge KL or ML per rain event
Rain which infiltrates preferentially through joints, clay fractures, root holes, etc rather than via uniform vertical percolation. Estimate from soil texture and near surface joint distribution in drill core
Depth to water table metre 0 to 20m Digital data loggers are recording water level depths and fluctuations
Surface storage megalitre minor From effective rain estimates (eg Table 2)
Groundwater inflow to the system ML 0 to 50 Estimate from numeric modelling at Mt. Lindsay
Groundwater outflow from the system ML 400 to 500 Estimate from numeric modelling at Mt. Lindsay
Groundwater recharge from streams mm/year 0 to 50 Estimate from stream gauging. Seasonally variable
Groundwater discharge to streams (baseflow)
mm/year 0 to 50 Estimate from stream base flow. Seasonally variable
Groundwater extraction from bores ML Insignificant No extraction planned
Evaporation from shallow water tables mm/year Potentially significant Estimate from numeric modelling at Mt. Lindsay
Vertical leakage between aquifers mm/year Not applicable? Probably only one aquifer is present
Unconfined aquifer hydraulic conductivity
m/day 0.01 to 0.05 Based on hydraulic conductivity testing of two bores
Unconfined aquifer specific yield % volume 1 to 3 Estimated from hydraulic conductivity testing
Groundwater flow to open pits ML/day Minor. Depends on pit location close to
watercourses
Estimate from aquifer testing
Table 7. Reasonable estimates for some components of the hydrogeological water
balance for Riley
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REFERENCES
Brown, A. V. (1989). Eo-Cambrian – Cambrian Ultramafic Rocks, in Burrett, C. F. and Martin, E. L. (Eds). Geology and Mineral Resources of Tasmania. Special Publication 15, Geological Society of Australia Inc. pp71 – 74.
Cook, P., Staffacher, M., Therrien, T., Halihan, R., Richardson, P., Williams, P. and Bradford, A. (2001). Groundwater recharge and discharge in a saline urban catchment; Wagga Wagga, New South Wales. CSIRO Land and Water Technical report 39/01 Cromer, W. C. (2011a). Hydrogeological report, Mt. Lindsay Project. Unpublished report for Venture Minerals Ltd. by William C. Cromer Pty. Ltd., 27 June 2011; 50pp. Cromer, W. C. (2011b). Hydrogeological report, Stanley River Project. Unpublished report for Venture Minerals Ltd. by William C. Cromer Pty. Ltd., 2 August 2011; 36pp. Hocking, et al. (2011). Mt. Lindsay: Groundwater model (Version 1.0). Unpublished report for Venture Minerals by Hocking et. al. Pty. Ltd. Hydro Geo Environmental Services, December 2011. Sophocleous, M., (2004). Groundwater recharge, in Groundwater, [Eds. Luis Silveira, Stefan Wohnlich and Eduardo J. Usunoff] in Encyclopaedia of Life Support Systems (EOLSS), Developed under the Auspices of the UNESCO, Eolss Publishers, Oxford, UK, [www.eolss.net)
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ATTACHMENT 1 (5 pages including this page)
Groundwater principles
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Origin of groundwater
All earth’s water was formed deep underground by magmatic processes, and has over geological time been released at the surface and on ocean floors by volcanism. The mechanism continues today. With the exception of this ‘new’ water, all groundwater is derived from that part of precipitation which, after surface runoff and evaporation, infiltrates the soil. Some of the infiltrating water is transpired by plants, some is drawn upward by capillary action and evaporated, and some remains indefinitely in microscopic voids in the soil profile. During and after continuous and wetting rain, the remainder infiltrates downwards, intermittently and successively saturating the material through which it passes, until the water reaches the zone of saturation. Here, the soil or rock voids (openings) are completely filled with water. The water is then called groundwater, and the upper surface of the zone of saturation is known as the water table. The water table is usually a subdued replica of the land surface, being almost flat under gently undulating ground and deeper and sloping under hills. The proportion of rain infiltrating into the soil is very variable, ranging from a few percent on steep, rocky slopes, to perhaps 50% or more in sandy or gravelly areas with little runoff. The proportion also changes seasonally, and infiltration would be expected to be a maximum when evaporation is least – at night in winter. Of the water which enters the soil, only a fraction avoids transpiration or retention in soil voids, and infiltrates to the water table. Groundwater is therefore a part of the general hydrological cycle, and is directly related to the surface movement of water.
Unconfined and confined aquifers
An aquifer is a body of rock, or unconsolidated material such as sand, capable of supplying useful amounts of groundwater. An aquifer has two purposes: it stores, and transmits, groundwater. The relative importance of each function is determined by the nature of each aquifer. Some aquifers (eg hard sandstone) may store only a small amount of water in a network of thin fractures, but might transmit it freely, and remain reliable suppliers, if the fractures are sufficiently interconnected. Other materials like fine-grained and porous clays may contain larger amounts of water, but yield only small amounts because the water is not transmitted easily through their microscopic voids. Aquifers may be unconfined, confined or semi-confined. An unconfined or water table aquifer exists in unconsolidated sediments or hard, fractured rock whenever the water table is in contact with air at atmospheric pressure. Unconfined aquifers therefore receive recharge from infiltrating rain over their full areal extent. Groundwater in a bore tapping an unconfined aquifer is encountered at the level of the water table. A bore drilled into an unconfined fractured rock aquifer may remain dry to depths below the water table if no water-bearing fractures are intersected
1, but once they are, the water will rise to the level
of the water table. Since fractured rock aquifers are largely solid, dry rock separated by a network of fractures, it is possible for two bores side by side to yield different amounts of water, or either or both might remain dry. A confined aquifer is a saturated, permeable zone bounded above and below by relatively impermeable materials (rock or soil). The zone therefore cannot receive recharge by directly infiltrating rain, but must get it from a recharge area elsewhere, where the permeable zone is exposed at the land surface, and where at least local unconfined conditions exist. The infiltrating groundwater in the zone of recharge moves crossgradient or downgradient beneath the confining impermeable layer. The water in confined zones of aquifers is therefore not in contact with the atmosphere, and is at a pressure greater than atmospheric. Water in bores tapping confined aquifers rises up the bore under pressure, and may overflow at the land surface. If the water in the bore rises above the land surface (so that groundwater flows without the need for a pump), the groundwater (and the bore) are said to be artesian. If the groundwater rises but not sufficiently for the bore to flow, the groundwater is sub-artesian. A semi-confined aquifer receives vertical groundwater leakage from a higher aquifer down via a semi-permeable (rather than impermeable zone) zone separating them. It is possible for an aquifer to be unconfined in one part of it, confined in another, and semi-confined elsewhere. The zone of confinement or semi-confinement may be relatively small, so that locally the aquifer behaves in a confined manner, but on a broader scale, unconfined conditions dominate. An example is a fractured hard rock aquifer where water is contained only within joints and similar defects
1At this local scale, groundwater conditions are confined.
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which extend and are open to the land surface, separated by impermeable rock where no water is present. The water in the joints is unconfined. Drilling through the rock produces no water, which is only struck (and which rises to the level of the water table) when a water bearing fracture is intersected.
Storage capabilities of fractured rock aquifers
Groundwater in fractured rock aquifers is stored in fractures within the rock mass. Usually, the volume of fractures as a proportion of the rock mass is low, and commonly less than a few percent. These aquifers therefore often have low storage capabilities, in comparison to unconsolidated aquifers like coastal sands. In these materials, the water is stored in voids between the sand grains, and the voids are interconnected (ie the aquifer is intergranular). The voids may constitute from 25% to 35% of the volume of sand (ie the porosity, θ, of the sand is 25% to 35%, or 0.25 to 0.35 expressed as a fraction). Each cubic metre of saturated sand below the water table therefore contains 250L to 350L of groundwater.
Primary and secondary porosity
The voids between sand grains in a coastal sand body, or the vesicles in otherwise hard basalt, for example, constitute primary porosity, because they were formed at the same time as the sand was deposited, or the basalt flowed as lava. As the sand becomes progressively cemented and consolidated in the process of becoming hard rock, the primary porosity is reduced. Most hard rocks have very little remaining primary porosity. However, if the hard rock becomes fractured and otherwise jointed, the fractures constitute secondary porosity.
Groundwater gradient
Groundwater is rarely stationary. It moves in response to gravity, and hydrostatic and lithostatic pressures, from recharge areas to discharge zones. Discharge occurs wherever the water table intersects the land surface in springs, swamps, rivers and the sea, provided the water table slopes towards the feature. If the water table is lower than the feature, water may flow from the spring or river to the groundwater body. The slope of the water table is called the water table gradient
2, which determines
the direction and rate at which groundwater moves. The greater the gradient, the more rapid the flow. Groundwater usually flows in the direction of steepest gradient.
Aquifer hydraulic conductivity and transmissivity
Hydraulic conductivity (symbol K) is a measure of how readily an aquifer transmits water, and is defined as the rate at which groundwater will flow from a unit area (eg one square metre) of aquifer under a unit gradient (ie the gradient is 1). It is expressed as cubic metres per day per square metre (m
3/day/m
2,
which reduces to m/day). Permeabilities of fractured rock aquifers are a function of the intensity of fracturing, their openness, and the degree to which they interconnect. Since these features are often very variable, hydraulic conductivity also varies widely. Typical ranges for fractured, hard rock might be 0.01 – 100m/day. Transmissivity (T) is defined as the product of hydraulic conductivity and saturated aquifer thickness, and is therefore the rate at which groundwater will flow from a vertical, one-metre wide strip of the aquifer under a unit hydraulic gradient.
Fundamentals of groundwater occurrence and movement Figure 1.1 illustrates different components of the land-based part of the hydrological cycle
3 at the scale of
a single catchment or smaller. The fundamentals of groundwater movement in an unconfined4, fractured-
2 The gradient is usually expressed as the difference in elevation of the water table between two points, divided by the
distance between them. For example, a fall of one metre in water table elevation over a horizontal distance of 50 metres is a gradient of 1:50 (ie 0.02, expressed as a fraction). 3 The hydrological cycle is the circulation of water in various phases through the atmosphere, over and under the
earth’s surface, to the oceans, and back to the atmosphere. The cycle is solar-powered. Because water is a solvent it dissolves elements, and geochemistry is a fundamental part of the cycle, which is a flux for water, energy, and chemicals. Water enters the land-based cycle as precipitation; it leaves as surface streamflow (runoff) or evapotranspiration. The route which groundwater takes from a recharge point to a discharge point is a flow path.
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rock, gravity-driven groundwater system expected to be present at Riley are depicted schematically in Figure 1.2. In Figure 1.2, the hydraulic heads in the recharge areas are relatively high and decrease with depth. In discharge areas, the energy and flow conditions are reversed: heads are low and increase with depth. In between, the throughflow is almost horizontal as shown by the steeply dipping equipotential lines. Figure 1.2 also illustrates the concept of a groundwater system
5 – fundamental to understanding practical
problems like open pit mining, or the surface mining proposed at Riley. Given the relatively subdued relief of the area, it can be expected that the near-surface dominant groundwater flows to depths of the order of a few tens of metres or so will be as local systems, with recharge on elevated areas discharging to streams like Riley Creek. However, at greater depths (well below likely mining depths) the dominant groundwater flows will become increasingly intermediate and then regional in nature. It is therefore important to recognise the local site in the context of the larger groundwater system.
Volume of groundwater flow
The groundwater flow through a unit area (eg one square metre) of an aquifer is determined by the aquifer hydraulic conductivity and the water table gradient, and is calculated from Darcy’s Law: Flow = hydraulic conductivity x gradient.
Rate of groundwater travel
The rate at which groundwater travels through an aquifer is determined by the aquifer hydraulic conductivity, the water table gradient, and the aquifer porosity (expressed as a fraction). Rate of flow = hydraulic conductivity x gradient ⁄ effective porosity
6.
4 Locally (outcrop size or larger), the aquifer is probably confined by unjointed rock or clay weathering products or
both. At increasing larger scales, the aquifer is unconfined. 5 Sophocleous (2004) cited in Figure 11 defines a groundwater system as “a set of groundwater flow paths with
common recharge and discharge areas. Flow systems are dependent on the hydrogeologic properties of the soil/rock material, and landscape position. Areas of steep or undulating relief tend to have dominant local flow systems (discharging to nearby topographic lows such as ponds and streams). Areas of gently sloping or nearly flat relief tend to have dominant regional flow systems (discharging at much greater distances than local systems in major topographic lows or oceans).” A three-dimensional closed groundwater flow system that contains all the flow paths is called the groundwater basin. 6 For example, if the aquifer permeability is 2m
3/day/m
2, the gradient is 0.01 and the effective porosity is 0.1, the rate
of flow would be 2 x 0.01 ⁄ 0.1 = 0.2m/day.
Figure 1.1. Aspects of the land-based hydrological cycle.
Channel flow
Riley Creek (Channel flow)
Overland flow
Streamflow
Precipitation
Evapotranspiration
Unsaturated zone
Water table
Infiltration
Groundwater recharge
Groundwater flow system
Equipotential line
Flow line
Saturated zone
Groundwater discharge
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Groundwater quality Groundwater acquires soluble matter from the aquifer in which it is stored, and through which it moves. Generally, the longer the water remains in the aquifer, the more soluble constituents it acquires, and the poorer its quality. So, other things being equal, aquifers with relatively high hydraulic conductivity tend to have better quality water than low hydraulic conductivity aquifers. Also, other things being equal, better quality groundwater is found in aquifers in high rainfall areas, where groundwater recharges the aquifer more frequently, and aquifers are “flushed” more often. In shallow unconfined aquifers, it is usual to find better quality groundwater near the water table where direct infiltration of rain has occurred. Quality typically decreases with depth. A common measure of groundwater quality (‘salinity’) is its Total Dissolved Solids (TDS), expressed in milligrams per litre (mg/L; essentially the same as the older measure, parts per million, ppm). Typical TDS ranges of waters are: TDS (mg/L) Tasmanian rain <50 Tasmanian river water <100 Drinking water starts to have ‘taste’ 250 – 500 Generally accepted desirable upper limit for drinking water 1,000 Range of commercially available mineral waters 100 – 1,500 Groundwater in coastal sands 450 – 800 Sea water 34,000
Regional system
Intermediate system
recharge discharge
discharge
discharge
recharge
recharge
discharge
Lake
Local system
Flow line
Flow line
Equipotential line
pH increases
Eh+
Eh-
Eh+ Hydraulic head high and decreasing with
depth
Salinity increases
Moisture deficiency
Moisture
surplus
Cl +ΔT
-ΔT SO4
Eh+, Eh-
-ΔT, +ΔT
Quasi-stagnant zone: increased salinity
Hydraulic trap: accumulation of transported matter and heat
Redox conditions: oxidising, reducing
Geothermal temperature and gradient anomaly: negative, positive
HCO3
Figure 1.2. Fundamentals of groundwater hydrology in a gravity-driven groundwater system like Riley. Adapted from Sophocleous (2004)
Hydraulic head low and increasing with
depth Throughflow
A B
Groundwater conditions at recharge point A
In recharge areas (at left), the hydraulic heads are relatively high and decrease with depth, as shown by the water levels in two adjacent piezometers. In discharge areas (at right), the energy and flow conditions are reversed: heads are low and increase with depth.
Groundwater conditions at discharge point B
Land surface Land surface
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ATTACHMENT 2: LAB REPORTS, SURFACE WATER SAMPLING 14 June 2012
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ATTACHMENT 2 (8 pages including this page)
Surface water sampling event at Riley Transmittal form and laboratory report
Analytical Services Tasmania report 53835 (4) Sampled: 2 May 2012
Received at AST lab 4 May 2012 AST final report dated 7 June 2012
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ATTACHMENT 2: LAB REPORTS, SURFACE WATER SAMPLING 14 June 2012
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Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 2: LAB REPORTS, SURFACE WATER SAMPLING 14 June 2012
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Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 2: LAB REPORTS, SURFACE WATER SAMPLING 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
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Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 2: LAB REPORTS, SURFACE WATER SAMPLING 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
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Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 2: LAB REPORTS, SURFACE WATER SAMPLING 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
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Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 2: LAB REPORTS, SURFACE WATER SAMPLING 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
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Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 2: LAB REPORTS, SURFACE WATER SAMPLING 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
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Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 3: TABLES OF SURFACE WATER ANALYSES 14 June 2012
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ATTACHMENT 3 (8 pages including this page)
Tables of surface water analyses
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ATTACHMENT 3: TABLES OF SURFACE WATER ANALYSES 14 June 2012
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Locations of surface water sampling points
RYWS1 Three Mile Creek, 20m N of its confluence with the larger Trinder Creek, and downstream of proposed mining operations in Area A
RYWS2 Riley Creek, 50m N of its confluence with the larger Trinder Creek, and downstream of proposed mining operations in Areas A and B
RYWS3 Trinder Creek, 20m upstream of its confluence with Riley Creek, and downstream of proposed mining operations in Area C
RYWS4 Sweeney Creek where it crosses under the Pieman Road, and downstream of proposed mining operations in Area D. Includes catchment of Gold Creek.
RYWS5 Trinder Creek upstream of proposed mining operations in Area C.
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RYSW1Three Mile Creek downstream (20m N of confluence with Trinder Creek)Easting (GDA94) 367010mE
Northing (GDA94) 5376770mN
Elevation (approx) 175mASL
Event 1 1 2 3 4 5 6 7 8 9 10 11
Sampling date 2/5/12 Duplicate
Time 1315 of
Lab report # 53835 2/5/12Sampler WCCPL WCCPL
Field parameters
Flow L/sec 10 10
Flow m/sec
pH 7.4 7.4
EC µS/cm 196 196
Eh mV 26 26
DO mg/L 12.0 12.0
Turbidity NTU
Temperature 0C 10.3 10.3
Lab results
pH 7.2 7.5
EC µS/cm 217 217
TDS mg/L 116 116
TSS mg/L 2 <1
Colour apparent CU 28 29
Colour true CU 13 15
Turbidity NTU
Alkalinity H2O2 mgCaCO3/L
Alkalinity CO3 mgCaCO3/L <2 <2
Alkalinity HCO3 mgCaCO3/L 78 79
Total Alkalinity mgCaCO3/L
Acidity mgCaCO3/L <3 <3
Chloride mg/L 17.7 17.8
Sulphate mg/L 3.2 3.1
Ammonia mg-N/L 0.002 0.002
Nitrate mg-N/L 0.052 0.052
Nitrite mg-N/L <0.002 <0.002
Total N mg-N/L 0.15 0.19
P dissolved mg-P/L 0.007 0.006
Total P mg-P/L 0.010 0.009
Ag dissolved µg/L <0.5 <0.5
Ag total µg/L <0.5 <0.5
Al dissolved µg/L 17 16
Al total µg/L 59 62
As dissolved µg/L <1 <1
As total µg/L <1 <1
Ca dissolved mg/L 1.29 1.29
Ca total mg/L 1.31 1.35
Cd dissolved µg/L <0.1 <0.1
Cd total µg/L <0.1 <0.1
Co dissolved µg/L <0.5 <0.5
Co total µg/L <0.5 0.6
Cr dissolved µg/L 4 4
Cr total µg/L 6 6
Cu dissolved µg/L <1 <1
Cu total µg/L 1 1
Fe dissolved µg/L 117 102
Fe total µg/L 256 306
Hg dissolved µg/L <0.05 <0.05
Hg total µg/L <0.05 <0.05
K dissolved mg/L 0.33 0.31
K total mg/L 0.41 0.46
Mg dissolved mg/L 19.4 19.3
Mg total mg/L 19.6 20.2
Mn dissolved µg/L 7.9 7.9
Mn total µg/L 11.0 12.1
Na dissolved mg/L 9.66 9.59
Na total mg/L 9.71 10.2
Ni dissolved µg/L 44.2 43.6
Ni total µg/L 48.4 50.5
Pb dissolved µg/L <0.5 <0.5
Pb total µg/L <0.5 <0.5
Sb dissolved µg/L <0.5 <0.5
Sb total µg/L <0.5 <0.5
Se dissolved µg/L <5 <5
Se total µg/L <5 <5
Sn dissolved* µg/L <1 <1
Sn total* µg/L <1 <1
W dissolved* µg/L <1 <1
W total* µg/L <1 <1
Zn dissolved µg/L 5 2
Zn total µg/L 5 5
TPH µg/L <40 <40
TPH C06-C09 µg/L <10 <10
TPH C10-C14 µg/L <10 <10
TPH C15-C28 µg/L <10 <10
TPH C29-C36 µg/L <10 <10
* Not NATA endorsed analysis. WCCPL = William C. Cromer Pty. Ltd.
Venture Minerals Limited
Riley
Surface water monitoring
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 3: TABLES OF SURFACE WATER ANALYSES 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
45
C C W
C C W
RYSW2Riley Creek downstream (50m upstream from Trinder Creek confluence)Easting (GDA94) 367470mE
Northing (GDA94) 5376550mN
Elevation (approx) 182mASL
Event 1 2 3 4 5 6 7 8 9 10 11 12
Sampling date 2/5/12
Time 1145
Lab report # 53835Sampler WCCPL
Field parameters
Flow L/sec 35
Flow m/sec
pH 7.6
EC µS/cm 190
Eh mV 50
DO mg/L 12.1
Turbidity NTU
Temperature 0C 10.4
Lab results
pH 7.8
EC µS/cm 199
TDS mg/L 111
TSS mg/L <1
Colour apparent CU 12
Colour true CU 1
Turbidity NTU
Alkalinity H2O2 mgCaCO3/L
Alkalinity CO3 mgCaCO3/L <2
Alkalinity HCO3 mgCaCO3/L 74
Total Alkalinity mgCaCO3/L
Acidity mgCaCO3/L <3
Chloride mg/L 16.0
Sulphate mg/L 2.4
Ammonia mg-N/L <0.002
Nitrate mg-N/L 0.016
Nitrite mg-N/L <0.002
Total N mg-N/L 0.06
P dissolved mg-P/L 0.004
Total P mg-P/L <0.005
Ag dissolved µg/L <0.5
Ag total µg/L <0.5
Al dissolved µg/L 7
Al total µg/L 20
As dissolved µg/L <1
As total µg/L <1
Ca dissolved mg/L 0.53
Ca total mg/L 0.52
Cd dissolved µg/L <0.1
Cd total µg/L <0.1
Co dissolved µg/L 0.7
Co total µg/L 1.3
Cr dissolved µg/L 4
Cr total µg/L 6
Cu dissolved µg/L 1
Cu total µg/L 1
Fe dissolved µg/L <20
Fe total µg/L 147
Hg dissolved µg/L <0.05
Hg total µg/L <0.05
K dissolved mg/L 0.16
K total mg/L 0.26
Mg dissolved mg/L 18.8
Mg total mg/L 19.1
Mn dissolved µg/L 5.3
Mn total µg/L 7.4
Na dissolved mg/L 9.24
Na total mg/L 9.70
Ni dissolved µg/L 104
Ni total µg/L 111
Pb dissolved µg/L <0.5
Pb total µg/L <0.5
Sb dissolved µg/L <0.5
Sb total µg/L <0.5
Se dissolved µg/L <5
Se total µg/L <5
Sn dissolved* µg/L <1
Sn total* µg/L <1
W dissolved* µg/L <1
W total* µg/L <1
Zn dissolved µg/L 3
Zn total µg/L 3
TPH µg/L <40
TPH C06-C09 µg/L <10
TPH C10-C14 µg/L <10
TPH C15-C28 µg/L <10
TPH C29-C36 µg/L <10
* Not NATA endorsed analysis. WCCPL = William C. Cromer Pty. Ltd.
Venture Minerals Limited
Riley
Surface water monitoring
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 3: TABLES OF SURFACE WATER ANALYSES 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
46
C C W
C C W
RYSW3Trinder Creek downstream (20m upstream from Riley Creek confluence)Easting (GDA94) 367445mE
Northing (GDA94) 5376510mN
Elevation (approx) 180mASL
Event 1 2 3 4 5 6 7 8 9 10 11 12
Sampling date 2/5/12
Time 1120
Lab report # 53835Sampler WCCPL
Field parameters
Flow L/sec 80
Flow m/sec
pH 7.7
EC µS/cm 135
Eh mV 72
DO mg/L 12.1
Turbidity NTU
Temperature 0C 10.0
Lab results
pH 7.6
EC µS/cm 150
TDS mg/L 112
TSS mg/L 3
Colour apparent CU 322
Colour true CU 283
Turbidity NTU
Alkalinity H2O2 mgCaCO3/L
Alkalinity CO3 mgCaCO3/L <2
Alkalinity HCO3 mgCaCO3/L 48
Total Alkalinity mgCaCO3/L
Acidity mgCaCO3/L <3
Chloride mg/L 15.3
Sulphate mg/L 2.0
Ammonia mg-N/L 0.010
Nitrate mg-N/L <0.002
Nitrite mg-N/L 0.006
Total N mg-N/L 0.45
P dissolved mg-P/L 0.003
Total P mg-P/L 0.009
Ag dissolved µg/L <0.5
Ag total µg/L <0.5
Al dissolved µg/L 214
Al total µg/L 325
As dissolved µg/L <1
As total µg/L <1
Ca dissolved mg/L 0.85
Ca total mg/L 0.83
Cd dissolved µg/L <0.1
Cd total µg/L <0.1
Co dissolved µg/L 0.6
Co total µg/L 1.5
Cr dissolved µg/L 6
Cr total µg/L 9
Cu dissolved µg/L 1
Cu total µg/L 1
Fe dissolved µg/L 326
Fe total µg/L 605
Hg dissolved µg/L <0.05
Hg total µg/L <0.05
K dissolved mg/L 0.20
K total mg/L 0.25
Mg dissolved mg/L 13.0
Mg total mg/L 13.2
Mn dissolved µg/L 6.4
Mn total µg/L 15.3
Na dissolved mg/L 8.73
Na total mg/L 8.92
Ni dissolved µg/L 42.4
Ni total µg/L 48.5
Pb dissolved µg/L <0.5
Pb total µg/L <0.5
Sb dissolved µg/L <0.5
Sb total µg/L <0.5
Se dissolved µg/L <5
Se total µg/L <5
Sn dissolved* µg/L <1
Sn total* µg/L <1
W dissolved* µg/L <1
W total* µg/L <1
Zn dissolved µg/L 4
Zn total µg/L 5
TPH µg/L <40
TPH C06-C09 µg/L <10
TPH C10-C14 µg/L <10
TPH C15-C28 µg/L <10
TPH C29-C36 µg/L <10
* Not NATA endorsed analysis. WCCPL = William C. Cromer Pty. Ltd.
Venture Minerals Limited
Riley
Surface water monitoring
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 3: TABLES OF SURFACE WATER ANALYSES 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
47
C C W
C C W
RYSW4Sweeney Creek downstream (1m upstream from S end of culvert beneath Pieman Road crossing)Easting (GDA94) 368730mE
Northing (GDA94) 5379000mN
Elevation (approx) 200mASL
Event 1 2 3 4 5 6 7 8 9 10 11 12
Sampling date 2/5/12
Time 1700
Lab report # 53835Sampler WCCPL
Field parameters
Flow L/sec 20
Flow m/sec
pH 7.2
EC µS/cm 202
Eh mV 56
DO mg/L 12.9
Turbidity NTU
Temperature 0C 9.9
Lab results
pH 7.5
EC µS/cm 218
TDS mg/L 126
TSS mg/L 2
Colour apparent CU 78
Colour true CU 69
Turbidity NTU
Alkalinity H2O2 mgCaCO3/L
Alkalinity CO3 mgCaCO3/L <2
Alkalinity HCO3 mgCaCO3/L 80
Total Alkalinity mgCaCO3/L
Acidity mgCaCO3/L 4
Chloride mg/L 16.4
Sulphate mg/L 3.5
Ammonia mg-N/L 0.003
Nitrate mg-N/L <0.002
Nitrite mg-N/L 0.003
Total N mg-N/L 0.22
P dissolved mg-P/L 0.004
Total P mg-P/L 0.008
Ag dissolved µg/L <0.5
Ag total µg/L <0.5
Al dissolved µg/L 57
Al total µg/L 163
As dissolved µg/L <1
As total µg/L <1
Ca dissolved mg/L 0.55
Ca total mg/L 0.62
Cd dissolved µg/L <0.1
Cd total µg/L <0.1
Co dissolved µg/L 0.8
Co total µg/L 2.3
Cr dissolved µg/L 4
Cr total µg/L 6
Cu dissolved µg/L 1
Cu total µg/L 2
Fe dissolved µg/L 245
Fe total µg/L 868
Hg dissolved µg/L <0.05
Hg total µg/L <0.05
K dissolved mg/L 0.22
K total mg/L 0.32
Mg dissolved mg/L 21.0
Mg total mg/L 21.3
Mn dissolved µg/L 8.5
Mn total µg/L 25.0
Na dissolved mg/L 9.33
Na total mg/L 9.47
Ni dissolved µg/L 65.6
Ni total µg/L 80.9
Pb dissolved µg/L <0.5
Pb total µg/L <0.5
Sb dissolved µg/L <0.5
Sb total µg/L <0.5
Se dissolved µg/L <5
Se total µg/L <5
Sn dissolved* µg/L <1
Sn total* µg/L <1
W dissolved* µg/L <1
W total* µg/L <1
Zn dissolved µg/L 8
Zn total µg/L 11
TPH µg/L <40
TPH C06-C09 µg/L <10
TPH C10-C14 µg/L <10
TPH C15-C28 µg/L <10
TPH C29-C36 µg/L <10
* Not NATA endorsed analysis. WCCPL = William C. Cromer Pty. Ltd.
Venture Minerals Limited
Riley
Surface water monitoring
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 3: TABLES OF SURFACE WATER ANALYSES 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
48
C C W
C C W
RYSW5Trinder Creek upstream; 1,500m bearing 82
0 from Riley Creek confluence
Easting (GDA94) 368940mE
Northing (GDA94) 5376755mN
Elevation (approx) 220mASL
Event 1 2 3 4 5 6 7 8 9 10 11 12
Sampling date 2/5/12
Time 1500
Lab report # 53835Sampler WCCPL
Field parameters
Flow L/sec 13
Flow m/sec
pH 7.5
EC µS/cm 296
Eh mV 90
DO mg/L 11.5
Turbidity NTU
Temperature 0C 10.6
Lab results
pH 7.7
EC µS/cm 378
TDS mg/L 190
TSS mg/L <1
Colour apparent CU 24
Colour true CU 21
Turbidity NTU
Alkalinity H2O2 mgCaCO3/L
Alkalinity CO3 mgCaCO3/L <2
Alkalinity HCO3 mgCaCO3/L 168
Total Alkalinity mgCaCO3/L
Acidity mgCaCO3/L 3
Chloride mg/L 15.5
Sulphate mg/L 2.0
Ammonia mg-N/L <0.002
Nitrate mg-N/L 0.004
Nitrite mg-N/L <0.002
Total N mg-N/L 0.10
P dissolved mg-P/L 0.005
Total P mg-P/L 0.006
Ag dissolved µg/L <0.5
Ag total µg/L <0.5
Al dissolved µg/L <5
Al total µg/L 10
As dissolved µg/L <1
As total µg/L <1
Ca dissolved mg/L 0.47
Ca total mg/L 0.46
Cd dissolved µg/L <0.1
Cd total µg/L <0.1
Co dissolved µg/L <0.5
Co total µg/L 0.7
Cr dissolved µg/L 4
Cr total µg/L 5
Cu dissolved µg/L <1
Cu total µg/L <1
Fe dissolved µg/L <20
Fe total µg/L 178
Hg dissolved µg/L <0.05
Hg total µg/L <0.05
K dissolved mg/L 0.16
K total mg/L 0.19
Mg dissolved mg/L 41.3
Mg total mg/L 42.1
Mn dissolved µg/L 2.2
Mn total µg/L 4.1
Na dissolved mg/L 8.76
Na total mg/L 8.94
Ni dissolved µg/L 80.9
Ni total µg/L 89.9
Pb dissolved µg/L <0.5
Pb total µg/L <0.5
Sb dissolved µg/L <0.5
Sb total µg/L <0.5
Se dissolved µg/L <5
Se total µg/L <5
Sn dissolved* µg/L <1
Sn total* µg/L <1
W dissolved* µg/L <1
W total* µg/L <1
Zn dissolved µg/L 2
Zn total µg/L 3
TPH µg/L <40
TPH C06-C09 µg/L <10
TPH C10-C14 µg/L <10
TPH C15-C28 µg/L <10
TPH C29-C36 µg/L <10
* Not NATA endorsed analysis. WCCPL = William C. Cromer Pty. Ltd.
Venture Minerals Limited
Riley
Surface water monitoring
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 3: TABLES OF SURFACE WATER ANALYSES 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
49
C C W
C C W
All Riley Sites for initial sampling event of 2 May 2012
RYWS1 RYSW1 RYSW2 RYSW3 RYSW4 RYSW5
367010mE 367010mE 367470mE 367445mE 368730mE 368940mE
5376770mN 5376770mN 5376550mN 5376510mN 5379000mN 5376755mN
175mASL 175mASL 182mASL 180mASL 200mASL 220mASL
Sampling date 2/5/12 Duplicate 2/5/12 2/5/12 2/5/12 2/5/12
Time 1315 of 1145 1120 1700 1500
Lab report # 53835 2/5/12 53835 53835 53835 53835
Sampler WCCPL WCCPL WCCPL WCCPL WCCPL WCCPL Min Max Average
Field parameters
Flow L/sec 10 10 35 80 20 13 10 80 28
Flow m/sec
pH 7.4 7.4 7.6 7.7 7.2 7.5 7.2 7.7 7.5
EC µS/cm 196 196 190 135 202 296 135 296 203
Eh mV 26 26 50 72 56 90 26 90 53
DO mg/L 12.0 12.0 12.1 12.1 12.9 11.5 12 13 12
Turbidity NTU
Temperature 0C 10.3 10.3 10.4 10.0 9.9 10.6 9.9 10.6 10.3
Lab results
pH 7.2 7.5 7.8 7.6 7.5 7.7 7.2 7.8 7.6
EC µS/cm 217 217 199 150 218 378 150 378 230
TDS mg/L 116 116 111 112 126 190 111 190 129
TSS mg/L 2 <1 <1 3 2 <1 <1 3 2
Colour apparent CU 28 29 12 322 78 24 12 322 82
Colour true CU 13 15 1 283 69 21 1 283 67
Alkalinity CO3 mgCaCO3/L <2 <2 <2 <2 <2 <2 <2 <2 <2
Alkalinity HCO3 mgCaCO3/L 78 79 74 48 80 168 48 168 88
Total Alkalinity mgCaCO3/L
Acidity mgCaCO3/L <3 <3 <3 <3 4 3 <3 4
Chloride mg/L 17.7 17.8 16.0 15.3 16.4 15.5 15 18 16
Sulphate mg/L 3.2 3.1 2.4 2.0 3.5 2.0 2 4 3
Ammonia mg-N/L 0.002 0.002 <0.002 0.010 0.003 <0.002 <0.002 0.010
Nitrate mg-N/L 0.052 0.052 0.016 <0.002 <0.002 0.004 <0.002 0.052
Nitrite mg-N/L <0.002 <0.002 <0.002 0.006 0.003 <0.002 <0.002 0.006
Total N mg-N/L 0.15 0.19 0.06 0.45 0.22 0.10 0.06 0.45
P dissolved mg-P/L 0.007 0.006 0.004 0.003 0.004 0.005 0.003 0.007
Total P mg-P/L 0.010 0.009 <0.005 0.009 0.008 0.006 0.006 0.010
Ag dissolved µg/L <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5
Ag total µg/L <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5
Al dissolved µg/L 17 16 7 214 57 <5 7 214 62
Al total µg/L 59 62 20 325 163 10 10 325 107
As dissolved µg/L <1 <1 <1 <1 <1 <1 <1 <1 <1
As total µg/L <1 <1 <1 <1 <1 <1 <1 <1 <1
Ca dissolved mg/L 1.29 1.29 0.53 0.85 0.55 0.47 0.47 1.29 0.83
Ca total mg/L 1.31 1.35 0.52 0.83 0.62 0.46 0.46 1.35 0.85
Cd dissolved µg/L <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1
Cd total µg/L <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1
Co dissolved µg/L <0.5 <0.5 0.7 0.6 0.8 <0.5 <0.5 0.80 0.70
Co total µg/L <0.5 0.6 1.3 1.5 2.3 0.7 <0.5 2.3 1.3
Cr dissolved µg/L 4 4 4 6 4 4 4 6 4
Cr total µg/L 6 6 6 9 6 5 5 9 6
Cu dissolved µg/L <1 <1 1 1 1 <1 <1 1 1
Cu total µg/L 1 1 1 1 2 <1 <1 2 1
Fe dissolved µg/L 117 102 <20 326 245 <20 <20 326 198
Fe total µg/L 256 306 147 605 868 178 147 868 393
Hg dissolved µg/L <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05
Hg total µg/L <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05
K dissolved mg/L 0.33 0.31 0.16 0.20 0.22 0.16 0.2 0.3 0.2
K total mg/L 0.41 0.46 0.26 0.25 0.32 0.19 0.2 0.5 0.3
Mg dissolved mg/L 19.4 19.3 18.8 13.0 21.0 41.3 13 41 22
Mg total mg/L 19.6 20.2 19.1 13.2 21.3 42.1 13 42 23
Mn dissolved µg/L 7.9 7.9 5.3 6.4 8.5 2.2 2 9 6
Mn total µg/L 11.0 12.1 7.4 15.3 25.0 4.1 4 25 12
Na dissolved mg/L 9.66 9.59 9.24 8.73 9.33 8.76 9 10 9
Na total mg/L 9.71 10.2 9.70 8.92 9.47 8.94 9 10 9
Ni dissolved µg/L 44.2 43.6 104 42.4 65.6 80.9 42 104 63
Ni total µg/L 48.4 50.5 111 48.5 80.9 89.9 48 111 72
Pb dissolved µg/L <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5
Pb total µg/L <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5
Sb dissolved µg/L <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5
Sb total µg/L <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5
Se dissolved µg/L <5 <5 <5 <5 <5 <5 <5 <5 <5
Se total µg/L <5 <5 <5 <5 <5 <5 <5 <5 <5
Sn dissolved* µg/L <1 <1 <1 <1 <1 <1 <1 <1 <1
Sn total* µg/L <1 <1 <1 <1 <1 <1 <1 <1 <1
W dissolved* µg/L <1 <1 <1 <1 <1 <1 <1 <1 <1
W total* µg/L <1 <1 <1 <1 <1 <1 <1 <1 <1
Zn dissolved µg/L 5 2 3 4 8 2 2 8 4
Zn total µg/L 5 5 3 5 11 3 3 11 5
TPH µg/L <40 <40 <40 <40 <40 <40 <40 <40 <40
TPH C06-C09 µg/L <10 <10 <10 <10 <10 <10 <10 <10 <10
TPH C10-C14 µg/L <10 <10 <10 <10 <10 <10 <10 <10 <10
TPH C15-C28 µg/L <10 <10 <10 <10 <10 <10 <10 <10 <10
TPH C29-C36 µg/L <10 <10 <10 <10 <10 <10 <10 <10 <10
* Not NATA endorsed analysis. WCCPL = William C. Cromer Pty. Ltd.
Venture Minerals Limited
Riley
Surface water monitoring
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 4: MONITORING BORE LOGS AND SLUG TESTING 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
50 C C W
C C W
Summary of monitoring bores
Hole ID RYWB001 RYWB002 RYWB003 RYWB004 RYWB005
Easting (GDA94) 368532 367708 367706 368283 367380
Northing (GDA94) 5378761 5377096 5377096 5377671 5376828
Date drilled 17-Apr-12 18-Apr-12 19-Apr-12 14-May-12 15-May-12
Collar elevation (mASL) 210 220 220 270 200
Depth (mbg) drilled 12.5 23.1 4.4 18.0 23.0
Estimated yield on drilling (L/sec) 0.04 0.03 dry <0.01 0.03
Standing water level on completion (mbg) 5.3 8.9 dry 15.6 ND
Screened interval (mbg) 9 – 12 16.5 – 19.5 1 – 4 12 – 15 19 – 22
Permeability (slug) tests 4 5 None None None
Slug test interval (mbg) 9 – 12 16.5 – 19.5
Photos of drill returns Yes Yes Yes Yes Yes
Returns retained No Yes No Yes Yes
Field water quality tested No Yes No Yes Yes
Water sample analysed? Yes Yes No Yes Yes
Water level data logger installed? Yes Yes No Yes Yes
mbg = metres below ground
ATTACHMENT 4 (24 pages including this page)
Groundwater monitoring bores Logs, photographs and slug (hydraulic conductivity) test results
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 4: MONITORING BORE LOGS AND SLUG TESTING 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
51 C C W
C C W
RYWB001
Location of groundwater monitoring bore RYWB001, near electricity transmission line, April 2012.
Bore RYWB001
Location of groundwater monitoring bore RYWB001 (large red circle). Base map: www.thelist.tas.gov.au
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 4: MONITORING BORE LOGS AND SLUG TESTING 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
52 C C W
C C W
Hydrogeology borehole log ID RYWB001
Sheet 1 of 1
Project VENTURE MINERALS LTD RILEY Location Approx. 15m S of transmission line
Coordinates
RL
Datum
Inclination
Bearing
Drill type
Equipment
Drill fluid(s)
Hole started
Hole finished
Drilled by
Logged by
Checked by
Materials Soil/rock type, colour, plasticity or particle characteristics, secondary
and minor components
Groundwater quality
Metres
Dep
th
Gra
phic
log
Air lifte
d flo
w
(L/s
ec)
Penetr
ation
Structure, geology and interpretation
Completion details
Casin
g
S
cre
en
G
ravel
S
eal
RL
William C. Cromer Pty. Ltd. Environmental, engineering and groundwater geologists
min
ute
/m
EC
(µS
/cm
)
Cuttin
gs s
ize
(m
m)
Weather -ing
Slig
ht
Mod
Hig
h
Soil
pH
O
RP
(mV
)
D
O
Mg
/L
T
(0C
) C
olo
ur
(descri
ptive
)
Reac
tio
n
to 1
0%
HC
L
Ma
gn
et’
m
Of cutt
ings
None
S
light
Mod
Rapid
Hig
h
Mod
Slig
ht
None
17 April 2012
17 April 2012
Igor Pelka (NTL Drilling)
M. Hocking
W. Cromer
368532mE; 5378761mN
GDA94
Vertical
Approx. 210mASL
GEMCO H22
150mm solid auger; 114mm hammer Atlas Copco 1350/350 comp
Air; hammer oil lubricant
2
4
6
8
10
Water struck approx. 6m
Clayey SAND: yellowish orange
Ordovician Gordon Limestone Formation (extremely weathered sandstone and siltstone)
SWL 3 May 2012 = 4.7mbg
2
4
6
8
10
12
14
16
18
20
22
24
Auger
Hammer
Casin
g:
50m
m C
lass 1
8 P
VC
thre
aded join
ts
EOH at 12.5mbg
Scre
en:
50m
m C
lass 1
8 P
VC
facto
ry-s
lott
ed 0
.4m
m
Gra
vel: s
cre
ened
2-7
mm
rounded q
uart
zite
Seal: B
ento
nite p
elle
ts
All
drill
retu
rns e
xhib
ited s
oil
pro
pert
ies.
No r
ock c
hip
s
Silty clayey SAND: greyish orange
Sandy clayey SILT: greyish orange; grading to clayey SILT: cream orange and grey
Insu
ffic
ien
t flo
w to
te
st
Casin
g s
tick-u
p =
0.5
8m
Ele
ctr
onic
wate
r le
vel data
logger
insta
lled 1
5 M
ay 2
012
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 4: MONITORING BORE LOGS AND SLUG TESTING 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
53 C C W
C C W
12.5m EOH
0 – 1m
RYWB001 Drill returns
1 – 2m
2 – 3m
3 – 4m
4 – 5m
5 – 6m
11 – 12m
10 – 11m
9 – 10m
8 – 9m
6 – 7m
7 – 8m
Scre
ene
d a
nd
pe
rmea
bili
ty
teste
d inte
rva
l 9 –
12
m
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 4: MONITORING BORE LOGS AND SLUG TESTING 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
54 C C W
C C W
RYWB001 Permeability testing of screened interval 9 – 12m (4 tests)
Hydraulic conductivity = 1.0 x 10-5
m/s
= 0.9 m/day
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 4: MONITORING BORE LOGS AND SLUG TESTING 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
55 C C W
C C W
Hydraulic conductivity = 2.08 x10-6
m/s
= 0.2m/day
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 4: MONITORING BORE LOGS AND SLUG TESTING 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
56 C C W
C C W
Hydraulic conductivity = 1.11 x 10-5
m/s
= 1m/day
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 4: MONITORING BORE LOGS AND SLUG TESTING 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
57 C C W
C C W
Hydraulic conductivity = 2.15 x 10-6
m/s
= 0.2m/day
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 4: MONITORING BORE LOGS AND SLUG TESTING 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
58 C C W
C C W
RYWB002 and RYWB003
Bore RYWB002
Location of groundwater monitoring bore RYWB002 (large red circle). Base map: www.thelist.tas.gov.au
Location of groundwater monitoring bores RYWB002 and RYWB003 (1.5m apart), looking south
from main access road.
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 4: MONITORING BORE LOGS AND SLUG TESTING 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
59 C C W
C C W
Hydrogeology borehole log ID RYWB002
Sheet 1 of 1
Project VENTURE MINERALS LTD RILEY Location On main access track
Coordinates
RL
Datum
Inclination
Bearing
Drill type
Equipment
Drill fluid(s)
Hole started
Hole finished
Drilled by
Logged by
Checked by
Materials Soil/rock type, colour, plasticity or particle characteristics, secondary
and minor components
Groundwater quality
Metres
Dep
th
Gra
phic
log
Air lifte
d flo
w
(L/s
ec)
Penetr
ation
Structure, geology and interpretation
Completion details
Casin
g
S
cre
en
G
ravel
S
eal
RL
William C. Cromer Pty. Ltd. Environmental, engineering and groundwater geologists
min
ute
/m
EC
(µS
/cm
)
Cuttin
gs s
ize
(m
m)
Weather -ing
Slig
ht
Mod
Hig
h
Soil
pH
O
RP
(mV
)
D
O
mg
/L
T
(0C
) C
olo
ur
(descri
ptive
)
Reac
tio
n
to 1
0%
HC
L
Ma
gn
et’
m
Of cutt
ings
None
S
light
Mod
Rapid
Hig
h
Mod
Slig
ht
None
18 April 2012
18 April 2012
Igor Pelka (NTL Drilling)
M. Hocking
W. Cromer
367708mE; 5377096mN
GDA94
Vertical
Approx. 220mASL
GEMCO H22
150mm solid auger; 114mm blade bit Atlas Copco 1350/350 comp
Air; water added from 10m
2
4
6
8
10
CLAY: dark orange to reddish brown; strongly ferruginous 0 – 2m; becoming less so with depth, and non- ferruginous below about 6m
Cambrian Wilson River Ultramafic Complex (extremely weathered and serpentinised ultramafics with ferruginous capping)
SWL 0900hrs 19 April 2012 = 10.7mbg
2
4
6
8
10
12
14
16
18
20
22
24
Auger
Blade bit
Casin
g:
50m
m C
lass 1
8 P
VC
thre
aded join
ts
EOH at 23.1mbg
Scre
en:
50m
m C
lass 1
8 P
VC
facto
ry-s
lott
ed 0
.4m
m
Gra
vel: s
cre
ened
2-7
mm
rounded q
uart
zite
Seal: B
ento
nite p
elle
ts
All
drill
retu
rns e
xhib
ited s
oil
pro
pert
ies.
No r
ock c
hip
s
Insufficient flow to test during drilling
Casin
g s
tick-u
p =
0.6
4m
CLAY: orange brown (greyish brown 12-18m); high plasticity
Water struck approx. 10+m
Field parameters measured during sampling from 20m depth
on 2 May 2012
5.5
185
12.5
7.3
80
Ele
ctr
onic
wate
r le
vel data
logger
insta
lled 1
5 M
ay 2
012
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 4: MONITORING BORE LOGS AND SLUG TESTING 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
60 C C W
C C W
0 – 1m
1 – 2m
2 – 3m
3 – 4m
4 – 5m
5 – 6m
11 – 12m
10 – 11m
9 – 10m
8 – 9m
6 – 7m
7 – 8m
12 – 13m
13 – 14m
14 – 15m
15 – 16m
16 – 17m
17 – 18m
18 – 19m
19 – 20m
20 – 21m
21 – 22m
22 – 23m
23.1m EOH
Scre
ene
d a
nd
pe
rmea
bili
ty
teste
d inte
rva
l 19
.5 –
22.5
m
RYWB002 Drill returns (unwashed, unsieved)
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 4: MONITORING BORE LOGS AND SLUG TESTING 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
61 C C W
C C W
RYWB002 Permeability testing of screened interval 19.5 – 22.5m (5 tests)
Hydraulic conductivity = 1.39 x 10-7
m/s
= 0.01m/day
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 4: MONITORING BORE LOGS AND SLUG TESTING 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
62 C C W
C C W
Hydraulic conductivity = 9.69 x 10-8
m/s
= 0.01m/day
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 4: MONITORING BORE LOGS AND SLUG TESTING 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
63 C C W
C C W
Hydraulic conductivity = 3.56 x 10-7
m/s
= 0.03m/day
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 4: MONITORING BORE LOGS AND SLUG TESTING 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
64 C C W
C C W
Hydraulic conductivity = 1.06 x 10-7
m/s
= 0.01m/day
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 4: MONITORING BORE LOGS AND SLUG TESTING 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
65 C C W
C C W
Hydraulic conductivity = 3.54 x 10-7
m/s
= 0.03m/day
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 4: MONITORING BORE LOGS AND SLUG TESTING 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
66 C C W
C C W
RYWB002 and RYWB003
Location of groundwater monitoring bores RYWB002 and RYWB003 (1.5m apart), looking south
from main access road.
Bore RYWB003
Location of groundwater monitoring bore RYWB003 (large red circle). Base map: www.thelist.tas.gov.au
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 4: MONITORING BORE LOGS AND SLUG TESTING 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
67 C C W
C C W
Hydrogeology borehole log ID RYWB003
Sheet 1 of 1
Project VENTURE MINERALS LTD RILEY Location Approx. 1.5m west of RYWB002
Coordinates
RL
Datum
Inclination
Bearing
Drill type
Equipment
Drill fluid(s)
Hole started
Hole finished
Drilled by
Logged by
Checked by
Materials Soil/rock type, colour, plasticity or particle characteristics, secondary
and minor components
Groundwater quality
Metres
Dep
th
Gra
phic
log
Air lifte
d flo
w
(L/s
ec)
Penetr
ation
Structure, geology and interpretation
Completion details
Casin
g
S
cre
en
G
ravel
S
eal
RL
William C. Cromer Pty. Ltd. Environmental, engineering and groundwater geologists
min
ute
/m
EC
(µS
/cm
)
Cuttin
gs s
ize
(m
m)
Weather -ing
Slig
ht
Mod
Hig
h
Soil
pH
O
RP
(mV
)
D
O
mg
/L
T
(0C
) C
olo
ur
(descri
ptive
)
Reac
tio
n
to 1
0%
HC
L
Ma
gn
et’
m
Of cutt
ings
None
S
light
Mod
Rapid
H
igh
M
od
Slig
ht
None
19 April 2012
19 April 2012
Igor Pelka (NTL Drilling)
M. Hocking
W. Cromer
367706mE; 5377096mN
GDA94
Vertical
Approx. 220mASL
GEMCO H22
100mm solid auger;
Air; water added from 10m
2
4
6
8
10
GRAVEL and Clayey GRAVEL: dark orange to reddish brown; strongly ferruginous 0 – 2m; becoming less so with depth
Cambrian Wilson River Ultramafic Complex (ferruginous cap over extremely weathered and serpentinised ultramafics)
2
4
6
8
10
12
14
16
18
20
22
24
Casin
g:
50m
m C
lass 1
8 P
VC
thre
aded join
ts
EOH at 4.4mbg
Scre
en:
50m
m C
lass 1
8 P
VC
facto
ry-s
lott
ed 0
.4m
m
Gra
vel: s
cre
ened
2-7
mm
rounded q
uart
zite
Seal: B
ento
nite p
elle
ts
All
drill
retu
rns e
xhib
ited s
oil
pro
pert
ies.
No r
ock c
hip
s
Hole dry on completion of drilling
Casin
g s
tick-u
p =
0.6
9m
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 4: MONITORING BORE LOGS AND SLUG TESTING 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
68 C C W
C C W
RYWB004
Location of groundwater monitoring bore RYWB004, looking north on main access road to
ridgeline
Bore RYWB004
Location of groundwater monitoring bore RYWB004 (large red circle). Base map: www.thelist.tas.gov.au
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 4: MONITORING BORE LOGS AND SLUG TESTING 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
69 C C W
C C W
Hydrogeology borehole log ID RYWB004
Sheet 1 of 1
Project VENTURE MINERALS LTD RILEY Location On main access road, 50m west of ridge line
Coordinates
RL
Datum
Inclination
Bearing
Drill type
Equipment
Drill fluid(s)
Hole started
Hole finished
Drilled by
Logged by
Checked by
Materials Soil/rock type, colour, plasticity or particle characteristics, secondary
and minor components
Groundwater quality
Metres
Dep
th
Gra
phic
log
Air lifte
d flo
w
(L/s
ec)
Penetr
ation
Structure, geology and interpretation
Completion details
Casin
g
S
cre
en
G
ravel
S
eal
RL
William C. Cromer Pty. Ltd. Environmental, engineering and groundwater geologists
min
ute
/m
EC
(µS
/cm
)
Cuttin
gs s
ize
(m
m)
Weather -ing
Slig
ht
Mod
Hig
h
Soil
pH
O
RP
(mV
)
D
O
mg
/L
T
(0C
) C
olo
ur
(descri
ptive
)
Reac
tio
n
to 1
0%
HC
L
Ma
gn
et’
m
Of cutt
ings
None
S
light
Mod
Rapid
Hig
h
Mod
Slig
ht
None
14 May 2012
14 May 2012
Igor Pelka (NTL Drilling)
W. Cromer
W. Cromer
368283mE; 5377671mN
GDA94
Vertical
Approx. 270mASL
GEMCO H22
150mm solid auger; 114mm blade bit Atlas Copco 1350/350 comp
Air
2
4
6
8
10
Gravelly clayey SILT: orange brown and olive brown; low plasticity; less gravelly below 2m; fines becoming moderately magnetic
Cambrian Wilson River Ultramafic Complex (extremely weathered and serpentinised ultramafics
SWL 0730hrs 15 May 2012 = 15.6mbg
2
4
6
8
10
12
14
16
18
20
22
24
Auger
Blade bit
Casin
g:
50m
m C
lass 1
8 P
VC
thre
aded join
ts
EOH at 18.0mbg
Scre
en:
50m
m C
lass 1
8 P
VC
facto
ry-s
lott
ed 0
.4m
m
Gra
vel: s
cre
ened
2-7
mm
rounded q
uart
zite
Seal: B
ento
nite p
elle
ts
All
drill
retu
rns e
xhib
ited s
oil
pro
pert
ies.
No r
ock c
hip
s
Insufficient flow to test during drilling
Casin
g s
tick-u
p =
0.7
0m
Water struck approx. 3+m
Field parameter measured after completion on 15 May 2012
400
11.4
Ele
ctr
onic
wate
r le
vel data
logger
insta
lled 1
5 M
ay 2
012
SILT: orange brown; trace clay
SILTSTONE: brownish olive grey, hard; with less than 5-10% of returns magnetic
SILT: orange brown; trace clay
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 4: MONITORING BORE LOGS AND SLUG TESTING 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
70 C C W
C C W
RYWB004 Drill returns (unwashed; unsieved)
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 4: MONITORING BORE LOGS AND SLUG TESTING 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
71 C C W
C C W
RYWB005
Location of groundwater monitoring bore RYWB005, looking northeast
Bore RYWB005
Location of groundwater monitoring bore RYWB005 (large red circle). Base map: www.thelist.tas.gov.au
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 4: MONITORING BORE LOGS AND SLUG TESTING 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
72 C C W
C C W
Hydrogeology borehole log ID RYWB005
Sheet 1 of 1
Project VENTURE MINERALS LTD RILEY Location On intersection of two tracks
Coordinates
RL
Datum
Inclination
Bearing
Drill type
Equipment
Drill fluid(s)
Hole started
Hole finished
Drilled by
Logged by
Checked by
Materials Soil/rock type, colour, plasticity or particle characteristics, secondary
and minor components
Groundwater quality
Metres
Dep
th
Gra
phic
log
Air lifte
d flo
w
(L/s
ec)
Penetr
ation
Structure, geology and interpretation
Completion details
Casin
g
S
cre
en
G
ravel
S
eal
RL
William C. Cromer Pty. Ltd. Environmental, engineering and groundwater geologists
min
ute
/m
EC
(µS
/cm
)
Cuttin
gs s
ize
(m
m)
Weather -ing
Slig
ht
Mod
Hig
h
Soil
pH
O
RP
(mV
)
D
O
mg
/L
T
(0C
) C
olo
ur
(descri
ptive
)
Reac
tio
n
to 1
0%
HC
L
Ma
gn
et’
m
Of cutt
ings
None
S
light
Mod
Rapid
Hig
h
Mod
Slig
ht
None
15 May 2012
15 May 2012
Igor Pelka (NTL Drilling)
W. Cromer
W. Cromer
367380mE; 5376828mN
GDA94
Vertical
Approx. 200mASL
GEMCO H22
150mm solid auger; 114mm blade bit Atlas Copco 1350/350 comp
Air
2
4
6
8
10
Silty CLAY: mainly brownish yellow (yellowish brown 3-4m); high plasticity; moisture> plasticity limit; patchy light yellow and cream below 4m
Cambrian Crimson Creek Formation (extremely weathered) 2
4
6
8
10
12
14
16
18
20
22
24
Auger
Blade bit
Casin
g:
50m
m C
lass 1
8 P
VC
thre
aded join
ts
EOH at 23.0mbg
Scre
en:
50m
m C
lass 1
8 P
VC
facto
ry-s
lott
ed 0
.4m
m
Gra
vel: s
cre
ened
2-7
mm
rounded q
uart
zite
Seal: B
ento
nite p
elle
ts
All
drill
retu
rns e
xhib
ited s
oil
pro
pert
ies.
No r
ock c
hip
s
Insufficient flow to test during drilling
Casin
g s
tick-u
p =
0.8
0m
Water probably struck approx. 17.5m; minor inflow
Field parameter measured during airlift on completion on
15 May 2012
70
9.3
Ele
ctr
onic
wate
r le
vel data
logger
insta
lled 1
5 M
ay 2
012
SILTSTONE: purplish brown; highly weathered (close to soil properties)
Slightly harder below 21m
6.5
-73
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 4: MONITORING BORE LOGS AND SLUG TESTING 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
73 C C W
C C W
RYWB005 Drill returns (unwashed; unsieved)
20 m
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 5: GROUNDWATER LAB REPORTS 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
74
C C W
C C W
ATTACHMENT 5 (11 pages including this page)
Groundwater sampling at Riley Transmittal forms and laboratory reports
Analytical Services Tasmania report 53832 (4) Sampled: 3 May 2012
Received at AST lab 3 May 2012 AST final report dated 7 June 2012
Analytical Services Tasmania report 53995 (2)
Sampled: 15 May 2012 Received at AST lab 16 May 2012 AST final report dated 7 June 2012
Bore RYWB003 was dry at the times of sampling
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 5: GROUNDWATER LAB REPORTS 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
75
C C W
C C W
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 5: GROUNDWATER LAB REPORTS 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
76
C C W
C C W
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 5: GROUNDWATER LAB REPORTS 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
77
C C W
C C W
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 5: GROUNDWATER LAB REPORTS 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
78
C C W
C C W
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 5: GROUNDWATER LAB REPORTS 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
79
C C W
C C W
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 5: GROUNDWATER LAB REPORTS 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
80
C C W
C C W
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 5: GROUNDWATER LAB REPORTS 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
81
C C W
C C W
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 5: GROUNDWATER LAB REPORTS 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
82
C C W
C C W
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 5: GROUNDWATER LAB REPORTS 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
83
C C W
C C W
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 5: GROUNDWATER LAB REPORTS 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
84
C C W
C C W
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 6: TABLES OF GROUNDWATER ANALYSES 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
85
85
C C W
C C W
ATTACHMENT 6 (8 pages including this page)
Tables of groundwater analyses
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 6: TABLES OF GROUNDWATER ANALYSES 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
86
86
C C W
C C W
Locations of groundwater bores
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 6: TABLES OF GROUNDWATER ANALYSES 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
87
87
C C W
C C W
RYWB001Easting (GDA94) 368532mE
Northing (GDA94) 5378761mN
Elevation (approx) 210mASL
Event 1 2 3 4 5 6 7 8 9 10 11 12
Sampling date 3/5/12
Time 0812
Lab report # 53832
Sampler WCCPL
Sampling
Bore depth mbg 12.5
Standing water level mbg 5.3
Method Low flow
Volume extracted L 50
Field parameters
pH 5.2
EC µS/cm 118
Eh mV 103
DO mg/L 1.4
Temperature 0C 11.8
Lab results
pH 5.5
EC µS/cm 134
TDS mg/L 90
TSS mg/L 338
Colour apparent CU >500
Colour true CU 22
Turbidity NTU
Alkalinity H2O2 mgCaCO3/L
Alkalinity CO3 mgCaCO3/L <2
Alkalinity HCO3 mgCaCO3/L 12
Total Alkalinity mgCaCO3/L
Acidity mgCaCO3/L 88
Chloride mg/L 17.4
Sulphate mg/L 16.1
Ammonia mg-N/L 0.005
Nitrate mg-N/L 0.005
Nitrite mg-N/L <0.002
Total N mg-N/L 0.09
P dissolved mg-P/L 0.003
Total P mg-P/L 0.030
Ag dissolved µg/L <0.5
Ag total µg/L <0.5
Al dissolved µg/L 21
Al total µg/L 5,560
As dissolved µg/L <1
As total µg/L 2
Ca dissolved mg/L 0.95
Ca total mg/L 1.14
Cd dissolved µg/L <0.1
Cd total µg/L <0.1
Co dissolved µg/L 23
Co total µg/L 29
Cr dissolved µg/L <1
Cr total µg/L 11
Cu dissolved µg/L <1
Cu total µg/L 6
Fe dissolved µg/L 209
Fe total µg/L 9,000
Hg dissolved µg/L <0.05
Hg total µg/L <0.05
K dissolved mg/L 1.05
K total mg/L 1.63
Mg dissolved mg/L 3.41
Mg total mg/L 5.40
Mn dissolved µg/L 243
Mn total µg/L 333
Na dissolved mg/L 15.9
Na total mg/L 16.0
Ni dissolved µg/L 17.1
Ni total µg/L 27.7
Pb dissolved µg/L <0.5
Pb total µg/L 4.2
Sb dissolved µg/L <0.5
Sb total µg/L <0.5
Se dissolved µg/L <5
Se total µg/L <5
Sn dissolved* µg/L <1
Sn total* µg/L <1
W dissolved* µg/L <1
W total* µg/L <1
Zn dissolved µg/L 24
Zn total µg/L 42
TPH µg/L <40
TPH C06-C09 µg/L <10
TPH C10-C14 µg/L <10
TPH C15-C28 µg/L <10
TPH C29-C36 µg/L <10
* Not NATA endorsed analysis
WCCPL = William C. Cromer Pty. Ltd.
Blank space indicates an analyte was not requested
Venture Minerals Limited
Riley
Groundwater monitoring
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 6: TABLES OF GROUNDWATER ANALYSES 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
88
88
C C W
C C W
RYWB002Easting (GDA94) 367708mE
Northing (GDA94) 5377096mN
Elevation (approx) 220mASL
Event 1 2 3 4 5 6 7 8 9 10 11 12
Sampling date 3/5/12
Time 1022
Lab report # 53832Sampler WCCPL
Sampling
Bore depth mbg 23.1
Standing water level mbg 8.9
Method Low flow
Volume extracted L 50
Field parameters
pH 5.5
EC µS/cm 185
Eh mV 80
DO mg/L 7.7
Temperature 0C 12.5
Lab results
pH 6.1
EC µS/cm 185
TDS mg/L 107
TSS mg/L 87
Colour apparent CU 494
Colour true CU <1
Turbidity NTU
Alkalinity H2O2 mgCaCO3/L
Alkalinity CO3 mgCaCO3/L <2
Alkalinity HCO3 mgCaCO3/L 37
Total Alkalinity mgCaCO3/L
Acidity mgCaCO3/L 63
Chloride mg/L 25.9
Sulphate mg/L 10.2
Ammonia mg-N/L 0.035
Nitrate mg-N/L 0.022
Nitrite mg-N/L <0.002
Total N mg-N/L 0.10
P dissolved mg-P/L 0.003
Total P mg-P/L 0.007
Ag dissolved µg/L <0.5
Ag total µg/L <0.5
Al dissolved µg/L <5
Al total µg/L 891
As dissolved µg/L <1
As total µg/L <1
Ca dissolved mg/L 1.74
Ca total mg/L 1.96
Cd dissolved µg/L <0.1
Cd total µg/L <0.1
Co dissolved µg/L 19.8
Co total µg/L 82.5
Cr dissolved µg/L 160
Cr total µg/L 239
Cu dissolved µg/L <1
Cu total µg/L 1
Fe dissolved µg/L 51
Fe total µg/L 1,410
Hg dissolved µg/L <0.05
Hg total µg/L <0.05
K dissolved mg/L 0.21
K total mg/L 0.38
Mg dissolved mg/L 7.22
Mg total mg/L 7.78
Mn dissolved µg/L 56.2
Mn total µg/L 365
Na dissolved mg/L 22.8
Na total mg/L 21.6
Ni dissolved µg/L 517
Ni total µg/L 649
Pb dissolved µg/L <0.5
Pb total µg/L 1.1
Sb dissolved µg/L <0.5
Sb total µg/L <0.5
Se dissolved µg/L <5
Se total µg/L <5
Sn dissolved* µg/L <1
Sn total* µg/L <1
W dissolved* µg/L <1
W total* µg/L <1
Zn dissolved µg/L 8
Zn total µg/L 13
TPH µg/L <40
TPH C06-C09 µg/L <10
TPH C10-C14 µg/L <10
TPH C15-C28 µg/L <10
TPH C29-C36 µg/L <10
* Not NATA endorsed analysis
WCCPL = William C. Cromer Pty. Ltd.Blank space indicates an analyte was not requested
Venture Minerals Limited
Riley
Groundwater monitoring
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 6: TABLES OF GROUNDWATER ANALYSES 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
89
89
C C W
C C W
RYWB003Easting (GDA94) 367706mE
Northing (GDA94) 5377096mN
Elevation (approx) 220mASL
Event 1 2 3 4 5 6 7 8 9 10 11 12
Sampling date 3/5/12
Time 1025
Lab report #Sampler WCCPL
Sampling
Bore depth mbg 4.4
Standing water level mbg dry
Method
Volume extracted L
Field parameters
pH
EC µS/cm
Eh mV
DO mg/L
Temperature 0C
Lab results
pH
EC µS/cm
TDS mg/L
TSS mg/L
Colour apparent CU
Colour true CU
Turbidity NTU
Alkalinity H2O2 mgCaCO3/L
Alkalinity CO3 mgCaCO3/L
Alkalinity HCO3 mgCaCO3/L
Total Alkalinity mgCaCO3/L
Acidity mgCaCO3/L
Chloride mg/L
Sulphate mg/L
Ammonia mg-N/L
Nitrate mg-N/L
Nitrite mg-N/L
Total N mg-N/L
P dissolved mg-P/L
Total P mg-P/L
Ag dissolved µg/L
Ag total µg/L
Al dissolved µg/L
Al total µg/L
As dissolved µg/L
As total µg/L
Ca dissolved mg/L
Ca total mg/L
Cd dissolved µg/L
Cd total µg/L
Co dissolved µg/L
Co total µg/L
Cr dissolved µg/L
Cr total µg/L
Cu dissolved µg/L
Cu total µg/L
Fe dissolved µg/L
Fe total µg/L
Hg dissolved µg/L
Hg total µg/L
K dissolved mg/L
K total mg/L
Mg dissolved mg/L
Mg total mg/L
Mn dissolved µg/L
Mn total µg/L
Na dissolved mg/L
Na total mg/L
Ni dissolved µg/L
Ni total µg/L
Pb dissolved µg/L
Pb total µg/L
Sb dissolved µg/L
Sb total µg/L
Se dissolved µg/L
Se total µg/L
Sn dissolved* µg/L
Sn total* µg/L
W dissolved* µg/L
W total* µg/L
Zn dissolved µg/L
Zn total µg/L
TPH µg/L
TPH C06-C09 µg/L
TPH C10-C14 µg/L
TPH C15-C28 µg/L
TPH C29-C36 µg/L
* Not NATA endorsed analysis
WCCPL = William C. Cromer Pty. Ltd.Blank space indicates an analyte was not requested
Venture Minerals Limited
Riley
Groundwater monitoring
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 6: TABLES OF GROUNDWATER ANALYSES 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
90
90
C C W
C C W
RYWB004Easting (GDA94) 368283mE
Northing (GDA94) 5377671mN
Elevation (approx) 270mASL
Event 1 2 3 4 5 6 7 8 9 10 11 12 13
Sampling date 15/5/12
Time 1300
Lab report # 53995Sampler WCCPL
Sampling
Bore depth mbg 18.0
Standing water level mbg 15.6
Method Low flow
Volume extracted L 20
Field parameters
pH
EC µS/cm 400
Eh mV
DO mg/L
Temperature 0C 11.4
Lab results
pH 6.8
EC µS/cm 417
TDS mg/L 290
TSS mg/L
Colour apparent CU
Colour true CU <1
Turbidity NTU
Alkalinity H2O2 mgCaCO3/L
Alkalinity CO3 mgCaCO3/L <2
Alkalinity HCO3 mgCaCO3/L 84
Total Alkalinity mgCaCO3/L 84
Acidity mgCaCO3/L 29
Chloride mg/L 18.4
Sulphate mg/L 108
Ammonia mg-N/L 0.006
Nitrate mg-N/L 0.018
Nitrite mg-N/L 0.002
Total N mg-N/L 0.09
P dissolved mg-P/L <0.5
Total P mg-P/L <0.005
Ag dissolved µg/L <0.5
Ag total µg/L
Al dissolved µg/L <5
Al total µg/L
As dissolved µg/L <1
As total µg/L
Ca dissolved mg/L 13.4
Ca total mg/L
Cd dissolved µg/L <0.1
Cd total µg/L
Co dissolved µg/L 1.0
Co total µg/L
Cr dissolved µg/L 60
Cr total µg/L
Cu dissolved µg/L <1
Cu total µg/L
Fe dissolved µg/L <20
Fe total µg/L
Hg dissolved µg/L <0.05
Hg total µg/L
K dissolved mg/L 0.54
K total mg/L
Mg dissolved mg/L 32.6
Mg total mg/L
Mn dissolved µg/L <0.5
Mn total µg/L
Na dissolved mg/L 9.90
Na total mg/L
Ni dissolved µg/L 261
Ni total µg/L
Pb dissolved µg/L <0.5
Pb total µg/L
Sb dissolved µg/L <0.5
Sb total µg/L
Se dissolved µg/L <5
Se total µg/L
Sn dissolved* µg/L <1
Sn total* µg/L
W dissolved* µg/L <1
W total* µg/L
Zn dissolved µg/L <1
Zn total µg/L
TPH µg/L <40
TPH C06-C09 µg/L <10
TPH C10-C14 µg/L <10
TPH C15-C28 µg/L <10
TPH C29-C36 µg/L <10
* Not NATA endorsed analysis
WCCPL = William C. Cromer Pty. Ltd.
Blank space indicates an analyte was not requested
Venture Minerals Limited
Riley
Groundwater monitoring
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 6: TABLES OF GROUNDWATER ANALYSES 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
91
91
C C W
C C W
RYWB005Easting (GDA94) 367380mE
Northing (GDA94) 5376828mN
Elevation (approx) 200mASL
Event 1 2 3 4 5 6 7 8 9 10 11 12 13
Sampling date 15/5/12
Time 1330
Lab report # 53995Sampler WCCPL
Sampling
Bore depth mbg 23.0
Standing water level mbg 17.5
Method Air lift
Volume extracted L 20
Field parameters
pH 6.5
EC µS/cm 70
Eh mV -73
DO mg/L
Temperature 0C 9.3
Lab results
pH 7
EC µS/cm 78
TDS mg/L 63
TSS mg/L
Colour apparent CU
Colour true CU <1
Turbidity NTU
Alkalinity H2O2 mgCaCO3/L
Alkalinity CO3 mgCaCO3/L <2
Alkalinity HCO3 mgCaCO3/L 3
Total Alkalinity mgCaCO3/L 3
Acidity mgCaCO3/L <3
Chloride mg/L 17.2
Sulphate mg/L 3.6
Ammonia mg-N/L 0.004
Nitrate mg-N/L 0.055
Nitrite mg-N/L <0.002
Total N mg-N/L 0.09
P dissolved mg-P/L <0.5
Total P mg-P/L <0.009
Ag dissolved µg/L <0.5
Ag total µg/L
Al dissolved µg/L <5
Al total µg/L
As dissolved µg/L <1
As total µg/L
Ca dissolved mg/L 0.62
Ca total mg/L
Cd dissolved µg/L <0.1
Cd total µg/L
Co dissolved µg/L 5.4
Co total µg/L
Cr dissolved µg/L <1
Cr total µg/L
Cu dissolved µg/L <1
Cu total µg/L
Fe dissolved µg/L <20
Fe total µg/L
Hg dissolved µg/L <0.05
Hg total µg/L
K dissolved mg/L 0.39
K total mg/L
Mg dissolved mg/L 1.71
Mg total mg/L
Mn dissolved µg/L 48.9
Mn total µg/L
Na dissolved mg/L 8.83
Na total mg/L
Ni dissolved µg/L 13.9
Ni total µg/L
Pb dissolved µg/L <0.5
Pb total µg/L
Sb dissolved µg/L <0.5
Sb total µg/L
Se dissolved µg/L <5
Se total µg/L
Sn dissolved* µg/L <1
Sn total* µg/L
W dissolved* µg/L <1
W total* µg/L
Zn dissolved µg/L 7
Zn total µg/L
TPH µg/L <40
TPH C06-C09 µg/L <10
TPH C10-C14 µg/L <10
TPH C15-C28 µg/L <10
TPH C29-C36 µg/L <10
* Not NATA endorsed analysis
WCCPL = William C. Cromer Pty. Ltd.
Blank space indicates an analyte was not requested
Venture Minerals Limited
Riley
Groundwater monitoring
Venture Minerals Ltd – Riley Hydrogeological Report
ATTACHMENT 6: TABLES OF GROUNDWATER ANALYSES 14 June 2012
William C Cromer Pty Ltd 74A Channel Highway Taroona Tasmania 7053
Environmental, engineering and groundwater geologists
Mobile 0408 122 127 email [email protected]
92
92
C C W
C C W
All Riley bores (initial sampling May 2012)
RYWB001 RYWB002 RYWB003 RYWB004 RYWB005
Easting (GDA94) 368532mE 367708mE 367706mE 368283mE 367380mE
Northing (GDA94) 5378761mN 5377096mN 5377096mN 5377671mN 5376828mN
Elevation (approx) 210mASL 220mASL 220mASL 270mASL 200mASL
Sampling date 3/5/12 3/5/12 3/5/12 15/5/12 15/5/12Time 0812 1022 1025 1300 1330
Lab report # 53832 53832 53995 53995Sampler WCCPL WCCPL WCCPL WCCPL
Sampling
Bore depth mbg 12.5 23.1 4.4 18.0 23.0
Standing water level (mbg) mbg 5.3 8.9 dry 15.6 17.5
Method Low flow Low flow Low flow Air lift
Volume extracted L 50 50 20 20
Field parameters
pH 5.2 5.5 6.5
EC µS/cm 118 185 400 70
Eh mV 103 80 -73
DO mg/L 1.4 7.7
Temperature 0C 11.8 12.5 11.4 9.3
Lab results
pH 5.5 6.1 6.8 7
EC µS/cm 134 185 417 78
TDS mg/L 90 107 290 63
TSS mg/L 338 87
Colour apparent CU >500 494
Colour true CU 22 <1 <1 <1
Turbidity NTU
Alkalinity H2O2 mgCaCO3/L
Alkalinity CO3 mgCaCO3/L <2 <2 <2 <2
Alkalinity HCO3 mgCaCO3/L 12 37 84 3
Total Alkalinity mgCaCO3/L 84 3
Acidity mgCaCO3/L 88 63 29 <3
Chloride mg/L 17.4 25.9 18.4 17.2
Sulphate mg/L 16.1 10.2 108 3.6
Ammonia mg-N/L 0.005 0.035 0.006 0.004
Nitrate mg-N/L 0.005 0.022 0.018 0.055
Nitrite mg-N/L <0.002 <0.002 0.002 <0.002
Total N mg-N/L 0.09 0.10 0.09 0.09
P dissolved mg-P/L 0.003 0.003 <0.5 <0.5
Total P mg-P/L 0.030 0.007 <0.005 <0.009
Ag dissolved µg/L <0.5 <0.5 <0.5 <0.5
Ag total µg/L <0.5 <0.5
Al dissolved µg/L 21 <5 <5 <5
Al total µg/L 5,560 891
As dissolved µg/L <1 <1 <1 <1
As total µg/L 2 <1
Ca dissolved mg/L 0.95 1.74 13.4 0.62
Ca total mg/L 1.14 1.96
Cd dissolved µg/L <0.1 <0.1 <0.1 <0.1
Cd total µg/L <0.1 <0.1
Co dissolved µg/L 23 19.8 1.0 5.4
Co total µg/L 29 82.5
Cr dissolved µg/L <1 160 60 <1
Cr total µg/L 11 239
Cu dissolved µg/L <1 <1 <1 <1
Cu total µg/L 6 1
Fe dissolved µg/L 209 51 <20 <20
Fe total µg/L 9,000 1,410
Hg dissolved µg/L <0.05 <0.05 <0.05 <0.05
Hg total µg/L <0.05 <0.05
K dissolved mg/L 1.05 0.21 0.54 0.39
K total mg/L 1.63 0.38
Mg dissolved mg/L 3.41 7.22 32.6 1.71
Mg total mg/L 5.40 7.78
Mn dissolved µg/L 243 56.2 <0.5 48.9
Mn total µg/L 333 365
Na dissolved mg/L 15.9 22.8 9.90 8.83
Na total mg/L 16.0 21.6
Ni dissolved µg/L 17.1 517 261 13.9
Ni total µg/L 27.7 649
Pb dissolved µg/L <0.5 <0.5 <0.5 <0.5
Pb total µg/L 4.2 1.1
Sb dissolved µg/L <0.5 <0.5 <0.5 <0.5
Sb total µg/L <0.5 <0.5
Se dissolved µg/L <5 <5 <5 <5
Se total µg/L <5 <5
Sn dissolved* µg/L <1 <1
Sn total* µg/L
W dissolved* µg/L <1 <1 <1 <1
W total* µg/L <1 <1
Zn dissolved µg/L 24 8 <1 7
Zn total µg/L 42 13
TPH µg/L <40 <40 <40 <40
TPH C06-C09 µg/L <10 <10 <10 <10
TPH C10-C14 µg/L <10 <10 <10 <10
TPH C15-C28 µg/L <10 <10 <10 <10
TPH C29-C36 µg/L <10 <10 <10 <10
* Not NATA endorsed analysis
WCCPL = William C. Cromer Pty. Ltd.
Blank space indicates an analyte was not requested