B18183.2-AC Browns Oxide Proj - Groundwater Modelling...Coffey Geosciences Pty Ltd Geotechnical ACN...

Coffey Geosciences Pty Ltd ACN 056 335 516 Geotechnical l Resources l Environmental l Technical l Project Management

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10 April 2006

As shown

COMPASS RESOURCES NL BROWNS OXIDE PROJECT GROUNDWATER MODEL

GROUNDWATER MODEL DEFINITION

FIGURE 1

Job no: B18183/2-AC

Whites Void

Intermidiate Void

Proposed Mine Site

N

4000 m

Bore location

LEGEND:

Scale

NO FLOW BOUNDARY

NO FLOW BOUNDARY

CONSTANT HEAD BOUNDARY


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10 April 2006

As shown


SURFACE CONTOURS

FIGURE 2

Job no: B18183/2-AC

N

4000 m

62

LEGEND:

Surface Level (mAHD)

Scale


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10 April 2006


STEADY STATE GROUNDWATER LEVELS - CALIBRATION

FIGURE 3

Job no: B18183/2-AC

N Whites Void

Intermediate Void

Proposed Mine Site

4000 m

62

LEGEND:

Groundwater Level (mAHD)

Scale


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10 April 2006


CALIBRATION COMPARISON

FIGURE 4

Job no: B18183/2-AC

56

57

58

59

60

61

62

63

56 57 58 59 60 61 62 63

Observed Head [m]

Co

mp

ute

d H

ead

[m

]

Feb-06 Mar-06 Apr 2006 May-06

Jun-06 Jul-06 Aug-06 Sep-06

Oct-06 Nov-06 Dec-06


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10 April 2006


TEST PIT PUMPING, COMPUTED DRAWDOWN IN SEPTEMBER 2002, INITIAL TRIAL

FIGURE 5

Job no: B18183/2-AC

Limit of Whites Formation

N

500 m

0.75

Bore location

LEGEND:

Drawdown [m]

TPB 1

TPB 3

TPB 2

3137

Test Pit

3515


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10 April 2006


TEST PIT PUMPING, DRAWDOWN IN SEPTEMBER 2002 (‘Impregnated Dolomite’: T= 40 m2/day)

FIGURE 6

Job no: B18183/2-AC

N

500 m

0.75

Bore location

LEGEND:

Drawdown [m]

TPB 1

TPB 3 TPB 2

3137

‘Impregnated Dolomite’ Kf = 40 m2/day

S = 0.01

Test Pit

3515


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12 April 2006

As shown

COMPASS RESOURCES NL BROWNS OXIDE PROJECT GROUNDWATER MODEL POSSIBLE PIT LAYOUT

FIGURE 7

Job no: B18183/2-AC

N

LEGEND:

Ground surface (mAHD)

RL45 Pit floor level (mAHD)


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MODELLED AVERAGE GROUNDWATER LEVELS (MINE OPERATES AT FULL DEPTH FROM THE OUTSET)

FIGURE 8

Job no: B18183/2-AC

N

500 m

34

Groundwater Flow

LEGEND:

Groundwater Level [mAHD]

East Finniss River

Browns Oxide Mine Intermediate Mine Void


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12 April 2006

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MODELLED FLOW RATES (MINE OPERATES AT FULL DEPTH FROM THE OUTSET)

FIGURE 9

Job no: B18183/2-AC

N

500 m

63 L/s

LEGEND:

Flow Rate ( -ve indicates flow reduction)

East Finniss River

Browns Oxide Mine

Intermediate Mine Void

1 L/s

3 L/s

0 L/s

12 L/s

163 L/s

63 L/s

20 L/s32 L/s Intermediate Pond:

-103 L/s

East Finness River: - 218 L/s

Proposed Browns Oxide Mine:294 L/s

1 L/s

3 L/s

0 L/s

12 L/s

163 L/s

63 L/s

20 L/s32 L/s Intermediate Pond:

-103 L/s

East Finness River: - 218 L/s

Proposed Browns Oxide Mine:294 L/s

2 4

2

6

8

10

2 4

2

6

8

10


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MODELLED AVERAGE DRAWDOWN (MINE OPERATES AT FULL DEPTH FROM THE OUTSET)

FIGURE 10

Job no: B18183/2-AC

N

2000 m

4

LEGEND:

Drawdown [m]

East Finniss River

Browns Oxide Mine Intermediate Mine Void

B18183/2-AC

13 April 2006

1

APPENDIX A

Mineralisation Study Results Provided By Compass Resources

98BD31

02BD04

DD171 97BD11

97BD8

98BD48

58B48

01BD02

BAU1

BG1

DD87

DD150

DD151

DD154

DD156

DD157

DD160

DD163

DD165DD170

DD172

DD180

DD182

DD195

DD196

DD197

DD208

DD336DD356

DD728

DD731

56B1

56B2

56B3

56B4

56B556B6

56B7

56B8

56B9

56B10

56B11

56B12

56B13

4 56B15A

6B16

56B17

56B19

56B20

56B21

56B22

57B2357B24

57B25

57B26

57B27

57B28

57B29

57B30

57B31

57B32

57B33

57B34

57B35

57B36

57B37

57B38

57B39

57B41

57B42

57B43

57B44

57B45

57B46

57B47

60B49

61B50

65B51

65B52

65B5365B53

71B58

71B60

78BD65

90BD1

90BD2

90BD3

90BD4

90BD5

94BD194BD2

94BD3

94BD4

94BD5

94BD6

94BD7

94BD8

94BD9

94BD10

94BD11

94BD1294BD13

94BD1494BD15

94BD16

94BD1794BD19

94BD20

95BD1

95BD2

95BD3

95BD4 95BD595BD6

95BD7

95BD8

95BD9

95BD1095BD11

95BD12

95BD1395BD14

95BD1595BD16

95BD17

95BD1895BD19

96BD1

96BD2

96BD3

96BD4

96BD5 96BD6 96BD7 96BD8 96BD9 96BD1096BD1196BD12

96BD13

96BD14

96BD15

96BD16

96BD17

96BD18

96BD19

96BD20

96BD21

96BD2296BD2396BD24

96BD25

96BD26

96BD27

96BD28

96BD29

96BD30

96BD3196BD32

96BD33

96BD34

96BD35

96BD3696BD37

96BD38

96BD39

96BD40

96BD41

96BD42

96BD4396BD44

96BD45

96BD4696BD48

96BD49

96BD50

96BD5196BD52

96BD5396BD54

96BD5596BD56

96BD57

96BD58

96BD5996BD60

96BD61

96BD62

96BD63

96BD64

96BD6596BD66

96BD67

96BD6896BD6996BD70

96BD71

96BD7296BD7396BD7496BD7596BD7696BD7796BD7896BD79

96BD80

96BD81

96BD82

96BD83

96BD84

96BD8596BD86

96BD87

96BD88

96BD89

96BD90

96BD91

96BD92

96BD9396BD94

96BD9596BD96

96BD9796BD9896BD99

96BD10096BD101

96BD102

96BD103

96BD104

96BD10596BD106

96BD10796BD108

96BD109

96BD110

96BD111

96BD112

96BD113

96BD114

96BD115

96BD116

96BD117

97BD1

97BD2

97BD3

97BD4

97BD5

97BD6

97BD797BD9

97BD10

97BD12 97BD1397BD14

97BD15

97BD16

97BD1797BD18

97BD19

97BD20

97BD21

97BD22

97BD2397BD24

98BD1

98BD2

98BD3

98BD4

98BD5

98BD6

98BD7

98BD8

98BD9

98BD10

98BD11

98BD12

98BD13

98BD14

98BD15

98BD16

98BD17

98BD18

98BD19

98BD20

98BD21

98BD2298BD23

98BD24

98BD25

98BD26

98BD27

98BD28 98BD29

98BD30

98BD34

98BD3598BD38

98BD39

98BD4198BD42

98BD43

98BD45

98BD46

98BD47 98BD49

98BD50

98BD51

98BD52

98BD53

98BD54

98BD55

98BD56

98BD5798BD58

98BD59

98BD60

98BD61

98BD62

98BD63

98BD6498BD65

98BD66

98BD6798BD68

98BD69

98BD70

98BD71

98BD72

98BD73

98BD74

CDH1

CDH2

CDH3

CDH4

CDH5

CDH7

CDH8

CDH9

00BD1

00BD2

00BD3

00BD4

00BD5

00BD6

00BD700BD8

00BD10

00BD11

00BD12

00BD1800BD1900BD2000BD21

00BD30

00BD32

01BD01 01BD03

02BD01

02BD02 02BD0302BD05

02BD06

02BD07

02BD08

02BD09

03BD01

04BD01

04BD02

04BD02

04BD04

04BD0504BD06

04BD07

04BD08TPB1

TPB2

TPB3

05BD0105BD0205BD0305BD04

05BD05

05BD06

05BD07

05BD08

05BD09

05BD10

05BD11

05BD12

05BD13

05BD14

05BD1505BD1605BD17

05BD18

05BD19

05BD20 05BD21

05BD22

05BD23

05BD24

05BD25

05BD26

05BD27

05BD28

05BD2905BD3005BD31

05BD32

05BD3305BD34

05BD35

05BD36

05BD37

05BD38

05BD3905BD40

05BD41

05BD42

05BD43

05BD4405BD45

05BD46

05BD47

05BD48

05BD49

05BD50

05BD5105BD52

05BD53

05BD54 05BD55

05BD56

05BD5705BD58

05BD59

05BD60

05BD61

05BD62

B18183/2-AC

13 April 2006

2

APPENDIX B

Water Quality Test Results

Pre-remediationSite TPB 1 TPB 2 TPB 3 RN22107 RN22108 RN22108 RN22107 RN22108

Sampling depth 10 m 10 m 10 m 15 m 25 m 50 m Date 16/03/2010 16/03/2010 16/03/2010 16/03/2010 16/03/2010 16/03/2010 18/8/83 30/11/83 22/8/83 30/11/83

Weathered carbonate aquifer

Weathered Whites formation/carbona

te contact Fault zoneParameter UnitEC µS/cm 408 2,970 107 2,110 4,480 4,710 4,940 5,330 3,660 3,640pH units 6.8 9.3 7.1 6.0 6.5 6.5 7 6 6 6Alkalinity mg/L 45 17 42 55 229 251 71 30NO3_N mg/L 0.735 <0.005 <0.005 1.93 <0.005 <0.005Cl mg/L 2.2 56 1.7 19.5 75 79.7 110 105 50 55SO4_F mg/L 149 1880 10.1 1300 2990 3180 3,685 3,770 2,615 2,330Ca_F mg/L 20.9 157 4.4 163 347 362 390 391 285 260Mg_F mg/L 34.5 384 9.1 232 649 720 684 724 488 486Na_F mg/L 4.3 34.1 1.5 22.1 58.1 61.7 46 100 35 32K_F mg/L 1.2 8.3 1.6 3.6 6.9 7 3 5 7 6

Ag_F µg/L 0.1 <0.5 <0.05 <0.5 <0.5 <0.5Al_F µg/L 0.5 <1 2.2 108 3.6 3.2As_F µg/L 2.35 3.55 8.2 2.65 171 412Cd_F µg/L 0.16 <0.2 <0.02 4.18 0.48 0.38Co_F µg/L 5.93 0.82 1.48 4,720 1,780 1,700 3,500 3,900 5,200 46,000Cr_F µg/L 0.1 <2 <0.1 <2 <2 <2Cu_F µg/L 48.4 0.38 0.07 3,040 15.6 14.3 2,800 7,600 10,000 8,500Fe_F µg/L <20 <200 3,320 1,560 4,060 9,440Hg_F µg/L <0.02 <0.2 <0.02 <0.2 <0.2 <0.2Mn_F µg/L 15.3 757 248 49,000 13,200 14,500 108,000 113,000 24,000 20,000Ni_F µg/L 51.3 0.71 1.48 3,450 846 794 3,400 4,400 4,600 47,000Pb_F µg/L 0.29 0.14 0.31 28.9 4.05 4.5U_F µg/L 0.07 0.02 0.08 17 65.6 101Zn_F µg/L 31.8 6.2 1.9 2,220 181 152 3,100 2,400 2,240 2,300

B18183/2-AC

13 April 2006

APPENDIX C

Information provided by Mr Peter Jolly, Government consultant to the EPA

B18183.2-AC Browns Oxide Proj - Groundwater Modelling...Coffey Geosciences Pty Ltd Geotechnical ACN...

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