Environmental Assessment
Volume B-3.7
Mine
Hydrogeology
Ambatovy Project
83
January 2006
Table 3.7-1 Mine Site Groundwater Quality
Borehole ID.
DAN245H
DAM126H
Korean Pit
AMB046H
AMB129H / AMB113H
DAN106H
Sample Date
7/31/2004
3/26/2005
3/26/2005
4/19/2005
4/19/2005
3/27/2005
3/27/2005
4/20/2005
4/20/2005
3/26/2005
4/21/2005
4/21/2005
4/21/2005
4/28/2005
4/27/2005
Laboratory
Inspectorate
M&L
Dynatec
Inspectorate
M&L
JIRAMA
Inspectorate
M&L
Dynatec
Inspectorate
M&L
JIRAMA
Inspectorate
M&L
Inspectorate
M&L
JIRAMA
Inspectorate
M&L
JIRAMA
JIRAMA
Comments
Duplicate,
Cr(VI) sample
acidified
Duplicate,
Cr(VI) sample
acidified
Duplicate
Duplicate,
Cr(VI)
sample not
acidified
Duplicate,
Cr(VI)
samples
acidified
Duplicate,
Cr(VI)
samples
acidified
Duplicate
Duplicate,
Cr(VI) sample
not acidified
Duplicate
Duplicate,
Cr(VI) sample
not acidified
pH
7.8
7.8
6.4
5.3
6.6
6.34
6.39
EC
mS/m
15.8
13.6
6.02
3.36
11.0
7.05
12.97
TDS
mg/l
190
82
44
20
80
hardness
mg/l CaCO
3
57
56
23
8.4
43
Ca
mg/l Ca
0.4
1.2
3.6
2.4
0.9
1.2
0.4
10.8
3.6
Mg
mg/l Mg
13.5
12.8
18.23
4.2
1.5
2.19
10.2
7.78
21.14
Na
mg/l Na
2.2
0.6
2.3
0.8
0.7
2.3
1.3
2.3
2.3
K
mg/l K
<0.1
<0.1
0.1
0.5
0.2
alkalinity
mg/l CaCO
3
56
52
16
8
32
HCO
3
mg/l HCO
3
68
63
74.42
20
10
6.1
39
43.92
40.26
Cl
mg/l Cl
2.6
3.1
3.55
3.1
2.6
3.55
4.1
3.55
3.55
SO
4
mg/l SO
4
2.4
2.1
0.00
3.4
1.9
0.00
2.9
0.00
52.36
cations
meq/l
1.23
1.14
1.78
0.50
0.21
0.34
0.92
1.28
2.02
anions
meq/l
1.24
1.16
1.32
0.49
0.28
0.20
0.82
0.82
1.85
Ag
mg/l Ag
<0.004
<0.004
<0.004
<0.004
<0.004
As
mg/l As
0.06
<0.02
<0.02
<0.02
<0.02
Cr
mg/l Cr
0.13
0.32
0.286
0.10
0.19
0.098
0.29
<0.01
0.06
0.05
Cr (VI)
mg/l Cr
0.22
0.183
0.08
0.06
0.098
0.22
<0.01
0.06
0.014
0.065
Cu
mg/l Cu
<0.002
<0.002
0.002
<0.002
<0.002
Fe
mg/l Fe
0.08
0.12
0.17
0.06
0.74
10
0.3
Hg
mg/l Hg
<0.001
<0.001
<0.001
<0.001
<0.001
Mn
mg/l Mn
0.005
<0.001
0.02
0.10
0.22
0.00
0.76
Ni
mg/l Ni
0.05
0.07
0.12
0.32
<0.003
0.10
0.74
Se
mg/l Se
0.02
<0.03
<0.03
<0.03
<0.03
Si
mg/l Si
19.3
15.6
6.89
1.0
13.9
Zn
mg/l Zn
<0.005
0.18
0.16
0.02
0.15
NO
3
mg/l NO
3
0.7
0.00
0.3
4.4
0.48
2.8
0.04
0.03
NO
3
mg/l N
0.6
0.2
<0.1
1.0
0.6
NO
2
mg/l NO
2
<0.1
<0.1
<0.1
<0.1
<0.1
B
mg/l B
0.03
<0.006
<0.006
<0.006
<0.006
F
mg/l F
<0.1
<0.1
0.2
<0.1
<0.1
PO
4
mg/l P
0.6
<0.1
0.1
0.2
1.5
