annexc - Newmont Mining Corporation

Surface Water Statistic
Afosu Stream
Mamang
Tributaries
Mamang River
Pra River
Tributaries
Pra River
Water Quality
Standards
U = value is detection limit
NA = not applicable
ND = no data
Shaded cell: value exceeds lowest std.
Bicarbonate,
as CaCO3
mg/L
Table C4-5
Surface Water Chemistry (2001-2007)
Akyem Project
Eastern Region, Ghana
Carbonate,
as CaCO3
mg/L
Alkalinity,
Total,
as CaCO3
mg/L
Aluminum,
Dissolved
mg/L
Aluminum,
Total
mg/L
Ammonia,
Undistilled
mg/L
Antimony,
Dissolved
mg/L
Antimony,
Total
mg/L
Arsenic,
Dissolved
mg/L
Arsenic,
Total
mg/L
Barium,
Dissolved
mg/L
Total # Samples Analysed 23 23 48 16 61 26 17 25 19 41 18
Total Non Detect 0 19 0 7 6 23 17 25 11 13 0
Maximum 171 2.5 289 1.1 27.5 0.18 0.01U 0.01U 0.006 0.036 0.0394
Mean 108 1 99 0.2 2 0.02 NA NA 0.004 0.01 0.02
Standard Deviation 28 1 45 0.3 4 0.04 NA NA 0.002 0.01 0.01
Total # Samples Analysed 47 47 117 24 148 47 29 51 29 86 29
Total Non Detect 0 38 0 9 9 33 22 42 16 25 0
Maximum 192 2.5 259 2.2 24 0.25 a
0.01U 0.01U 0.01 0.0144 0.09
Mean 113 1 93 0.4 2 1 0.006 0.003 0.005 0.004 0.05
Standard Deviation 42 1 46 1 4 7 0.005 0.005 0.002 0.004 0.02
Total # Samples Analyzed 42 42 41 16 53 46 21 46 22 50 22
Total Non Detect 0 42 0 5 3 31 20 42 13 20 0
Maximum 223 2.5U 181 3.5 8 0.93 a
0.01U 0.01U 0.005 0.4 0.30
Mean 74 NA 71 1 2 1.4 0.01 0.004 0.003 0.01 0.05
Standard Deviation 35 NA 39 1 2 9 0.01 0.005 0.002 0.06 0.05
Total # Samples Analyzed 12 12 23 5 28 14 7 14 8 19 7
Total Non Detect 0 10 0 0 2 10 5 12 5 7 0
Maximum 189 2.5 152 1.4 18.1 0.59 a
0.01U 0.01U 0.005 0.02 0.08
Mean 100 1 89 0.4 2 1 0.01 0.004 0.005 0.01 0.04
Standard Deviation 45 1 31 1 3 2 0.01 0.005 0.001 0.004 0.02
Total # Samples Analyzed 33 33 44 16 54 38 20 39 23 42 20
Total Non Detect 0 29 0 7 3 29 20 37 13 19 0
Maximum 104 2.5 182 2.3 15.9 0.06 0.01U 0.01 0.005 0.01 0.04
Mean 68 1 72 1 2 0.01 NA 0.004 0.003 0.005 0.03
Standard Deviation 14 1 30 1 3 0.01 NA 0.005 0.002 0.004 0.005
USEPA MCL PRIMARY 0.006 0.006 0.01 0.01 2
USEPA MCL SECONDARY 0.05 to 0.2 0.05 to 0.2
WHO DWG 0.2 0.2 0.02 0.02 0.01 0.01 0.7
GSB/GWC DWG 0.2 0.2 0.005 0.005 0.01 0.01 0.7
Note: mg/L = milligrams per liter.
a = anomalous values from March 2004 were discarded; value shown is second highest maximum in data set.
USEPA = U.S. Environmental Protection Agency
WHO = World Health Org.
DWG = Drinking Water Goal
GSB/GWC = Ghana Stds Board and Water Co.