annexc - Newmont Mining Corporation

Table C4-7
Groundwater Chemistry (2001-2007)
Akyem Project
Eastern Region, Ghana
Surface Water Statistic
Bicarbonate,
as CaCO3
mg/L
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
Barium,
Total
mg/L
Beryllium,
Dissolved
mg/L
Beryllium,
Total
mg/L
Total # Samples Analysed 89 89 102 90 199 113 86 105 86 110 90 104 86 100
Total Non Detect 3 88 0 70 95 77 82 93 52 76 10 22 86 100
Village Wells
Maximum 290 7.5 306 0.27 22 1.2 0.0012 0.009 0.05 0.12 0.7 0.68 0.005U 0.005U
Mean 124 NA 117 0.03 1 0.04 0.008 0.01 0.01 0.01 0.10 0.09 NA NA
Standard Deviation 71 NA 57 0.04 2 0.13 0.01 0.02 0.01 0.01 0.14 0.13 NA NA
Total # Samples Analysed 17 17 53 17 70 81 17 67 17 66 17 64 17 66
Total Non Detect 0 17 0 17 64 61 14 61 2 36 0 0 17 66
Monitoring Wells
Maximum 326 0.2U 264 0.1U 8.4 2.1 0.0013 0.037 0.06 0.06 0.16 0.21 0.0001U 0.005U
Mean 170 NA 133 NA 0.3 0.06 0.0003 0.01 0.01 0.01 0.08 0.07 NA NA
Standard Deviation 79 NA 69 NA 1.0 0.26 0.0004 0.01 0.02 0.01 0.04 0.05 NA NA
USEPA MCL PRIMARY 0.006 0.006 0.01 0.01 2 2 0.004 0.004
Water Quality USEPA MCL SECONDARY 0.05 to 0.2 0.05 to 0.2
Standards
WHO DWG 0.2 0.2 0.02 0.02 0.01 0.01 0.7 0.7
GSB/GWC DWG 0.2 0.2 0.005 0.005 0.01 0.01 0.7 0.7
U = value is detection limit
NA = not applicable
ND = no data
Shaded cell: value exceeds lowest std.
Note: mg/L = milligrams per liter.
USEPA = U.S. Environmental Protection Agency
WHO = World Health Org.
DWG = Drinking Water Goal
GSB/GWC = Ghana Stds Board and Water Co.