Table 29. Tailings properties compared to Relevant Guidelines
Unit
Processed/New
NEPM HILs Commercial/Industrial
Analyte
Tailings Value
Setting (mg/kg)
pH
-
9.57
NA
Electrical conductivity
µS/cm
4000
NA
TDS
mg/L
30
NA
Magnesium as Mg
mg/L
100
NA
Sodium as NA
mg/L
70
NA
Sulfate
mg/L
2000
NA
Chlorine as Cl
mg/L
20
NA
Hardness as CaC0 3
mg/L
514
NA
Iron as Fe
mg/L
59
NA
Manganese as Mn
mg/L
10
40000
Zinc as Zn
ppm
50
400000
Calcium
%
2.4
NA
Magnesium as Mg
%
0.23
NA
Sodium as NA
%
0.17
NA
Aluminium as Al
%
1.5
NA
Arsenic as As
ppm
102
3000
Barium as Ba
ppm
60
NA
Bismuth as Bi
ppm
23
NA
Cobalt as Co
ppm
62
4000
Copper as Cu
ppm
216
250000
Molybdenum as Mo
ppm
50
NA
Nickel as Ni
mg/L
7.83
4000
Selenium as Se
mg/L
26.09
10000
Silver as Ag
ppm
0.4
NA
105
Wulguru Technical Services Pty Ltd – Supporting Information to Amend an Environmental Authority
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