Table 1. Key physico-chemistry and major ion composition of control/diluent and mine and synthetic seepage waters.

Analyte	Water type
	Control/diluent	Seepage sample 1(15 June 2011)		Seepage sample 2(16 Sept. 2011)
		Mine	Synthetic	Mine	Synthetic
pH	5.8–6.4	7.6	7.7	8.0	8.0
ElectricalConductivity (µS/cm)	21–54	2320	2390	3090	3060
Dissolved organiccarbon (mg/L)	1.0–1.6	0.8	1.0	1.3	1.6
Calcium(Ca, mg/L)	<0.5–0.2	240	210	320	320
Potassium(K, mg/L)	<0.5–0.3	8.3	9.4	10	11
Magnesium(Mg, mg/L)	0.9	200	190	240	250
Sodium (Na, mg/L)	1.1	84	86	96	97
Chloride (Cl, mg/L)	1.6–2.0	21	25	24	22
Carbonate(HCO3, mg/L)	6.0–11	210	170	210	170
Sulfate (SO4, mg/L)	<0.5	1300	1200	1800	1900