Table 1.

Groundwater chemistry.

Sample date	Sulfate (mM)	Sulfide (µM)	Iron(total) (µM)	Iron(II) (µM)	Sodium (mM)	Chloride (mM)	TDS (mg/L)
08/02/2016	3.54	<0.62	3.94	3.76	60.90	79.26	5.20
14/03/2016	3.38	<0.62	10.39	10.21	58.72	76.44	4.99
26/04/2016	3.12	0.94	2.87	2.69	57.85	72.21	4.76
30/05/2016	3.06	1.87	2.33	1.97	57.85	72.21	4.73
27/06/2016	2.95	1.25	4.12	1.07	56.11	71.36	4.72
01/08/2016	2.90	4.05	1.47	1.07	57.42	72.77	4.79
19/09/2016	2.88	4.37	1.68	1.97	56.11	69.95	4.64
31/10/2016	2.94	0.94	1.34	1.43	56.55	71.36	4.72

TDS total dissolved solids.