Table 1. Summary of the geochemical data from the fracture-associated water collected from BH1 and BH2 boreholes.

Water field measurements	BH1	BH2
T (°C)	30	37.2
pH	7.7	7.9
Eh (mV)	−10	−53.7
TOC (mM)	NM	0.15
DOC (mM)	NM	0.14
TDS (ppm)	4269	3579
Conductivity (mS cm−1)	8.54	7.53
Chloride (mM)	5.6	67.5
Nitrate (µM)	<8.0	<7.2
Sulfide (mM)	NM	>10
Sulfate (mM)	<2.0	0.17
Iron (µM)	1.8	<0.23
Formaldehyde (mM)	0.01	NM

Eh: oxidation-reduction potential; TDS: total dissolved solids; TOC: total organic carbon; DOC: dissolved organic carbon. NM: not measured.