Table 2.

Geochemistry of groundwater in the drill holes R-2247 and R-2250 in the Pyhäsalmi mine.

Drill hole		R-2247	R-2247	R-2250
Sampling date		13.8.2013	11.6.2014	14.8.2013
pH		8.6	8.7	8.8
EC	mS cm−1	103.3	102.0	34.0
Alk.	mM	0.09	0.08	0.09
TOC	mM	0.092		0.117
DOC	mM	0.066		0.085
Ca	mM	565	488	119
Fe	mM	0.0024	<0.0009	0.0006
K	mM	0.83	0.97	0.14
Mg	mM	0.14	0.13	0.04
Na	mM	324	320	112
P	mM	0.005	0.004	0.003
S	mM	1.23	1.30	1.16
Si	mM	0.14	0.10	0.18
Sr	mM	3.06	3.02	0.61
Br	mM	7.48	6.65	2.17
Cl	mM	1272	1097	285
SO4	mM	1.78	1.58	1.23
Sulfide	mM	0.0023	0.0020	0.057
TDS	g L−1	76.2	66.9	17.7
Gastot	mL L−1	56	119	60
Ar	mL L−1	0.58	1.06	0.40
O2	mL L−1	0.31	0.40	0.19
N2	mL L−1	39	73	26
H2	mL L−1	0.10	9.0	0.74
He	mL L−1	14	30	19
CH4	mL L−1	1.6	3.9	14
C2H6	mL L−1	0.24	0.46	0.08
C3H8	mL L−1	0.007	0.014	0.002
Iso-butane	mL L−1		0.0002
N-butane	mL L−1		0.0012
N-pentane	mL L−1		0.00012

EC, electrical conductivity; Alk, alkalinity; TOC, total organic carbon; DOC, dissolved organic carbon; TDS, total dissolved solids.