TABLE 3.

Results of acidic liquid media enrichments with different electron donors for paired core and groundwater samples

Sample type and depth BLS (m)a	Resultb with electron donor					Sample type and depth BLS (m)c	Resultb with electron donor
	FeSO4	(S4O6)2−	(S2O3)2−/(S4O6)2−	S0			FeSO4	(S4O6)2−	(S2O3)2−/(S4O6)2−	S0
Core (attached)						Groundwater (unattached)
11.0	−	−	−	−		12.7	−	+	+	+
17.7	−	−	−	−		18.6	−	+	+	+
23.2	−	−	−	−		24.6	−	+	+	+
29.9	−	−	−	−		30.6	−	+	+	ND
36.3	−	−	−	+		36.5	+	+	+	+
41.8	−	−	−	−		39.5	−	+	+	ND
47.2	−	−	−	−		48.4	−	+	+	+
53.6	+	−	−	−		54.4	+	+	+	+
59.7	−	−	−	−		57.3	+	+	+	+
66.1	+	−	−	−		63.3	+	+	+	+
72.2	+	−	−	−		72.0	+	+	+	+
78.9	+	−	−	+		78.0	−	+	+	+
84.1	+	−	−	−		84.1	−	+	+	+
90.5	+	−	−	−		90.1	−	+	+	ND
96.9	+	−	−	−		96.0	+	+	+	+
102.7	+	−	−	−		105.2	−	+	+	+

^aDepth below land surface (BLS) indicates the depth of the 0.3-m core segment (of a 1.5-m core) that was processed. 

^bPositive (+) and negative (−) enrichments are indicated. ND, no data. 

^cDepth below land surface (BLS) was measured from the midpoint of the 3-m packed-off interval that was sampled.