Table 2.

Field geochemical measurements.

Site	Level	T (°C)	pH	ORP (mV)	cond (uS)	TDS (ppm)	DO mg/L	S2− ug/L	Fe2+ mg/L	NO−3 mg/L	NH3 mg/L	SiO2 mg/L	Mn mg/L	PO4 mg/L
St2_Oct	800	10	6.55	0	1008	715.7	1.20	7.0	2.50	1.40	0.08	0.00	0.30	bdl
St5_Oct	800	12.4	7.7	127	608.5	422.1	6.10	32.0	0.31	2.20	0.03	9.90	bdl	0.04
St6_Feb	4850	21.2	8.13	292	4757	3679	0.48	2778.0	0.04	4.77	0.37	23.00	bdl	0.11
St8_Oct	4850	30.9	8.06	138	1669	1168	1.40	305.0	bdl	3.10	0.47	22.90	0.60	0.08
St8_Feb	4850	32.8	8.46	264	1586	1105	2.10	382.0	0.01	1.57	0.48	6.00	0.20	0.10
St9_Feb	4700	26.9	8.28	79	1848	1313	5.90	0.0	0.00	0.57	0.01	6.70	0.20	0.07
ManD_Oct	4850	20.4	7.15	193	3206	2393	0.62	28.0	7.06	bdl	0.04	12.90	3.70	0.04
ManD_Feb	4850	17.6	7.73	235	2483	1835	0.09	130.0	2.25	0.64	0.01	11.50	bdl	0.02
ManB_Oct	4850	22.4	7.88	275	7975	6471	2.30	36.0	0.74	bdl	0.10	3.60	0.70	0.03
ManB_Feb	4850	23	7.96	276	7985	6459	0.23	83.0	3.02	1.47	0.09	10.20	bdl	0.00
Man3A_Feb	4850	19.9	7.66	200	7863	6403	2.8*	64.0	2.42	bdl	0.06	15.50	0.50	0.08

^*value represents a maximum, sample stored prior to analysis.