TABLE 1.

Representative interval groundwater compositions from well C-1024

Depth (m)	Concn (mg liter−1) ofa:																							Condc (mS cm−1)	pH	Eh (dV)	Temp (°C)
	SiO2	Al	Mn	Total Fe	Fe2+ (%)	Mg	Ca	Na	K	Cr	Ni	Pb	As	Cu	Zn	Cd	SO4	Total S	Cl	F	NO3	PO4	O2b
18.6	97.0	152.9	57.7	216.8	208 (96)	354.0	512.5	68.2	2.3	0.10	0.81	0.03	<0.010	106.2	81.8	0.22	4,202.1	1,429.1	56.4	37.7	<6.0	<7.0	2.8	5.00	3.68	4.7	36.5
24.6	99.8	155.1	58.0	218.5	208 (95)	348.4	515.8	68.9	2.7	0.08	0.79	0.06	<0.010	105.7	80.4	0.21	4,200.0	1,453.2	56.2	37.5	<6.0	<7.0	0.0	5.13	3.65	3.3	28.3
36.5	73.1	225.8	79.1	379.0	380 (100)	486.0	483.5	66.1	8.7	0.07	0.92	0.18	<0.010	58.4	76.3	0.24	5,226.9	1,785.7	61.6	81.2	<6.0	<7.0	0.2	6.20	3.34	4.6	26.8
54.4	100.3	148.4	55.2	202.9	195 (96)	332.4	511.2	67.5	4.6	0.09	0.72	0.13	<0.010	86.1	54.7	0.20	4,087.0	1,356.2	69.6	40.2	<6.0	<7.0	0.2	5.10	2.86	5.6	24.1
63.3	96.7	144.8	55.4	189.8	182 (96)	342.8	535.7	69.2	5.2	0.09	0.69	0.09	<0.010	106.6	61.6	0.22	4,076.3	1,424.8	63.5	38.4	<6.0	<7.0	0.4	5.18	3.16	6.1	25.9
84.1	88.7	128.6	53.3	190.6	191 (100)	338.8	523.7	68.7	6.7	0.07	0.74	0.05	<0.010	104.0	53.3	0.19	4,006.1	1,334.6	59.8	37.0	<6.0	<7.0	1.0	5.15	3.92	4.0	27.6
90.1	89.3	137.2	52.7	177.3	177 (100)	330.6	539.8	69.0	6.8	0.07	0.64	0.05	<0.010	93.0	52.7	0.20	3,962.0	1,322.4	54.9	36.6	<6.0	<7.0	1.0	5.18	3.64	4.4	26.3
96.0	94.1	149.4	53.8	162.3	162 (100)	347.1	525.3	70.0	5.8	0.06	0.69	0.04	<0.010	96.1	53.8	0.18	3,990.5	1,360.0	59.9	36.9	<6.0	<7.0	2.2	5.29	3.62	5.6	25.4
105.2	91.1	126.1	54.1	183.1	179 (98)	322.5	532.6	73.3	7.3	0.06	0.59	0.05	0.01	78.0	43.7	0.19	3,970.8	ND	69.9	27.3	<12	<14	4.6	4.70	3.90	4.6	23.5

^aAt all depths, values for Ti were <0.005 mg liter⁻¹, values for Se were <0.010 mg liter⁻¹, and values for Hg and Ag were <0.05 mg liter⁻¹. ND, no data. 

^bDissolved O₂ readings below 0.5 mg liter⁻¹ are considered to be below detection, but absolute instrument readings are reported. 

^cCond, conductivity.