Table 8. Sulfate concentrations and 34S values in groundwater, samples grouped by area. Data from surface water taken at the same time at the same collection sites is included.
Month/Year of Collection	Sampling Location	SO4 mg/l	SO4 meq/l	SO4 34S
	Hillsboro Canal:
9/97	S-10C, head	67.28	1.40	22.21
9/97	S-10C, tail	58.43	1.22	21.47
9/97	S-10C, WA	42.79	0.89	9.63
9/97	S-10C, WB	7.79	0.16	21.71
9/97	S10C,WC	14.94	0.31	24.25
6/98	S10C, Head	25.85	0.54	18.11
6/98	S10C, Tail	24.76	0.52	18.08
6/98	S10C-WA	15.61	0.33	14.33
6/98	S10C-WB	4.30	0.09	20.27
6/98	S10C-WC	13.51	0.28	48.50
	WCA 2A:
6/97	F4, GW 4	2.47	0.05	21.95
6/97	F4, Surface	59.55	1.24	33.48
6/97	F4, GW 3	1.29	0.03	8.13
6/97	U3, Gw 3	0.99	0.02	6.38
6/97	U3, Surface	42.48	0.88	22.14
8/97	E1, GW4	2.45	0.05	21.35
8/97	E1, GW3	17.82	0.37	16.78
8/97	E1, Surface	81.09	1.69	23.60
9/97	WCA-2A, F1, SW	67.17	1.40	24.02
9/97	WCA-2A, F1, GW4	1.08	0.02	25.05
9/97	WCA-2A, F1, GW3	187.26	3.90	11.80
9/97	WCA-2A, U3, SW	66.59	1.39	23.68
9/97	WCA-2A, U3, GW4	0.67	0.01	31.46
9/97	WCA-2A, U3, GW3	3.36	0.07	0.94
9/97	WCA-2A, F4, SW	79.88	1.66	23.09
9/97	WCA-2A, F4, GW4	0.92	0.02	19.60
9/97	WCA-2A, F4, GW3	3.53	0.07	6.82
Month/Year of Collection	Sampling Location	SO4 mg/l	SO4 meq/l	SO4 34S
6/98	WCA2A, U3, GW3	2.00	0.04	0.09
6/98	WCA2A, U3, GW4	0.34	0.01	n.d.
6/98	WCA2A, U3, Surface Water	40.01	0.83	23.21
6/98	WCA2A, U1, GW3	0.16	0.00	n.d.
6/98	WCA2A, U1, GW4	3.03	0.06	43.96
6/98	WCA2A, U1, Surface Water	38.24	0.80	22.00
6/98	WCA2A, E4, GW3	3.61	0.08	45.85
6/98	WCA2A, E4, GW4	15.87	0.33	15.51
6/98	WCA2A, E4, Surface Water	40.55	0.84	22.75
6/98	WCA2A, F4, GW3	1.62	0.03	8.58
6/98	WCA2A, F4, GW4	0.34	0.01	n.d.
6/98	WCA2A, F4, Surface Water	36.18	0.75	21.66
6/98	WCA2A, F1, GW3	185.24	3.86	12.60
6/98	WCA2A, F1, GW4	0.00	0.00	n.d.
6/98	WCA2A, F1, Surface Water	32.94	0.69	19.34
6/98	WCA2A, E1, GW3	4.40	0.09	39.88
6/98	WCA2A, E1, GW4	0.25	0.01	n.d.
6/98	WCA2A, E1, Surface Water	53.93	1.12	22.05
	Nutrient Removal Area:
12/96	12-5-96, ENR, G'water, 11A	50.05	1.04	28.93
12/96	12-5-96, ENR, G'water, 11A	45.69	0.95	28.32
9/97	ENR 102	62.05	1.29	28.67
9/97	ENRG259	36.28	0.76	30.41
9/97	ENR 002	144.35	3.01	21.13
9/97	ENR 011	45.70	0.95	26.04
9/97	ENR 103 SW (1)	45.31	0.94	26.18
9/97	ENR 103 SW (2)	46.59	0.97	26.44
9/97	MP3-A	1535.51	31.99	24.68
9/97	MP3-B	79.11	1.65	19.65
9/97	MP3-C	39.59	0.82	23.78
9/97	MP3-D	61.64	1.28	27.79
9/97	MP1-A	40.28	0.84	27.77
9/97	MP1-B	54.41	1.13	27.22
Month/Year of Collection	Sampling Location	SO4 mg/l	SO4 meq/l	SO4 34S
9/97	MP1-C	35.89	0.75	26.06
9/97	MP1-D	26.67	0.56	22.19
9/97	MP2-A (1)	118.41	2.47	17.51
9/97	MP2-A (2)	70.53	1.47	24.46
9/97	MP2-B	164.23	3.42	17.36
9/97	M203P	38.38	0.80	14.21
9/97	M203PZ	114.10	2.38	30.94
9/97	M103P	174.09	3.63	19.41
9/97	M103PZ	51.16	1.07	27.94
6/98	ENR 004	30.14	0.63	18.80
6/98	ENR 011	56.84	1.18	24.60
6/98	ENR G259	49.55	1.03	24.95
6/98	ENR 012	30.69	0.64	18.77
6/98	ENR 002	24.72	0.51	16.69
6/98	MP1-A	34.88	0.73	32.78
6/98	MP1-B	16.97	0.35	38.53
6/98	MP1-C	6.99	0.15	25.25
6/98	MP1-D	9.77	0.20	36.22
6/98	MP2-A	92.93	1.94	19.35
6/98	MP2-B	175.53	3.66	24.69
6/98	MP2-C	61.75	1.29	31.53
6/98	MP2-D	n.d.	n.d.	n.d.
6/98	MP3-A	1611.30	33.57	25.11
6/98	MP3-B	56.45	1.18	24.27
6/98	MP3-C	66.47	1.38	36.13
6/98	MP3-D	41.13	0.86	28.58
6/98	MP3-TW	42.17	0.88	25.78
6/98	MP3-HW	55.91	1.16	20.46
6/98	MOP3-A	1857.70	38.70	15.52
6/98	MOP2-A	52.26	1.09	31.12
6/98	MOP2-B	16.91	0.35	40.69
6/98	MOP2-C	9.79	0.20	25.62
6/98	MOP1-A	69.00	1.44	18.23
6/98	MOP1-B	1.65	0.03	36.71
6/98	M103PZ	36.60	0.76	39.77
6/98	M103P	135.65	2.83	30.52
Month/Year of Collection	Sampling Location	SO4 mg/l	SO4 meq/l	SO4 34S
6/98	M103 Surface Water	32.27	0.67	18.83
6/98	M102P	221.45	4.61	23.89
6/98	M102 Surface Water	33.18	0.69	17.79
6/98	M203PZ	119.90	2.50	31.64
6/98	M203P	29.62	0.62	19.32
6/98	M203 Surface Water	29.18	0.61	20.85
6/98	M204P	59.09	1.23	25.19
6/98	M204 Surface Water	28.54	0.59	20.18
6/98	M303P	67.02	1.40	28.83
6/98	M303 Surface Water	30.79	0.64	21.71
6/98	M401P	32.10	0.67	32.53
6/98	M401 Surface Water	24.37	0.51	20.94

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