Site Identification	USGS Site Number	Dates	Times	Type of Sample	Specific Conductance (microsiemens/cm) 	Calcium (mg/L) 	Magnesium (mg/L)	Sodium (mg/L) 	Potassium (mg/L) 	Alkalinity by gran titration (mg/L as CaCO3)	Sulfate (mg/L)	Chloride (mg/L)	Fluoride (mg/L) 	Silica as SiO2 (mg/L)	Total Dissolved Solids (mg/L)	Iron (microgram/L)
"Sacramento Slough near Knights Landing, CA"	11391100	8/26/96	1100	Environmental	311	24	17	16	1.6	140	6.3	6.1	0.1	26	193	41
"Sacramento Slough near Knights Landing, CA"	11391100	8/26/96	1101	Replicate	314	24	17	17	1.6		6.5	6.1	0.1	27	270	15
"Cache Creek at Rumsey, CA"	11451800	12/13/96	1240	Environmental	436	21	25	35	2	110	25	40	0.1	16	234	8
"Cache Creek at Rumsey, CA"	11451800	12/13/96	1241	Replicate	436	21	25	35	2	110	25	40	0.11	16	247	20
"Arcade Creek near Del Paso Heights, CA"	11447360	1/13/97	1100	Environmental	186	18	4.6	11	2.5	50	13	12	<.10	13	125	61
"Arcade Creek near Del Paso Heights, CA"	11447360	1/13/97	1101	Replicate	193	18	4.6	11	2.6	50	13	12	<.10	13	128	81
"American River at Sacramento, CA"	11447000	3/24/97	1100	Environmental	55	5.2	1.8	2	0.74	19	2.1	1.3	<.10	9.9	41	8.8
"American River at Sacramento, CA"	11447000	3/24/97	1101	Replicate	55	5.3	1.8	2	0.8		2.2	1.4	<.10	10	42	14
"Yuba River at Marysville, CA"	11421500	11/17/97	1400	Environmental	90	9.5	3.1	2.4	0.56	30	4	1.6	<.10	12	65	13
"Yuba River at Marysville, CA"	11421500	11/17/97	1401	Replicate	90	9.5	3.1	2.4	0.54	30	3.9	1.6	<.10	12	65	11
"Colusa Basin Drain at Road 99E near Knights Landing, CA"	11390890	2/26/98	1100	Environmental	244	17	9.1	18	2.1	91	19	6.5	0.17	10	140	11
"Colusa Basin Drain at Road 99E near Knights Landing, CA"	11390890	2/26/98	1101	Replicate	243	17	9.2	17	2.1	91	19	6.6	0.18	10	145	14