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Water-Quality Assessment of the Sacramento River
Basin, California: Water-Quality, Sediment and Tissue
Chemistry, and Biological Data, 1995-1998
(Open-File Report 2000-391)

Cache Creek at Rumsey, California

Major Inorganic Constituents in filtered water (0.45 micrometer capsule filter)

Number of significant figures do not reflect analytical method reporting levels.

Method reporting levels of all analytes

[mg/L - milligrams per liter, µg/L - micrograms per liter, < - less than]

Date Time Calcium (mg/L) Magnesium (mg/L) Sodium (mg/L) Potassium (mg/L) Chloride (mg/L) Sulfate (mg/L) Fluoride (mg/L) Silica as SiO2 (mg/L) Iron (µg/L) Total solids (mg/L)
2/9/96 1150 21 18 13 1.8 11 12 0.1 11 3 168
3/7/96 1340 22 19 14 1.7 8.8 14 0.1 11 <3.0 175
4/25/96 1230 23 20 18 2.1 13 18 0.1 5.4 12 192
5/29/96 1100 24 22 22 2.3 16 17 0.1 5.6 14 208
6/26/96 1200 21 17 15 2 11 11 0.1 7.1 12 172
7/9/96 1230 20 16 13 2 9.5 8.9 0.1 8.9 10 168
8/28/96 1230 18 16 11 1.3 9.5 7 0.2 11 10 134
9/17/96 1230 17 16 12 1.1 10 6.8 0.1 11 6 145
10/22/96 1230 24 19 19 2.2 17 9.4 0.1 1.1 15 196
11/18/96 1500 31 41 120 5.3 160 36 0.2 3.7 4 572
12/13/96 1240 21 25 35 2 40 25 0.1 16 8 234
1/15/97 1100 24 18 14 1.9 10 12 0.2 3 7 181
2/19/97 1050 22 19 15 2 10 15 0.2 7.2 3 183
3/19/97 1120 22 26 26 1.6 22 29 0.1 12 <3.0 238
4/21/97 1030 20 18 16 1.3 14 14 <.10 8.9 <3.0 182
5/27/97 1350 18 16 13 1.5 11 9.8 0.1 5.9 <3.0 163
6/24/97 1100 19 15 10 1.5 7.6 7.4 0.11 5.6 5.4 148
7/22/97 1030 19 15 10 1.4 7.2 7.2 <.10 6 7.4 148
8/20/97 1130 20 16 13 1.9 11 7.6 0.11 3.9 19 162
9/16/97 1150 21 17 15 1.9 11 6.5 0.13 5.5 11 164
10/16/97 1030 20 16 15 1.3 17 6.5 <.10 11 <3.0 162
11/18/97 1300 31 39 103 4.7 140 45 0.13 11 <3.0 548
12/18/97 1030 28 35 59 2.8 70 42 0.11 14 < 10 388
1/20/98 1300 20 18 16 1.8 12 15 0.16 8.2 < 10 173
2/3/98 1230 14 12 9.6 1.4 4.4 14 <.10 11 < 10 131
3/26/98 1040 21 17 13 1.6 8 15 <.10 10 < 10 162
4/14/98 1100 20 18 13 1.6 9.9 17 <.10 9.2 < 10 173

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