Scientific Investigations Report 2008–5071
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2008–5071
Table 7. Physical properties and concentrations of bacterial cells and selected dissolved constituents in ground-water and surface-water samples, Eastbank Aquifer System, Douglas County, Washington, August 20–22, 2007.
[Locations of wells, weir, and river site are shown in figure 25. Abbreviations: CaCO3, calcium carbonate; N, nitrogen; µS/cm, microsiemens per centimeter; –, not measured; <, less than]
| River | CT3 | CT4 | RW3 | SW11 | SW13 | SW14 | TH4 | LR2-E | North Weir | |
|---|---|---|---|---|---|---|---|---|---|---|
| Physical properties | ||||||||||
| Temperature (degrees Celsius) | 19.4 | 13.4 | 10.4 | 12.7 | 16.1 | 16.2 | 16.2 | 18.4 | 10.9 | 15.4 |
| Specific conductance (µS/cm) | 127 | 144 | 167 | 163 | 146 | 146 | 148 | 135 | 167 | 160 |
| pH (standard units) | 7.5 | 7.4 | 7.3 | 7.5 | 7.2 | 7.5 | 7.3 | – | 7.3 | 7.6 |
| Bacteria, per milliliter | ||||||||||
| Live bacterial cells | 88,000 | 1,300 | 470 | 450 | 800 | 390 | 360 | 1,500 | <3 | 290 |
| Dead bacterial cells | 54,000 | 7,700 | 1,000 | 1,700 | 380 | 610 | 330 | 730 | <3 | 330 |
| Dissolved constituents, in milligrams per liter | ||||||||||
| Dissolved oxygen | – | 5.5 | 3.9 | 6.0 | 3.8 | 4.5 | 5.3 | – | 3.7 | 8.0 |
| Alkalinity, as CaCO3 | 54 | 61 | 72 | 67 | 60 | 60 | 60 | 59 | 66 | 69 |
| Calcium | 17.6 | 19.3 | 21.9 | 22.1 | 18.9 | 19.0 | 18.7 | 18.9 | 20.2 | 21.7 |
| Magnesium | 4.10 | 4.47 | 4.75 | 4.64 | 4.32 | 4.36 | 4.36 | 4.30 | 4.72 | 4.44 |
| Sodium | 1.62 | 2.26 | 2.41 | 2.38 | 2.40 | 2.40 | 2.37 | 2.28 | 2.14 | 2.11 |
| Potassium | .61 | 1.04 | 1.63 | 1.61 | 1.02 | 1.02 | 1.02 | 1.20 | 1.03 | 1.48 |
| Bicarbonate | 65 | 74 | 88 | 82 | 73 | 72 | 73 | 72 | 81 | 84 |
| Nitrate plus nitrite, as N | .04 | .15 | .16 | .16 | .14 | .16 | .14 | .18 | .14 | .19 |
| Chloride | .706 | .775 | .900 | .843 | .749 | .753 | .739 | .947 | .915 | .769 |
| Sulfate | 8.43 | 8.30 | 8.97 | 8.38 | 8.00 | 8.27 | 8.29 | 8.31 | 7.96 | 8.57 |
| Fluoride | .058 | .066 | .079 | .097 | .075 | .076 | .076 | .068 | .075 | .080 |
| Silica | 4.14 | 7.54 | 10.60 | 9.09 | 8.71 | 8.14 | 8.17 | 7.34 | 10.90 | 7.49 |
U.S. Department of the Interior | U.S. Geological Survey
URL: http://pubs.usgs.gov/sir/2008/5071
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