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TABLE 2-4 (Continued) <br />• <br /> 3-30-90 6-26-90 9-27-90 <br />Na26-89-3 <br />(Perched) <br />Conductivity (umhos) 700 840 700 <br />pH 9.1 8.6 7.3 <br />0 <br />Temp. C 9.7 17.0 18.1 <br />TDS (mg/1) 436 472 590 <br />SAR 15.9 8.3 5.8 <br />Sodium (mg/1) 189 150 129 <br />Fluoride (mg/1) 1.4 0.5 0.5 <br />Boron (mg/1) 0.1 0.3 0.1 <br />Magnesium (mg/1) 3.0 8.0 13.0 <br />Potassium (mg/1) 2.0 2.0 2.0 <br />• <br /> <br />37 <br />