Laserfiche WebLink
ri <br />LA <br />Figure 2.7-28n). <br />The pH of the Third White Sandstone water in well GC -2 has changed from values <br />of eight to greater than ten and to between seven and eight for the most recent <br />values. The pH values of greater than ten do not seem natural for this aquifer and <br />possibly could be due to cement contamination from the well sealing. The most <br />recent pH values seem representative of this aquifer. <br />The field pH for the Third White Sandstone aquifer at well GP -9 has been <br />fairly steady for the last year and is shown in Figure 2.7-280. The pH at well P-8 <br />is similar to those observed at well GP -9. <br />Sulfate and bicarbonate are also the major anions for the Third White <br />' Sandstone aquifer, while calcium, sodium and magnesium are the major cations. The <br />three major cations are closer to equal concentration for this aquifer than the <br />aquifer stratigraphically below the Third White Sandstone. <br />Second White Sandstone <br />Well P-5 is the only Second White Sandstone well in the eastern portion of <br />Trapper that is routinely sampled. The TDS of the Second White Sandstone aquifer <br />has varied over a much larger range than observed for the remainder of the aquifers <br />in the eastern portion of Trapper. Figure 2.7-28p shows the TDS for well P-5. The <br />TDS of the Second White Sandstone is presently approximately 2000 mg/1, but has <br />varied from above to significantly below this level. <br />• The field pH of the Second White Sandstone water at well P-5 is close to <br />2-520 mm <br />W EVISED g •,� <br />