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Well GP1 (QR) has water with pH values above neutral, while well GP2 (KLM) water <br />is generally near neutral. The field pH values for wells GP3 and GP4 have shown little change for <br />water collected from the HI and KLM aquifers, respectively. Well GP3 has generally had pH values <br />near neutral, while values for well GP4 have been azound 9. <br />Wells GPS and GP6 aze completed in the QR aquifer. The field pH values from well GPS <br />are generally near a value of 8.6, while the pH from well GP6 is generally above 7. <br />HI aquifer well GP7 has typically had water with field pH values near 7. Well GP8 <br />(KLM) has recently had water with a pH slightly above neutral. The 3rd White Sandstone aquifer <br />well GP9 field pH values are typically near neutral. <br />The alluvial (Pl), Lewis Shale (P3), 2nd White (PS), and 3rd White Sandstone (P8) wells <br />in Pyeatt Gulch all contain water with field pH that is generally near neutral. <br />The 1992-1993 values for alluvial wells J1 and COY were near neutral. The field pH <br />values for well 81-03a had been typically near 8.5 with a rise in pH to 9.6 for the 3rd quarter of <br />1994. The pH values for the GLUX-1 well are between 7.0 and 8.0. <br />3.4 SAR <br />The sodium-adsorption ratio (SAR) is tabulated on the second series of pages in Table <br />B-1. The SAR values measured for water from well GA1 and GA2 are low with an average value <br />of a few tenths. Well GA2 went dry neaz the 2nd quarter of 1994, therefore only List C data is <br />available for this year. SAR values for water from well GB2 aze typically slightly less than one. <br />The SAR from well GBS w typically less than ] 0 prior to 1985. The SAR seemed to reach its <br />peak value in 1989 at 32 with a declining trend observed since then (17.5 in 1994). <br />3-9 <br />