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<br />the backfill water will initially be slightly alkaline with a pH <br />slightly less than 8. Well GF6 contains water with a pH near the <br />neutral. Backfill well GF7, completed in September 1987, has <br />shown pH values near neutral in 1990, Backfill well GF11 was <br />installed in July 1988 and pH of this backfill aquifer is slightly <br />below neutral. <br />Well GP1 has water with pH values above neutral, while well <br />GP2 water is generally near neutral. The pH values for wells GP3 <br />and GP4 have shown little change for water collected from the HI <br />and KLM aquifers, respectively. Well GP3 has had pH values near <br />neutral, while values for well GP4 have been slightly less than 9. <br />Wells GP5 and GP6 are completed in the QR aquifer. The pH <br />• values from well GP5 were at an average value of 8.6 while the pH <br />from well GP6 is near neutral. <br />HI aquifer well GP7 has typically had water with pH values <br />slightly above 7. Well GPB is completed in the KLM aquifer and <br />has water with a pH of near 8. Third White Sandstone aquifer well <br />GP9 pH values are typically near 7. <br />The alluvial (P1), Lewis Shale (P3), Second White (P5), and <br />Third White Sandstone (P8) aquifers in Pyeatt Gulch all contain <br />water with a pH that generally is slightly above 7. <br />The 1990 values for well J1 were near neutral. The 1990 pH <br />• value for the COY well was at neutral. The ph values for well 81- <br />• 03a have been near 8.5. The pH. values for .the GLUX-1 well are <br />above neutral. <br />3-11 <br />