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because well GD-1 (2) has been pumped consistently in the last few years. Field pH from well GD-2 does not demonstrate a trend. The upgradient mining in the QR seams has not significantly affected the pH in this area of the aquifer. The pH values from backfill well GD- 3 are near neutral for 1996 which is near the values in the native aquifer at well GD-2. The QR aquifer at GE-1 has values above neutral with the 1996 pumped samples being slightly above 7. The pH of water from well GE-2 has varied from slightly less than 7 to approximately 9 with the latest value at 7.3. The pH values for well GE-3 showed variations from 7.7 to 8.1 in 1996. Twenty Mile Sandstone well GF-1 generally contains water with a pH near neutral, while the latest pH from U aquifer well {GF-2) was 7.6. The KLM aquifer well (GF-3) at this site contained water with a pH of approximately 8.5. A similar pH was observed for the HI aquifer at well GF-4 in 1996. All three backfill wells, GF-5, GF-7, and GF-11, have field pH values near neutral. The field pH in well GF-6 (QR) is also near neutral. Well GP-1 (QR) has water with pH values above neutral, while well GP-2 (KLM) water is generally near neutral. The field pH values for wells GP-3 and GP-4 have shown little change for water collected from the HI and KLM aquifers, respectively. Well GP3 has generally had pH values near neutral, while values for well GP-4 have been around 9. Wells GP-5 and GP-6 are completed in the QR aquifer. The field pH values from well GP-5 is generally above 8, while the pH from well GP-6 is generally above 7. The latest field pH value for HI aquifer well GP-7 was 8.1, while previous values are typically near 7. Additional sampling of well GP-7 is needed to determine whether a change has occurred. Well GP-8 (KLM) water had a field pH of 7.7 in 1996. The 3rd White Sandstone aquifer well GP-9 field pH values are typically near neutral. 3-9