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The pH values from backfill well GD -3 are 6.8 and 6.7 for 2013, which is near the values in the <br />native aquifer at well GD -2. <br />Similar pH values were observed for the HI aquifer at well GF-4 in 2013 to those observed in <br />previous years. Backfill well GF -5 had field pH values above 7.0 in 2013, while the field pH for <br />backfill well GF -7 was near neutral. The field pH values in backfill well GF -11 for 2013 were also <br />near neutral and similar to previous years. The field pH in well GF-6 (QR) was also above neutral in <br />2013. <br />Well GP -2 (KLM) water was slightly above neutral in 2013. The field pH values for well <br />GP -3 were higher than neutral from the HI aquifer and from well GP-4 above neutral for the KLM <br />aquifer. <br />Well GP -5 is completed in the QR aquifer and its field pH values are generally above 8. <br />The 2013 field pH values for Hl aquifer well GP -7 were near neutral, while well GP -8 <br />(KLM) water had field pH values near 8.0 in 2013. The 3rd White Sandstone aquifer well GP -9 <br />field pH values are typically near neutral. <br />The alluvial (P -1) and 3rd White Sandstone (P -8) wells in Pyeatt Gulch all contain water with <br />field pH that is generally near neutral. The field pH values for well GNP -1 were near neutral in <br />2013. The 2013 monitoring did not detect any indication of development of acidic water in the <br />Trapper Mine ground water. <br />3.4 NIA AND NO3 <br />Concentrations of ammonia and nitrate are presented in Appendix B, starting on page B -218. <br />In general, concentrations of ammonia vary significantly from year to year. Wells GD -2, GD -3, GF- <br />4, GF -5, GF -6, GF -7, GF -11, GP -2, GP -3, GP -5, GP -9 and P -8 all contained NHa concentrations that <br />Trapper Mining Company 3 -8 <br />2013 Annual Report <br />