Laserfiche WebLink
coal spoils have thejpotential to increase aci+kity of the ground • <br />water which <br />less tkian 5 would <br />mobility of most <br />the mobility of most heavy metals. A pH of <br />y be needed to greatly increase the <br />metals. <br />Available pH data is tabulated in Table f+-1 (page B-40) of <br />Appendix B. Field pH has varied from 6.7 to 7.Q in 1991 for water <br />from well GA1. Theseivariations are well within the natural range <br />of fluctuation. A similar range of variation ha:. been observed for <br />well GA2 in 1991 <br />Water from well GB2 has generally been near or slightly below <br />7. Values for 1991 are very similar. The pH values from well GB5 <br />have been above 7. The pH values for well GB:~ have been higher <br />than normal since Jtine of 1984. The bailed sample, after air • <br />producing the well for the third quarter for tkie last four years <br />has been significantly below the remainder of i;he samples. This <br />indicates that the well bore is influencing they pH of the ground <br />water in this well. 'Some cement contamination .is likely. <br />The field pH of water from the GC wells does not show a trend <br />and are within expected limits, except for some high pH values in <br />1976 and 1977 from well GC2. <br />Well GD1 had a significant increase in pH .tn 1984. Field pH <br />values are presently back to levels that are expected and that were <br />present for the first several years from this well. The recent <br />field pH values are thought to be more repr+:sentative of the <br />aquifer water because well GD1 has been pumped a~nsistently in the <br />last five years. Field pH from well GD2 does not demonstrate a • <br />3-8 <br />