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<br /> <br />' 3.2 pH <br />' Field <br />H is a <br />ort <br />to <br />i <br />t <br />t b l <br /> p <br />n <br />mp <br />an <br />parame <br />er <br />measure ecause some coa <br /> spoils have the potential to increase acidity oi` the ground water <br /> which increases the mobility of most heavy metals. A pH of less than <br />' S would generally be needed to greatly increase the mobility of most <br /> heavy metals. <br /> <br /> Available pH data is tabulated in Table B-1 o.E Appendix B. Field <br />' H data for well GA1 is <br />resented on <br />a <br />e B-29 of A <br />endix B <br />Fie ld <br />H <br /> p <br />p <br />p <br />g <br />pp . p <br />' has varied from 6.4 to 7.9 since 1974 for water from this well. These <br /> variations are well within the natural range of fluctuation. Si milar <br />' variations have also been observed for well GA2. <br />' Water from well GB2 has generally been slightly below neutral <br />while the values from well GB5 have been above neui:ral. The pH values <br />' for well GBS have been higher than normal since June of 1984. The <br />' bailed sample, after air producing the well in September of 1986, was <br />significantly below the November of 1986 value. This indicates that <br />the well bore is influencing the pH water in the well. Cement <br />contamination is likely in this well. <br />The field pH of water from the GC wells does not show a trend and <br />are within expected limits, except for some high pH values in 1976 and <br />' 1977 from well GC2. <br />1 <br />3-7 <br />