Laserfiche WebLink
• undisturbed site on the east side of the PA. Conductivity data for well GP3 which is a flowing well <br />is presented on Figure B-24. The conductivities from well GP3 prior to 1990 showed some scatter <br />but recently have been fairly steady at approximately 1300 ~mthos/cm. <br />The data for well GP4 present a fairly steady plot with data averaging approximately <br />]300 Farthos/cm (see Figure B-25). Wells GPS and GP6 are the westernmost wells of the GP well <br />series, and are approximately rivo miles from active mining in the QR coal seams. Field <br />conductivities measured the 3rd quarter in 1993 and 1994 for wells GPS and GP6 do not agree with <br />corresponding values of TDS, whereas laboratory conductivity values are in agreement with TDS. <br />Considering the 3rd quarter 1993 and 1994 laboratory values the conductivity plots for each well <br />are fairly stable with average values of 1600 ~anhos/cm for well GPS and 1100 ,cmthos/cm for well <br />GP6. This illustrates that the downgradient well, GPS, is subject to higher concentrations of <br />• dissolved solids from material in the QR aquifer between the two sites. Although these wells are <br />relatively close to active mining in the HI seams, changes seen in these wells are most likely natural <br />fluctuations. <br />Conductivity plots for wells GP7 and GP8 present significant scatter through 1986 (see <br />Figures B-28 and B-29). Some of this variation in the early data is probably due to the differences <br />in bailed water samples taken in 1986 and pumped samples from the annual monitoring after 1986. <br />The last two field measurements for well GP7 and GP8 do not correlate well with previous <br />correlations between laboratory conductivity and TDS. As with GPS and GP6, there is agreement <br />between the laboratory conductivity and TDS. Considering the laboratory values along with past <br />field measurements, conductivity for well GP7 and GP8 have remained fairly steady since 1987. <br />These two wells aze located near the eastern boundary of the PA and represent the undisturbed <br />characteristics ofthe HI and KLM aquifers. <br />3-5 <br />