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Laboratory performs all anal <br />ses b EPA oz e <br />iv <br />le <br />t <br />th <br />d S <br />l • <br />y <br />y <br />i qu <br />a <br />n <br />me <br />s. <br />o amy <br />ea are <br />delivered the day of eollectioa to the lab in as iced cooler. A complete <br />description of t~ ground water monitoring program may be found oa pages 7-336 <br />to 7-355 of the Seneca II PAP, and is summarized on pages 7-341/342. <br />The Following discussion o£ the analytical data collected during the reporting <br />period ie arranged by strnta being monitored and coincides with the format (by <br />aquifer type) in which the analytical data are presented is Appendix C. The <br />diacueeioa of water quality will ba limited to a description of total dissolved <br />solids (TDS) concentrations. A separate section, Comparison of Ground Water <br />quality to water Uea Standards, will discuss any samples that exceed water use <br />standards. <br />Data for each well is thle appendix begins with a listing of the water quality <br />deter collected during this year, followed by water level meaeuremeata aa8 <br />remarks explaining the sampling procedure. Thin ie followed by a plot of TD9 <br />versus time for the entire period of record. The regression line oa this plot <br />is generated by a method known ere LONES3 (LOcally NEighted scattexylot • <br />Smoothing). A smoothness factor of 1.0 (on a scale of 0 to 1) was used, which <br />results is maximum ^emoothing~. Finally, this plot is followe8 by a table <br />listing historic TDS values and percent milliequivaleata For major ions. <br />- Alluvium. Nell 32 is located furthest upstream on Little Graeey Creek. <br />Review of the TDS plot indicates as increasing trend. Thies i& due to the <br />eoatributioa of waters from Spoil Syriags 3, 4, sad 5. Further downstream, Nell <br />6 also dieylaya as increasing TDS trend for similar reasons. Furthest <br />downstream oa Little Grassy Creek and below NPDES 002, ie Nell 33A. it oleo <br />displays ea increasing TDS trend. <br />Three walla are sampled is the Graeey Creak alluvium. Nell 71 monitors the <br />alluvium upstream of mlaing at Seneca II. It displays en increasing TDS tread. <br />Nell 33 monitors the Graeey Creek alluvium at the Little Graeey Creek <br />confluence. St displays as increasing TDS trend. Nell 70 monitors the alluvium <br />below Seneca II sad also downstream of the confluence with Scotebmans Gulch. it <br />interestingly displays a decreasing TDS trend. • <br />6 <br />