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July, but recovered to its historic range in October. Wadge Underburden <br />Wells SWU6 and 11 continue to exhibit increasing water levels. Wadge <br />Underburden Well SWU8P1 continues with a long-term decrease in water <br />levels. <br />All alluvial wells are showing distinct seasonal water level <br />fluctuations in response to periods of precipitation recharge or the <br />lack of precipitation. Overburden and coal well water levels are <br />fluctuating in response to the precipitation recharge, induced ground <br />water flow to the reclaimed mine pits, and in some cases, changes in <br />reservoir water levels. Spoil well water levels still indicate that <br />only the furthest downslope highwall portions of the spoil exhibit <br />significant amounts of saturation. <br />Ground Water Quality. Ground water samples were collected from nineteen <br />wells on an annual or biannual basis. In addition, one well (SOV42) <br />that is required to be sampled did not have enough water to sample. The <br />parameter list used for all wells sampled this year is given on Table 4. <br />Analyses have been performed by ACZ Laboratory in Steamboat Springs, <br />Colorado since May 31, 1983. ACZ Laboratory performs all analyses by <br />EPA or equivalent methods. Samples are delivered the day of collection <br />to the lab in an iced cooler. A complete description of the ground <br />water monitoring program may be found on pages 7-336 to 7-355 of the <br />Seneca II PAP, and is summarized on pages 7-341/342. <br />The following discussion of the analytical data collected during the <br />reporting period is arranged by strata being monitored and coincides <br />with the format (by aquifer type) in which the analytical data are <br />presented in Appendix C. The discussion of water quality will be <br />limited to a description of total dissolved solids (TDS) concentrations. <br />A separate section, Comparison of Ground Water Quality to Water Use <br />Standards, will discuss any samples that exceed water use standards. <br />Data for each well in this appendix begins with a listing of the water <br />quality data collected during the past two years, followed by remarks <br />explaining the sampling procedure. This is followed by a plot of TDS <br />4 <br />