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25 and 27, normally exhibits rater levels higher thsa either 25 or 27. This ie not a <br />• normal ground rater level gradient; therefore, its water levels should be reviered rith <br />caution. Perhaps, as rich Well 22, rater is being trapped in the borehole. <br />Sawn spoil wells were completed in the fall of 1937. Three (Well 59, 60, end 61) were <br />completed upgradiant of the Spoils Spring 3 azaa, chile lour (Wells 62 Lo 65) core <br />completed in the Spoils Spring 1 azaa. The purpose of placing aewral walls at each Bite <br />rae to accurately define the potantiometric surface of the spoils aquifer at each <br />location. Water levels at all o! these spoil ralln exhibit normal seasonal vaziationn. <br />Wall 65 has bean dry for the entire period o! record. It is located in an area chars the <br />epoila aze unsaturated. <br />Ground Water Lawl 5+~:!~. All alluvial wells aze shoring distinct seasonal rater level <br />Fluctuations in response to periods o! precipitation recharge or the lack of <br />precipitation. Overburden and coal roll water levels era fluctuating in xeeponaa to the <br />precipitation rechazge, induced ground rater floc to the mina pits, and in soma canes, <br />changes in reaarvoir rater levels. Spoil wall rater levels still indicate that only the <br />furthaei doxnalope highrall portions of the spoil exhibit significant amovntn o! <br />• saturation. Lewla in a spoil roll near the Wndge Impoundment in lazgely controlled by <br />water level llvetuatione in the impoundment. Water levels in several xella this year rera <br />higher then normal ea n result of high spring runolf. Deraterinq by the Wolf Creak caul <br />mine pit has ranulted in lower than normal rater lewla in one of the wells monitoring <br />that seam. <br />Water Quality. Ground rates samples xare collected from 21 calls on a biannual baaie. In <br />addition, one well (SOVC2) that is required to be sampled did not haw enough water to <br />esmple. The pazametex list used !or nll wells sampled this year is given on Table <. <br />Analyses haw bean performed by ACZ Laboratory in 6teambost Springs, Colorado since Nay <br />31, 1933. ACZ Laboratory performs all analyses by EPA or equivalent methods. Samples sre <br />delivered the day of collection to the lab in an iud cooler. <br />Tha folloring diacuneion of the ennlytical data collected during the reporting period is <br />arranged by strata ~baing monitored and coincides rith the Pozmst (by aquifer type) in <br />rhich the analytical data aze presented in Appandir C. The discussion of rater quality <br />• rill ba limited to a description of total dissolved solids (TDS) concentrntione. A <br />5 <br />