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- Wedge Coal. Wedge coal walla exhibit the same typrcal seasonal variations as the <br />previous aquifers discussed. Dua to low a~luifer tranamissivitiea (range 0.07 to 0.36 • <br />ftZ/day), rater camp ling may mask normal xate:r level fluctuations. Wells WW3, WW4 (South <br />Expana ion area), 14 and 17 all exhibit an in=lease in rater levels over the peat several <br />yeazs. Wells WW16 and 18 have recently displayed decreasing rater levels. <br />- wolf Creek Coal. Wells WWC3 and WWC4 (South Expansion area) both ezhibrt on increase rn <br />water levels over the past several years. <br />Ground Water Level Summary. Host aquifers at Seneca II-W exhibit a typical aeaa onal <br />fluctuation. Water levels aze highest after the spring rvnoff, which recharges the <br />aquifer. Often, bedrock aquifers exhibit a lag time between spring runoff and highest <br />water levala. Water levels then decrease ae late summer or fall approaches. Thra yeac, <br />most bedrock walla drsplayed either normal or higher than normal rater levels, however, <br />Wells wOV1E, WW16, and WW1E have recently displayed decreasing rater levels. <br />Water Quality. Table 3, Summary of Ground Water Monitoring Walla, desccibea the walls <br />that rera sampled, the sample frequency during thin year, and site chazacteria tics. Table <br />4 ahoxs the ground rater pazameter list used for all walla. Analyaee have been performed <br />by ACZ laboratory in Steamboat Springs, Colorado since Hay 31, 1983. ACZ Laboratory <br />performs all analyses by EPA or equivalent ma thodn. Samples are delivered the day oP <br />collection to the lab in an iced cooler. Honi to ring frequencies for ground rater quality <br />may be found on Page 15-3-3 of the Seneca II-W PAP. <br />The following dissuasion of the analytical d-ita collected during the reporting period is <br />arranged by strata being monitored and coincides with the format (by aquifer type) in <br />which the analytical data are presented in Appendix D. The following diacueaion of water <br />quality will limit itself to a description of total dissolved solids (TDS). A separate <br />section, Comparison of Ground Water Quality to Water Use 9tandazda, will list those <br />samples that exceed rater use etandazdn. <br />Data fox each cell in Appendiz D begins with a listing of the rater quality data collected <br />during this yeaz, followed by remarks explaining the sampling procedure. After the <br />remarks ie a statistic report representing bneelim (i.e., premining) data for each cell <br />(whets applicable). On Chia etatia lice report, ''censored data" ref era to analytical <br />values that rera below the detection limit, which were censored from the min/mar/a~aan • <br />Q <br />