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unusually high TDS values of 16,700 and 14,300 mg/l were observed at <br />this well. These values are over twice the historic average, 7736 mg/l, <br />for this well. However, the TDS value for this well this year dropped <br />back down to a value within the 1988-2007 range. <br />The Seneca II-W PHC predicts an annual average TDS value of 2630 mg/1 <br />for Well WW14, while a value of 5260 mg/l was observed this year. For <br />Well WW17, a value of 3002 mg/l was predicted, while a value of 750 mg/1 <br />was observed this year. <br />As noted in the previous paragraph, Well WW14 experienced this year a <br />TDS exceedance of the PHC prediction. This prediction was based on <br />several assumptions. 1) Baseline water quality values were an average of <br />all Wadge coal wells at Seneca II-W. 2) Aquifer characteristics were an <br />average of all Wadge coal wells at Seneca II-W. 3) The Wadge coal seam <br />was saturated for its entire thickness (11.8 feet). <br />These assumptions, however, do not hold true for Well WW14. Prior to <br />mining in the north area (November 1992), this well was almost always <br />dry (see the 1993 AHR for a complete listing of earlier water level <br />data). Since this particular portion of the Wadge seam was dry prior to <br />mining, spoils water will now contribute 100% of the water present. <br />Agricultural ground water standards were exceeded this year at certain <br />monitoring wells. Tab 7 of the Seneca II-W PAP contains a section that <br />discusses the suitability of using water from the various aquifers <br />monitored at the Seneca II-W Mine for irrigation or livestock watering. <br />The discussion mentions that all aquifers prior to mining at the Seneca <br />II-W Mine have exhibited several parameter concentrations in excess of <br />both irrigation and livestock standards compared, rendering them <br />questionable regarding their suitability for either irrigation or <br />livestock. All bedrock aquifers affected by mining have been determined <br />to have transmissivities less than 100 ft2/day, which would also <br />preclude their use for yielding sufficient water for irrigation, or even <br />livestock. <br />10