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Well No. 2, penetrating the weathered bedrock surface is <br />• of a sodium sulfate type. Water in the coal zone, and <br />probably the overlying siltstone, is of a sodium sulfate to <br />sodium bicarbonate type as indicated from the sample <br />collected in Well No. 1-A. The total disolved solids in <br />each well were high, although in the near surface <br />aquifer TDS was extremely high, exceeding 7000 mg/1. <br />High sulfates and TDS in the ground water make it generally <br />poorly suited for domestic use. The sodium absorption <br />ratio of samples from wells 1 and 1-A is high to very high. <br />This presents severe limitations for use of the water for <br />irrigation. The sample from Well 2 in the shallow surface <br />aquifer has an acceptable SAR but a very high TDS creating <br />• a salinity hazard which again Limits its use for irrigation. <br />Ground Water Monitoring <br />Ground water monitoring at the proposed mine will be conducted <br />on a quarterly basis. We11s 1, 1-A and 2 will be included <br />in this program. In addition, a fourth well, constructed <br />into the siltstone and sandstone sequence immediately over- <br />lying the Sudduth seam will be constructed at a point 1400 ft. <br />south and 600 ft. east of the northwest corner of Section 11. <br />This well, located on Plate I, will be designated 3-A. We11 <br />No. 1 may also have to be moved northward to avoid interference <br />caith the sediment pond. <br />• <br />11 <br />