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• <br /> <br />Table 4 <br />Cation-exchange capacity of local soils and clay alluvium <br />SAMPLE N0. LOCATION <br />P 0325-1 Clay alluviums <br />Toe of dam, <br />Drill hole SA e~ 24-29' <br />P 0325-2 Clay alluviums <br />Toe of dam, <br />Drill hole lA ~ 35-38' <br />P 0325-3 Clay alluvium; <br />Head of hollow, <br />Drill hole 2 ~ 5-9' <br />P 0318-4 Clay soil used in <br />revegetation of coal pile <br />CATION-EXCHANGE CAPACITY (meq/1008) <br />Exchangeable Cations <br />CEC Na K Ca Mg <br />X7.2 0.25 0.46 19.5 4.19 <br />22.6 0.41 1.14 23.3 4.97 <br />14.2 0.14 0.41 22.5 4.03 <br />18.3 0.09 0.50 25.4 4.56 <br />P 0318-5 Undisturbed clay soil <br />between impoundment dam <br />and creek <br />P 0918-6 Disturbed clay soil from <br />within existing impound- <br />ment dam <br />37.3 0.89 0.36 20.9 12.8 <br />24.9 0.09 0.77 23.8 4.24 <br />12 <br />