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DEFICIENCY EXCESS <br /> %SLUVA <br /> 10 I I q <br /> � I •I � <br /> i <br /> SANDsrDNE IO . <br /> SHALE • <br /> li��.M • <br /> Z$ l..Ts • <br /> i . ; < <br /> 20 • <br /> COAL SEAM • <br /> LIMESTONE <br /> -25 <br /> • <br /> ORAL COAL SEAM <br /> 30 <br /> low 100 10-6 4 2 I 1 2 4 6 b OD Ow a <br /> CO G03 EQUIVALENT PN <br />' (TCNSlniMWM TCNS of MATERIAL) <br />. Figure 1. Acid-base account of the Kentucky no. 11 and no. 12 coal <br /> overburden. <br /> r� <br /> S <br /> a <br />