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<br />TABLE 3.4.A.13 <br />SLAKE DURABILITY TEST RESULTS <br />L <br />April 1989 <br />Roc1c <br />Type Seam Hole <br />No. Depth <br />(ft) S.D. Index <br />(%) Classification <br />{Durability) <br />Shale B roof SOM-57 944 50 Low <br />Shale P. roof SOM-34 1,096 85 Medium High <br />Shale B roof MG-4 573 72 Medium <br />S}~ale/r_oal B floor SOM-34 1,124 93 P}edium High <br />Shale E floor SOM-57 960 95 Higli <br />Carbonaceous <br />shale <br />E.floor <br />SOM-54 <br />1,251 <br />95 <br />High <br />Carbonaceous <br />shale <br />E roof <br />SOM-54 <br />1,241 <br />66 <br />Medium <br />Carbonaceous <br />shale <br />E roof <br />SOM-66 <br />797 <br />46 <br />Low <br /> <br /> <br />