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SCALE: I /8" = I' <br />3.0` <br />SANDSTONE <br />a �--- -� <br />SHALES Ih •II <br />2 `6" MIN. <br />2a 6 M /N, O <br />/0 ` M /M. <br />DIRT BACKFILL <br />SHALE <br />RE-BAR HORIZONTAL a VERTICAL LAYERS <br />TYPICAL PORTAL SEAL PLAN <br />�,US ®; <br />