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ground surface <br /> 1s ,� • y native material <br /> 2 <br /> 3 <br /> 4 bentonite chips(hydrated) <br /> 5 <br /> 6 <br /> 7 <br /> 8 <br /> 9 <br /> 10 <br /> 11 <br /> 12 <br /> 13 grout <br /> 14 <br /> 15 <br /> 16 <br /> 17 <br /> 18 <br /> 19 <br /> (a 20 <br /> 21 <br /> 5 22 <br /> 23 <br /> 24 -- — - - <br /> 25 ! bentonite (h chips (hydrated) <br /> P Y ) <br /> 26 <br /> 27 ----- ----- ------ ------ ---- <br /> 28 <br /> 29 sand pack <br /> 30 <br /> 31 <br /> 6.25 inch - <br /> BORING ABANDONMENT <br />