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<br /> <br /> <br /> <br /> <br />1 <br /> <br />1 <br /> <br />1 <br /> <br /> <br />1 <br /> <br />1 <br /> <br /> <br /> <br />1 <br /> <br />STEEPEN ROBERTSON 8 KIRSTEN <br />Consultlng Engineers 8 ScientlsU Project: San Luis-Lower Impoundment <br />ob. No.: 14717 Page 1 of 1 <br />data: 12-18-92 <br />Feature: Tailings <br />Bore Hole Lo Hole No. 10 Location: N205567, E2037969, EL 8559.77' <br />DEPTH DESCRIPTION AILINGS) COMMENTS <br />0-9' fine grained sand, gray to It bm, <br />moist, loose host present In upper 1 /2' <br /> <br />9' - 1 B' floe grained sand, It bm, mad moist to <br />moisk mad danae• <br /> <br />1 B - 2T floe grained sand, grey-bm, moist to very <br />moisk iooae to mad dense <br /> <br />2T - 36' floe grained sand, grey-bm, moist to <br />v moisk loose to mad dense <br /> <br />36• - 45' flna grained sand, grey-bm, very moist <br />loose occ. lenses of medldenae material <br />encountered <br /> <br />45' - 54' floe to mad grained, It bm, moisk <br />loose to mad dense <br /> <br />54' - ti3' fine grained sand, grey-bm, moisk <br />loose to mad dense <br /> <br />63' - BT NO RECOVERY <br />SRK has 63' - 72 drive sample - no rai:overy first try <br />did recover on sate d <br /> <br />'6T - 75' had to drive sampler deep to recover sample <br />and Is robabl not re . o} insitu condition <br /> <br />75' - 81' fine grained sand, goy-bm, very moisk <br />loose drive sampler not ropresentatlve <br />of inaitu due 8' drive' <br /> <br />81' - 90' flna grained sand, grey-bm, wek iooae <br />SRK has 72' - 81 <br /> <br />90' - 99' flna grained sand, grey-bm, wek loose <br /> HOLE CAVED -TERMINATED BORING <br /> <br /> <br /> HOLE CAVED -TERMINATED BORING <br /> <br />