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o' E on o ma m TOP OF PVC CASING L L Equipment 10"Hollow Stem Auger Elevation 3 ¢a m cr GRWND SVRFACE m O¢ Elevation Date 8-25-93 TOP OF CASING 0 GRAYISH BROWN SILTY SAND(SP)10YR 512 at ground surface loose,dry,fine-to very fine-grained sand, 10%silt 10'DIA.BOREHOLE 0.0-31.5 It 4'DIA.SCHED.40 PVC BLANK CASING DARK GRAYISH BROWN LEAN CLAY(CL)10YR 4/2 0.0 to 5.0 h = 5 moderately soft,moist,20%silt,micaceous,rusty BENTONITE-CEMENT SEAL = 5 0 staining,laminations 0.0 to 3.5 ft — 5 — 5 BENTONITE PELLET SEAL 3.5 to 5.0 h LONESTAR 02/12 SANDPACK VERY DARK GRAYISH BROWN CLAY(CL)10YR 3/2 5.0 to 31.5 It = 3 0 10 hard,moist 5%sand 4'DIA.SLOTTED SCREEN — s (0.020'slot size)5.0 to 29.5 ft = B Y a 0 15 VERY DARK GRAY SAND(SP)SY 2.5/1 1p moderately dense,moist 80%very fine-Brained 14 sand,10%sift,10%clay,some cracks VERY DARK GRAY SILTY SAND(SM)SY 2.5/1 moderately dense,saturated,601/6 very fine-grained s 0 20 sand,3D%silt, 10%clay,some cracks,micaceous = 9 10 VERY DARK GRAY SAND(SP)5Y 2.5/1 moderately dense,moist 80%very fine-grained sand, 16 silt 10%clay,some cracks 1 0 25 - 4 BLACK SAND(SP)5Y 2.5/1 BOTTOM WELL CAP Uloose,wet fine-to medium-grained sand 29.5 It 1 0 30 12 HOLE CLEANED OUT s to 31.5 It 12 VERY DARK GREENISH GRAY SILTY CLAY(CL) 2 BENTONITE PELLET 1 513 4/1 very hard,moist 40%silt trace of angular 3 gray clayey clasts BACKFILL 31.5 to 34.5h S 10 Bottom of boring at 34.5 ft 35 40 100empu Hardil Lawson Awodatas Log of Boring and Well Completion MW-27 PLATE Engineering and Results of Plume Characterization Investigation A . Environmental Services Shell Oil Distribution Plant SVS t : e e Stockton, California DRAWN JOB NUMBER APPROVED DATE REVISED DATE LZc 10433 005 b 411/ 10/93