FIELD DOCUMENTS_1991-1995 - Laserfiche WebLink

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E 0 CL L ri TOP OF PVC CASING +N rn Equipment 12"and 10" Hollow Stem Augers Elevation Co rn moi Elevation Date 9-7-93 GROUND SURFACE 40 6 10 40 to 41 ft: silt increasing to 40% 16 0 16 LONESTAR OV12 SANDPACK- 4 425 to 57.0 h 6 10 0 4'DIA.SLOTTED SCREEN4 (0.020'slot size)44.0 to 54.0 It = 10 2 45 VERY DARK GRAY SILTY SAND(SM)SY 3/1 12 loose,saturated,85%fine-to medium-grained 7 0 sand,15%sift 10 DARK GREENISH GRAY SILTY CLAY(CL)SG 4/1 3 0 stiff,moist,sand stringers Common — 6 = 8 6 0 12 18 50 4 VERY DARK GRAY CLAYEY SAND(SC)SY 311 7 0 _ medum dense.saturated,60%very fine-grained 4"DIA SCHED.40 PVC — 3 sand,20%clay,20%si t BLANK SILT TRAP = 60 VERY DARK GRAY SAND(SP)5Y 311 54.0 to 54.5 It 12 loose,satura0ad,95%fine-to very fine-grained sand, 4 s%bn 54.5 ft BOTTOM WELL CAP 12 0 VERY DARK GRAY CLAYEY SAND(SC)SY 3/1 15 55 medum fine-grained dense,saturated.60%very 6sand,20%clay,20%San 0 7 DARK GREENISH GRAY CLAY(CL)5BG 411 12 very hard,moist 5%silL sand lense BENTONITE SEAL •• . s 57.0 to 62.5 It •c�.�w 10 DARK GREENISH GRAY CLAY(CL)SG 4/1 q 17 0 hard,moist,5-10%silt trace of organics,some 1s rusty staining,crumbly 19 21 60 6 0 HOLE CLEANED OUT 9 to 625 It vo 17 0 at 62 ft: silt increasing to 30% to VERY DARK GRAY SAND(SP)2.5Y 310 6 0 loose,saturated,fine-grained is VERY DARK GRAY SILTY SAND(SM)2.5Y aro 21 65 loose,saturated,70%fine-to very fine-grained 12 0 22 sand,3046 silt 29 Bottom of borehole at 67.0 It 70 - 75 - 80 Herding Lawson Asaodates Log of Boring and Well Completion DW-1 PLATE Engineering and - Results of Plume Characterization Investigation ^ Environmental Services Shell Oil Distfibution Plant VM t Stockton, Caftfomia DRAWN JOB NUMBER APPROVED DATE REVISED DATE LZc 10433 005 10193