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MONITORING WELL LOG SAMPLING MW-1 nple Type rs Per Foot "E c:,.. > BORING DRILLING METHOD Hollow Stem Auger DATE COMPLETED. 8 /2 0/91 tuna m cn 2 CO CD < tn SYMBOLS DESCRIPTION 0 " - U U 20 16 2.5 3.1 ML '.---lncrease BROWN SANDY SILT, fine grained, some medium grains, trace of subangular gravel, dry, some mica, trace iron oxide . staining. ' in micaceous fine grained sand, moist, some clay and \ \ \ N \--. \ \ A L \ black mottling with depth. r , 5- . U 1 8 2.5 GREENISH-GRAY TO BROWN CLAY, stilt, moist, low plasticity, . abundant black mottling, trace ot iron oxide stained concretions. ' rrAn r [ - U 8 CH 10- 2.5 . --- DARK GRAY CLAY, soft, moist, medium to high plasticity, slight blocky structure. , . 1-- 1.1.1 ill LI_ U 13 2.5 CL GREENISH-GRAY CLAY, medium stiff, moist, medium to low plasticity, abundant iron oxide stained pores (up to I mm diameter). - .. , cc ,.., i-z c3 DEPTH IN . . U 13 2.5 _ ML 15 BROWN CLAYEY SILT, saturated, micaceous, trace of black mottling and iron oxide staining, trace macro pores. a.] - z ci . ,... _._ ,-, [4 SCREENEI U U U 8 7 8 - 2.5 2..41 _ CL BROWN SILTY CLAY, wet, soft, micaceous. Color grading to olive and brown, decrease in iron oxide staining. ' -20 25- 30--30 NOTES: i) 12-INCH BORING COMPLETED TO 24.0 FEET BELOW GROOM SURFACE ON 8/20/91 MONITORING WELL COMPLETED ON 1312019L 4-INCH SCHEDULE 40 PVC BLANK CASING INSTALLED TO 6.85 FEET BELOW GROUND SURFACE. 4 -INCH SCHEDULE 40 PVC 0.010 SLOTTED SCREEN INSTALLED 6.85 TO 21.85 FEET BELOW GROUND SURFACE. 1-25 , . . I. -35 35 177-* DAMES & MOORE METROPOLITAN STEVEDORE Stockton, California APRIL 1992 Page I ot 1 12650-011-044