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C C 0 u J r 0 11 L 0 u C CIS LOG OF EXPLORATORY BORING PROJECT NUMBER 939-03.14 BORING NO. MW -2 PROJECT NAME San Joaquin County - Corral Hollow Landfill PAGE 1 OF 9 BY S. Lofholm DATE 5/11/88 SURFACE ELEV. 303.39' POCKET PENETRA p N = . W LITHO- J RECOVERY PENETRO- METER TION jW W OF- �LL IL J GRAPHIC J~ DESCRIPTION (FT/FT) (TSF) (BLOWS/ Ft.) C7 J OZ N Q N COLUMN 3W p ML SANDY SILT, dark grayish brown (1 OYR, 5/2); 5-10% fine to medium sand; trace fine gravel; loose; dry to damp. 5 GM SILTY SANDY GRAVEL, light olive gray (5Y, 6/2); 10-15% low plasticity fines; 20-25% very fine to coarse sand, subangular to subrounded, predominantly quartz, 30% metamorphics; fine to medium gravel, subangular to subrounded, 10 -_SM predominantly metamorphics; damp to moist. SILTY SAND, dark brown (IOYR, 4/3); 5-10% fines; fine to coarse sand, 65% fine, 20% medium, 15% coarse sand, predominantly round, trace subrounded, predominantly 15 quartz; 10% fine to medium gravel; gravel predominantly metamorphics; damp. @ 16': percentage of gravels increasing to 15%; damp to dry. SP :::: GRAVELLY SAND, brown (IOYR, 5/3); 5% 20 GP ::::: low plasticity fines; fine to coarse sand, 60% :.. fine, 35% medium, 5% coarse, predominantly . . : quartz, subrounded; 35-45% fine to medium ... gravel, subrounded, predominantly metamorphics; damp. 25 .... 30 GP SANDY GRAVEL, yellowish brown (1 OYR, 5/4); 5% fines; 15-20% sand, 40% fine, 60% medium to coarse; fine to coarse gravel, predominantly metamorphics; damp. 5 35- qp 401 40 REMARKS Drilled by 10 -inch air rotary casing -hammer; samples collected with 2.5 -inch outside -diameter modified California split -spoon sampler. Borehole converted to 5 -inch EIVICON monitoring well as shown on Well Details. ASSOCIATES