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LOG OF EXPLORATORY BORING PROJECT NUMBER 939-03.14 BORING NO. MW -5 PROJECT NAME San Joaquin County - Corral Hollow Landfill PAGE 4 OF 5 BY S. Lofholm DATE 4/13/88 SURFACE ELEV. 297.44' ML CLAYEY SILT, light yellowish brown (2.5Y, 1.5/1.5 55 65 6/4); low plasticity fines; 5% fine sand; thin wavy laminations; moderate very fine muscovite along laminations; moderate iron oxide staining along laminations; few thin (0.1") fine sandy interbeds; hard; moist. 1 1.5/1.5 38 6/1/8870 @ 70': pale olive (5Y, 6/3); 5-10% fine sand in thin (0.1") sandy interbeds; moderate iron oxide along interbeds; possibly bioturbated; moist. 1.5/1.5 37 75 @ 75': olive (5Y, 5/3); manganese oxide coating, some laminations; moderate iron oxide (0.1") concretions; thin (0.1-0.2") carbonaceous zones; moist to wet. POCKET PENETRA- ZMJ =� W LITHO- LITHO- RECOVERY PENETRO TION �W W h0. W J a.METER GRAPHIC _j JH DESCRIPTION (BLOWS/ 1X3W WZ ¢ COLUMN 3WW (FT/FT) (TSF) Ft.) O J H N O 1.5/1.5 45 CL SANDY CLAY, light olive brown (2.5Y, 5/4); low plasticity fines; 20-25% fine sand in thin (0.1") interbeds; trace manganese oxide; trace disseminated iron oxide concretions; trace muscovite; hard; moist. ML CLAYEY SILT, light yellowish brown (2.5Y, 1.5/1.5 55 65 6/4); low plasticity fines; 5% fine sand; thin wavy laminations; moderate very fine muscovite along laminations; moderate iron oxide staining along laminations; few thin (0.1") fine sandy interbeds; hard; moist. 1 1.5/1.5 38 6/1/8870 @ 70': pale olive (5Y, 6/3); 5-10% fine sand in thin (0.1") sandy interbeds; moderate iron oxide along interbeds; possibly bioturbated; moist. 1.5/1.5 37 75 @ 75': olive (5Y, 5/3); manganese oxide coating, some laminations; moderate iron oxide (0.1") concretions; thin (0.1-0.2") carbonaceous zones; moist to wet.