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UNIFIED SOIL CLASSIFICATION SYSTEM MAJOR DIVISIONS LTR DESCRIPTION MAJOR DIVISIONS LTR DESCRIPTION G W Well-graded gravels or gravel sand mixtures,little Inorganic sihs and very fine sands,rod(flour, GRAVEL or no fines. SILTS M L silty or clayey fine sands or clayey slhs with AND G P Poorly-graded gravels or gravel sand mixture,little slight plasticity or no fines. AND Inorganic clays of low to medium plasticity, GRAVELLY CLAYS C L gravelly clays,sandy days,silty days,lean G M Silty gravels,gravel-sand-sift mixtures. clays. SOILS LL<50 COARSE FINE Organic sifts and organic sift-clays of low G C Clayey gravels,gravel-sand-day mixtures. 0 L plasticity GRAINED GRAINED SAND S W Well-graded sands or gravelly sands,little or no Inorganic silts,micaceous or diatomaceous SOILS floes. SOILS SILTS M H fine or sihy soils,elastic silts. AND AND Poorly-graded sands or gravelly sands,little or no SANDY S P fines. CLAYS C H Inorganic clays of high plasticity,fat days. SOILS S M Silty sands,sand,and sift mixtures. LL>50 0 H Organic days of medium to high plasticity: S C I Clayey sands,and day mixtures. HIGHLY ORGANIC SOILS P t Peat and other highly organic soils. Major changes information Blank casing /— — Minor changes in formation Screened casing Standard penetration split spoon sample © Cement grout Modified California(Porter)sample Bentonite IShelby tube sample Sand pack or gravel pack Water level observed in boring T Stabilized water level Percent Soil Content NFWE No free water encountered Trace 0- 10% Little 10-20% NOSC No odor,scent,or fluid cut Some 20-30% Sandy OVA Organic VaporAnalyzer Silty 30-50% Clayey PID Total organic vapors(parts per million)measured by a photoionization device NOTES: Blow counts represent the number of blows of a 140-pound hammer falling 30 inches required to drive a sampler through the last 12 inches of an 18-inch penetration. The lines separating strata on the logs represent approximate boundaries only. The actual transition may be gradual. No warranty is provided as to the continuity of soil strata between borings. Logs represent the soil section observed at the boring location on the date of drilling only. References to plasticity of cohesive soils are based on qualitative field observations and not on quantitative field or laboratory tests. Qualitative soil plasticity is noted solely to aid in stratigraphic correlation and is not intended for geotechnical characterization of soils. BORING LOG LEGEND PLATE K L E I N F E L D E R O'CONNOR WOODS B_1 PROJECT No. 24-160209-A00 STOCKTON, CALIFORNIA