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MAJOR DIVISIONS LTR DESCRIPTION MAJOR DIVISIONS LTR DESCRIPTION <br /> GW Well-graded gravels or gravel-sand ML Inorganic silts and very fine sand,rock <br /> mixtures,little or no fines flour,silty or clayey fine sands,or <br /> clayey silts with slight plasticity <br /> GRAVEL GP Poorly-graded gravels or gravel-sand SAND Inorganic clays of low to medium <br /> GRAVELLY mixture, little or no fines CLAYSlastici <br /> CL plasticity,gravelly clays,sandy clays, <br /> SOILS GM Silty gravels, gravel-sand-silt mixtures LL<50 silty clays, lean clays <br /> Clayey gravels,gravel-sand-clay Organic silts and organic silt-clays of <br /> GCFINE OL low plasticity <br /> COARSE mixtures <br /> GRAINED RAINED Inorganic silts, micaceous or <br /> SOILS SW Well-graded sands or gravelly sand, SOILS MH diatomaceous fine sandy or silty soils, <br /> SAND little or no fines SILTS elastic silts <br /> ANDPoorly-graded sands or gravelly AND CH Inorganic clays of high plasticity,fat <br /> SANDY SP sands,little or no fines CLAYS clays <br /> SOILS LL>50 <br /> SM Silty sands,sand-silt mixtures OH Organic clays of medium to high <br /> plasticity <br /> SC Clayey sands,sand-clay mixtures HIGHLY ORGANIC Pt Peat and other highly organic soils <br /> SOILS <br /> Recovery Symbol Codes <br /> ' Sample collected for chemical analysis <br /> Interval of recovered soil core collected with a continuous sampler <br /> Interval of recovered soil core collected with a drive sampler <br /> ® Interval of no recovery <br /> Boring Symbols Code <br /> Grout Filter material <br /> Bentonite <br /> Fill material <br /> 1. Dashed lines separating soil strata on the boring logs represent inferred boundaries between sampled intervals <br /> that may be abrupt or gradual transitions. Solid lines represent approximate boundaries observed within <br /> sampled intervals. <br /> 2. Soil color described according to Munsell Soil Color Chart, 1990 Edition, revised. <br /> 3. OVM=organic vapor meter reading in parts per million(ppm);the maximum concentration range of the OVM <br /> is 10,000 ppm;O.R. is> 10,000 ppm <br /> C34990499-04 11/13/96 <br /> EXPLANATION OF BORING LOGS Project No. <br /> HANSON PROPERTY (APN 252-040-02) C3499 <br /> GEOMATRIX 7750 Schulte Road, Tracy, California Figure <br /> A-1 <br />