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UNIFIED SOIL CLASSIFICATION SYSTEM <br /> 1 <br /> MAJOR DIVISIONS LTR DESCRIPTION MAJOR DIVISIONS LTR DESCRIPTION <br /> GW Well—graded gravels or gravel sand ML Inorganic silts and very fine— <br /> mixtures, little or no lines grained sands, rock flour, silty <br /> or clayey fine sands or clayey <br /> GRAVEL GP Poorly—graded gravels or gravel SILTS silts with alight plasticity <br />' AND sand mixture, little or no lines AND <br /> GRAVELLY Silt gravels gravel—sand—clayCLAYS CL Inorganic clays of low to medium <br /> SOUS GM y LL<50 plasticity, gravelly clays, sandy <br /> mixtures clays, silty clays, lean clays <br />' Clayey gravels, gravel—sand—clay Organic silte and organic silt— <br /> COARSE GC mixtures FINE OL clays of low plasticity <br /> GRAINED GRAINED organic malts. micaceous or <br /> SOILS Well—graded sands or gravelly SOILS� sande, tittle or no fines MH diatomaceous fine—grained sandy <br /> or siltv soils elastic silts <br /> SAND Poorly—graded sands or gravelly ASND CH Inorganic clays of high plast— <br /> SP AND eands, little or no fines CLAYS icity, !at clays <br /> SANDY LL>50 <br /> ' <br /> SOILS SM Silty sands, nand—silt mixtures OH plasticity <br /> t nic clays of medium to high P Y <br /> SC Clayey sands, sand—clay mixtures HIGHLY ORGANIC Pt Peat and other highly organic <br /> SOILS I soils <br /> ' WELL DESIGN <br /> IDEPTH THROUGH WHICH F-1 SAND PACK <br /> SAMPLER IS DRIVEN <br /> RELATIVELY UNDISTURBED BENTONITE ANNULAR SEAL <br /> SAMPLE <br /> MISSED SAMPLE ® NEAT CEMENT ANNULAR SEAL <br /> ® GROUNDWATER LEVEL BLANK PVC <br /> _ OBSERVED FROM FIRST WET <br /> SOIL SAMPLE IN BORING <br /> ' 0 STATIC GROUNDWATER LEVEL Ej MACHINE—SLOTTED PVC <br /> OVM ORGANIC VAPOR METER READING S-10 SAMPLE LOCATION <br /> IN PARTS PER MILLION <br /> NR NOT RECORDED <br /> ' PHOTO—IONIZATION DETECTOR READING NA NOT ANALYZED <br /> PID IN PARTS PER MILLION <br /> ' BLOW/FT REPRESENTS THE NUMBER OF BLOWS OF DASHED LINES SEPARATING UNITS ON THE LOG <br /> A 140—POUND HAMMER FALLING SO INCHES REPRESENT APPROXIMATE BOUNDARIES ONLY <br /> TO DRIVE THE SAMPLER THROUGH THE LAST ACTUAL BOUNDARIES MAY HE GRADUAL. LOGS <br /> 12 INCHES OF AN 18—INCH PENETRATION REPRESENT SUBSURFACE CONDITIONS AT THE <br /> BORING LOCATION AT THE TIME OF DRILLING <br /> ONLY <br /> UNIFIED SOIL CLASSIFICATION SYSTEM ATTACHMENT <br /> AND LO® OF BORINGS SYMBOL KEY <br /> FORMER UNOCAL SERVICE STATION 5098 D <br /> 5608 Pacific Avenue <br /> PROJECT 2279 Stockton, California <br /> 1 <br />