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MAJOR DIVISIONS TYPICAL NAMES <br /> GW Well graded grovels with or without sand, little or <br /> GRAVELS CLEAN GRAVELS •' : - -- no fines <br /> ---__ - - - <br /> wrrH LITTLE `. <br /> OR NO FINES . . GP Poorly graded gravels with or without sand, little or <br /> —Cn' MORE THAN HALF no fines <br /> COARSE FRACTION <br /> Silt <br /> N 15 LARGER THAN GM ravels, silt <br /> C) NO. 4 SIEVE SIZE GRAVELS WITH <br /> Y 9 y gravels with sand <br /> —OVER 15% FINES <br /> C, GC Clayey grovels, clayey gravels with sand <br /> � g <br /> 0 SW Well graded sands with or without gravel, little or <br /> w � CLEAN SANDS no fines <br /> a - WITH� SANDS OR NO RMfSSP Poorly graded sands with or without ravel little or <br /> O no fines gravel, <br /> U MORE THAN HALF <br /> COARSE FRACTION <br /> o IS SMALLER THANASANDrH <br /> SM Silty sands with or without grave! <br /> NO. 4 SIEVE SIZE SC Clayey sands with or without gravel <br /> MIL Inorganic silts and very fine sands, rock flour, silts <br /> (nwith sands and gravels <br /> J $ SILTS AND CLAYS CL Inorganic clays of low to medium plasticity, clays <br /> N z with sands and gravels, lean clays <br /> LIQUID LIMIT 50% OR LESS <br /> Z 1 1 OL Organic silts or clays of low plasticity <br /> JOH <br /> Inorganic silts, micaceous or diatomaceous, fine <br /> N <br /> W SILTS AND CLAYS sandy or silty soils, elastic silts <br /> z <br /> LIQUID UMrr GREATER THAN 50X Inorganic clays of high plasticity, fat clays <br /> Organic silts or clays of medium to high plasticity <br /> HIGHLY ORGANIC SOILS PT Peat and other highly organic soils <br /> PID Volatile vapors in ppm Observed contact <br /> bgs below ground surface - —--- Inferred contact <br /> (2.5YR 6/2) Soil color according to Munsell Na soil sample recovered <br /> Soil Color Charts (1993 Edition) - <br /> "Undisturbed" sample <br /> SLOWS/FT. Sample drive hammer weight - <br /> 140 pounds falling 30 inches. First encountered groundwater level <br /> Blows required to drive sampler I Static groundwater level <br /> 1 foot are indicated on the logs. <br /> UNIFIED SOIL CLASSIFICATION <br /> G E r T l ER - RYAN INC. ASTM D 2488-85 <br /> 6747 Sierra CL., Suite J AND <br /> Dublin, CA 94568 (925) 557-7555 KEY TO SAMPLING DATA <br /> FILE NAME: P: PTYPES SLOG—KEY.DWG I Layout Tab: Wog Key <br />