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UNIFIED SOIL CLASSIFICATION SYSTEM (USCS) Group Graphic GROUP NAME MAJOR DIVISIONS Symbol Symbol Well-graded GRAVEL Clean Gravels GW Well-graded GRAVEL with Sand _ poorly-graded GRAVEL Gravels GP •="' poody-graded GRAVEL with Sand i.'J 50%or more of Silty GRAVEL coarse fraction Gravels GM Silty GRAVELwith Sand :e-grained retained on with fines Clayey GRAVEL oils no.4 sieve GC Clayey GRAVEL with Sand than 50% - Well-graded SAND ined on SW - Well-graded SAND with Gravel 0 sieve Sands Clean Sands poorly-graded SAND More than 50% SP Poorly-graded SAND with Gravel of coarse fraction SM Silty SAND/Clayey SAND with Gravel passes Sands no.4 sieve with fines SC Silty SAND/Clayey SAND with Gravel SILT I SILT with Sand or Gravel ML Sandy SILT I Sandy SILT with Gravel Gravelly SILT I Gravelly SILT with Sand Lean CLAY/Lean CLAY with Sand or Gravel Silts and Clays lean CLAY I Sandy lean Clay with Gravel CL Sandy Gravelly Is CLAY with Sand Liquid limit Gravelly lean CLAY I 50%or less Organic SILTS or organic CLAYS -grained OL of low plasticity Soils Elastic SILT/Elastic SILT with Sand or Gravel Sandy elastic SILT I Sandy elastic SILT with Gravel or more MH Gravelly elastic SILT I Gravelly elastic SILT with Sand asses Fat CLAY/Fat CLAY with Sand or Gravel -00 sieve Silts and Clays Sandy fat CLAY I Sandy fat CLAY with Gravel CH Gravelly fat CLAY I Gravelly fat CLAY with Sand Liquid limit greater than 50% OH \\�� Organic CLAYS or organic SILTS of medium to high plasticity pEAT,MUCK and other highly organic soils Highly Organic Soils PT NOTES: 1) Subsurface information from boring and test pit logs depict conditions SAMPLE TYPES only at the specific locations and dates indicated. Soil conditions and water levels at other locations may differ from conditions at these locations. Also the conditions at these locations may change with 2"O.D. 2"O.D. 1"O.D. time. modified manual Geoprobe California drillen hand liner 2) Blow counts on logs are the number of blows to drive the sampler 12 Sampler Sampler Sampler inches with a 140 pound hammer falling 30 inches unless otherwise specified. 3) USCS soil classification reference=ASTM Standard D2487-85. ively turbed Z 1_1.98 water level and date measured(if applicable) irbed FREY ENVIRONMENTAL, INC. .ecovery BORING LOG LEGEND AND UNIFIED SOIL CLASSIFICATION SYSTEM