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' UNIFIED SOIL O L CLASSIFICATION SYSTEM-VISUAL CLASSIFICATION OF SOILS (ASTM D-2488) MAJOR GROUP GROUP NAME DESCRIPTION DIVISIONS SYMBOL ' a�a�a�aha Well-graded gravel a a a eVa Well-graded gravels or gravel-sand b4a4 Oada Cil W Well-graded gravel with sand mixtures little or no(vies C}400 ' GRAVEL 0:0:0,0,0 Poorly-graded gravel O.0.0 O o G P Poorly graded gravel with sand sPoorly-graded gravels or gravel AND .0�0'0'O'O sand auxture Little or no fines GRAVELLY 0`000`0 Siltyave! ' gr Silty gravels gravel-sand-silt SOILS 0'0'0'0'0 GM Silty gravel with sant mixtures 0`0`000 1 Clayey gravel Clayey gravels gravel-sand-clay COARSE G C Clayey gravel with sand mixtures ' GRAINED SOILS SW Well-graded sand Well-graded sands or gravelly Well-graded sand with gravel sands little or no fines ' SAND S P Poorly graded sand Poorly graded sands or gravelly AND with Poorly graded sand gravel sands Little or no fines r r \ \ SANDY \ \♦\♦\♦\\♦ SM Silty sand Silty sands sand silt mixtures SOILS \ ♦ ♦ ♦ ♦ Silty sand with gravel f a sand f S C Clayey Y Clayey sands sand-clay mixtures Clayey sand with gravel ' ♦♦\♦\♦♦\• ♦��♦♦\♦♦\ Silt Silt with sand Silt with silts and very gravel g fine ♦\�\\\\\ sands rock flour silty or SILTS \\\\\\\♦� ML Sandy silt Sandy sift with gravel tY \♦•\\♦♦\• ♦♦\\♦♦♦♦\ Gravelly st Gravelly silt with sand clayey fine sands or clayey Y AND ♦\\♦\\\\\ silts with slight ptasticitv Lean day Lean day with sand Lean clay with gravel Inorganic days of low to medium FINE CLAYSC L Sandy lean clay Sandy lean clay with gravel plasticity gravelly days sandy Gravelly lean clay Gravelly lean day with sand clays silty clays lean clays GRAINED Elastic silt Elastic silt with sand Elastic silt with ave ' ELASTIC t�tw��t� gr Inorganic silts micaceous or SOILS Sand elastic silt Sand elastic silt with rave! MH Y Y g diatamaceous fine sandy or silty SILTS Gravelly elastic silt Gravelly elastic silt with sand soils elastic silts AND Fat clay Fat day with sand Fat clay with gravel Sandy fat clay Sandy fat clay with gravel Inorganic days of high plasticity CLAYS C H Gravelly fat clay Gravelly fat clay with sand fat clays Organic soil Organic soil with sand Organic soil with gravel Organic silts and organic silt OL/OH Sandy organic soil Sandy organic soil with gravel clays of low plasticity Gravelly organic soil Gravelly orgaiuc 6011 with sand Organic days of medium to high HIGHLY plasticity ORGANIC SOILS Pt Peat Peat and other highly organic soils WELL CONSTRUCTION EXPLANTION SOIL BORING NOTES SANDS &GRAVELS BLOWS/FT SILTS do CLAYS BLOWS/FT Blank well casing Blow count represents the number of blows of a Neat cement or 140-lb hammer falling 30 inches per blow required VERY LOOSE 0 5 SOFT 0 - 5 sand slurry seal to dive a sampler through the Inst 12 orches of an LOOSE 5 12 FIRM 5 - 10 lfrinch penetration. Bentonite sealMED DENSE 12 37 STIFF 10 - 20 of in warranty is provided n s the continuity DENSE 37 - 62 VERY STIFF 20 - 40 of soil strata between borings Logs represent the sod section observed at the boring location VERY DENSE OVER 62 HARD OVER 40 Well sancipack an the date of drilling only S-Sampler sank into medium under the weight of _ the hammer(no blow count) = Approximate stabilized water level Well screen P-Sampler was pushed into medium by drilling ng (no blow count) Approximate first encountered water level NR - No Recovery SOIL BORING LOG C L EARW ATE R AND APPENDIX C Group, Inc. WELL CONSTRUCTION DIAGRAM PLATE LEGEND C-1 r