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UNIFIED SOIL CLASSIFICATION SYSTEM -VISUAL CLASSIFICATION OF SOILS (ASTM D-2488) MAJOR GROUP GROUP NAME DESCRIPTION DNISIONS SYMBOL ¢0p06040; Well-graded gravel Well-graded gravels or gravel-sand a000a0a0a G W Well graded gravel with sand nuxtures little or no fines de0a0a0a GRAVEL .0.4.0.0. Poorly-graded gravel Poorly-graded gravels or gravel .0.0.0.0. . G P Poorly-graded gravel with sand 4400sand mixturemixturelittle or no fines AND GRAVELLY '0'0'4'0' Silty gravel Silty gravels gravel-sand-silt '0'4'0'0' GM Silty gravel with sand mixtures SOILS 'p' Clayey gravel Clayey gravels gravel sand-clay COARSE G C Clayey gravel with sand mrxtwes GRAINED SOILS Sw Well graded sand Well-graded sands or gravelly Well graded sand with gravel sands little or no fines Poorly-graded sand Poorly graded sands or gravelly SAND S Poorly-graded sand with gravel sands little or no fines AND SANDY •••••••••• Siltysand SOILS ♦•••••�••• SM Silsandwith gravel Silty sands sand silt mixtwes f�lrf 1 r SC Clayey sand Clayey sands sand-day mixtures Clayey sand With gravel •~•••�•�•* Silt Silt with sand Silt withavel Inorganic silts and very fine sans roc gr sands flour silt or SILTS •••••••••• ML Sandy silt Sandy silt with gravel Y ••r••••••r Gravelly silt Gravelly silt with sand clayey fine sands or clayey •r•�••�••♦ AND silts with slight plastiatv Lean clay Lean day with sand Lean clay with gravel Inorganic clays of low to medium t FINE CLAYSC L Sandy lean clay Sandy lean clay with gravel plasticity gravelly clays sandy Gravelly lean clay Gravelly lean clay with sand clays silty clays lean clays GRAINED t�,t��tt�ti ELASTIC Elastic silt Elastic silt with sand Elastic silt with grave Inorganic silts micaceous or SOILS i �w�t;�� G t��tttt« M H Sandy elastic silt Sandy elastic silt with gravel diatamaceous fine sandy or silty SILTS � Gravelly elastic silt Gravelly elastic silt with sand soils elastic silts AND Fat clay Fat clay with sand Fat clay with gravel Inorganic clays hi h plasticity Sandy fat clay,Sandy fat clay with gravel B Y g P ty CLAYS C H Gravelly fat clay Gravelly fat clay with sand fat clays Orgaruc 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 plasbnty Gravelly orgaruc soil Gravelly organic soil with sand Organic clays of medium to high HIGHLY plasticity ORGANIC SOILS Pt Peat Peat and other lughly 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 140-1b hammer falling 30 inches per blow regwred VERY LOOSE 0 - 5 SOFT 0 5 sand cement slurrseal to drive a sampler through the last 12 inches of an LOOSE 5 12 FIRM 5 10 IB-inch penetration. Bentorute sealMED DENSE 12 - 37 STIFF 10 20 No warranty is provided as to the continuity of soil strata between borings Logs represent DENSE 37 62 VERY STIFF 20 - 40 the soil section observed at the bonng location VERY DENSE OVER 62 HARDOVER 40 = Well sandpack on the date of drilling only S-Sampler sank into medium under the weight of = Approximate stabilized NOTE all percentages of lithological the hammer(no blow count) = water level composition presented on the soil boring Well screen P a Sampler was pushed into medium by drilling ng logs are approximate They represent the (no blow count) 4 Approximate first encountered best estimates of a CGI geologist based on NR - No Recovery = water level visual inspection in the field . SOIL BORING LOG C LEARWATER AND Group, Inc. WELL CONSTRUCTION DIAGRAM LEGEND