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' UNIFIED SOIL CLASSIFICATION SYSTEM -VISUAL CLASSIFICATION OF SOILS (ASTM D-2488) MAJOR GROUP DIVISIONS SYMBOL GROUP NAME DESCRIPTION •G•O•O C+ Well-graded gravel • • e • Well-gradedsli gravels or gravel-Sand O.O �a+Cn•4p W Wellgraded gravel with sand mixtures little or no fines OOOG GRAVEL0'0'0'0'0 Poorly-graded gavel ' 610'010'0 GP Poorly graded gravel with sand Poorly-graded gravels or gravel AND O'O'O'O'O sand mixture little or no Fines GRAVELLY 0'0'0'0'0Silty gravel Silty gravels gravel-sand-silt SOILS 00`000 G M Silty gravel with san.l exurtures ' 0'0`0`0 a Clayey gravel Clayey gravels gravel-sand-day COARSE G C Clayey gravel with sand auxturM GRAINED ffm. SOILS SW Weil-graded sand Well graded sands or gravelly Well-graded sand with gravel sands. Little or no fines SAND $ Poorly-graded sand Poorly graded sands or gravelly Poorly-graded sand with gravel sands little or no Eines AND • • + + + SANDY '```♦`+;+ SM Silty sand Silty sands sand-silt matures ' SOILS + ♦ + + • Silty sand with gravel !!!! !/!! S C Clayey sand Clayey sand with grand Clayey sands sand-day matures +++++++++ Inorganic silts and v fine ++♦♦+♦♦♦♦ Silt Silt with sand Silt with gravelvery +++++++++ sands rock flour silty or SILTS ++++++++• ML Sandy silt Sandy silt with gravel ty Gravelly silt Gravelly silt with sand clayey fine sands or clayey AND silts with slight alasticri CLAYS Lean day Lean clay with sand Lean clay with gravel lrtorgmuc clays of low to medium PIIYE C L Sandy lean day Sandy lean day with gravel plasticity gravelly days sandy Gravelly lean clay Gravelly lean clay with sand clays silty clays lean days GRAINED ELASTIC ...... Elastic Elastic silt Elastic silt with sand Elastic silt with ave Inorganic ' .,..w„� Br garuc silts wcacrous or SOILS Sandy elastic silt Sandy elastic silt with gravel diatamacrous fine sand or silty MH r ty SILTS Gravelly elastic silt Gravely elastic silt with sand soils elastic silts AND Fat clay Fat day with sand Fat day with gravel Sandy fat day Sandy fat day with gravel Inorganic days of high plasticity CLAYS C H Gravelly fat day Gravelly fat clay with sand fat days ' Organic soil,Organic soil with sand Organic soil with gravel Organic silts and organic silt- O L/O H Sandy organic sal,Sandy organic soil with gravel days of low plasticity Gravelly organic soil Gravelly organic soil with sand Organic days of medium to high HIGHLY 11 plasticity ' ORGANIC SOILS P{ Peat Peat and other highly organic soils WELL CONSTRUCTION E%PLANTION SOIL BORING NOTES SANDS &GRAVELS BLOWS/Fr SILTS & CLAYS BLOWS/Fr Blank well casing Blow count represents the number of blows of a 140-lb harrun.r falling 30 inches per blow required VERY LOOSE 0 5 SOFT 0 5 Neat cement or to drive a sampler through the last 12 inches of an LOOSE 5 - 12 FfliD.I S - 10 ' sand slurry seal I&Lric t penetration Bentonite seatMED DENSE 12 - 37 ST1FP t0 - 20 No warranty ts provided as to the mntmiuty of sod strata between bormgs Logs represent DENSE 37 - 62 VERY= 20 - 40 the sail section observed at the boring location VERY DENSE I OVER 62 HARD OVER 40 Well sandpadc on the date of drilling only — S•Sampler sank into medium under the weight of _ the hammer(no blow count) = Approximate stabdued water level Well screen P-Sampler was pushed into medium by drilling ng (no blow count) ,Approximate fust encountered water level NR . No Recovery - CLEARWATER sol soG LOG AINM APPENDIX C ' Group, Inc. WELL CONSTRUCTION DIAGRAM PLATE LEGEND C-1 1