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i UNIFIED SOIL CLASSIFICATION SYSTEM-VISUAL CLASSIFICATION OF SOILS (ASTM D-2488) 1MAJOR GROUP GROUP NAME DESCRIPTION DIVISIONS SYMBOL a0a0a0a0e Well graded gravel a a a + a Weq-graded gravels or gravel-sand aO#flip+Qa GW Well-graded gravel with sand Mures little or no fines ' . .4 GRAVEL 0:0,0'4*0 Poody-graded gravel poorly-graded gravels or gravel 0.0:0:0:0 G P Poorly-graded gravel with sand sand mixture little or no fines AND G0�0.0.0 ' GRAVELLY Q'p'¢'�p Silty gravel Silty gravels gravel-sand-silt SOILS c,o,o,o ° GM Silty gravel with sand rruxtures 0,0`0,0'0 ' Clayey gravel Clayey gravels gravel-sand-clay COARSE G C Clayey gravel with sand rtuxtures GRADYED SOILS SW Well-graded sand Well graded sands or gravelly ' Well-graded sand with gravel sands httle or no fines SAND SP Poorly graded sand Poorly graded sands or gravelly Poorly graded sand with gravel sands little or no fines AND w t SANDY •��*% SMtY Silty sands sand-silt mixtures SOILS * Silty sand with gravel S C Clayey sans Clayey sands sand Clayey sand with gravel clay mixtures fff/ Silt Silt with sand Silt with gravel Inorganic silts and very fine SILTS ML Sandy stkt,Sandy silt with gravel sands rock flour silty or •r��t��v cls fine sands or clayey •��ktitir�� Gravelly silt Gravelly silt with sand Yea' AND silts with sh ht lashn Lean clay Lean clay with sand Lean clay with gravel Inorganic days of low to medium CLAYS FINE C L Sandy lean clay,Sandy lean day with gravel plasticity,gravelly clays sandy Gravelly lean day Gravelly Ilan clay with sand clays silty days lean clays GRAINED �ti�t►t�� Elastic silt Elastic slit with sand Elastic aLlt with ave ELASTIC »��w+�+r $r Inorganic silts nucateous or SOILS ttt�ti�rt� Sand elastic silt,Sand elastic silt with gravel MH Graven elastic silt,Graven elastic silt with sand sails,elastic fine sandy or silty SILTS ��tt�t� Y Y soils,elastic silts AND Fat clay Fat day with sand Fat clay with gravel Sandy fat day Sandy fat clay with gravel Inorgaruc days of high plasticity, CLAYS C H Gravelly fat day Gravelly fat day with sand fat clays Y Organic soil,Orgaruc soil with sand Orgaruc soil with gravel Organic silts and organic silt- ' Sandy organic soil Sandy organic soil with gravel clays of low plasticity G LIO H Gravelly organic soil Gravelly organic sol with sand Organic days of medium to lugh HIGHLY plasticity ORGANIC SOILS r Pt Peat Peat soilsand other tughlyorganic I I II I WELL CONSTRUCTION EXPLANTION SOIL BORING NOTES I SANDS &GRAVELS BLOWS/FI SILTS & CLAYS BLOWS/FT Blank well casing Blow count represents the number of blows of a 'I 14G-lb hammer falling M inches per blow required VERY LOOSE U - 5 SOFT 0 - 5 sari cement seal to drive a sampler through the last 12 niches of an LOOSE 5 _ 12 FIRM 1 5 10 18-mchpenetration. MED DENSE 12 - 37 ST1FF ' Bentonite seal 10 20 of warranty is provided n to the con inuity prose DENSE 37 - 62 VERY= 20 40 of sail strata between banngs Logs represent v the soil section observed at the boring location VERY DENSE OVER 62 HARD OVER 40 Well sandpack on the date of drd1mg only E _ S.Sampler sank into medium under the weight of the hammer(no blow count) I = Approximate stabilized water level I 1 Wel!screen P.Sampler was pushed into medium by'dnlli ng ng = ' ' b (no low taunt I ' I ' k NR l o Recovery ' Approximate first encountered water level II CLEARwATER GROUP, 6 1 ' SOIL BORING LOG I G SAND `I 1125 Atlantic Avenue, Ste 102 1 l l 1 l f I 1 ' ! I 'I APPENDIX Alameda, California 94501 1 lr WELL CONSTRUCTION ItI I I UCTION l ; ' Phone 510-337-8730 LEGEND C I`1 Fax 510-523-0984 ,1 I I I 1 Iht I ,ill �I� 11111 t 1111 11 E VIII I I pp €I,Irr I t II, �I I VI tr 11 IFt�I I `E 4 kI t I t IIr 1 E r 'I I' ill�'If�� I I I 1 FI 111 Vi III VvI 1i I 1 IIV`I [III 1141 1I Alli 111 l I kl 1 1lll 1 Ili I 1 F E I l i nil I I Ir If•1 I! r I I lilt E I rl I f [111 Ell'I'I I Ill`{ II �II 1l 1 1 "''II ll all 111 l 1 I I 1„�6l tl{11 IIhIP �� 11 d .1 I; I Ell III " �lillf 11 Ern 1iI 11'f IIS It �1i t1�1 Ik' i 1 1111111 �'1 i 'I Illi [