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Planning and Building <br />n <br />UNIFIED SOIL. CLASSIFICATION <br />UNIFIED SOIL CLASSIFICATION AND SYMBOL CHART <br />CORPSE -GRAINED 'l c <br />(more than <br />50% of material is ,anger than. Na 2Y, sieve s:zrz <br />Clear, Gravels (Less than 5% fines; <br />�,! t Well -graded gravels gravel -sand <br />�.•� GW <br />a4 mixtures. little ar no fines <br />GRAVELS <br />More than 50% <br />"� GP Poorly -graded gravels gravel -sand <br />of coarse <br />mixtures., <br />: litta le no fines <br />fraction larger <br />Gravels with fines (Mom Mori 12% *m) <br />than No. 4 <br />QGM <br />sieve size <br />Silty gravels gravei-sandit -smixtures <br />GC Clayeygrave±s gram -sand -day <br />s� mixtiffes <br />Clean Sands (Less than 5`JE fines i <br />SW Weil -graded sanck gravely sands. <br />Me or no fines <br />SANDS <br />�. --- <br />50°% or more <br />Sp POony gradeo sans 3ravetty sands. <br />Of coarse <br />little or no fines <br />fraction smaller <br />cis wiith firms tart 12% fines <br />than No 4 <br />sieve size <br />? SM Sky sands. sand�t miatharss — —� <br />SC Clayey sands sand uay mixtures <br />--� <br />FINE-GRAINED Srft> <br />(50% or more of material is smaller iftars No 2j(,, sieve size <br />inorganic sots and v*-e (trio sanos.. rock <br />MIL flour, silty of clayey fine sands or clayey <br />SILTS <br />silts with slit plasticity i <br />AND <br />kxx&»c days of to* t�,; -nediur. <br />CLAYS <br />Liquid limit <br />CL plasticity, gravelly days. sandy days, <br />less than <br />i <br />silty days, lean days <br />50% <br />-_ <br />Organic silts and organic silty days of <br />CIL <br />low plastidu" <br />Inorganic silts rnicaceous or <br />MH diatomaceous fine sandy or silty soils, <br />SILTS <br />elastic sifts <br />AND <br />CLAYS <br />hanic drays of high Oadolty. tat <br />CH <br />Liquid limit <br />daorgs <br />� <br />50% <br />- <br />or greater <br />,� OH Oryardc days of medium to high <br />'_ plastldty, organic silts <br />IGHLY[:H <br />RGANIC <br />j. PT Post and other highly organic soils <br />SOILS <br />Ysived l <br />FOR PERMIT ISSUAN <br />LABORATORY CLASSIAWWWCRITERIA <br />Date: r <br />Cu J60 greater than 4; CC = D 30 between 1 and 3 <br />GW <br />D , *, Dt 0 x Dr.0 <br />GP <br />Not ;Yt",b ng all gradation; requirements for GW <br />GM <br />Atterberg limits below "A' <br />Erne or Ri. less than 4 <br />1 Above "A" line with P.I. between <br />i 4 and 7 are brrdedine cases <br />GC <br />Afterberg (unfits above "A" I <br />requiring use of dual symbols <br />fine with P.i greater than 7a <br />D60 D30 <br />C ;,neater than 4. C = between 1 and 3 <br />C. - C <br />SW <br />D!0 D10 "D60 <br />Sp <br />Net ir.ee+.ing xV gradation requirements for GW <br />SM <br />Atiertterg iirrsn s below "A" Limits plotting m shaded zone <br />line or P.'. less than 4 1 with P.I between 4 and 7 are <br />Atterberg limits above "A" borderline cases requiring use <br />SC <br />Ina with P.1. greater than 7 of dual symbols <br />Cetermins perc;QriWea o` sand and gravel from grain -size Gurve Depending <br />on percentage or fines (fraction smaller than No. 200 sieve size), <br />ri�arse g�ar3:sd soli.- are deswfled as follows: <br />4 Less than � Coen± ... ................ . .......... . ... GW, GP, SW, SP <br />II More ton 12 percer:c .................................. GM, GC, SM. SC <br />5 to 12 peroent ...... . . ..... . ..... Borderline rases requiring dual symbols <br />PLASTICITY CHART <br />60 <br />n 50 <br />i CH <br />tx 40 A LINE: <br />GZ 30 PI = 0.73(LL-24) <br />r tom. MH&OH <br />20 <br />i= <br />d 10 <br />MLbOL <br />0 10 20 30 40 50 60 70 80 90 100 <br />LIQUID LIMIT (LL) (%) <br />1602 W Brook St Unit 2 Santa Ana Ca 92703 Soil Classification A <br />