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STANDARD SYMBOLS <br /> Legend Penetration <br /> Sod sample location Sample drive hammer weight- 140 pounds falling 30 inches. <br /> ® <br /> Soil sample collected for laboratory analysis Blows ttquutd to drive sampler 1 foot are undtcateyd on the logs <br /> Well Construction <br /> 0 No soul recovery ® Annular seal <br /> First encountered groundwater level Bentonite seal <br /> IPbtentiomet ric groundwater level Sand pack <br /> ® Disturbed or bag sod sample Well riser section <br /> IS YR 512 Soil color according to Munsell Soil Color Charts ® Well screen section <br /> (1975 Edmon) <br /> UNIFIED SOIL CLASSIFICATION SYSTEM <br /> GROUP <br /> MAJOR DIVISIONS SYMBOLS TYPICAL NAMES <br /> �- ts 1! 55 43 GW Well-graded gravels,gavel-sand mixttttzs.little or no fines <br /> ' U v GP Poorly graded tlrwvcl&gravcl-sand mixtz-,little or no fines <br /> o � <br /> -sand-s9t nuxmm <br /> 8z GM Silty <br /> ? a 3 t6 GC <br /> � •! l-sand�lay mix== <br /> zSW We1l-tom sands.,gravelly sand.little or no fives <br /> y I . V SP pooriy puded weeds,vv ay sands,little or no fines <br /> es <br /> y �u � .rte. , SM S�7ty sands,sand-silt mzxrtaes <br /> 1 1W <br /> V) 3 SC Clayey►sands,sand-clay tmxtium <br /> Inmgamc silt;and very rima sands.tock flour,silty err clayey <br /> MZ' fine saris,err silts.with s <br /> y 1'r = Imclays ays of bar to medium plasticity.gravelly clays, <br /> chit � 3 GLsandy days <br /> lam <br /> tG d 'S Off.. Qrnia sits and onsnuc silty clays of low PlasacuY <br /> Z ; Ittorgsatc sults,mucaceaus or dua=wenn frac sandy err silty <br /> C? g sods.alas=silts <br /> r3 <br /> z i3 ..3 I CH Ittargantc elm of high plssncity,fat clays <br /> = OH C ftsuue clays of radium to high plautcuty.orgarm silts <br /> Pt Pert and other highly oq=w soils <br /> NOTES: <br /> 1. Botmdaty Cla icataon: Soto possterstng characterivacs of two gimps are designated by cornbtaanons of group symbols. For <br /> example,GW.A=w alpaded gravel-sand maattare with clay birder. <br /> I All sieve sizes on hits chart are U.S.standard. <br /> 3. The tams"salt"and"clay"are used respectively to distinguish materials exhibiting lower plasucuY from dlnose with higher <br /> Piz►• <br /> 4 Fou a complete de=ptton of the Utufied Soil Classification System,see "Technical Memorandum No.3-357,"prepay for <br /> Office.Chief of Engineers,by Waterways Equipment Station,Vicksburg.Mtssasstppt,March 1953. <br />