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GENERAL NOTES <br />1950 Chicago Building Code Soil Classifications aro Usod Except Whero Notod <br />DRILLING & SAMPLING SYMBOLS <br />I Split-Spoon— 1 */$** I. Dm 2” O. D., oxcopt whoro notod <br />I Sholby Tubo-2" O.D., oxcopt whero nctoJ <br />I Power Auger Sample <br />I Diamond Bit-NXi BX: AXi <br />I Carboloy Bit — NXi BXi AX> <br />I Osterberg Sampler —3" Shaiby Tube <br />t Houtel Sampler <br />WS t Wash Sample <br />FT I Fish Tail <br />RB I Rock Bit <br />WOi Wash Out <br />SS <br />ST <br />PA <br />DB <br />CB <br />OS <br />HS <br />Standard *’N'* Penetratiem Blows per foot of a 140 pound hammer failing 30 inches <br />on a 2 inch OD split spoon« e xcept where noted. <br />WATER LEVEL MEASUREMENT SYMBOLS <br />WL I Water Level <br />WCII Wet Cave In <br />DCI t Dry Cave In <br />WS t While Sampling <br />WD I While Drilling <br />BCR I Before Casing Removal <br />ACR I After Casing Removal <br />AB I After Boring <br />Water levels indicated on the boring logs are the levels measured in the boring at the times <br />indicated. In pervious soils, the indicated elevations are considered reliable ground water <br />levels. In impervious soils, the accurate determination of ground water elevations is not <br />possible in even several days observation, and additional evidence on ground water eleva­ <br />tions must be sought. <br />CLASSIFICATION <br />COHESIONLESS SOILS COHESIVE SOILS <br />"Troce" <br />"Trace to some' <br />"Some" <br />"And" <br />Loose <br />Medium Dense <br />Dense <br />Very Dense <br />1% to 10% <br />10% to 20% <br />20V»to35% <br />35% to 50% <br />0 to 9 Blows <br />10 to 29 Blows <br />30 to 59 Blows <br />> 60 Blows <br />equivolent <br />If clay content is sufficient so that clay dominates <br />soil properties, then cloy becomes the principle <br />noun with the other major soil constituent as <br />modifier; i.e.. silty clay. Other minor soil con­ <br />stituents may be added according to clossifica- <br />tion breakdown for cohesionless soils; Le.. silty <br />clay, trace to some sand, trace gravel. <br />Soft <br />Stiff <br />Tough <br />Very tough <br />Hard <br />0.00 — 0.59 tons/ft- <br />0.60 0.99 tons/ft- <br />1.00 — 1.99 tons/ft- <br />2.00 — 3.99 tons/ft= <br />> 4.00 tons/ft> <br />SOIL 6 MATERIALS ENGINEERS <br />INC. <br />7900 77th Avenue North <br />Minneapolis, Minnesota