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GENERAL NOTES <br /> DRILLING&SAMPLING SYMBOLS: <br /> SS: Spirt Spoon-1-'1i I.D.,2'O.D.,unless otherwise noted HS: Hollow Stem Auger <br /> ST. Thin-Walled Tube-2 O.D.,3'O.D.,unless otherwise noted PA. Power Auger(Solid Stem) <br /> RS. Ring Sampier-2-42'I.D.,3'O.D.,unless otherwise noted HA: Hand Auger <br /> DB. Diamond Bit Coring-4',N.8 RB. Rock Bit <br /> BS: Buk Sample or Auger Sample WB Wash Boring or Mud Rotary <br /> The number of blows required to advance a standard 24nch O.D. sot t-spoon sampler (SS) the last 12 inches of the total 184nch <br /> penetration wwth a'40-pound hammer falling 30 Inches Is considered the*Standard Penetmtlon'or TI-value' <br /> WATER LEVEL MEASUREMENT SYMBOLS: <br /> WL: Water Level WS. While Sampling BCR: Before Casing Removal <br /> WCI: Wet Cave In WO: While Driling ACR: Alter Casing Removal <br /> DCI: Dry Cave in AS. After Boring NIE: Not Enoountered <br /> Water levels indicated on the boring logs are the levels measured in the borings at the times indicated. Groundwater levels at other <br /> times and other locations across the site could vary. In pervious soils,the indicated levels may reflect the location of groundwater. In low <br /> permeability soils,the accurate delerminabon of Wioundwaller levels may not be possible with only short-term observations. <br /> DESCRIPTIVE SOIL CLASSIFICATION:Soil classification is based on the Unified Sal Classfocatlon System. Coarse Grained Soils <br /> have more than 50%of Mir dry weight retained on a#200 sieve;their principal dosrrlptors are:boulders,cobbles,gravel or sand. Fine <br /> Grained Soils have less then 50%of their dry weight retained on a#200 sleve;they are principally described as days if they are plastic, <br /> and silts If they are slightly plastic or non-plastic. Major constituents may be added as modifiers and minor constituents may be added <br /> acGxdirig to the relative proportions based on grain size. In addition to gradation,coarse-grained sale are dented on the bans of thew <br /> "aoe relative density and fine-grained soils on the basis of their consistency. <br /> CONSISTENCY OF FINE-GRAINED SOILS RELATIVE DENSITY OF COARSE-GRAINED SOILS <br /> Unconfined Standard Penetration Standard Penetration <br /> Compressive or N-vaius(SS) Consistency or N-value(SS) Relative Density <br /> Strenath,Ou.cast BlowslR. Blowa/Ft. <br /> <500 0.1 Very Soft 0-3 Very Loose <br /> 500-1,000 2-4 Soft 4-9 Loose <br /> 1,000-2.000 4-8 Medium Stiff 10-29 Medium Dense <br /> 2.000--4,Ot)D 8-15 Stiff 30-50 Dense <br /> 4.000 -8.000 15-30 Very Stiff >50 Very Dense <br /> 8,000+ >30 Hard <br /> RELATIVE PROPORTIONS OF SAND AND GRAVEL GRAIN SIZE TERMINOLOGY <br /> Descriptive Term(s) Percent of Mailer Component Particle Size <br /> of other constituents Dry Welaht of Sample <br /> Trace <15 Boulders Over 12 in.(300mm) <br /> With 15-29 Cobbles 12 In.to 3 in.(300mm to 75mrn) <br /> Modifier a 30 Gravel 3 in.to#4 sieve(75mm to 4.75mm) <br /> Sand #4 to#200 sieve(4.75 to 0.075mrn) <br /> Sill or Clay Passing#200 Sieve(0.0T51nr-I <br /> RELATIVE PROPORTIONS OF FINES PLASTICITY DESCRIPTION <br /> Descriptive Terms) Percent of Term Plasticity <br /> of other constituents Dry Weloht jr� <br /> Trace <5 Nwrolaslx, 0 <br /> With 5-12 Low 1-10 <br /> Modifier >12 Medum 11-30 <br /> High >30 <br />