2001 Geotechnical Evaluation Report

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• IJ1G;JVI ?OILS Vii 1111 IIINS IV111.0&✓ (11° Standard D 2487 - 93 Particle Size Identification Classification of Soils for Engineering Purposes (Unified Soil Classification System) Boulders over 12" Cobbles 3"to 12" Gravel Coarse 3/4"to 3" Criteria for Assigning Group Symbols and It SoilClassification• Fine No. 4 to 3/4" Group Names Using Laboratory tests' I Group Sand Symbol Group Name>_ Coarse No. 4 to No. 10 Gravels Clean Gravels C >4 and 1<C <3` g No. 10 to No. 40 � C. GW Wes-graded rave' Medium y a More mm an 50%of Less an 5%fines` C <4 ane/or 1>C.>3' GP Poorly graded grave' Fine No. 40 to No. 200 I: a > ..swat . coarse Silt No. 200 to .005 mm o - d retained on Gravels with Fines Fines assay as ML a MH GM Silty travel.'" ze ;a a a N m12%No.4 sieve More an fines` Fines classily as Cl or CH GC Clayey graver" Clay less than .005 mm ci 3 o Sands Clean Sands I C,>6 and 1<C.<3• SW Well-graded sand• Z SO%or more of Less than 5%mss' C <6 and/or 1>C,>1' SP Peony grades sane' Relative Density of C.1 c coarse fraction Passes Sands with Fines Fates classify as Mt or MH -i SM SiW sane"''' Cohesionless Soils No.4 sieve More than 12%Ones' Fines tdassdy as Cl.or CH (SC Clayey sand•" P1>7 and mots on or aoove'A'line. CL lean clay Lir. very Loose 0 to 4 BPF f Silts and Clays2 inorganic I loose 5 to 10 BPF Z-0 PI<4 or[Nott below'A"line•• ML Sill''" O rot N �l burdlimd I �� medium dense 11 to 30 BPF e e^i lass lean SO organic Cleoid limo•oven fined <0.75 OL Organic clay dense c a S I 1 Liquid tuna.nw driers orgasm as 31 to SO BPF B• g very dense over 50 BPF - c I PI plots on or above"A'lute CH Fat ciav-"' a 'o Z 1 Silts and Clays inorganic ^ PI pael pats botnr'A"line MH Elastic sra Liquid lime Consistency of Cohesive Soils '`s 50 or more I Liquid lima•oven dried <0.75 OH Organic clay'"'a organic Licata limn-not anew Organic sw`'"' very soft 0 to 1 BPF HiohN Organic Soils IPrimanly organic matter.clam in color.and arcane door I PT 'Peat soft 2 to 3 BPF > eased on Me material passing me 3-inor t75nenl some. rather soft 4 to 5 BPF b. it nerd sannore contained cowmen or mtades,or born.300-.nth comes or powders_or mm.-to gram name. medium 6 to 8 BPF Graves Mem 5 to 12%runes require mai symport: GW-GM we*oraded grave with sirs rather stiff 9 to 12 BPF Gw.GC wee-graders gave mien clay stiff 13 to 16 BPF GP-GM peony grease gave wan sae GP-GC peony,graders graee„ewn day very stiff 17 to 30 SPF ,l. Santo yap,5 to 12%fines rectums ares sweats: hard sw-sM wedQaaed sena Mem sit over 30 SPF SW-SC weraded sand war day SP-SM peony graced dared wenee s . Drilling Notes SP.SC dowry graded sand Mem may <. C,-0,./13. C.-(11,e Standard penetration test borings were advanced by o...0„ 3 1/4-or 6 1/4" 10 hollow-stern augers unless noted I. if sod cancan>15%sane.aaa"wen sand-to aouo name. I. u ones crassly as a ML use stmt synod GGG a or 5C-3M. otherwise. Jetting water was used to clean out auger prior to R e fines are waist add"vino organic fines'to grow name. sampling only where indicated on logs. Standard penetration ,. It sod conams>15%graver.add'war grater toqeorso name, test borings are desionated by the prefix -Si"(Split Tube). I. if Aaeoerg lima pmt in named area.sdi is a Ct-ML stay tray. t. It sad comatrts 15 co 29%pas No.200.an:'Mee sand"or-Mee grave.'..ncrever is oreaomnam. Power auger borings were advanced by 4" or 6"diameter. d > i. It socontains 30%pea No.200.preaonrrreeny sena.add'sanely-to goon name. m. Ir soil contains>30%pros No.200.prearnunarety graver.and"gravely-to gado name. COntinuous.f ioht. solid-stern augers. Soil classifications anC s. a>4 aro prod on or armee-A-sur. strata depths were inferred from disturbed samcies augered tc e Pt<4 or aces avow"A line. the surface and are. therefore. somewhat approximate. °' °I prom on o.amnia A Lie. Power auger bonnos are designated by the prefix "B". u. Pi plots brow'A'line. fid Hand auger borings were advanced manually with a 1 1/2" Far dasufisadoe of fine—grained ,J� diameter auger and were limited to the depth from which tr.e soda dna fine-grained freeman d /I auger could be manually withdrawn. Hand auger borings are 50.. rears•soils. indicated by the prefix -H" Fo.neon a"A";fie. C Menrt.r at Pi -25.5. 'J/ OSA ,t\°- Sampling: All samples were taken with the standard 2"CC x 40—men°'-d.r3na2ot ,/ split-tube sampler. except where noted. TIN ir.c;cafes thin- s 0, rm,eO d.�_ Chelm / cQ, wailed (undisturbed) tube sample. dance.atu.:atoA"; / 30—men'"-O9a181 BPF: Numbers indicate blows per foot retorted in stanCarc >' penetration test. also known as N" value. The sampler Was / se! 6•' into undisturbed soil below the hcitow-star..auger 4 30_ d• Driving resistances were then counted for second 3nc!arc 1 G%. MH ar OH I increments and added to get BPF. `F/here they :'reared C' I I significantly. they are reported in the following torr::. 2: .2 'c t0" /t I I the second Ana lhlra 5" increments s ML or CIL •2.JeC::Ve". 0 ) II WH: WH indicates the sampler ce^e:rel:ed so ,;rider .ve.c-. 0 10 16 ZD 30 40 50 50 TO 30 10 :co t0 of hammer and roes alone: anvtr.c not require= Liquid Limit (LL) WR: WR indicates the sampler penetrated sed .inder we:c_r: of rods alone: hammer we.gnt ane cr ivrrg not 'e_uued Laboratory Tests Note: All tests were run in general accoraar.ce ::rth DD Dry density, pcf OC Organic content. 95 Aopucaole ASTM standares. \ND- Wet density. pct S Percent of saturation. :5 MC Natural moisture content. o SG Specific gravity LI Liquid limit. '.S C Conesion. psi B R U N' F! Plastic limit. % 0 Angie of internal friction ?I Plasticity index. 'S du Unconfined compressive_:renatn, psi I NTE E RT E C F=00 casstnd 200 sieve op Pocxet cenetrometer etrent^t. sr Fe 1