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i <br /> APPENDIX A <br /> FIEI.D EXPLORATION AND LABORATORY TESTING <br /> EXPLORATIQN PROGRAM <br /> Subsurfacc soil nnd groundwatcr conditions wcrc cvaluatcd by rcvicwing cxisting subsurface soil <br /> informntion, drilling thrce borings, and cxcavating four tesl pits. Thc borings were completed to depths <br /> of 1610 25'/. fcet bclow thc cxisting ground surface. 77�e icst pits werc excavated to a dcpth of four to ten <br /> fccl bclow cxisting sitc gradc. Thc cxploration localions wcrc ficld locatcd by taping and pacing from <br /> cxisting sitc fcatures. <br /> i 'I'hc explorations werc continuously monitorcd by a gcotcchnical cnginecr fmm our firm who examincd <br /> and classificd the soils enwuntcred, obtaincd rcpresentntivc soil samplcs, obscrvcd gmundwater <br /> conditions, and prcparcd a dctailcd log of cach exploration. Soils were visually classificd in gcncral <br /> I accordancc with ASTM D 24R8-90, which is dcscribcd in �igurc A-1. M explanation of our boring log <br /> symbols is ulso shown in Pigurc A-l. <br /> I Thc samples collected in thc borings were obtuincd using a standard pcnctration tes� (SPT)samplcr driven <br /> I iNo the soil with a 140-pound hnmmer frcafnlling 30 inches. The numbcr o(blows requircd to drive the <br /> cnmplcr the last 12 inches or other indicated distances are rccorded on the boring log. Diswrbed grab <br /> � samplcs werc ohtained in ihe test pits. The logs of the cxplorations are pmsented in Figurcs M2 through <br /> j A-8. l'he cxploration logs arc bascd on our inlcrpretation of Ihe ficld and laboratory data and indicate the <br /> various typcs of SOIIS cncoumcrcd. T'hcy also indicatc the deplhs ut which thcsc soils or their <br /> � choractcristics changc; although,the changc might actually bc gradual. <br /> LABORATORY TESTING <br /> All soil samples werc brought to our laboratory for funhcr examination. Sciccted samples werc tcsted to <br /> dctcrniine thcir moisturc contcN and grain sizc chatactcristics. Thc i:sults of the moisture content Icsts <br /> are prcscnled on Ihc logs. The resulls of Ihc grain size nnalyses nrc provided in figurc A-9. <br /> Onc CI3R (Calilbrnia l3caring Rntio) tcst was performcd on a Inrgc bulk samplc collcctcd bclow thc <br /> pavcmcnt scc�ion in bonng f3-2. 7'hc C13R tcst was perfortned in gcncral accordancc with thc <br /> AS'1'M I)1RR3-87 tcxt prucedure. 'I'hc maximum dry density and optimum moislure content of the I:ulk <br /> samplc was dctcrniincd in gcncral eccordancc with AS7'M D I557. The CUR samplc was rcmoldcs ro <br /> between R7 nnd 9R percem of the m�ximum dry densiry al approximatcly the optimum water conlent as <br /> dcir,rniincd by AS1 M D 1557. 'I'hc samplcs wcrc ;oakcd for a minimum of 24 hours prior to tcsting. <br /> 1'hc results of dic CRR Icsl is prescnlcd bclow. <br /> Sample Maxlmum Dry Optlmum Molsturo Relativs Compacllon CBR <br /> Locatlon Denelty(pc� Content(Perunt) �Percenl) <br /> 87 3 <br /> B�2 134 8.4 9B 58 <br /> Fil��A'�� :ov.cnlv�:+ Pagt A-I GEOENGINEE�S� <br /> Ve��:. !ixw <br />