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� <br /> � <br /> APPENDIX A <br /> � FIELD EXPLORATIONS <br /> GENERAL <br /> � Subsurfacc condilions �cctu cxplorcd at ihc si�c h�� drillinq si� boiing>, dcsi�,m�tcd I2-I thruu�th 13-6. "Ihe <br /> borin� luculions are sho�rn an Il�c Silc Plan, PiEicc 2. lhc borings �vcrc complcicd to dcpths o1 "'I ,: io <br /> 31;: fcei bclow ihc cxisting ground surfacc and�he drilling was complcicd by I loloccnc Drilling tFam .lunc 4 <br /> � w 5, 20U8. 'I'he localions and dcvations of thc caplorations wcrc cstimaicd in thc ficld by iaping Gom <br /> cxisting siic improvcmcnts. <br /> tioils encounlered in Ihe Uurings were visually cl�ssificd in general accordance with the classification sysiem <br /> � described in Pigure A-1. A key to Ihe boring log symbuls is also prescnled in figure A-1. "Ihe I�gs of tlu <br /> borings are presented in I'igures A-2 through A-7. 7'he boring logs arc based on our iu�eipr�tation of thc <br /> licld and laburatory data and indicmc ilic various rypcs uf soils and groundµ�atcr conditions encounicrcd. <br /> � 'llie logs nlso indicme the deplhs at which Ihesc suils or thcir churactcristics changc; althougli. ihe change <br /> may actually be gradual. If the chan�c uccurrcd bchveen samples, it was inter��re�ed. 7'I�c densitics nnted on <br /> the boring logs arc based un the blow count dala ob�ained in the borings. <br /> � Obscrvalions of ground�valcr conditions wcrc inadc during drilling and arc prescnted on thc boring logs. A <br /> pictomcter was iustalled in boring 13-G to a deplh of a6out 10 fceL Groundwater conditions observed during <br /> drilling represent a short tcnn condition aud may or may not bc representative of Ihc long�enn groundu�nter <br /> � conditions al Ihe site. Grointdwa�er conditiuns obscrved during drilling should be considered approcimate. <br /> Borings were compleled using truck-mounted,continuous-(light,hollo�wslem auger drillin�equipmcnt. '1'he <br /> borings were continuously monilored by a gemechnical engineer from our finn who exmnined and classificd <br /> 1 the wils encountered,oblained representative soil samples,obscrved groundwatcr cunditions,and prcpared a <br /> A Actniled log of each boring. <br /> � 'llic soils aiwun�ercd in Ihc borings were sampled at '?'h- or 5-foot vcrlical intcrvals �vith a 2-inch outsidc <br /> diametcr S�llll-I17f1Y:I slnndard pcnctration icst (SPT) sampler witli a standard 140-pound mnohammer in <br /> accordancc with Amcrican SociMy for'I'esting and Malcriafs(AS'I'M)D 1586. <br /> ` 'llic samples wcrc oblaincd by driving thc smnpler 18 inches into the soil wilh a 140-pound �mtoivatic <br /> � hammer free-falling 30 inches. 'llic number of blows required for each 6 inches of penMration w�is recorded. <br /> 'I'he blow count("N-value")of the soil was calculated as the nwnbcr oCblows rcyuircd for thc final 12 inches <br /> � of penctration. 'Ihis resisl�ncc, or N-v:duc, provides a mcasure of the relative deusity of gnnulnr soils and <br /> Ihc rclative consislency of cohesive soils. '1'he N-valuc(blows/foot)shown on the boring logs have not becn <br /> conectcd I'or hammer efficicncy. Wherc very dense soil conditions or large particles precluded driving thc <br /> � f'ull I S-inches, ihe peuetration resistance for the p;irtial penetration was enlered on the logs. The blav cuunts <br /> arr shown �m thc horinr lo�s�d �hc respcclivc s;miplc dcp�hs. <br /> I <br /> � <br /> � <br /> ! <br /> — — --------- ----- — <br /> I FifeNu.5;:t4.r!U;.1<! 14�gt:L! —'--�--��'�----'_' GEOEIIGINEEB� <br /> .hJ��l7.lU0d' <br /> I �V Y <br /> I— <br />