3313 SMITH AVE 2018-01-01 MF Import

� March 30,2009 � ' HWA Project Nu, 2009-030-21 these explo�ations we selected two(2)ef the most releva�it CPT explorations and two(2) borings with rcicvant laboratory tcst data,to evuluatc soil and ground watcr conditions for the subject projec:t. These explorations werc MPA's CPT soundings CPT-1 and CPT-2; nnd IiWA borings BH-2,nnd BII-12. The epproximate locations ofthese explorntions are shown on Sitc and L'xploration I'lnn,Figurc 2. Logs of thcsc CPT's and borings arc presented in Appendix A of th'ss report. Detailed infonnation conccrning the drilling and sampling mcA�ods can bc found in thc above rcf'crcnccd reports. ,•. � �> 2.2 CEOLOCY � ' Gcologic infornintion for the project orcu wus obtained from thc Geologrc Map ofthe � Lvere�t 7.5-Mirnde Qundrn�rgle, Snohornisla Co�mry, Wnshr�rglon (Minard, 1985). According to Minnrd,ncur-surfucc deposits at the project sitc consist of Quatcrnary glucial advancc outwash deposits. Advnncc outwash is described by Minard as�eing primarily composed of sand with some pebbles,cobbles,and locally silly arcas. Advance outwush i.�mostly gray and contuins arcus thal have bccn oxidizcd to shadcs of brown. Thc ndvancc outwnsh cnn extend to 200 Fcct thick in some flrcns. 2.3 SURSURRACF.CONDITfONS '\�, �� Our iuterpretaUons nf subsurface conditioii's nre based on a review of available geologic nnd geotechnica! information for thc prajcct�sitc. In gerie'ral, the Everett transit stution corridor is undcrlain by fl rclativcly uni£onn sc`qucncc of undocumcntcd fill,nativc clny, and glacially consolidated adv�ncc outwash saiids;' Undueunicntcd Fill—I Iighly variable fill materi�l was encountered in the niujority of tliu existiug cxplorutions in thc viciniry of tl�c Blt'C sitc. '1'hcsc 'exploratians iudicnle that the fill material ruiges from 4.5 to 6 feet thick. ' �xplerations indicate thc till gcuernlly consists of loose to medium dense silty sands ivitlt thc occasiqna] Inycr of silt nnd c(ny, llcbris such as asphalt,wood chips,and concrete'H�crc repoited in severll of the explorations, Dnsed on our reccnt couvctsatio�is with Granitc Construction,thc Sound'Crr,nsit 1'cdcstrian 13ridgu Conu'aclor,«e understand that tienching ope�mtions througiioul the Pcoposed Blt'I'sitc encountcrcd abundant woody dcbris within the fill. Native Clnv—Mcdium stiff io stiff Ic:in cluy is typicnlly rcported bclow the fill in the viciuity of the 13I2T s!P. Some nrcas of highly plaslic(fnt)cluys were also repoded. ]nterbedcd layers of silt m•e reported to exist within this deposit. Based on oonc penedvmeter test(CP'I)and lubaratury tesls ii uppcars t�iut the native cluy is nonnally consolidnted. This compressible layer is up to 25 feet thick. zoov.o;o-z� ureneoA 2 ��wnceosc��mcrstr+c �