1135 CRAFTSMAN WAY Geotech Report 2018-01-02 MF Import

r . ' Hart Crowser J-3446-01 ► Fapect ]ess than 1 to 1'h inches of setflement at footings. ► Design slabs with a modulus of subgrade reaction of 200 pounds per cubic inch. ► Provide 4 inches of capillary break material beneath slabs. ► Desi� pavement sections using a CSR value of 15 percent SUBSURFACE CONDTI'IONS Our understanding of the subsurface conditions is based on five deep borings, two shallow borina,s and laboratory testing of the samples (see Figure 2). Subsurface soil conditions interpreted from explorations accomplished at the site and soIl properties inferred from the 5eid and laboratory tesu formed the b:uis for developing the conclusions and recommendations contained wzthin this report. The nature and extent of variatians between the explorations may not become evident until construction. If variations then appear evident, it w11 be necessary to re-evaluate che recommendations of this report Deta7s of the conditions observed at the boring locations aze shown on the logs included in Appendix A ar�d should be referred to far specific information. SoiLs - �fedium Derue Granular Materia! aver Glacia! SoiLs Figure 3 is a generalized subs•.uface profle running north/south through the proposed new warehouse and covered storage bLuldings. 'I'he upper 20 to 30 feet of soils consist of ]oose to medium dense s�7ty sand and medium stiff to stiff sandy s�7t both with shell and wood fragmenu. We interpret this upper 20 to 30 feet of material as dredged hydraulic 5ll. Older maps and aerial photogaphs of the area indicate that most, if not all, of the sice was once a part of Port Gardner Bay. We interpret the wood fragments to be the result of the lumber mi7ling operations prior to filling Port Gardner Bay. The shell fra�ents, _ cspecially those located in soils above the sea ]evei, are further evidence of past filling activities using dredged so�s. � Pag �4