500 LAUREL DR 2016-01-01 MF Import

Geotechnical Engineering Study Page 7.6 00-2267 Three Story Addition - 500 Laurel Street, Everett January 31, 2001 Based on the er.ploratory data it is also our professional opinion that the soil beneath this site generally fall into what the UBC describes as a"stiff soil" profile. This is a material where the Standard Penetration Test N-values typically range betwees� 15 and 50 per foot. Thus, according to Table 16-J of the 1997 UBC the �ite is considered to have the foll�wing profile designation: ■ 1997 UBC "stiff' soil profile = S� According to Tables 16-Q and 16-R the following seismic design coefficients should also be used: e 1997 UBC Seismic coefficient Ce = 0.33 ■ 1997 UBC Seismic coefficient C� = 0.45 �iquefaction Based on the observed soil conditions, given the generally increasing density observed with depth, the small cohesive clay content of the bulk of the in-situ soils, and the lack of an established shallow water level ttiat might be capable of surging and saturating the shallow soi�, these soil do not ap�ear to us to be susceptible to, or at any significant degree of risk of, liquefaction during an earthquake. In our opinion the risk of liquefaction, and liquefaction related settlement, may be considered very low to negligible and does not in our professional opinion pose a threat to the construction process or the completed :�tructure. Slone Stability Generai: As part af our work on this project we also evaluated the g�nsral stability of the sites' wEstern bluff sl�,�e. From the subsurface data acquired from ourexploratory boring and data review, ourvisual axamination ofthe seils exposed across the f2ce of the site slope and on the surrounding properties, and our geological review, it is believed likely that the bulk of the materials beneatn the site ��