11632 EVERGREEN WAY BASE FILE 2018-01-01 MF Import

Propcs�d Rctail Deve!opment J-1443 l 12`�Suect and Hwy.99 Febtuary 26,2004 � Everett,Washington Pege 9 � vaziations in groundwatcr conditions should be expected due to seasona[ vari�Hons, on and off- site land usage,irrigation, stormwatcr infillration,and other fac!ors. Scismic Criteria The City of Everett has adopted the 1997 UniForm Buiiding Codc. According to the Sersmic Zone Map of the United States contained in the 1997 Ur.iform Building Code, the projecc sitc lies within Scismic Zone 3. Based on soil conditions encountered in che borings drilled at the site,the subsurface site condirions are interpreted to correspond to a seisrrtic soil prof le type S�as defined by Table 16-J of the 1997 Unrform Buildrng Ccde. Seil profile type S� applies to an averugc soil profile within the top 100 feet consisdng predomina��tly cf very dense soil cha:acterized by Standard Penetration Test blow counts gteater than 50, a shear wave velocity of �, 1,2C0 to 2,500 feet per second,and an undraincd shear slrength greater than 2,000 psf. � � The site soils aze not considcred to be pronc to liquefaction due to their grain-size distribution and relative density. The polential for seismic relatcd settlement is considercd low. Based on our analyses, foundation bearing capacity �'ail�ae is considered unlikely, and scttlemer.t of grcuter than 1 inch is considered unlikciy during a design-level earlhquake. Results of pH and Resistivity Testine Results of the pH and resistivity testing arc presented in the foll�wing table. � TesY PitBoring Piumber Depth(Fect) pH Res(sHvity(ohm�m) TP-2, S-1 1 5.7 20,000 B-lOB, S-1 2'/z 6.4 11 000 B-20, S-1 2%z 6.0 15,000 The cicctrical resistivity of each sample listed above was measured in the laboratory witb distillcd water added to create a standardized condition of saturation. Resistivities aze at about their lowest value when the soil is sahuated. Electrical resistivities of soils aze a measure of their resistance to the flow of corrosion currenls. Corrosion currents tend to be lower in high resistivity soils. The elcctrical resistivity of the soil varies primarily with its chemical and moisture contents. Typically, the lower the resistivity of native soils,the morc likely that galvanic cua�cnts may develop and incrcase the possibility of corrosion. Based on laboratory test results, resistivity values for thc ncar surCace nafive soils varicd between 11,000 and 20,000 ohm-cm. Soils with resistivity values greater than 10,000 ohm-cm are gencrally associated with soils classified as "mildly corrosive". The pH of the soils is slightly acidic but does not appeaz to be significant in evalualing corrosivity. Therefore, it is our opinion that Type I cement is suitable for this project. With respect to tl�e nced for protection of buried metal utiliGes, we recommend that the design cngineers consult with the manufacturers of specific products in ordcr to deternvne the need for � protection. v i �.,. i J-t4A3,U:2604 i ql