3702 TULALIP AVE 2016-01-01 MF Import

� SERS Public Safeh �-1-1 Communication Tower SI Report No. 704-05224-5 December23, 2000 Page 4 The general soil profile was as follows: FILL— Firm sand fill was encountered in the upper 4 inches of boring B-1. TOPSOIL—Two to three inches of brown silty clay to silty sand topsoil was encountered at the surface of borings B-2 and B-3. SILTY LEAN CLAY— Light brown to blue-gray silty lean clay was encountered in ail three borings underlying the surficial topsoil or fill. The silty lean clay soii extended to the maximum depths of borings B-1 and B-2, and to a depth of 20 feet below grade in boring B3. This soil unit was soft to very hard. Moisture contents of the samples tested ranged irom 12 to 28 percent. COARSE SAND — Light brown, very dense coarse sand was encountered in boring B-3 at a depth of 20 feet below grade and extended to the maximum depth explored (26-1/2 feet). The soil profile described above is generalized to highlight the major subsurface stratification features and material characteristics. The boring logs included in the Appendix should be reviewed for specifc information at individual exploration locations. These records include soil descriptions, stralifications, locations of the samples and laboratory test data. The stratifications shown on the logs represent lhe conditions only at the actual exploration locations. Variations may occur and should be expected between exploralion locations. The stratifications represent the approximate boundary between subsurface materials and the actual transition may be graduai. The samples that were not altered by laboratory testing will be retained fur 60 days from the date of this report and then will be discarded. 4.3 Groundwater Grour�dwaterw2s encountered in borings B-2 and B-3 at depths of 21-112 and 14 feet, respectively, below existing grade at the time of drilling. Groundwater was not encountered in boring B-1. We anticipate that the groundwater table may rise during months of peak runoff. Variations in groundwater levels should be expected seasonally, annually, and from location to location. We recommend the Contractor determine the actual groundwater levels at the site at the time of the construction activities. 4.4 Seismic Considerations l�he site lies within Seismic Zone 3 wilh a seismic zone factor of 0.3 as classified by the Uniform Buildir.g Code, 1997 edition. Based on the local geology and the soil conditions encountered, for structural design purposes we recommend a soil profile at the site of S�when considering