319 76TH PL SW 2016-01-01 MF Import

SERS Public Safet , 1-1-1 Communication Tourer SI Report No 704-05224-1 December 26, 2000 Page 4 4.2 Geology and Soils The subject site lies in the Puget Sound Basin, between Puget Sound and the Cascade Range. According to the Soil Survey of Snohomish County Area, Washington, the area Soils are made up of the Alderwood-Everett Soil Unit. This soil is generally moderately to very deep, moderately well to somewhat excessively drained and occurring on glacial till plains, terraces and outwash plains that may be nearly level to very steep. The predominant soil of this soil unit is gravelly sandy loam underlain by hardpan at relatively shallow depths. The general soil profile was as follows: FILL—Apparent fill was encountered in the upper 15 feet of the boring. The apparent fill consisted of brown silty sand with gravel. The soil was very loose to medium dense in density. This fill material appears to have been placed to construct the roadway and may not be encountered in the area of the proposed construction. SILTY SAND WITH GRAVEL — Gray silty sand with gravel was encountered beneath the fill soil and extended to the maximum depth of the boring (26-1/2 feet). This soil unit was very dense. Moisture contents of the samples tested ranged from 6 to 10 percent. The soil profile described above is generalized to highlight the major subsurface stratification features and material characteristics. The boring log included in the Appendix should be reviewed for specific information at the individual exploration location. This record includes soil descriptions, stratifications, locations of the samples and laboratory test data. The stratifications shown on the log represents the conditions only at the actual exploration location. Variations may occur and should be expected between exploration locations The stratifications represent the approximate boundary between subsurface materials and the actual transition may be gradual. The samples that were not altered by laboratory testing will be retained for 60 days from the date of this report and then will be discarded. 4.3 Groundwater Groundwater was encountered at a depth of 21-112 feel below existing grade at the time of drilling. 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 The site lies within Seismic Zone 3 with a seismic zone factor of 0 3 as classified by the Uniform Building Code, 1997 edition. Based on the local geology and the soil conditions encountered, ��