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RDC EVERETT TRANSFER FACILITY Everett,Washington <br /> on the north end of the site is covered with a thin layer of gravel, which limited the visual I <br /> condition survey in this area. Based on observations of the gravel over the asphalt pavement, <br /> we anticipate that the condition of the pavement in this area is in poor condition with areas I <br /> showing signs of settlement and potholes. <br /> • West of Track 1: The majority of the pavement west of Track 1 is covered with a thin layer of <br /> gravel, which limited the visual condition survey in this area. Based on observations of the I <br /> gravel over the asphalt pavement, we anticipate that the condition of the pavement in this area <br /> is in poor condition with areas showing signs of settlement and potholes. <br /> Geology <br /> Our review of the U.S. Geological Survey map, Geologic Map of the Marysville Snohomish County, <br /> Washington by James P. Minard indicates that surficial soils at the site consist primarily of younger <br /> alluvial and estuarine deposits. <br /> The younger alluvial and estuarine deposits typically consist of stream-laid stratified sediment I <br /> largely consisting of silt and clay with considerable amounts of organic matter. Younger alluvial <br /> and estuarine deposits also contain sand and local peat deposits. We observed the younger <br /> alluvial and estuarine deposits immediately below a thin layer of fill in each of the borings <br /> completed for this project. <br /> Subsurface Conditions <br /> Based on the explorations completed at the site, the subsurface conditions generally consist of a <br /> fill overlying younger alluvial and estuarine deposits. I <br /> At the surface, we observed either gravel, asphalt, or concrete supported on about 3 to 71/2 feet of <br /> fill. The fill generally consists of medium dense to dense sand with gravel and variable silt content. I <br /> The fill overlays very soft to soft silt/organic silt with variable amount of sand and occasional peat <br /> lenses. Borings B-2, B-4, B-6 and B-8 penetrated through the very soft to soft alluvial silt deposits I <br /> and were terminated in loose granular soils consisting of silty sand. The remaining borings (B-1, <br /> B-3, B-5, and B-7) were terminated in the very soft to soft alluvial silt deposits. A summary of the <br /> observed soil conditions is presented in Table 1. <br /> II <br /> TABLE 1. SUMMARY OBSERVED SOIL CONDITIONS <br /> Approximate Elevation(feet) <br /> Boring Surface Condition Ground Bottom of Bottom of Very Soft to <br /> Surface Fill Soft Silt/Organic Silt Bottom of Boring <br /> B-1 3 inches Gravel 10 7 - -11/2 <br /> B-2 6 inches Asphalt 10 61/2 -11/2 -31 <br /> B-3 14 inches Concrete 14 61/2 - -21/2 <br /> B-4 7 inches Asphalt 11 6 -31/2 -51/2 <br /> B-5 6 inches Asphalt 11 6 - -1/2 <br /> B-6 8 inches Asphalt 11 71/2 -31/2 -51/2 I <br /> B-7 6 inches Asphalt 11 6 - -3 <br /> B-8 6 inches Asphalt 11 6 -31/2 -51/2 <br /> I <br /> GEOENGINEERS� June 18.2013 Page 3 <br /> File No.4322-002-00 <br />