4003 NASSAU PL 2016-01-01 MF Import

� � • � , Geotechnical Engineering Report Kvemmo Single-Famil�• Residence � 4003 Nassau Place, Everett September 17, 2002 NGA FileNo.356102 Page 3 ' � were covered with grass. /� ' We measured two cross-sections through the site based on field measurements using a hand-held I clinometer and a 200.foot tape measure. One of these cross-sections, Cross �ections A-A' is presented as Figure 3. We m�asured slope inclinations as 28 degees. The difference in elevation across the site from Nassau Place down to the east property line is about 35 feet. Geology ( The geologic units for this area arz mapped on the Geologc Map of the Everett 7.5 — Minute Ouadranale. Snohomish Counri. Washin¢ton, by James P. Minard, 1985. The project site is mapped as being I� underlain by advance outwash. Advance outwash in this area generally consisu of well-stratified sand with pebbles, and cobbles, and varying amounts of silt. The native materials encountercd in our I' explorations generally consisted of a thin layer of outwash underlain by transitional beds. Transitional beds consist of clay, silt, and very fine to fine sand. The surficial soils encountered in the explorations � consisted of undocumented fill. Ezplorations IWe explored the subsurface conditions withiu the site on September 6, 2002 by drilling 3 borings, each to a depth of 31.5 feet below die existing gound surface, using a track-mounted drill rig equipped with a 4- � inch diameter hollow-stem auger. Samples were collected using the Standard Penetration Test (SPT) method. The SPT consists of driving a 2-inch-ouuide-diameter sampler usieg a 140-pound hammer �� falling 30 inches. The standard method is to drive the sampler 18 inches and record the number of blows for each 6 inches of penetration. The blow counts for the last 12 inches is considered the penetration � resistance and is reported on the boring logs. If the number of blows for any 6-inch increment reaches 50, the sample is not driven further. � The explorations were designated as B-1, B-2, and B-3 and the approximate locations of the explorations are shown on the Site Plan in Figure 2. An NGA geologist was present during the explorations, enamined ' the soils and geologic conditions encountered, obtained samples of ttie different soil types, and maintained logs of the explorations. The soils were visually classified in generel accordance with the � Unified Soil Classification System, presented as Figure 4. Boring logs are shown in Figurcs 5 through 7. We present a brief summary of the subsurface conditions in the following paragraphs. For a more NELSON GEOTECHNlCAL ASSOCIATES, INC. y��