9001 AIRPORT RD Geotech Report 2018-01-02 MF Import

i I Su6surface Faploration. Geofogic Hawld � Pre(iminary Geotechnica(Engineering Report S)w-/tk Ski�Ls Center Addition Project and Site Condinans Everen, Warhington -_— i ' 2.0 PROJECT AND SI'TE DESCRll'TION I The subject site consists of the existing Sno-Isle Skills Center campus located at 9001 Airport Way in Everett Washington. The site is relatively flat with the main buildings located within I the central and southern portions of the property, with pulcing lou and vehicle access azeas generally being along the northern portion of the property. ' 7'he Mukilteo 5chool District is coasidering additions and renovations to the existing campus that will affect two of the buildings. An approximately 7,050-squaze-foot addition is planned [o Building l, and an approximately 12,000-squaze-foot addition/uew building is planned to i Building 3. The addition to Building 3 will requ've the removal of one building (Building 4) and two portable classrooms (Buildings 5 and 6). The �sphalt parlcivS lot will largely remain the same, but will feature new pazking azeas and pazking stall realignment. 3.0 SUBSURFACE EXPLORATION . Our field study included drilling six exploration borings at the site on May 14, 2008• The various types of sediments, as we11 as the depths where the characteris e dix �Th�depths changed, aze indicated on the exploration logs pr Iseen�� datiopnai vuiations between indicated on the logs where condiaons changed maY P � sediment rypes. If changes occurred between sample intervals in our exploration borings, theY were interpreted. Our explorations were approximatety located in the field by measuring from imown site feamres depicted on the previously referenced "Site and Exploration Plan." IThe conclusions and recommendadons presented in th�s report aze based on the exploration borings completed for this siudy and a review of existing geologic data for tt�e azea. The I number, locations, and depths of the explorations were completed within site, budgetary, and access conscraints. Because of the nature of exploratory work below ground, exuapolation ot � subsurface conditions between field explorations is nece.�sazY• It should be noted that differing � subsurface conditions may sometimes be present due to the random nature of deposition and the alteration of topography by past grading andlor filling. The nature and extent of any � variations between the field expiorations may not become fully evideT�c ��v�ua e c specific ' vaziaaons aze observed at that time, it may be necessary recommendations in this report and make appropriate changes. 3 1 Exploration Borings The exploration borings were completed by advancing a 4.75-inch, inside-diameter, hollow- stem auger with a truck-mounted drill rig. During the drilling process, samples were generally obtained at eithe� 2.5 or 5-foot-depth intervals. The borings were continuously observed and �ogged by a geotechnical engineec from our firm• 'I'he exploration logs presented in tha ASSOCIAIED F.1R171 SCIE�'CES, lNC. lune 1[, 2008 Page 2 EG/Id-FF.OBOZI3A3-ProJtCA�b�13��