10111 9TH AVE W EMERALD COURT APARTMENTS Geotech Report 2022-10-20

t � Geotechnical Engineering Evaluation NGA File No.910814 Emerald Court Apartment Building November 21,2014 Everett,Washington Page 2 8. Document the results of our findings, conclusions, and recommendations in a written geotechnical report. SITE CONDITIONS Surface Conditions The property consists of a rectangular,roughly 0.9-acre parcel that is generally level. The site is currently vacant and is vegetated with scattered weeds and brush. The property is bounded to the north and east by residential condominium/apartment properties,to the west by 9th Avenue West, and to the south by a self- storage unit complex. It is our understanding that minor grading had occurred in the past on this site to remove most of the topsoil from the property. We did not observe surface water within the site during our site visit on October 29,2014. Subsurface Conditions Geology: The geologic units for this site are shown on the Geologic Map of the Everett 7.5-Minute Quadrangle, Snohomish County, Washington by James P. Minard, (1985). The site is mapped as Qvt (Vachon till). The till is described as a non-sorted mixture of clay, silt, sand, pebbles, cobbles, and boulders. Our explorations within the site generally encountered surficial topsoil underlain by till at depth. Explorations: The subsurface conditions within the site were explored on Wednesday, October 29, 2014 by excavating six test pits to depths ranging from 6.3 to 9.7 feet below the existing ground surface. The approximate locations of our explorations are shown on the Site Plan in Figure 2. A geologist from NGA was present during the explorations, examined the soils and geologic conditions encountered, obtained samples of the different soil types,and maintained logs of the test pits. The soils were visually classified in general accordance with the Unified Soil Classification System, presented in Figure 3. The logs of our test pits are attached to this report and are presented as Figures 4 and 5. We present a brief summary of the subsurface conditions in the following paragraphs. For a detailed description of the subsurface conditions,the test pit logs should be reviewed. At the surface of Test Pits 1 and 2, which were located in the area of the planned building, we encountered approximately 0.1 feet of surficial weeds/scattered grasses. Below the weeds, we encountered approximately 0.7 feet of medium dense, orange-brown, silty, fine to medium sand with roots and iron-oxide staining. We interpreted this material as weathered glacial till. Below the weathered NELSON GEOTECHNICAL ASSOCIATES, INC.