1329 MADRONA AVE Geotech Report 2022-10-25

. t . Subsurface Exploration,Geologic Hazard,and Janowicz Property Geotechnical Engineering Report Everett,Washington Project and Site Conditions single-family residence,a driveway,and other related site developments on the property. Plans for the proposed construction have not been provided to us. The site slopes down to the west at roughly 20 percent, to the top of a near-vertical slope above the railroad right-of-way and the shores of Possession Sound. A subtle draw near the center of the lot extends for the full length of the property. The plat map indicates that this subtle draw may be a designated drainage collection. Vegetation on the lot includes grasses and woody vegetation that have been mowed to within a foot of the surface. On the near-vertical slope that leads to the beach there are several deciduous trees with bowed trunks that lean out of the slope. Adjacent properties are landscaped with grass lawns,.shrubs,and trees. 3.0 SITE EXPLORATION The site exploration was made on March 15, 2018, and consisted of two exploration borings. The various types of materials and sediments encountered in the explorations, as well as the depths where characteristics of these materials changed, are indicated on the exploration boring logs presented in the Appendix. The depths indicated on the logs where conditions changed may represent gradational variations between sediment types in the field. If changes • occurred between sample intervals in our borings, they were interpreted. The approximate locations of the exploration borings are shown on Figure 2. The conclusions and recommendations presented in this report are based on the exploration borings completed for this study. The locations and depths of the explorations were completed within site access and budgetary constraints. Because of the nature of exploratory work below ground,extrapolation of subsurface conditions between and beyond the field explorations is necessary. 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 and/or filling. The nature and extent of any variations between and beyond the field explorations may not become fully evident until construction. If variations are observed at that time, it may be necessary to re-evaluate specific recommendations in this report and make appropriate changes. 3.1 Exploration Borings The borings were drilled using a walk-behind, hollow-stem auger drill rig. During the drilling process, samples were obtained at 2.5- and 5-foot intervals. The borings were continuously observed and logged by an engineering geologist from our firm. The interpretive exploration logs presented in the Appendix are based on the field logs,drilling action,and inspection of the samples collected. May 10,2018 ASSOCIATED EARTH SCIENCES,INC. Page 2 N5/7d-170699E002-2-Profects‘201706491KEIWP