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GeoTest Services, Inc. October 8, 2021 <br /> 2405 Hillside Lane, Everett,WA Project No. 21-0845 <br /> IMMO <br /> Subsurface Soil Conditions <br /> Subsurface conditions were explored by advancing 3 exploratory test pits on September 9, 2021. <br /> The explorations were advanced to approximate depths of 10 to 12 feet below ground surface <br /> (BGS) with a tracked excavator subcontracted by Fullwiler Construction. Inc. The approximate <br /> locations of these explorations have been plotted on the Site and Exploration Plan (Figure 2A). <br /> The exploratory test pits exhibited relatively similar subsurface soil conditions throughout the <br /> vicinity of the proposed development. GeoTest observed between 0.5 and 3 feet of loose topsoil <br /> and previously placed fill soils overlying native soils at depth. Fill was observed in TP-1 and TP-3, <br /> whereas TP-2 had no signs of fill. The fill soils observed on-site were comprised of soft, brown- <br /> gray, moist, sandy silt with few organics (regraded site materials)overlying relict topsoil. Cement <br /> debris was encountered within the fill soils in TP-3. The near surface native soils directly <br /> underlying the fill and relict topsoil were comprised mostly of medium stiff to stiff, brown, moist, <br /> sandy silt, in which GeoTest interpreted to be Fraser to Pre Fraser Transitional Beds. The soils <br /> became stiff to very stiff at approximately 7.5 feet BGS in TP-1, 4 feet BGS in TP-2, and 11.5 feet <br /> BGS in TP-3.The stiff to very stiff soils were encountered to the maximum explored depth of the <br /> test pits. <br /> More detailed logs of the subsurface conditions encountered within our exploration are <br /> presented in the Test Pit Logs attached to the end of this report. <br /> ►, 14114 . •1 i,, 'mow <br /> Images 2 and 3.The vicinity of the two southern proposed houses on lots 2 and 3. <br /> General Geologic Conditions <br /> Geologic information for the project site was obtained from the Distribution and description of <br /> geologic units in the Mukilteo quadrangle, Washington (Minard, 1982). According to this <br /> publication, geology within the vicinity of the project site consists of Vashon Till (map unit Qvt) <br /> and Transitional Beds(map unit Qtb) of the Frasier Glaciation event, as well as the older Whidbey <br /> Formation (map unit Qw). The Transitional Beds typically consist of mostly clay, silt, and fine to <br /> 3 <br />