931 BROADWAY SEPA 016 - 008 - TEUTSCH PARTNERS Geotech Report 2025-04-14

Geotechnical Report Proposed Student Housing: 931 Broadway Street, Everett, Washington December 8, 2015 different elevations. The descriptions of groundwater conditions and depths are likewise approximate. The following is a generalized description of the soils encountered in the borings. Asphalt/Fill: At our boring locations, we encountered 2 to 3 inches of asphalt pavement over a thin layer of crushed rock base course over fill soils generally comprised of loose, silty sand with organics. The existing fill extended to depths of 21/2 feet in boring PG-1 (located on the east side of the existing building), and to about 5 feet in borings PG-2 and PG-3 (west side of the existing building). The fill was characterized by its dark brown color and loose consistency. Vashon Till (Qvt): Underlying the fill, the test borings encountered medium dense to very dense silty fine to medium sand with gravel which we classified as Vashon Till. The upper approximately two to three feet of the till unit was weathered and medium dense grading to dense to very dense below the weathered material. All test borings were terminated in this soil unit. Our subsurface descriptions are based on the conditions encountered at the time of our exploration. Soil conditions between our exploration locations may vary from those encountered. The nature and extent of variations between our exploratory locations may not become evident until construction. If variations do appear, PanGEO should be requested to reevaluate the recommendations in this report and to modify or verify them in writing prior to proceeding with earthwork and construction. 3.4 GROUNDWATER Evidence of groundwater seepage was not observed in our borings at the time of drilling. The till underlying the site generally has low permeability and perched groundwater may develop on top of the till, or in lenses of more permeable soil within the till formation. If encountered, we anticipate groundwater seepage rates will be minor. There will be fluctuations in seepage depending on the season, amount of rainfall, surface water runoff, and other factors. Generally, the water level is higher and seepage rates are greater in the wetter, winter months (typically October through May). 15-275 931 Broadway,Everett PageW PanGEO,Inc.