4812 HARBOR LN 2018-01-02 MF Import

1 December 3.1"0 Project No. T41" 3.0 SITE CONDITIONS 4.1 Surfacg The project site is situated along the west side of Harbor Lane in Everett, Washington. The approximate location of the site is shown on the Vicinity Map, Figure 1. The north and south property margins arc bounded by single- family residential development, while the majority of the west margin remains undeveloped. The east property margin is bounded by Harbor Lane and a grassy road shoulder and easements, including television able and storm drainage utilities. At the present time, debris on the site includes a minor amount of yard waste, old tires, scrap metal, a;A truh. The site currently supports a covering of grasses, vines, brush, scotch broom, and small to medium sized coniferous and deciduous trees. A few older evergreen trees were observed on the upper side slopes of the lot. Several large downed trees and stumps remain scattered across the property beneath the tall underbrush. The project site is situated on one of several east -west trending ravines in the Everett area. The building lot is centered in a west -trending swale that slopes towards a larger north -south trending ravine several hundred feet below the project site. The building site has local relief on the order of 40 feet. The north and south Swale margins make up the steeper portions of the building site relief with inclinations on the order of 30 to 38 percent, with some localized steeper portions. The site slopes appeared to be in a stable configuration and did not show signs of put movement or instability. Overall, site drainage is good due to the sloping nature of the site and near -surface soils. We did not observe any water occurring as surface seeps, or any ponding of surface water on the property. Remains of an erosion -control silt barrier and soft silty soils at the surface indicate the addition of fill soils by neighboring construction. In addition, rip -rap and loose surface soils along the road shoulder indicate some modification in the recent put. We did not observe indications of significant erosion. A storm drain and catch basin capped with rip -rap is located at the southeast corner of the property and collects surface water from street runoff. 3.2 Soils The soils we observed in the borings consisted of approximately 12 to 18 inches of forest duff and topsoil overlying silty sand with varying amounts of gravel and occasional cobbles. The upper silty sand is generally loose to medium dense and moist to a depth of 2.5 to 5.0 feet. Test Boring B-2 encountered medium dense, sandy silt immediately below the surficial topsoil. Below the upper medium dense soils, we observed dense to very dense glacially -compacted till composed of gravelly silty sand. The till soils underlay the site to the maximum depth explored of 14 feet below existing grade. The Boring Logs, attached in Appendix A, provide a more detailed description of the subsurface conditions encountered in the test borings. The approximate boring locations are shown on Figure 2. Page No. 2