954 NORTH PARK DR 2023-10-31 - Laserfiche WebLink

GeoTest Services, Inc. September 6, 2019 Proposed Swimming Pool — 954 North Park Drive, Everett, WA Project No. 19-0361 been heavily compacted by overlying ice. The transitional beds (Qtb) are described as clay, slit, and fine sand with generally high moisture content, occasional organics, and local vertical jointing. The native soils encountered in the explorations appear to be consistent with published geological information. Groundwater Groundwater was not encountered at the time of our subsurface explorations. The groundwater conditions reported on the exploration logs are for the specific locations and dates indicated, and therefore may not be indicative of other locations and/or times. Groundwater levels are variable and groundwater conditions will fluctuate depending on local subsurface conditions, precipitation, and changes in on -site and off -site use. Web Soil Survey According to the United States Department of Agriculture (USDA) Natural Resources Conservation Service (NRCS) Web Soil Survey, soils at the upper elevation of the property (around the existing residence) classify as Alderwood-Urban land complex. Soils at lower elevation and along the slopes classified as Alderwood-Everett gravelly sandy loams. Further details of the soil types are provided in Table 1 below. Table 1 USDA Web Soil $urVey Soil.Glassit�ca#usns, Map Unit Symbol 4 5 Map Unit Name Alderwood-Everett gravelly sandy loams, 25 Alderwood-Urban Land Complex, 2 to 8 to 70 percent slopes percent slopes Soil Description Gravelly to very gravelly, ashy, sandy loam Gravelly to very gravelly, ashy, sandy over gravelly, sandy loam loam over extremely gravelly sand Landform Till Plains Terraces, plains Parent Material Basal Till Glacial Outwash Land Capability Classification 7e 7e Erosion K Factor, Whole Soil 0.05 0.05 The Alderwood-Everett Complex soils have a Land Capability Classification of "e". This subclass is made up of soils where erosion is the dominant problem or hazard in their use (USDA, 1961). Both groups identified on the map are assigned a whole soil erosion factor K of 0.05, corresponding to generally low erosion potential. Other factors, such as vegetation and ground slope, influence erosive potential of the soil. Further descriptions and interpretations of soil erosion are provided in the Erosion Hazards section of this report. 5