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^ Geotechnical Engineering Investigation ` � <br />Schwab Residence <br />" July 13, 2001 <br />NGA File No. 329401 <br />Page 2 <br />SCOPE <br />The purpose of this study is to evaluate the site subsurf'ace soils and hydrologic conditions and <br />provide recommendations for site development. Specifically, our scope of services includes the <br />following: <br />1. Review soils and geologic maps for the project area. <br />2. Observe and map slope geometry and current surfici3l conditions. <br />3. Explore the site subsurface soil conditions with backhoe-excavated test pits. The <br />backhoe was subcontracted by us. <br />4. Provide recommendations for foundation embedment and effective footing <br />setback criteria. <br />5. Provide recommendations for site drainage. <br />6. Prepare a report to document our findings and recommendations. <br />5ITE CONDITIONS <br />Surface <br />The site is an irregular-shaped parcel covering approximately one-third of an acre. The site is <br />bordered on the northern, southern and western sic'�s by existing residences, and by 52nd Place <br />SW on the eastern side. Lot layout and approxim�ted residence footprint are shown on the Site <br />Plan in Figure'L. <br />The development portion of the site consisu of an area sloping gently from the edge of the road <br />down toward the west to a distinct top of slope. The remainder of the site slopes steeply down to <br />the west. We measured Cross-Section A-A' across the site using a 100-foot tape measure and a <br />hand-held clinometer. 7'he cross-section is presented as Figure 3. The site inclines at <br />approximately 10 degrees down to the west within the upper portion. The steep slope average <br />inclination was measured to vary behveen 30 to 35 degrees with total relief of approximately 40 <br />feet between the eastem and western ends of the site. <br />The gently-sloping portion of the site near the top of the slope has been cleazed of vegetation, <br />except for a mature maple tree. This portion of the site is currently covered with field grass. The <br />steep slope is covered with ferns, blackberry bushes, and sc�ttered young and mature deciduous <br />and fir trees. Two old gowth stumps were observed near the tce of the slope. <br />NELSON GEOTECHN/CAL ASSOC/ATES, /NC. � <br />a <br />