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I <br /> . theses and dissertations prepazed by students at University of Oregon or Oregon State <br /> University, studies made by local and regional planning boazds, and knowledgeable <br /> <br /> ~ individuals such as university professors, reference librarians, geotechnical <br /> engineering firms, engineering geology firms, site exploration firms, local quarry <br /> ~ operators, construction aggregate suppliers, and appropriate persons from agencies ' <br /> <br /> ~ I such as State geological surveys, the US Geological Survey (tTSGS), and the US <br /> Army Corps of Engineers (ACOE). <br /> 2.2 Site Investi ag <br /> t,_ ion. The site visit shall focus on conditions, such as, but not <br /> limited to, the presence of expansive clay, slope movement, shallow groundwater or surface <br /> water, presence of fill, hazardous materials, or subsurface obstructions that require special <br /> design considerations. The site reconnaissance shall be performed by a Qualified Registered <br /> ~ Professional and include the following items (as applicable): <br /> i ~ 2.2.1 Verify topography as indicated on contour map. Measure maximum <br /> slopes using clinometer or equivalent. <br /> j 2.2.2 Check existing cuts/exposures to determine soil depth, characteristics, <br /> classification and/or rock type/weathering state/depth. <br /> 2.2.3 Check. for evidence of seeps/springs and vegetation characteristics <br /> 2.2.4 Check for evidence of slope movement/creep, including leaning <br /> conifers, pistol-butts on trees, sweeps (long curved sections~n conifers, and <br /> topographic features. <br /> 2.2.5 Check performance of adjacent structures by noting any <br /> ciacking/unevenpavement, cracked/separatedsidewalks anddriveways,uneven roof- <br /> lines and/or cracked/separated foundations. <br /> 2.2.6 If possible, contact owners/contractors of adjacent lots to evaluate <br /> anecdotal observations of the site and surrounding area in regazd to soils, hydrology, <br /> and construction conflicts. <br /> 3. Report Content. <br /> ~ 3.1 Introduction: <br /> ~ 3.1.1 Purpose and scope of investigation. <br /> 3.1.2 Client or party that commissioned the report. <br /> 3.1.3 Authorization for study. <br /> 3.2 Project Location and Description: <br /> 3.2.1 Site location and description, including topography, slopes within and <br /> adjacent to the project. <br /> 3.2.2 Description of proposed development, structures, and/or facilities. <br /> 3.2.3 Description of <br /> previous investigations,previous structures on the site, <br /> project file data, and anecdotal information from residents, as applicable. <br /> 3.2.4 Geologic setting --discussion, based on literature survey, of the local <br /> surficial geology that may affect the project and potential geologic-natural hazazds, <br /> including potential seismic events. <br /> 3.2.5 Site reconnaissance observations topography; slopes; exposures; <br /> ~ condition of adjacent structures; drainage features, vegetation. <br /> 3.3 Conclusions. <br /> f 3.3.1 Summary of site subsurface soiUrock conditions, based on literature <br /> survey and site reconnaissance. <br /> 3.3.2 Indications of the absence or presence of potentially expansive clays, <br /> ' Administrative Otder - 7 <br /> r.\edminord~rutes\02geotech l ao.wpd(09/05/02) <br /> <br />