3400 RIVERFRONT BLVD Geotech Report 2022-10-25

• • • • • Construction traffic should be limited to unpaved portions of the road or temporary haul roads • to prevent disturbance of the subgrade. Construction traffic should not be allowed on new pavements, unless an allowance for these construction loads was included in the pavement design. • A submittal should be made for each pavement material prior to the start of paving operations. Each submittal should include the test information necessary to evaluate the degree to which the • material's properties comply with the properties that were recommended or specified. The • project geotechnical engineer and other appropriate members of the design team should review • each submittal. • 7.0 OBSERVATION OF CONSTRUCTION • • Satisfactory foundation and earthwork performance depends to a large degree on quality of • construction. Sufficient observation of the contractor's activities is a key part of determining that • the work is completed in accordance with the construction drawings and specifications. Subsurface conditions observed during construction should be compared with those • encountered during the subsurface exploration. Recognition of changed conditions often • requires experience; therefore, qualified personnel should visit the site with sufficient frequency • to detect if subsurface conditions change significantly from those anticipated. • We recommend that GeoDesign be retained to observe earthwork activities. We anticipate that • this will consist of settlement monitoring, evaluating footing, floor slab, driveway, and pavement • subgrade, observing the placement of structural fill, cement amendment activities, repair of soft • subgrade areas, asphalt paving, retaining wall construction, and performing laboratory compaction and field moisture-density tests. • • 8.0 LIMITATIONS •• We have prepared this report for use by Polygon Northwest Company and their design and construction team for the proposed project. The data and report can be used for bidding or • estimating purposes, but our report, conclusions, and interpretations should not be construed as • warranty of the subsurface conditions and are not applicable to other sites. • Exploration observations indicate soil conditions only at specific locations and only to the depths • penetrated. They do not necessarily reflect soil strata or water level variations that may exist • between exploration locations. If subsurface conditions differing from those described are noted • during the course of excavation and construction, re-evaluation will be necessary. • The site development plans and design details were preliminary at the time this report was • prepared. When the design has been finalized and if there are changes in the site grades or • location, configuration, design loads, or type of construction for the buildings, the conclusions • and recommendations presented may not be applicable. If design changes are made, we request • that we be retained to review our conclusions and recommendations, and to provide a written modification or verification. • • G EO DESIGN? 23 Polygon-128-01:091615