1505 112TH ST SW 2018-01-02 MF Import

GEoTECIINICAL ENGINEERING STUDY E-5913 Wells Development Corporation Page a July 27, 1992 Asphaltic concrete (AC), Asphalt Treated Ease (ATB), and Crushed Rock Base (CRB) materials should all conform to the WSDOT specifications. All rock base should be compacted to at least 95 percent of the ASTM D-1557-78 laboratory test standard. It should be noted that parking stall pavement sections assume no heavy truck traffic. In addition, the above pavement sections are based on a 10-year design period. it is n=mmended that concrete slabs which are placed directly over a native soil subgrade and are subject to vehicle traffic loads be at least six inches in thickness. It is also suggested that nominal reinforcement such as '6x6-10/10' welded wire mesh be employed, at near midpoint, in new exterior concrete slabs and paving. Our recommendations and conclusions are based on the site materials observed, selective laboratory testing and engineering analyses, the design information provided us by you, and our experience and engineering judgement. The conclusions and recommendations are professional opinions derived in a manner consistent with that level of care and skill ordinarily exercised by other members of the profession currently practicing under similar conditions in this area. No warranty is expressed or implied. The recommendations submitted in this report are based upon the data obtain -A from the test pits. Soil and groundwater conditions between test pits may vary from those encountemsd. The nature and extent of variations between our exploratory locations may not become evident until construction. /f variations do appear, ECI should be requested to reevaluate the recommendations of this report and to modify or verify them in writing prior to proceeding with the construction. This office will be available to provide consultation services relating to review of the final design and specifications to verify that the recommendations within our purview have been properly interpreted and implemented in the approved construction plans and specifications. In addition, it is suggested that this office be retained w provide geotechnical services during construction to observe compliance with the design concepts and project specifications, and to allow design changes in the event subsurface conditions differ from those anticipated prior to the start of construction. It should be noted that it is generally in the best interests of the owner/client to maintain the same Soils Fngineer during construction in order to obtain the project objective, with optimum quality control. Earth Consultants, Inc.