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1 <br /> ' June 23, 2014 <br /> Project No. T-6241 <br /> ' The paving materials used should conform to the current Washington State Department of Transportation <br /> (WSDOT)specifications for 1/2-inch hot mix asphalt HMA and CRB surfacing. <br /> ' Long-term pavement performance will depend on surface drainage. A poorly-drained pavement section will be <br /> subject to premature failure as a result of surface water infiltrating into the subgrade soils and reducing their <br /> ' supporting capability. For optimum performance, we recommend surface drainage gradients of at least two <br /> percent.. Some degree of longitudinal and transverse cracking of the pavement surface should be expected over <br /> time. Regular maintenance should be planned to seal cracks when they occur. <br /> 6.0 ADDITIONAL SERVICES <br /> ' Terra Associates, Inc. should review the final design and specifications in order to verify that earthwork and <br /> foundation recommendations have been properly interpreted and incorporated in project design. We should also <br /> ' provide geotechnical services during construction in order to observe compliance with our design concepts, <br /> specifications, and recommendations. This will also allow for design changes if subsurface conditions differ <br /> from those anticipated prior to the start of construction. <br /> ' 7.0 LIMITATIONS <br /> We prepared this preliminary report in accordance with generally accepted geotechnical engineering practices. <br /> ' This report is the copyrighted property of Terra Associates, Inc. and is intended for specific application to the <br /> Powdernill Business Center project in Everett, Washington. This report is for the exclusive use of Panattoni <br /> Development Company and their authorized representatives. No other warranty,expressed or implied, is made. <br /> ' The analyses and recommendations presented in this report are based upon data obtained from the test pits <br /> advanced on-site. Variations in soil conditions can occur, the nature and extent of which may not become <br /> ' evident until construction. If variations appear evident, Terra Associates, Inc. should be requested to reevaluate <br /> the recommendations in this report prior to proceeding with construction. <br /> 1 <br /> Page No. 13 <br />