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BLACK AVENUE RESIDENTIAL <br />DEVELOPMENT <br />648-26-1 <br />Page 11 <br />SECTION 9: VEHICULAR PAVEMENTS <br />9.1 ASPHALT CONCRETE <br />The following asphalt concrete pavement recommendations tabulated below are based on the <br />Procedure 608 of the Caltrans Highway Design Manual, estimated traffic indices for various <br />pavement-loading conditions, and on a design R-value of 15. The design R-value was chosen <br />based on engineering judgment considering the native clay soils and variable surface <br />conditions. <br />Table 3: Asphalt Concrete Pavement Recommendations, Design R-value = 15 <br />Design <br />Traffic Index <br />(TI) <br />Asphalt <br />Concrete <br />(inches) <br />Class 2 <br />Aggregate <br />Base (inches) <br />Total Pavement <br />Section Thickness <br />(inches) <br />4.0 2.5 6.5 9.0 <br />4.5 2.5 8.0 10.5 <br />5.0 3.0 8.0 11.0 <br />5.5 3.0 10.0 13.0 <br />6.0 3.5 10.5 14.0 <br />6.5 4.0 11.5 15.5 <br />Note: Caltrans Class 2 aggregate base; minimum R-value of 78 <br />Preliminary subgrade R-value assumed to be 15 <br />SECTION 10: LIMITATIONS <br />This report, an instrument of professional service, has been prepared for the sole use of TTLC <br />Management, Inc. and Arizona Corporationspecifically to support the preliminary design of the <br />4400 Black Avenue project in Pleasanton, California. The opinions, conclusions, and <br />recommendations presented in this report have been formulated in accordance with accepted <br />geotechnical engineering practices that exist in Northern California at the time this report was <br />prepared. No warranty, expressed or implied, is made or should be inferred. <br />Preliminary recommendations in this report are based upon the soil and groundwater conditions <br />encountered during our subsurface exploration. If variations or unsuitable conditions are <br />encountered during construction, Cornerstone must be contacted to provide supplemental <br />recommendations, as needed. <br />TTLC Management, Inc. may have provided Cornerstone with plans, reports and other <br />documents prepared by others. TTLC Management, Inc. understands that Cornerstone <br />reviewed and relied on the information presented in these documents and cannot be <br />responsible for their accuracy. <br />Total Pavement Total Pavement <br />Section Thickness Section Thickness <br />(inches)(inches) <br />9.0 <br />10.5 <br />1111.0.0 <br />13.0 <br />10.5 10.5 114.04.0 <br />11.5 15.5 15.5 <br />Caltrans Class 2 aggregate base; minimum RCaltrans Class 2 aggregate base; minimum R-value of 78value of 78 <br />value assumed to be value assumed to be 15 <br />SECTION 10: LIMITATIONSSECTION 10: LIMITATIONS <br />This report, an instrument of professional service, has been prepared for the sole use of This report, an instrument of professional service, has been prepared for the sole use of <br />, Inc. and Arizona Corporationspecifically to support the preliminary design of the , Inc. and Arizona Corporationspecifically to support the preliminary design of the <br />project in project in PleasantonPleasanton <br />recommendations presented in this report have been formulated in accordance with accepted recommendations presented in this report have been formulated in accordance with accepted <br />geotechnical engineering practices that exist in Northern California at the time this report was geotechnical engineering practices that exist in Northern California at the time this report was <br />prepared. No warranty, expressed or implied, is made or should be inferred.prepared. No warranty, expressed or implied, is made or should be inferred.