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y:3 <br /> h'4 KLEINFELDER <br /> File No.: 20-3121-02 <br /> November 2, 1988 <br /> Page 10 <br /> these R-Value Tests have all been greater than 50. Based on a design R-Value of 50, <br /> assumed Traffic Indices of 4.0 for general parking and 5.5 for main aisles and truck <br /> traffic and the church requirement of a 3-inch asphalt concrete section, we recommend <br /> the following pavement sections: <br /> Recommended Recommended <br /> Thickness of Minimum Thickness <br /> Area Asphalt Concrete of Aggregate Base <br /> General Parking and <br /> Main Aisles and Truck Traffic 3" 4" <br /> The subgrade soils over which these paving materials are placed should be compacted . <br /> to a minimum depth of 6 inches to a minimum of 95 percent of the ASTM D-1557 <br /> maximum dry density. In addition, it is recommended that all pavements conform to <br /> the following criteria: <br /> 1. All trench backfills, including utility and sprinkler lines, <br /> should be properly placed and adequately compacted to provide <br /> r a stable subgrade. <br /> 2. An adequate drainage system should be provided to prevent surface <br /> water or subsurface seepage from saturating the subgrade soil. <br /> 3. The aggregate base should be compacted to a minimum of 95 percent <br /> of the ASTM D-1557 test density. <br /> — 4. The aggregate base and asphalt concrete materials should conform <br /> to the specifications stated in Sections 26 and 39, respectively, <br /> of the State of California Standard Specifications, latest <br />