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Project No. JB -314 24 March 2003 Page 12 structures, plants that require very little moisture with drip irrigation systems should be used. Sprinkler heads should not be placed where they could saturate foundation soil. 6.7 Pavements Based on the laboratory R -value test result of 5, we recommend the pavement sections listed in Table 5. The recommended sections are based on the assumed Traffic Indices (TI). The recommended pavement section should be revised if site grading changes the characteristic of the near surface soil condition or a different TI is desired. Subgrade for the on-site paved areas should be properly prepared as discussed in the Earthwork section of this report and as recommended below prior to placing asphalt or aggregate base materials. Proper drainage of paved areas should be provided to prevent water from entering beneath the pavement to help increase the life of the pavement and help avoid possible premature failure. Table 5 PAVEMENT DESIGN CRITERIA TRAFFIC INDEX ASPHALT AGGREGATE BASE (inches) (mm) (inches) (mm) Flexible Pavement 5.0 3 80 10 255 5.5 3 Y, 90 11 280 6.0 3% 90 13 330 6.5 4 105 14 355 Full Depth Asphalt Concrete 5.0 7% 190 -- -- 5.5 8 Y, 215 -- -- 6.0 9 230 -- -- 6.5 10 255 -- -- Rigid Pavement CONCRETE AGGREGATE BASE (inches( (mm) (inches) (mm) Concrete Pavement 6 155 6 155 To perform to its greatest efficiency, the pavement section requires the following construction criteria:. a. Remove organic and deleterious materials from all pavement subgrade. �Korbmacher Engineering, Inc.