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Page 8 TL 386-018-00 <br /> depths of 10 to 12 feet underlain by poorly graded sands to the <br /> depths explored. <br /> The foregoing is a general summary of the soil conditions <br /> encountered in the borings drilled for this investigation. <br /> Detailed descriptions of the soils encountered in each boring are <br /> presented on the logs of borings in Appendix A . The <br /> stratification linea shown on the logs represent the approximate <br /> boundary between soil types ; the actual in-situ transition may be <br /> gradual. <br /> 5. 2 Soil Properties : The near-surface silty sand material <br /> was very loose to loose in Boring 1 , with standard penetration <br /> resistance , N-values , ranging from 3 to 7 blows per foot in the <br /> upper 7 feet. The silty sand was medium dense to very dense in <br /> Borings 2 and 3 , with N-values ranging from 14 to 32 blows per <br /> foot. Natural moisture content of the material ranged from 5 to <br /> 10 percent. A direct shear test indicated an angle of internal <br /> friction of 41 % <br /> A maximum density- optimum moisture determination , ASTM <br /> D1557 , conducted on a near- surface soil sample indicated a <br /> maximum dry density of 118. 3 pounds per cubic foot at an optimum <br /> moisture of 9. 4 percent. In-place density testa at two locations <br /> over the buried pipe indicated relative compactions of 90. 2 and <br /> 91. 4 percent at a depth of 1. 0 to 2. 0 feet below existing grade. <br /> . arlitaadninq�i�otaroUwa.�iu. <br /> Fresno Modesto!! Visalia Bakersfield <br />