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R <br />Applegate Group, Inc. <br />October 17, 2006 <br />Page 2 <br />sand, which extended to the explored depth of 4 feet. The pit excavated on the <br />Reservoir 2 side slope encountered approximately 2 feet of saturated lean clay with <br />sand overlying claystone bedrock, which extended to the explored depth of 4 feet. <br />Laboratory Testing: Selected samples from the pits were returned to our laboratory <br />for testing. Testing included grain size analysis (gradation and hydrometer <br />analyses), Atterberg Limits, standard Proctor moisture-density relationships, falling <br />head permeability, consolidated-undrained (CU) triaxial shear strength testing, <br />pinhole and crumb dispersion testing. The triaxial shear strength and permeability <br />testing was performed by Knight Piesold on samples compacted to approximately <br />95% of the maximum standard Proctor density near the optimum moisture content. <br />An interpretation of total and effective shear strength, based on stress path analysis <br />methods was performed by Knight Piesold. Results of the testing are summarized <br />herein and test results are presented in the attached appendix to this letter. <br />Pit 1 @ depth 0 to 2 feet <br />Unified Classification Silty, clayey sand <br />Gravel (%) 2 <br />Sand (%) 57 <br />Passing No. 200 Sieve 1%) 41 <br />ASTM D 698 Maximum Dry Density (pcf) 107.7 <br />ASTM D 698 Optimum Moisture Content 1%) 16.1 <br />Liquid Limit 1%1 25 <br />Plastic Index (%) 7 <br />Pinhole Dispersion @ 95% maximum density Non-dispersive <br />Crumb Dispersion Grade 2, Intermediate <br />Permeability @ 95% maximum density (cm/sec) 9.6E-05 <br />Cohesion-Total (C) ksf 0.14*/0.14** <br />Cohesion-Effective (C), Effective 0/0* <br />Angle of Internal Friction (0)-Total, degrees 21.8*/20.4** <br />Angle of Internal Friction (fd)-Effective, degrees 34.8*/29.7** <br />Tan (0), Total 0.4*/0.37** <br />Tan (0), Effective 0.7*/0.57** <br />* Based on Mohr's circle method; **Based on Stress path method <br />Pit 1 @ depth 2 to 4 feet <br />Unified Classification Gravel with Sand <br />Gravel (%- 54 <br />Sand (%) 36 <br />Passing No. 200 Sieve (%) 10 <br />Liquid Limit (%) NV <br />Plastic Index (%- NP <br />Kumar & Associates, Inc. <br />