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1: [~ RHODES AND ASSOC/A TES, /NC. <br />_ ~ SOIL AND GEOLOGICAL CONSULTANTS <br />June 02, 1982 <br />Mr. Ben T. Quinn <br />American Materials, Inc. <br />P. 0. Box 198 <br />Glasgow, Kentucky 42141 <br />Re: Laboratory Testing <br />Trinidad Basin Mining <br />DelAuga Canyon, Colorado <br />Dear Plr. Quinn: <br />2627 XEGENGY F04D <br />LE%IN4TDM, KE HT UC%7 +010! <br />lane) zTe-o+ea <br />As requested, this office performed laboratory soils tests <br />on a soil sample delivered to our firm by you. The results of <br />this testing are as follows: <br />I Soil Description: Clay, Silt and Rock Fragments (shale, <br />~ • sandstone and coal) with a trace of organic material, <br />dark gray <br />Gradation Analysis: <br />7, Rock Fragments: 37 <br />7. Silt: 43 <br />7, Clay: 20 <br />Atterberg Limits: <br />Liquid Limit (7,): 38 <br />Plasticity Index (7): 12 <br />Specific Gravity: 2.60 <br />Standard Proctor Test (ASTM D-698): <br />Maximum Dr.y Density: 97.7 pcf <br />Optimum Moisture Content: 21.7% <br />Triaxial Compression Tests (consolidated, undrained with pore <br />pressure measurement): <br />Effective Stress Shear Strength (@): 29.3° <br />Effective Cohesion (c): 0 psf <br />~. <br /> <br />