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• GEOTECH I~ Civil, Sbvctural & Geotechnical Engineers <br />222 South Park Ave. • Montrose, CO 81401 <br />Ph.: 1970) 249.6828 • FAX: (970j 248-0945 <br />Sieve Analysis and Atterbera Lim~9ts <br />Project Name McClane Canyon Mine Gob Pile Stability Date 9/28/2007 <br />Project Location Garfield County CO Project # 07-334-GEO <br />Client McClane Canyon Mining, LLC 'Sample by BB <br />Test Location BH#02 @5-6.5' Tested by BAU <br />Sample # GS#6 <br />Sieve Analysis <br />ASTM C136 / C117 <br /> <br />Sieve Opening <br />1mm) ° <br />/° Passing <br />3" 76.2 100.0 <br />3/4" 19.0 100.0 <br />3/8" 9.5 99.7 <br />#4 4.750 96.6 <br />#10 2.000 92.6 <br />#40 0.425 88.0 <br />#200 0.075 55.2 <br />Atterberg Limits <br />ASTM D4318 <br />Liquid Liimit (LL) 23 <br />Plastic (Limit (PL) 17 <br />Plasticity 9ndex (PI) 6 <br />Natural Moisture Content (%) = 15.5% <br />Soil Description brown sandy silty CLAY <br />USCS Classification CL-ML <br />#200 #40 #10 #4 314" 3" <br />100 <br />90 <br />80 <br />70 <br />rn <br />N 60 <br />N <br />rtf <br />°- 50 <br />r <br />c <br />d <br />40 <br />m <br />a <br />30 <br />20 <br />10 <br />0 -1- <br />0.01 <br />10 <br />0.1 particle Diameter (mm) <br />Clay/Silt Fine Medium Coarse Fine Coarse <br />FINES SAND GRAVEL <br />Fines = 55.2 % Sand = 41.4 % Gravel = 3.4 <br />100 <br />