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• Client Name: CHEN-NORTHERN, INC. September 13, 1991 GLENWOOD SPRINGS, CO Sheet 24 of 26 Project No. : 90-909 Project Name: Mid Continent Mine Laboratory No. : 118963 Sample Name: GRAB 19" DEPTH SUTEY SOUTH Sample Date: 08/15/91 Collected by: RICK THOMAS Time Sampled: None Given AVERAGE DATE PARAMETER VALUE ANALYZED SOIL CONSTITUENTS: Acid/Base Potential 4 tons/1000 tons 09/09/91 Calcium Carbonate 2.14 % 09/04/91 Cation Exchange Capacity 18 meq/100 gm 09/09/91 Electrical Conductivity Saturated Paste 1.58 mmhos/cm 09/04/91 Exchangeable Sodium Percent 4.4 % 09/09/91 Gypsum * 09/09/91 Neutralization Potential 21.4 tons/1000 tons 09/04/91 Organic Matter 4.40 % 08/29/91 pH Saturated Paste 6.4 S.U. 08/29/91 Saturation 35.7 % 08/29/91 Sieve Fraction <2mm 33.7 % 08/26/91 Sieve Fraction >2mm 66.3 % 08/26/91 Sodium Absorption Ratio 3.72 08/30/91 Solids, Combustible 8.83 % 09/04/91 Sulfur (Total Eschka) 0.54 % 09/05/91 Sulfur Pyritic as S 0.06 % 09/06/91 Sulfur Sulfate as S <0.01 % 09/06/91 Sulfur Organic as S 0.48 % 09/06/91 PARTICLE SIZE ANALYSIS: Sand 48.9 % 08/23/91 Silt 32.6 % 08/23/91 Clay 18.5 % 08/23/91 Texture, USDA LOAM 08/28/91 * None detected Chen-Northern, Inc. Consulting Engineers and Scientists