_GENERAL DOCUMENTS - C1981017 (255)

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C- Client Name: CHEN-NORTHERN, INC. September 13, 1991 GLENWOOD SPRINGS, CO Sheet 8 of 26 Project No. : 90-909 Project Name: Mid Continent Mine Laboratory No. : 118954 Sample Name: GRAB 1811 DEPTH SUTEY WEST Sample Date: 08/15/91 Collected by: RICK THOMAS Time Sampled: None Given AVERAGE DATE PARAMETER VALUE ANALYZED SOIL CONSTITUENTS: Acid/Base Potential 28 tons/1000 tons 09/09/91 Calcium Carbonate 3.65 % 09/04/91 Cation Exchange Capacity 20 meq/100 gm 09/09/91 Electrical Conductivity Saturated Paste 1.11 mmhos/cm 09/04/91 Exchangeable Sodium Percent 4.0 % 09/09/91 Gypsum * 09/09/91 Neutralization Potential 36.5 tons/1000 tons 09/04/91 Organic Matter 5.31 % 08/29/91 pH Saturated Paste 7.2 S.U. 08/29/91 Saturation 48.9 % 08/29/91 Sieve Fraction <2mm 16.7 % 08/26/91 Sieve Fraction >2mm 83.3 % 08/26/91 Sodium Absorption Ratio 1.74 08/30/91 Solids, Combustible 7.12 % 09/04/91 Sulfur (Total Eschka) 0.28 % 09/05/91 Sulfur Pyritic as S 0.13 % 09/06/91 Sulfur Sulfate as S 0.02 % 09/06/91 Sulfur Organic as S 0.13 % 09/06/91 PARTICLE SIZE ANALYSIS: Sand 32.5 % 08/23/91 Silt 40.0 % 08/23/91 Clay 27.5 % 08/23/91 Texture, USDA CLAY LOAM 08/28/91 * None detected Chen-Northern, Inc. Consulting Engineers and Scientists