_GENERAL DOCUMENTS - C1981017 (221)

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Client Name: CHEN-NORTHERN, INC. September 13, 1991 GLENWOOD SPRINGS, CO Sheet 22 of 26 Project No. : 90-909 Project Name: Mid Continent Mine Laboratory No. : 118962 Sample Name: GRAB 1211 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 16 tons/1000 tons 09/09/91 Calcium Carbonate 2.24 % 09/04/91 Cation Exchange Capacity 18 meq/100 gm 09/09/91 Electrical Conductivity Saturated Paste 0.94 mmhos/cm 09/04/91 Exchangeable Sodium Percent 3.3 % 09/09/91 Gypsum * 09/09/91 Neutralization Potential 22.4 tons/1000 tons 09/04/91 Organic Matter 4.78 % 08/29/91 pH Saturated Paste 6.5 S.U. 08/29/91 Saturation 35.8 % 08/29/91 Sieve Fraction <2mm 37.4 % 08/26/91 Sieve Fraction >2mm 62.6 % 08/26/91 Sodium Absorption Ratio 2.10 08/30/91 Solids, Combustible 9.32 % 09/04/91 Sulfur (Total Eschka) 0.20 % 09/05/91 Sulfur Pyritic as S 0.07 % 09/06/91 Sulfur Sulfate as S <0.01 % 09/06/91 Sulfur Organic as S 0.13 % 09/06/91 PARTICLE SIZE ANALYSIS: Sand 45.1 % 08/23/91 Silt 34.5 % 08/23/91 Clay 20.4 % 08/23/91 Texture, USDA LOAM 08/28/91 * None detected Chen-Northern, Inc. Consulting Engineers and Scientists