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<br />GEOCHRON LABORATORIES adivision of <br />KRUEGER ENTERPRISES, INC. <br />71 t CONCORD AVENUE • CAMBRIDGE, MASSACHUSETTS 02138 • U . S . A <br />TELEPHONE (617) 8763691 TELEFAX (617) 661~OId8 <br />RADIOCARBON AGE DETERMINATION <br />Our Sample No. GX-2291 5 <br />Your Reference: letter of 03/03/97 <br />Submitted by: 14r. :<elly Payne <br />Mayo & Associates <br />710 East 100 North <br />Lindon, Utah 84042 <br />Sample Name: West Elk Well SOM-128H <br />groundwater precipitate <br />REPORT OF ANALYTICAL WORK <br />Date Received: 0 3/ 0 6/ 9 7 <br />Date Reported: 04/03/97 <br />• AGE = Greater than 38,010 C-14 years BP (C-13 corrected). <br />Less than 0.88 ~ of the modern (1950) C-14 activity. <br />Description: Sample of groundwater precipitate. <br />Pretreatment: The barium salt precipitate was rapidly vacuum filtered <br />and immediately hydrolyzed, under vacuum to recover <br />carbon dioxide from the barium carbonates for the <br />analysis. C-13 analysis was made on a small portion <br />of the same evolved gas. <br />Comment: <br />• buCaoe =+23.5 'G. <br />------------------------------------------- <br />Notes: This date is based upon the Libby half life (5570 years) for 1'C. The error stated is t1a as judged <br />by the analytical data alone. Our modern standard is 95% of the activity of N.B.S. Oxalic Acid. <br />The age is referenced to the year A.D. 1950. <br />