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l' <br />GEOCHRON LABORATORIES adivision of <br />KRUEGER ENTERPRISES, INC. <br />71t CONCORD AVENUE • CAMBRIDGE. MASSACHUSETTS 02138 • U.S.A <br />TELEPHONE (617) 8763691 TELEFAX (617) 661-0148 <br />RADIOCARBON AGE DETERMINATION <br />REPORT OF ANALYTICAL WORK <br />Our Sample No. GX-22906 <br />YourReterence: letter of 02/23/97 <br />Submitted by: i•ir. Celly Payne <br />!4ayo ~ Associates <br />710 East 100 IJorth <br />Lindon, Utah II4042 <br />Date Received: 02/26/97 <br />Date Reported: 0 3/ 1 4/ 9 7 <br />Sample Name: 1 wETG E3 XC20 <br />groundwater precipitate <br />• AGE = Greater than 35,900 C-14 years BP (C-13 corrected). <br />Less than 1.15 ~ 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: Relatively small sample; approximately 0.83 ora~ns carbon. <br />. buCaoa = +10.7 ~ <br />Notes: This date is based upon the Libby half life (5570 years) for "C. The error stated is tto 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 />