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GEOCHRON LABORATORIES advisionof <br />KRUEGER ENTERPRISES, INC. <br />717 CONCORD AVENUE • CAMBRIDGE. MASSACHUSETTS 02738 • U . S . A <br />TELEPHONE: (617) 676-3691 TELEFAx: (617) 661-0148 <br />RADIOCARBON AGE DETERMINATION <br />REPORT OF ANALYTICAL WORK <br />Our Sample No. GX-24018-AP1S <br />Date Received: <br />04/07/98 <br />Your Reference: Mountain Coal Company <br />Submitted by: Mr. Erik C. Petersen <br />Mayo & Associates, L.C. <br />710 East 100 North <br />Lindon, Utah 84042 <br />Date Reported: <br />05/18/98 <br />Sample Name: 10 TLGT XC-3 Main Sump 03/09/98 <br />groundwater <br />. AGE = 31,570 +/- 440 C-14 years BP (C-13 corrected). <br />(1.96 +/- 0.11)8 of the modern (1950) C-14 activity. <br />Description: Sample of groundwater. <br />Pretreatment: The sample was rapidly transferred, by aspiration, to <br />an evacuated flask, and acidified to recover carbon <br />dioxide from the dissolved carbonates for the analysis. <br />C-13 analysis was made on a small portion of the same <br />evolved gas. <br />The sample was very small in size and analysis by <br />accelerator mass spectrometry was required. <br />Comment: <br /> <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 />