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Ms. Sara Harkins <br />Golder Associates <br />44 Union Road, Suite 300 <br />Lakewood CO 80228 <br />ioel.bolducCaholcim.com invoice and copy <br />sharkins(a)golder.com results <br />REPORT OF ANALYSES <br />7 samples for tritium in water <br />AT Sample <br />Mr. Joel Bolduc December 12, 2014 <br />Holcim US Inc. <br />1170 Transit Drive <br />Colorado Springs CO 80903 <br />Tritium TU Error TU <br />5182 <br />MW -1 <br />8.5 <br />0.45 <br />5183 <br />MW -2 <br />1.2 <br />0.30 <br />5184 <br />MW -3 <br />0.6 <br />0.29 <br />5185 <br />MW -4 <br />1.7 <br />0.32 <br />5186 <br />MW -6 <br />1.5 <br />0.32 <br />5187 <br />MW -7 <br />1.2 <br />0.32 <br />5188 <br />MW -20 <br />0.9 <br />0.32 <br />Explanation of tritium data: The detection limit, 0.6 TU, is calculated as 0 + 26 for low- counting <br />samples, and applies for 9 -fold enrichment and 1500 minutes of counting. Lower limits are <br />possible for higher enrichment factors. <br />A sample with a mean calculated TU value between 0 and 1Q , say 0.20 ± 0.35 TU, is reported <br />thus: <0.9 TU (= 0.2 + 2 x 0.35). A sample with a mean calculated TU value between 1 and <br />2Q , say 0.51 ± 0.38, is reported thus: <1.3 (Apparent 0.5), where 1.3 = 0.51 + 2 x 0.38, rounded. <br />Samples with calculated TU values greater than 26 are reported thus: 1.1 ± 0.4 TU. <br />C.J. Eastoe <br />Staff Scientist <br />