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HAZEN <br />Coors Energy Company <br />Donald W. MacDonald <br />PO Box 467 <br />Golden, CO 80402 -0467 <br />SAMPLE NO. L252/12 -1 <br />SAMPLE IDENTIFICATION: <br />PARAMETER <br />Gross Alpha ( +- Precision *), pCi /g <br />Gross Beta ( +- Precision *), pCi /g <br />Hazen Research, Inc. <br />4601 Indiana Street <br />Golden, CO 80403 USA <br />Tel. (303) 279 -4501 <br />Fax (303) 278-1528 <br />BL #5 Bottom Ash - 12/13/2012 <br />RESULT <br />*Variability of the radioactive decay process (counting error) at the 95% confidence level, 1.96 sigma. <br />Certification ID's: CO /EPA C000008; CT PH -0152; KS E- 10265; NYELAP 11417; <br />PADEP 68- 00551; RI LA000284; TX T104704256 -11 -2; WI 998376610 <br />Results reported herein relate only to discrete samples submitted by the client. Hazen Research, <br />Inc does not warrant that the results are representative of anything other than the samples that <br />were received in the laboratory. <br />CODES' (T) = Total (D) = Dissolved (S) = Suspended (R) = Total Recoverable <br />(PD) = Potentially Dissolved < = Less Than <br />AHR -2012 <br />REPORT OF ANALYSIS <br />DETECTION <br />LIMIT METHOD <br />13( + -10) 7.6 SM 7110 B (Modified) <br />7.7( + -6.1) 5.4 SM 7110 B (Modified) <br />—80— <br />An Employee - Owned Company <br />DATE <br />HRI PROJECT <br />HRI SERIES NO <br />DATE RECD. <br />CUST. P.O.# <br />By: V <br />Robert Rostad <br />Laboratory Manager <br />January 7, 2013 <br />009 -18 <br />L252/12 <br />12/14/2012 <br />None Rec'd <br />ANALYSIS <br />DATE <br />1/2/2013 <br />@ 1127 <br />1/2/2013 <br />@ 1127 <br />Page 1 of 2 <br />ANALYST <br />AN <br />AN <br />