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ENERGY <br />4 ABORATORIES <br />Client: Cotter Corporation <br />Project: Schwartz SW 07/06/11 S25853- S25860 <br />Method: RA -05 <br />Sample ID: LCS- 228 -RA226 -5503 <br />Radium 228 <br />Sample ID: MB -RA226 -5503 <br />Radium 228 <br />Radium 228 precision ( ±) <br />Radium 228 MDC <br />Method: RA -05 <br />Sample ID: LCS- 228 -RA226 -5510 <br />Radium 228 <br />Sample ID: MB -RA226 -5510 <br />Radium 228 <br />Radium 228 precision ( ±) <br />Radium 228 MDC <br />Qualifiers: <br />IRL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />www.enerdab.com Helena, MT 877 - 472 - 0711 0 Billings, MT 800 735 - 4489 ® Casper, WY 888 - 235 - 0515 <br />AaaktialLxcalleoee 1952 Gillette, WY 866 686 - 7175 a Rapid City, SD 888 672 - 1225 ® College Station, TX 888 - 690 - 2218 <br />3 Method Blank <br />1 pCi /L <br />0.7 pCi /L <br />1 pCi /L <br />Sample ID: C11070275- 001FMS Sample Matrix Spike <br />Sample ID: C11070275 -001 FMSD Sample Matrix Spike Duplicate <br />Radium 228 15.5 pCi /L <br />3 Method Blank <br />0.1 pCi /L <br />0.7 pCi /L <br />1 pCi /L <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Analyte <br />Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Laboratory Control Sample <br />7.87 pCi /L <br />Laboratory Control Sample <br />6.83 pCi /L <br />Run: TENNELEC -3 110714A <br />102 80 120 <br />Run: TENNELEC -3 110714A <br />Radium 228 14.7 pCi /L 109 70 130 <br />Run: TENNELEC -3 110714A 07/26/11 09:23 <br />Run: TENNELEC- 3_110714A 07/26/11 09:23 <br />114 70 130 5.3 33.5 <br />Run: TENNELEC- 3_110718B <br />100 80 120 <br />Run: TENNELEC -3 110718B <br />Report Date: 08/15/11 <br />Work Order: C11070275 <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Batch: RA228 -3810 <br />07/26/11 09:23 <br />Page 32 of 43 <br />07/26/11 09:23 <br />U <br />Batch: RA228 -3813 <br />07/29/11 12:43 <br />07/29/11 12:43 <br />U <br />Sample ID: 011070277- 005AMS Sample Matrix Spike Run: TENNELEC- 3_110718B 07/29/11 12:43 <br />Radium 228 13.5 pCi /L 100 70 130 <br />Sample ID: C11070277- 005AMSD Sample Matrix Spike Duplicate Run: TENNELEC- 3_110718B 07/29/11 12:43 <br />Radium 228 13.0 pCi /L 97 70 130 3.8 37.2 <br />