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www.etwm4ab.com <br />Aes"WEn+iMrrrcrA= IM <br />Helena, MT 877472 -0711 • Billings, MT 800- 7354489 • Casper, WY 888- 235 -0515 <br />WY <br />CLIENT: Cotter Corporation Revised Date: 06/14/13 <br />Project: Schwartz SW 05/08/13 (S26871 & S26873) Report Date: 05/20/13 <br />Sample Delivery Group: C13050368 CASE NARRATIVE <br />TX <br />REVISED /SUPPLEMENTAL REPORT <br />The attached analytical report has been revised from a previously submitted report due to the request by Frank Adamic on <br />May 29, 2013 for the addition of Total and Dissolved Radium 226 on both samples. The data presented here is from that <br />additional analysis. The report has been revised and replaces any previously issued report in its entirety. <br />RA226 ANALYSIS <br />USNRC Regulatory Guide 4.14 provides guidance on Minimum Detectable Concentrations (MDC) that should be achieved <br />in samples for this radionuclide. The sample- specific MDC for this sample could not be achieved due to lack of sufficient <br />sample volume. Please consult with your local regulatory agency prior to using these results for compliance purposes. <br />Page 2 of 10 <br />