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www.enargytab.eom <br />u"Marg AiffYe+9llea,E>aatf!!t - 77.472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-2.35-0515 <br />7k,75 .• Raid City, SD e10 672-1225 • Cottage Station, TX 888-810-2218 <br /> Q A/QC Sum mary Report <br /> Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 03/21/11 <br />Project: Schwartz SW 2/17/11 S25626-S25633 Work Order: C11020554 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br /> Batch: R143231 <br />Method: E200.7 <br />Sample ID: MB-110301A 5 Method Blank Run: ICP2-C_110301A 03/01/11 14:50 <br />Calcium ND mg/L 0.40 <br />Iron ND mg/L 0.030 <br />Magnesium ND mg/L 0.10 <br />Potassium ND mg/L 0.10 <br />Sodium ND mg/L 0.60 <br />Sample ID: LFB-110301A 5 Laboratory Fortified Blank Run: ICP2-C_110301A 03/01/11 14:54 <br />Calcium 48.2 mg/L 0.50 96 85 115 <br />Iron 0.959 mg/L 0.030 96 85 115 <br />Magnesium 49.7 mg/L 0.50 99 85 115 <br />Potassium 44.0 mg/L 0.50 88 85 115 <br />Sodium 48.3 mg/L 0.50 97 85 115 <br />Sample ID: C1 1020613-001 BMS2 5 Sample Matri x Spike Run: ICP2-C_110301A 03/02/11 10:33 <br />Calcium 555 mg/L 1.0 70 130 A <br />Iron 1.89 mg/L 0.030 95 70 130 <br />Magnesium 223 mg/L 1.0 93 70 130 <br />Potassium 92.9 mg/L 1.0 87 70 130 <br />Sodium 326 mg/L 1.0 100 70 130 <br />Sample ID: C11020613-001BMSD 5 Sample Matri x Spike Duplicate Run: ICP2-C_110301A 03/02/11 10:37 <br />Calcium 565 mg/L 1.0 70 130 1.9 20 A <br />Iron 1.89 mg/L 0.030 95 70 130 0.0 20 <br />Magnesium 223 mg/L 1.0 93 70 130 0.0 20 <br />Potassium 92.1 mg/L 1.0 86 70 130 0.8 20 <br />Sodium 325 mg/L 1.0 99 70 130 0.2 20 <br />Qualifiers: <br /> A - The analyte level was greater than four times the spike level. In <br />RL - Analyte reporting limit. accordance with the method % recovery is not calculated. <br />ND - Not detected at the reporting limit. MDC - Minimum detectable concentration <br />Page 17 of 39