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., www.erwrgtrlbb.com <br />- n14 177-472-0711 - Billings, Wr IOD-735-4469 @ Casper, WY 668-235-0515 <br />Ao*"Esa+ftWSm 1052 ? b75 - Rapid City, So 898-872-1225 - College Station, TX 888=690-2218 <br /> QA/QC Summary Report <br /> Prepared by Casper, WY Branc h <br />Client: Cotter Corporation Report Date: 03/28/11 <br />Project: Schwartz GW 02/25/11 S25622 Work order: C11020751 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E200.7 Batch: R143426 <br />Sample ID: MB-110308A 4 Method Blank Run: ICP2-C_110308A 03/08/11 15:12 <br />Calcium ND mg/L 0.2 <br />Magnesium ND mg/L 0.05 <br />Potassium ND mg/L 0.02 <br />Sodium ND mg/L 0.3 <br />Sample ID: LF13-110308A 4 Laboratory For tified Blank Run: ICP2-C_110308A 03/08/11 15:16 <br />Calcium 47.6 mg/L 0.50 95 85 115 <br />Magnesium 49.4 mg/L 0.50 99 85 115 <br />Potassium 42.7 mg/L 0.50 85 85 115 <br />Sodium 47.7 mg/L 0.50 95 85 115 <br />Sample ID: C11020743-002BMS2 4 Sample Matrix Spike Run: ICP2-C_110308A 03/08/11 19:14 <br />Calcium 766 mg/L 1.1 92 70 130 <br />Magnesium 332 mg/L 1.0 95 70 130 <br />Potassium 249 mg/L 1.0 89 70 130 <br />Sodium 726 mg/L 1.4 100 70 130 <br />Sample ID: C11020743-002BMSD 4 Sample Matrix Spike Duplicate Run: ICP2-C_110308A 03/08/11 19:18 <br />Calcium 785 mg/L 1.1 100 70 130 2.6 20 <br />Magnesium 341 mg/L 1.0 99 70 130 2.9 20 <br />Potassium 251 mg/L 1.0 89 70 130 0.7 20 <br />Sodium 736 mg/L 1.4 103 70 130 1.3 20 <br />Method: E200.7 Batch: 29224 <br />Sample ID: MB-29224 2 Method Blank Run: ICP2-C_110310A 03/10/11 17:49 <br />Aluminum ND mg/L 0.01 <br />Manganese ND mg/L 0.0008 <br />Sample ID: LCS3-29224 2 Laboratory Co ntrol Sample Run: ICP2-C_110310A 03/10/11 17:53 <br />Aluminum 2.51 mg/L 0.10 100 85 115 <br />Manganese 2.63 mg/L 0.010 105 85 115 <br />Sample ID: C11020664-002CMS3 2 Sample Matrix Spike Run: ICP2-C_110310A 03/10/11 18:13 <br />Aluminum 5.50 mg/L 0.10 160 70 130 S <br />Manganese 2.84 mg/L 0.010 105 70 130 <br />Sample ID: C11020664-002CMSD 2 Sample Matrix Spike Duplicate Run: ICP2-C_110310A 03/10/11 18:17 <br />Aluminum 6.33 mg/L 0.10 194 70 130 14 20 S <br />Manganese 2.76 mg/L 0.010 101 70 130 2.9 20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />S - Spike recovery outside of advisory limits. <br />Page 7 of 20 <br />