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• a www.energylab.com Helena, MT B77-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 <br />Awly&sl ExcdkaeeSlnca 1951 Gillette, WY 866-686-7175 • Rapid City, SD 888-672-1225 • College Station, T% 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 09/16/10 <br />Project: Schwartzwalder Water Monitoring Program Work Order: C10080658 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimtt Qual <br />Method: E200.7 Batch: R136424 <br />Sample ID: MB-100824A 5 Method Blank Run: ICP2-C_100824A 08/24/10 12:36 <br />Aluminum ND mg/L 0.01 <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: LFB-100824A 5 Laboratory Fortified Blank Run: ICP2-C_100824A 08/24/10 12:40 <br />Aluminum 0.960 mg/L 0.10 96 85 115 <br />Calcium 50.4 mg/L 0.50 101 85 115 <br />Magnesium 49.5 mg/L 0.50 99 85 115 <br />Potassium 46.7 mg/L 0.50 93 85 115 <br />Sodium 48.6 mg/L 0.50 97 85 115 <br />Sample ID: C10080651-001BMS2 5 Sample Matrix Spike Run: ICP2-C_100824A 08/24/10 16:00 <br />Aluminum 1.97 mg/L 0.10 97 70 130 <br />Calcium 235 mg/L 1.0 103 70 130 <br />Magnesium 173 mg/L 1.0 99 70 130 <br />Potassium 97.5 mg/L 1.0 93 70 130 <br />Sodium 104 mg/L 1.0 98 70 130 <br />Sample ID: C10080651-001 BMSD 5 Sample Matrix Spike Duplicate Run: ICP2-C_100824A 08/24/10 16:04 <br />Aluminum 1.99 mg/L 0.10 98 70 130 1.1 20 <br />Calcium 236 mg/L 1.0 105 70 130 0.7 20 <br />Magnesium 173 mg/L 1.0 100 70 130 0.1 20 <br />Potassium 99.1 mg/L 1.0 94 70 130 1.7 20 <br />Sodium 103 mg/L 1.0 98 70 130 0.2 20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 10 of 25