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www.enerdab.corn � Helena, MT 677- 472 -0711 • Billings, MT 800- 735 -4489 • Casper, WY 888 -235 -0515 <br />°1 ysst Gillette, WY 866 -686 -1175 • Rapid City, SO 886- 672 -1225 • College Station, TX 888- 690 -2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 05/06/13 <br />Project: Schwartz GW 4/11/13 S26889 Work Order: C13040486 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E200.7 <br />5 <br />Interference Check Sample AB <br />447 mg /L <br />175 mg /L <br />496 mg /L <br />0.0173 mg /L <br />0.107 mg /L <br />0.50 <br />0.030 <br />0.50 <br />0.50 <br />0.50 <br />89 <br />87 <br />99 <br />Analytical Run: ICP4- C_130417A <br />Sample ID: ICV <br />5 Initial Calibration Verification Standard <br />04/17/13 11:23 <br />Calcium <br />50.9 mg /L <br />0.50 <br />102 <br />95 <br />105 <br />Iron <br />5.10 mg /L <br />0.030 <br />102 <br />95 <br />105 <br />Magnesium <br />49.9 mg /L <br />0.50 <br />100 <br />95 <br />105 <br />Potassium <br />50.9 mg /L <br />0.50 <br />102 <br />95 <br />105 <br />Sodium <br />51.5 mg /L <br />0.50 <br />103 <br />95 <br />105 <br />Sample ID: ICSA <br />5 Interference Check Sample A <br />ND mg /L <br />0.04 <br />04/17/13 11:37 <br />Calcium <br />456 mg /L <br />0.50 <br />91 <br />80 <br />120 <br />Iron <br />176 mg /L <br />0.030 <br />88 <br />80 <br />120 <br />Magnesium <br />496 mg /L <br />0.50 <br />99 <br />80 <br />120 <br />Potassium <br />0.0234 mg /L <br />0.50 <br />Iron <br />Sodium <br />0.0440 mg /L <br />0.50 <br />85 115 <br />Magnesium <br />Sample ID: ICSAB <br />Calcium <br />Iron <br />Magnesium <br />Potassium <br />Sodium <br />5 <br />Interference Check Sample AB <br />447 mg /L <br />175 mg /L <br />496 mg /L <br />0.0173 mg /L <br />0.107 mg /L <br />0.50 <br />0.030 <br />0.50 <br />0.50 <br />0.50 <br />89 <br />87 <br />99 <br />80 120 <br />80 120 <br />80 120 <br />04/17/13 11:41 <br />Method: E200.7 <br />Batch: R172580 <br />Sample ID: MB- 1304017A <br />5 <br />Method Blank <br />Run: ICP4- C_130417A <br />04/17/13 12:00 <br />Calcium <br />ND mg /L <br />0.02 <br />Iron <br />ND mg /L <br />0.002 <br />Magnesium <br />ND mg /L <br />0.02 <br />Potassium <br />ND mg /L <br />0.04 <br />Sodium <br />ND mg /L <br />0.2 <br />Sample ID: LFB- 1304017A <br />5 <br />Laboratory Fortified Blank <br />Run: ICP4- C_130417A <br />04/17/13 12:04 <br />Calcium <br />48.8 mg /L <br />0.50 <br />98 <br />85 115 <br />Iron <br />0.974 mg /L <br />0.030 <br />97 <br />85 115 <br />Magnesium <br />48.1 mg /L <br />0.50 <br />96 <br />85 115 <br />Potassium <br />48.2 mg /L <br />0.50 <br />96 <br />85 115 <br />Sodium <br />48.5 mg /L <br />0.50 <br />97 <br />85 115 <br />Sample ID: 013040435 -008CMS2 <br />5 <br />Sample Matrix Spike <br />Run: ICP4- C_130417A <br />04/17/13 15:01 <br />Calcium <br />1080 mg /L <br />1.0 <br />88 <br />70 130 <br />Iron <br />9.36 mg /L <br />0.030 <br />92 <br />70 130 <br />Magnesium <br />692 mg /L <br />1.0 <br />93 <br />70 130 <br />Potassium <br />467 mg /L <br />1.0 <br />90 <br />70 130 <br />Sodium <br />601 mg /L <br />2.1 <br />90 <br />70 130 <br />Sample ID: C13040435- 008CMSD <br />5 <br />Sample Matrix Spike Duplicate <br />Run: ICP4- C_130417A <br />04/17/13 15:04 <br />Calcium <br />1090 mg /L <br />1.0 <br />89 <br />70 130 <br />0.4 20 <br />Iron <br />937 mg /L <br />0.030 <br />92 <br />70 130 <br />0.1 20 <br />Magnesium <br />689 mg /L <br />1.0 <br />92 <br />70 130 <br />0.4 20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />ND - Not detected <br />at the reporting limit. <br />MDC - Minimum detectable concentration <br />Page 8 of 21 <br />