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ENERGY <br />LAE-3OI7ATORIE:.s <br />Analyte <br />www.energylab.com <br />Analytical fxc.PMnce Sloe 1952 <br />Client: Cotter Corporation <br />Project: Schwartz GW 9/19/12 S26642 <br />Helena, MT 671- 412 -0711 • Billings, MT 800 -735 -4489 • Casper, WY 888- 235 -0515 <br />Gillette, WY 866 -686 -7175 • Rapid City, SD 888 -672 -1225 • College Station, TX 888 -690 -2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Revised Date: 10/26/12 <br />Report Date: 10/17/12 <br />Work Order: C12090732 <br />Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E200.7 Analytical Run: ICP2- C_121003A <br />Sample ID: ICV 2 Initial Calibration Verification Standard 10/03/12 12:09 <br />Iron 5.00 mg /L 0.030 100 95 105 <br />Manganese 5.10 mg /L 0.010 102 95 105 <br />Sample ID: ICSA 2 Interference Check Sample A 10/03/12 12:34 <br />Iron 192 mg /L 0.030 96 80 120 <br />Manganese 0.00120 mg /L 0.010 <br />Sample ID: ICSAB 2 Interference Check Sample AB 10/03/12 12:38 <br />Iron 193 mg /L 0.030 97 80 120 <br />Manganese 0.511 mg /L 0.010 102 80 120 <br />Method: E200.7 <br />Sample ID: MB -35136 2 Method Blank <br />Iron ND mg /L 0.005 <br />Manganese ND mg /L 0.0002 <br />Run: ICP2- C_121003A <br />Sample ID: LCS3 -35136 2 Laboratory Control Sample Run: ICP2- C_121003A <br />Iron 2.48 mg /L 0.030 99 85 115 <br />Manganese 2.56 mg /L 0.0010 103 85 115 <br />Sample ID: C12090779- 001CMS3 2 Sample Matrix Spike Run: ICP2- C_121003A <br />Iron 2.59 mg /L 0.030 100 70 130 <br />Manganese 2.59 mg /L 0.0010 103 70 130 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Batch: 35136 <br />10/03/12 16:26 <br />10/03/12 16:30 <br />10/03/12 16:46 <br />Sample ID: 012090779 -001CMSD 2 Sample Matrix Spike Duplicate Run: ICP2- C_121003A 10/03/12 16:50 <br />Iron 2.56 mg /L 0.030 99 70 130 1.4 20 <br />Manganese 2.55 mg /L 0.0010 102 70 130 1.5 20 <br />Page 7 of 21 <br />