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ENERGY <br />LABORATORIES <br />foc <br />Client: Cotter Corporation <br />Method: E353.2 <br />Sample ID: MBLK <br />Nitrogen, Nitrate +Nitrite as N <br />www.energylab.com <br />Analytical Excellence Since 1852 <br />Method Blank <br />ND mg /L 0.003 <br />Sample ID: LFB Laboratory Fortified Blank <br />Nitrogen, Nitrate +Nitrite as N 1.00 mg /L <br />Sample ID: B12090883- 001DMS Sample Matrix Spike <br />Nitrogen, Nitrate +Nitrite as N 0.997 mg /L <br />Sample ID: B12090883 -001 DMSD Sample Matrix Spike Duplicate <br />Nitrogen, Nitrate +Nitrite as N 1.01 mg /L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Helena, MT 877 -472 -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 />Report Date: 10/18/12 <br />Project: Schwartz - GW 9/6/12 S26563 Work Order: C12090274 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E353.2 Analytical Run: SUB- B191720 <br />Sample ID: ICV Initial Calibration Verification Standard 09/14/12 07:37 <br />Nitrogen, Nitrate +Nitrite as N 22.9 mg /L 0.060 105 90 110 <br />Run: SUB- B191720 <br />Batch: B R191720 <br />09/14/12 07:39 <br />Run: SUB- B191720 09/14/12 07:40 <br />0.010 102 90 110 <br />Run: SUB- B191720 09/14/12 14:35 <br />0.010 101 90 110 <br />Run: SUB- B191720 09/14/12 14:36 <br />0.010 102 90 110 1.2 10 <br />ND - Not detected at the reporting limit. <br />Page 17 of 23 <br />