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ENERGY <br />BORATORIES <br />Client: Cotter Corporation <br />Method: E353.2 <br />Sample ID: MBLK <br />Nitrogen, Nitrate +Nitrite as N <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />www.energylab.com Helena, Mi 617 -472 -0711 a Billings, MT 800 - 735 -4489 e Casper, WY 888 -235 -0515 <br />AaarytlmlExeedencesInc.1952 Gillette, WY 866- 686 -7175 • Rapid City, SD 886- 612 -1225 • College Station, TX 888- 690 -2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Project: Schwartz SW 07/06/11 S25853- S25860 Work Order: C11070275 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E353.2 Analytical Run: SUB - 8168742 <br />Sample ID: ICV Initial Calibration Verification Standard 07/12/11 07:04 <br />Nitrogen, Nitrate +Nitrite as N 21.6 mg /L 0.060 99 90 110 <br />Method Blank <br />ND mg /L 0.007 <br />Run: SUB- B168742 <br />Sample ID: LFB Laboratory Fortified Blank Run: SUB- B168742 07/12/11 07:07 <br />Nitrogen, Nitrate +Nitrite as N 0.980 mg /L 0.010 100 90 110 <br />Sample ID: B11070808- 001DMSD Sample Matrix Spike Duplicate Run: SUB- B168742 07/12/11 07:47 <br />Nitrogen, Nitrate +Nitrite as N 1.34 mg /L 0.010 99 90 110 0.6 10 <br />Sample ID: B11070808 -001 DMS Sample Matrix Spike Run: SUB- B168742 07/12/11 07:46 <br />Nitrogen, Nitrate +Nitrite as N 1.35 mg /L 0.010 99 90 110 <br />ND - Not detected at the reporting limit. <br />Report Date: 08/15/11 <br />Batch: B R168742 <br />07/12/11 07:05 <br />Page 28 of 43 <br />