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" rrwww.etwdab.com _ Helena, MT 677-472-0711 + Billings, MT 800-735-4489 a Casper, WY 888-235-9515 1 <br />1 Aub"E a3Mvu 1832 Mi lette, wy $66-686-7175 • Rapid city, SD BOB-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: 04/25/11 <br />Project: Schwartz-GW 03/30/11 S25671 & S25672 Work Order: C11030940 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br /> Analytical Run: SUB-13163665 <br />Method: E353.2 <br />Sample ID: ICV Initial Calibration Verification Standard 04/06/11 06:11 <br />Nitrogen, Nitrate+Nitrite as N 21.7 mg/L 0.060 100 90 110 <br /> Batch: B R163665 <br />Method: E353.2 <br />Sample ID: B11040208-001GMSD Sample Matrix Spike Duplicate Run: SUB-6163665 04/06/11 06:21 <br />Nitrogen, Nitrate+Nitrite as N 1.08 mg/L 0.010 100 90 110 0.2 10 <br />Sample ID: B1 1040208-001 GMS Sample Matrix Spike Run: SUB-13163665 04/06/11 06:19 <br />Nitrogen, Nitrate+Nitrite as N 1.08 mg/L 0.010 100 90 110 <br />Sample ID: LFB Laboratory Fortified Blank Run: SUB-B163665 04/06/11 06:14 <br />Nitrogen, Nitrate+Nitrite as N 0.994 mg/L 0.010 101 90 110 <br />Sample ID: MBLK Method Blank Run: SUB-6163665 04/06/11 06:12 <br />Nitrogen, Nitrate+Nitrite as N ND mg/L 0.10 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 16 of 24