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www.enerdab.com Helena, W 877-4724111 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 <br />` Iu"WErea &M ID2 Gillette, WY 868-686-7175 • Rapid City, SD 886-672-1225 • College Station, TX 888-680-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 11/29/10 <br />Project: Schwartzwalder Water Monitoring Program Work Order: C10100734 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E353.2 Batch: R139718 <br />Sample ID: MBLK-1 Method Blank Run: TECHNICON_101110A 11/10/10 11:59 <br />Nitrogen, Nitrate+Nitrite as N ND mg/L 0.04 <br />Sample ID: LCS-2 Laboratory Control Sample Run: TECHNICON_101110A 11/10/10 12:01 <br />Nitrogen, Nitrate+Nitrite as N 2.43 mg/L 0.10 97 90 110 <br />Sample ID: 010100982-001DMS Sample Matrix Spike Run: TECHNICON_101110A 11/10/10 13:34 <br />Nitrogen, Nitrate+Nitrite as N 2.99 mg/L 0.10 104 90 110 <br />Sample ID: C10100982-001DMSD Sample Matrix Spike Duplicate Run: TECHNICON_101110A 11/10/10 13:36 <br />Nitrogen, Nitrate+Nitrite as N 2.97 mg/L 0.10 103 90 110 0.7 10 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 19 of 29