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wwwArtr®iiab.com Helena, MT 877-472-0711 - Billings, MT 800-735-4489 - Casper, WY 888-235-0515 <br />AsaWWFrcat>eabDw IM Gillette, WY 866-686-7175 • Rapid City, SD 888-672-1225 - College Station, TX 88B-880-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br /> Report Date: 04/19/11 <br />Client: Cotter Corporation <br />Project: Schwartz GW 3/24/11 S25646 & S25647 Work order: C11030817 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br /> Batch: R144195 <br />Method: A2320 B <br />Sample ID: MBLK 2 Method Blank Run: MANTECH_110329A 03/29!11 16:43 <br />Alkalinity, Total as CaC03 1.97 mg/L 1.0 <br />Bicarbonate as HC03 2.40 mg/L 1.0 <br />Sample ID: LCS Laboratory Control Sample Run: MANTECH_110329A 03/29/11 16:59 <br />Alkalinity, Total as CaC03 213 mg/L 5.0 106 90 110 <br />Sample ID: 011030834-003ADUP Sample Duplicate Run: MANTECH_110329A 03/29/11 19:12 <br />Alkalinity, Total as CaC03 148 mg/L 5.0 0.5 10 <br />Sample ID: 011030834-003AMS Sample Matrix Spike Run: MANTECH_110329A 03/29/11 19:20 <br />Alkalinity, Total as CaC03 281 mg/L 5.0 106 80 120 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 7 of 26