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A www.en &48b.com <br />AuryE[edFsc+IieaSAac? 192 <br />Y QH-486-71.78 Rapid city, sD 886-6I2-1225 * college Station, 7X 886-690-2218 <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 /> Batch: R144469 <br />Method: A2320 B <br />Sample ID: MBLK 2 Method Blank Run: MANTECH_110405A 04/05/11 13:36 <br />Alkalinity, Total as CaC03 ND mg/L 1.0 <br />Bicarbonate as HC03 1.05 mg/L 1.0 <br />Sample ID: LCS Laboratory Control Sample Run: MANTECH_110405A 04/05/11 13:53 <br />Alkalinity, Total as CaC03 211 mg/L 5.0 105 90 110 <br />Sample ID: C11040018-002ADUP Sample Duplicate Run: MANTECH_110405A 04/05/11 17:05 <br />Alkalinity, Total as CaC03 273 mg/L 5.0 0.2 10 <br />Sample ID: 011040018-002AMS Sample Matrix Spike Run: MANTECH_110405A 04/05/11 17:14 <br />Alkalinity, Total as CaC03 408 mg/L 5.0 108 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 24