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WOWA erMlapcom t I 4"77 -472-0711 • Billings, MT M-735-446'8 • Casper, WY 888-235.1515 <br />A MInfEYeMrcrSYw ?ltft 66=7175 !Rapid C ft SD 888472-1225 • College Station. TX 888-610-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartz SW 03/08/11 S25677-S25684 <br />Report Date: 04/08/11 <br />Work Order: C11030280 <br />FAnalyte Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: A2320 B <br />Sample ID: MBLK Method Blank <br />Alkalinity, Total as CaC03 1.91 mg/L <br />Bicarbonate as HC03 2.33 mg/L <br />Sample ID: LCS Laboratory Control Sample <br />Alkalinity, Total as CaC03 207 mg/L <br />Sample ID: C11030297-001ADUP Sample Duplicate <br />Alkalinity, Total as CaC03 302 mg/L <br />Sample ID: C11030297-001AMS Sample Matrix Spike <br />Alkalinity, Total as CaC03 432 mg/L <br /> batch: H14:351 U <br /> Run: MANTECH 110310A 03/10/11 15:22 <br />1.0 <br />1.0 <br /> Run: MANTECH_110310A 03/10/11 15:37 <br />5.0 103 90 110 <br /> Run: MANTECH_110310A 03/10/11 17:31 <br />5.0 0.7 10 <br /> Run: MANTECH_110310A 03/10/11 17:40 <br />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 12 of 36