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..... ..__........ _ ... <br />www.er.orgylab.com Helena, MT 877-472-0711 • Billings MT 800-735-4489 . Casper WY 888-235.0515 <br />Aaalyt rs/Errenanca since Ism Gillette, WY 866-686-7175 . Rapid City, SD 888-672-1225 • College Station, TX 888-690-2218 <br /> QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 12/10/10 <br />Project: Schwanzwalder Wate r Monitoring Program - SW Work Order: C10110203 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Clual <br />Method: A2320 B Batch: R139484 <br />Sample ID: MBLK 2 Method Blank Run: MANTECH_101104B 11/04/10 16:21 <br />Alkalinity, Total as CaC03 ND mg/L 1 <br />Bicarbonate as HC03 ND mg/L 1 <br />Sample ID: LCS Laboratory Control Sample Run: MANTECH_101104B 11/04110 16:36 <br />Alkalinity, Total as CaC03 205 mg/L 5.0 103 90 110 <br />Sample ID: C10110179-002ADUP 2 Sample Duplicate Run: MANTECH..,.101104B 11104/10 17:07 <br />Alkalinity, Total as CaC03 277 mg/L 5.0 0.1 10 <br />Bicarbonate as HC03 338 mg/L 5.0 0.1 10 <br />Sample ID: C10110179-002AMS Sample Matrix Spike Run: MANTECH_101104B 11/04/10 17:16 <br />Alkalinity, Total as CaC03 411 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 15 of 43